Abstract

The invention discloses a non-volatile memory cell based on a threshold switch and an operation method thereof, which belong to micro-nano electronics technology. The non-volatile memory cell includes a first metal electrode layer, a threshold switch layer, and a second metal electrode layer stacked in sequence. The threshold switch layer contains a chalcogenide semiconductor material, and the threshold voltage of the threshold switch layer is able to be switched between initial threshold voltage and high threshold voltage under the operation of an electric signal. The non-volatile memory cell realizes storage of information based on the threshold change controllable by the threshold switch. The advantages of such threshold switch lie in nanosecond-level switching speed, good scalability and easy three-dimensional stacking. The realized novel threshold switch memory cell also has the above-mentioned advantages, and is expected to be applied in DRAM application scenarios where the technology node is less than 20 nm. The storage density may be improved considerably on the premise of matching the access speed of DRAM. Moreover, the non-volatile memory cell based on the threshold switch has a low process cost and is compatible with the CMOS process, which facilitates the large-scale production of the memory cell.

IPC Classes  ?

• H10B 63/00 - Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
• G11C 13/00 - Digital stores characterised by the use of storage elements not covered by groups , , or

Abstract

A homogeneous optoelectronic reservoir computing system based on a nitrogen-doped Ge—Sb—Te material includes an optoelectronic reservoir layer and a readout layer connected to each other; the optoelectronic reservoir layer includes multiple optical synaptic devices based on nitrogen-doped Ge—Sb—Te material, and the optical synaptic devices realize perception and nonlinear response of image light signals based on the photoconductive effect of a single light pulse and the paired-pulse facilitation effect under a double light pulse; the readout layer includes multiple electrical synaptic devices based on the nitrogen-doped Ge—Sb—Te material, and the electrical synaptic devices realize linear response and image recognition of output signals of the optoelectronic reservoir layer based on linearity, symmetry long-term potentiation function, and long-term depression function. In the system of the disclosure, both the reservoir layer and the readout layer use devices based on the same material.

IPC Classes  ?

• G06N 3/063 - Physical realisation, i.e. hardware implementation of neural networks, neurons or parts of neurons using electronic means
• C01B 19/00 - SeleniumTelluriumCompounds thereof

Abstract

The present invention belongs to the technical field of morphology measurement. Disclosed are a measurement apparatus and method for measuring the deformation and surface microstructure of a stacked sheet. The measurement apparatus comprises a light source, a collimating lens, a light splitter, an objective lens, an optical path difference compensation glass plate, a reflecting mirror, a displacement stage, a beam steering micro device, a tube lens and a camera. During a measurement process, the light splitter splits light in the light source into transmitted light and refracted light, the transmitted light passes through the beam steering micro device, extends between adjacent stacked sheets to be measured, and then becomes measurement light, the measurement light is reflected to the surfaces of the stacked sheets, the optical path difference compensation glass plate is used for compensating for an optical path difference generated by the measurement light passing through the beam steering micro device, the reflecting mirror is used for reflecting the refracted light from the light splitter as reference light into the tube lens, and the tube lens is used for converging the reference light and the measurement light to form an interference information pattern in the camera. By means of the measurement method in the present invention, the problem of it being difficult to accurately measure the curved surface deformation of the surface of each layer of thin sheet in a stacked sheet and the morphology of the surface microstructure of the stacked sheet can be solved.

IPC Classes  ?

• G01B 11/16 - Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
• G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
• G01B 11/06 - Measuring arrangements characterised by the use of optical techniques for measuring length, width, or thickness for measuring thickness
• G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light

Abstract

Provided is a design method for a threshold switch device, a threshold switch device, and a dynamic memory, relating to the technical field of memories. The design method includes: testing a hold voltage, a low-resistance-state (LRS) resistance, and a threshold voltage of a threshold switch function layer; determining a target hold voltage of a threshold switch device according to the threshold voltage; determining a resistance sum of a top electrode and a bottom electrode of the threshold switch device according to the hold voltage and the LRS resistance of the threshold switch function layer and the target hold voltage of the threshold switch device; and selecting materials and thin film parameters of the top electrode and the bottom electrode according to the resistance sum of the top electrode and the bottom electrode of the threshold switch device, to design the threshold switch device meeting the target hold voltage.

IPC Classes  ?

• H10B 63/00 - Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
• G06F 30/36 - Circuit design at the analogue level

Abstract

A mixed-signal operational circuit is provided. For the operational circuit part of the mixed-signal operational circuit, a first capacitor is used to determine the output terminal of the logic operational circuit, a second capacitor is used to provide a certain voltage, and a logic operational channel selects the charge channel from the second capacitor to the first capacitor based on the data signal of each input, so as to superimpose the voltage value at the output terminal. Time-division multiplexing is achieved through successive injection, thereby an analog voltage value related to the logical operation result is established at the output terminal.

IPC Classes  ?

• H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
• H03K 19/20 - Logic circuits, i.e. having at least two inputs acting on one outputInverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits

Abstract

The present invention belongs to the field of medical image registration, and more specifically, relates to a building method of a multi-modal three-dimensional medical image segmentation and registration model, and an application thereof. The method includes: acquiring medical images of two modalities of each target, and respectively using the images as a reference image and a floating image to acquire a training sample; and using the training sample to simultaneously optimize three network parameters, so as to acquire a segmentation and registration model formed by a reference image segmentation model, a floating image segmentation model, and a registration model. The reference image and floating image segmentation models are respectively used to perform multi-scale segmentation on corresponding images to acquire multi-scale segmentation results having the same maximum scale as the original images. The registration model are used to acquire a multi-scale deformation field on the basis of the reference image, the floating image, a maximum scale reference image segmentation result, and a maximum scale floating image segmentation result. Each of a segmentation loss and a registration loss are the sum of segmentation and registration losses in each scale, and the segmentation loss includes a first-order gradient loss and/or a level set energy function loss. The present invention can improve registration accuracy.

IPC Classes  ?

• G06T 7/174 - SegmentationEdge detection involving the use of two or more images
• G06T 7/11 - Region-based segmentation
• G06T 7/33 - Determination of transform parameters for the alignment of images, i.e. image registration using feature-based methods

Abstract

The disclosure provides a method and system for trajectory tracking control of a vehicle-manipulator coupling system with finite time prescribed performance. Specifically, a coupling weaken trajectory planning method is designed to reduce the system's coupling effects. A finite time performance function is designed to constrain the trajectory tracking error. In a case the constraint conditions corresponding to the finite time performance function are satisfied, the trajectory tracking error is converted to obtain a transformed error. The sliding mode surface is designed based on the transformed error to control the transformed error to converge in a finite time, and the external disturbance of the vehicle-manipulator coupling system is observed based on non-linear disturbance observer. The control input of the vehicle-manipulator coupling system is designed based on the sliding mode surface and the non-linear disturbance observer output. This ensures that the vehicle-manipulator coupling system can operate precisely along the desired trajectory.

IPC Classes  ?

• G05D 1/689 - Pointing payloads towards fixed or moving targets
• B25J 9/16 - Programme controls
• B63G 8/00 - Underwater vessels, e.g. submarines
• G05D 1/46 - Control of position or course in three dimensions
• G05D 109/30 - Water vehicles

Abstract

Provided in the present invention are an intracranial/in-vivo chamber signal monitoring sensor, a preparation method therefor, and a system thereof. The sensor comprises: a sensor base body, being of a cubic structure and prepared from a flexible deformable material, the sensor base body being detachably arranged in a closed space; a plurality of closed chambers, each closed chamber being formed in the sensor base body in a height direction of the sensor base body, and the plurality of closed chambers being periodically arranged in n×n; and a plurality of filling materials adapted to the number of the closed chambers, each filling material correspondingly filling one closed chamber, a material sound velocity of the filling material being greater than or equal to twice that of the flexible deformable material, or the material sound velocity of the flexible deformable material being greater than or equal to twice that of the filling material. The sensor adopted by the present invention has no toxic or side effects, and can be used for long-term, continuous, in-situ, accurate monitoring of environmental signals such as pressure, pH, and temperature in the intracranial/in-vivo chamber to carry out multi-modal sensing.

IPC Classes  ?

• A61B 8/12 - Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters

Abstract

The invention relates to the technical field of metal material processing engineering, discloses a full-automatic full-process modeling method and system of crystal plasticity finite element model for laser welding weld, which adopts MATLAB to call ABAQUS and PYTHON for co-simulation programming. In this text, a full-automatic modeling method of the crystal plasticity finite element model for laser welding weld is proposed, and a one-key crystal plastic finite element model for laser welding weld is established based on EBSD experimental data. In addition, the full-process full-automatic modeling method of crystal plastic finite element for laser welding weld is universal, and can be used for the establishment of the crystal plasticity finite element model for the microstructure of the base material of aluminum alloy, titanium alloy, magnesium alloy, stainless steel and other materials.

IPC Classes  ?

• B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
• B23K 26/21 - Bonding by welding
• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
• G06F 111/10 - Numerical modelling
• G06F 119/10 - Noise analysis or noise optimisation

Abstract

iiiiiii into an array row, otherwise, returning an operation failure. The present invention can complete key-value pair index operations in a memory, thereby improving the parallelism of the index operations, and reducing the delay of the index operations.

IPC Classes  ?

• G06F 3/06 - Digital input from, or digital output to, record carriers
• G11C 16/24 - Bit-line control circuits

Abstract

An ammonia sensor based on a small-period long-period fiber grating, comprising a small-period long-period fiber grating (13) and a gas-sensitive layer (12) coated on the outer surface of a single-mode fiber (11). The small-period long-period fiber grating (13) corresponds to the gas-sensitive layer (12) in position; the small-period long-period fiber grating (13) is of a fiber grating structure inscribed in the single-mode fiber (11); the cladding layer surface of the small-period long-period fiber grating (13) is a refractive index sensitive area; a high molecular polymer is used for the gas-sensitive layer (12); and the refractive index of the high molecular polymer changes along with the change of the concentration of ammonia for ammonia measurement. The ammonia sensor has the advantages of compact structure, high sensitivity, good stability, short response time, low manufacturing difficulty, low cost, and high anti-interference capability, the surrounding environment temperature can be monitored at the same time, and the impact of temperature fluctuation on ammonia measurement is overcome.

IPC Classes  ?

• G01N 21/41 - RefractivityPhase-affecting properties, e.g. optical path length
• G01N 21/01 - Arrangements or apparatus for facilitating the optical investigation

Abstract

Disclosed is a method for establishing a 3D medical image segmentation model based on masked modeling and application thereof includes: establishing a semi-supervised learning network, wherein a student network includes an encoding module for extracting latent features and a segmentation decoder that predicts segmentation results, a teacher network includes an encoding module and a segmentation decoder that are structurally consistent with the student network; training the semi-supervised learning network, wherein during training, two random masking operations are performed on each image, and the image is input to the two networks respectively; optimizing and updating the weight of the student network, and transferring the updated weight to the teacher network, wherein the training loss function includes prototype representation loss, which is used to characterize the difference between the prototypes extracted and generated by the two networks; the student network may further include a reconstruction decoder and an auxiliary segmentation decoder.

IPC Classes  ?

• G06V 10/778 - Active pattern-learning, e.g. online learning of image or video features
• G06V 10/26 - Segmentation of patterns in the image fieldCutting or merging of image elements to establish the pattern region, e.g. clustering-based techniquesDetection of occlusion
• G06V 10/44 - Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersectionsConnectivity analysis, e.g. of connected components
• G06V 10/774 - Generating sets of training patternsBootstrap methods, e.g. bagging or boosting
• G06V 10/776 - ValidationPerformance evaluation
• G06V 20/64 - Three-dimensional objects

Abstract

An ammonia gas sensor based on a small-period long-period fiber grating is provided. The ammonia gas sensor based on a small-period long-period fiber grating includes a small-period long-period fiber grating and a gas sensitive layer coated on an external surface of a single-mode fiber, the small-period long-period fiber grating is a fiber grating structure inscribed at the interior of the single-mode fiber, the cladding surface of small-period long-period fiber grating is a refractive index sensitive area, the gas sensitive layer adopts a high molecular polymer, and a refractive index of the high molecular polymer changes with the change of ammonia concentration for ammonia detection. The ammonia gas sensor of the present disclosure has the advantages of compact structure, high sensitivity, good stability, short response time, low production difficulty, and strong anti-interference ability, and the ammonia gas sensor may monitor the ambient temperature simultaneously.

IPC Classes  ?

• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• G01K 11/3206 - Measuring temperature based on physical or chemical changes not covered by group , , , or using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
• G01N 21/41 - RefractivityPhase-affecting properties, e.g. optical path length

Abstract

x1-x1-x, wherein x is the percentage of the number of molecules of HfN in the total number of molecules. The lattice mismatch degree of a Ge-Sb-Te alloy and HfN is greater than 20%, so as to inhibit the crystallization degree of a Ge-Sb-Te phase change memory material. In the present invention, HfN is doped into the Ge-Sb-Te alloy, and it is ensured that the lattice mismatch degree of HfN and the Ge-Sb-Te alloy is greater than 20%, such that the HfN-Ge-Sb-Te phase change material can form a more stable amorphous structure, thereby significantly inhibiting the crystallization degree thereof and reducing the crystallization area thereof, such that the amorphous stability of the Ge-Sb-Te phase change material is improved, and the RESET power consumption of a Ge-Sb-Te phase change memory device is greatly reduced.

IPC Classes  ?

• H10B 63/10 - Phase change RAM [PCRAM, PRAM] devices

Abstract

The invention relates to a virtual reality display device based on phase change materials, which has characteristics of a high resolution, a large color gamut and a high frame rate, and can provide a more real and vivid virtual reality experience. The display technology mainly includes a backlight emitting component, a quantum dot excitation layer, an all-dielectric phase change filter structure, an optical lens, a reflection mirror and a device cover. The backlight emitting component comprises an LED excitation light source and a diffusion plate for generating and dispersing light. The virtual reality display technology based on phase change materials has a wide application prospect. In addition to being used in virtual reality devices such as VR headsets, it can also be used in augmented reality devices such as AR glasses. When implemented, it can be designed and adjusted according to actual needs to provide a best user experience.

IPC Classes  ?

• G02B 27/01 - Head-up displays
• G02B 5/20 - Filters
• G02F 1/13357 - Illuminating devices

Abstract

Disclosed is an addressable arrayed electrohydrodynamic jet control device having a top-mounted control electrode, comprising an ink cartridge used for storing ink, a nozzle plate arranged at the bottom of the ink cartridge, a control electrode, a nozzle array and a high-voltage module. The nozzle plate is a flat plate having through holes, and the control electrode and the nozzle array are arranged on the lower surface of the nozzle plate. The high-voltage module comprises a first high-voltage power supply connected to the ink cartridge and used for applying a working voltage to all nozzles, and a second high-voltage power supply or a third high-voltage power supply connected to the control electrode by means of a high-voltage switch and used for applying a corresponding voltage to the control electrode. The control electrode controls the electric field distribution near the nozzles, and controls the electric field intensity borne by menisci at the tips of the nozzles, so as to achieve regulation between electric field force and surface tension, thus controlling independent jetting of each jet hole. Also disclosed is a jet control method.

IPC Classes  ?

• B41J 2/095 - Ink jet characterised by jet control for many-valued deflection electric field-control type

Abstract

Provided in the present invention is a flexible hybrid electronic system for intraoperative intracranial monitoring. The system comprises a flexible front-end signal collection module, a rear-end signal processing module and an upper computer system, wherein the flexible front-end signal collection module comprises a flexible framework body, which is formed by a top encapsulation layer, an intermediate encapsulation layer and a bottom substrate layer from top to bottom, an electroencephalogram layer and a flexible sensor array, which are arranged in the flexible framework body, and a temperature-controlled hydrogel interface layer and an electrothermal film, which are respectively integrated above and below the flexible framework body, the flexible sensor array being used for collecting pressure, temperature and brain tissue oxygen saturation signals, and the electrothermal film regulating the adhesion and peeling of the temperature-controlled hydrogel interface layer and brain tissue; and the rear-end signal processing module is electrically connected to the flexible front-end signal collection module, so as to receive signals collected by the flexible sensor array and the electroencephalogram layer, analyze and process the signals, and then transmit the signals to the upper computer system. The flexible hybrid electronic system can both replace traditional brain patties and monitor the state of brain tissue throughout the process, thereby ensuring intraoperative safety.

IPC Classes  ?

• A61B 17/02 - Surgical instruments, devices or methods for holding wounds open, e.g. retractorsTractors
• A61B 5/293 - Invasive

Abstract

The invention relates to a pixel grayscale modulation structure based on phase change materials, which has characteristics of a high grayscale level, a high light utilization rate, a fast response speed and a high resolution. It mainly includes n multi-layer phase change unit arrays in each sub-pixel, an upper all-dielectric filter structure, an all-dielectric intermediate cavity, a lower all-dielectric filter structure, a crossbar control structure, which is suitable for various display devices, including but not limited to electronic paper, projection devices, augmented reality/virtual reality equipment (AR/VR), vehicle display, mobile device display, and the like.

IPC Classes  ?

• G02F 1/03 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels or Kerr effect

Abstract

Disclosed is a preparation method for an ionic liquid/polymer composite film including uniformly mixing a base material with an unsaturated double bond-containing ionic liquid solution by a good solvent to obtain a casting solution, wherein the base material includes at least one of polybenzimidazole and a polybenzimidazole derivative; flatly laying the casting solution on a substrate, and drying to remove the solvent to obtain a solid film; and performing ionizing radiation on the solid film to generate polymerization/cross-linking by inducing induce the ionic liquid and entangle a polyionic liquid molecular chain with a polymer molecular chain in the base material to fix the ionic liquid in the base material to form a composite film. An ionic liquid/polymer composite film and an application thereof is also disclosed.

IPC Classes  ?

• H01M 50/406 - MouldingEmbossingCutting
• H01M 50/411 - Organic material
• H01M 50/414 - Synthetic resins, e.g. .thermoplastics or thermosetting resins
• H01M 50/431 - Inorganic material
• H01M 50/443 - Particulate material
• H01M 50/446 - Composite material consisting of a mixture of organic and inorganic materials

Abstract

A metasurface lens (2) for shaping a Gaussian beam into a collimated uniform beam, and a design method. The metasurface lens (2) comprises a dielectric substrate layer (203) and a metasurface microstructure. The metasurface microstructure comprises a first metasurface (201) and a second metasurface (202) which are respectively distributed on two sides of the dielectric substrate layer (203), and the first metasurface and the second metasurface each are formed by periodically arranging a plurality of columnar microstructure units. The distribution mode of the columnar microstructure units of the metasurface lens (2) is optimally designed on the basis of irradiance distribution of the Gaussian beam and a target collimated uniform beam, so that emergent beams are parallel to an optical axis and are uniformly distributed in a target range. The metasurface lens (2) implements laser shaping to obtain a target beam; and additionally, the structure is simple, the application range is wide, and the present invention is suitable for laser shaping of various lasers.

IPC Classes  ?

• G02B 3/02 - Simple or compound lenses with non-spherical faces

Abstract

The present disclosure provides a data collection method and apparatus, a computer device, and a storage medium. The method includes: determining, in response to a garbage collection request, respective first index entries from a first data table to be processed, first key data and storage location information in the first data table of a first key-value pair data corresponding to the first key data are stored in the first index entries; selecting valid target key data from the first key data according to current respective second data tables in the log-structured merge tree; reading target value data corresponding to the respective target key data in the first data table according to storage location information in the first index entries; constructing a new first data table according to the target key data and the target value data, and collecting the first data table to be processed.

IPC Classes  ?

• G06F 16/22 - IndexingData structures thereforStorage structures

Abstract

The present invention belongs to the technical field of medicine, and disclosed are a cinnamic acid derivative, a preparation method therefor, and a use thereof. The structural formula of the cinnamic acid derivative is as shown in Formula 1A or Formula 1B, the number of substituents R being 0 to 5; Rs at different substitution sites are independently selected from: fluorine, chlorine, bromine, iodine, trifluoromethyl, oxytrifluoromethyl, 2,3-phenyl, methyl, methoxy, ester, carboxyl, hydroxyl and allyloxy. The present invention, by means of improving the chemical structure of a cinnamic acid derivative and a preparation method therefor, designs a novel cinnamic acid derivative, which can be used to prepare a drug, for example, to have a therapeutic effect by means of inhibiting the MAPK signaling pathway, to exert a therapeutic effect by means of inhibiting ferroptosis, or to exert a detoxifying effect by means of activating UDP-glucuronosyltransferase, and in particular can be used to treat liver damage.

IPC Classes  ?

• C07H 13/04 - Compounds containing saccharide radicals esterified by carbonic acid or derivatives thereof, or by organic acids, e.g. phosphonic acids by carboxylic acids having the esterifying carboxyl radicals attached to acyclic carbon atoms
• C07H 15/04 - Acyclic radicals, not substituted by cyclic structures attached to an oxygen atom of a saccharide radical
• C07H 17/04 - Heterocyclic radicals containing only oxygen as ring hetero atoms
• A61K 31/7048 - Compounds having saccharide radicals and heterocyclic rings having oxygen as a ring hetero atom, e.g. leucoglucosan, hesperidin, erythromycin, nystatin
• A61P 1/16 - Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics

Abstract

The disclosure discloses a phase-locked loop optimization method and device for ultra-fast frequency support for power electronic converters, and belongs to the technical field of new energy power generation control. The disclosure adds a phase step link to the traditional phase-locked loop structure. When it is detected that the system frequency index exceeds the limit, a phase angle difference is instantly added to the phase-locked loop output angle, this enables the power electronic converter to quickly output power after the frequency drops, effectively improving the system frequency change rate and the frequency nadir. At the same time, the original phase-locked loop control structure is retained, which does not affect the design of the original phase-locked loop controller parameters and does not sacrifice the original dynamic performance of the phase-locked loop.

IPC Classes  ?

• H03L 7/085 - Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
• H02P 9/00 - Arrangements for controlling electric generators for the purpose of obtaining a desired output

Abstract

The present invention belongs to the field of optical measurements. Disclosed are a vectorial rotation measurement method and apparatus based on a multi-core optical fiber. A plurality of input light beams undergo non-uniform spatial transmission to form a structured scalar light field in a non-uniform spatial distribution; the scalar light field is used as detection light to irradiate rotationally moving particles in a collimated manner; the rotationally moving particles reflect signal light which carries movement information; Fourier analysis is performed on the signal light to obtain a Fourier magnitude spectrum and a Fourier phase spectrum; the magnitude of the velocity of the rotationally moving particles is calculated by means of the frequency peak in the Fourier magnitude spectrum; and calculation is performed by using a relative phase difference value corresponding to the Fourier phase spectrum, so as to infer the direction of the velocity of the rotationally moving particles, thereby realizing measurement which is performed on the vectorially rotationally moving particles on the basis of a multi-core optical fiber. The present invention breaks through the limitations of conventional solutions in which the magnitude and direction of a rotational movement velocity are subjected to vectorial measurement based on a scalar light field, and by means of an optical fiber assembly, detection light and signal light are transmitted on the same optical fiber, thereby improving the stability of a system.

IPC Classes  ?

• G01P 3/36 - Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
• G01P 13/04 - Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
• G01P 13/00 - Indicating or recording presence or absence of movementIndicating or recording of direction of movement

Abstract

An aging test apparatus and method for an electronic component under an arbitrary composite voltage waveform. The aging test apparatus comprises an upper computer, a signal generator, a power amplifier and a transformer, wherein the upper computer inputs an extracted composite voltage waveform into the signal generator; the signal generator outputs an arbitrary custom voltage waveform; the power amplifier increases an input signal power amplitude; and the transformer enlarges a voltage amplitude change range to ensure a threshold of test voltages applied to two ends of a sample, which is an electronic component. Environment conditions for a test are ensured in a constant temperature and humidity chamber. The decrease value of a component performance parameter is measured in different time periods, thereby exploring the influence on the aging of the electronic component under an arbitrary composite voltage waveform. The test apparatus is simple, and has a convenient measurement method and high operability, and is thus of great significance for the study on the influence of an arbitrary composite voltage waveform on the aging of an electronic component.

IPC Classes  ?

• G01R 31/00 - Arrangements for testing electric propertiesArrangements for locating electric faultsArrangements for electrical testing characterised by what is being tested not provided for elsewhere
• G01R 1/28 - Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform

Abstract

A fire smoke-detection method and detector based on particle shape characteristics for detecting particles in an optical dark chamber. An optical path angle between one blue light and one infrared light and a photoelectric conversion module is an acute angle, while an optical path angle between another blue light and the photoelectric conversion module is an obtuse angle. The detection method includes: starting a light source combination, calculating a change value between a current scattered light optical power and a background value of each light source, when the change value exceeds a set threshold, continuously starting the light source combination and constructing a space vector from the recorded change values, and using a classifier to classify a plurality of space vectors to obtain a plurality of classification results with categories including fire smoke and interfering aerosols; and counting the classification results to obtain the correct classification result.

IPC Classes  ?

• G01N 15/14 - Optical investigation techniques, e.g. flow cytometry
• G01N 15/00 - Investigating characteristics of particlesInvestigating permeability, pore-volume or surface-area of porous materials
• G01N 15/1429 - Signal processing

Abstract

Disclosed in the present invention are a method and apparatus for determining the current amplitude of a cable, and a processor. The method comprises: acquiring a target current waveform of a cable within a certain duration (S101); correcting an initial current frequency of the cable on the basis of a phase difference between current waveforms of the cable within two adjacent periods in the target current waveform, so as to obtain a target current frequency of the cable (S102); determining a first number for complete-period sampling points on the basis of the target current frequency and a sampling frequency (S103), wherein the sampling frequency is used for indicating a time interval for collecting a current value on the target current waveform; selecting a second number of sampling points from the target current waveform on the basis of a first number of complete-period sampling points and the sampling frequency (S104), wherein there is a multiple relationship between the first number and the second number, and the second number is greater than the first number; and determining the current amplitude of the cable on the basis of current values corresponding to the second number of sampling points (S105).

IPC Classes  ?

• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
• G01R 19/02 - Measuring effective values, i.e. root-mean-square values

Abstract

i is written into an array row; otherwise, the operation is returned as failed.

IPC Classes  ?

• G06F 16/13 - File access structures, e.g. distributed indices
• G06F 16/14 - Details of searching files based on file metadata

Abstract

A floating platform with multi-frequency adaptive vibration damping and an offshore wind power system. The floating platform includes a platform body. An internal space of the platform body is divided by partitions to form a plurality of independent compartments. The compartments are used to hold water to form tuned liquid dampers (TLDs), so that a vibration damping effect on the platform body is achieved through the sloshing of water. The compartments form multi-order TLDs. Setting parameters of water in the compartments corresponding to the TLDs of different orders are different. The multi-order TLDs correspond to multi-order vibration frequencies of the platform body.

IPC Classes  ?

• B63B 39/00 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude
• B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
• B63B 39/03 - Equipment to decrease pitch, roll, or like unwanted vessel movementsApparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids

Abstract

A method for parameter extraction of a sensitive probe and degree-of-freedom coupling calculation of a capacitive displacement sensor is provided. Through applying multiple groups of charge excitations to the mechanically sensitive probe with a multi-conductor structure, the electrostatic field distribution inside the sensitive probe under each group of excitation charges is obtained by numerical calculation to compute the electrostatic field energy, thereby finally extracting the complete distributed capacitance matrix of the sensitive probe. For the couplings among the multi-degree-of-freedom displacements caused by the sensitive probe, through establishing an indefinite admittance matrix of the sensitive probe and connecting the subsequent multi-channel sensing circuits, a complete equivalent circuit model for multi-degree-of-freedom coupling analysis is obtained to quantitatively calculated the degree-of-freedom coupling caused by displacement of the test mass.

IPC Classes  ?

• G01R 27/26 - Measuring inductance or capacitanceMeasuring quality factor, e.g. by using the resonance methodMeasuring loss factorMeasuring dielectric constants
• G01D 5/241 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes

Abstract

A method for acquiring a complex refractive index distribution morphology of a film, and a device. The method comprises: S101, collecting interferograms of a reference area and a sample under test; S102, on the basis of the obtained interferograms, by means of a recovery algorithm, determining a normalized light intensity image and an optical path difference image of said sample relative to the reference area; S103, establishing a measurement model on the basis of a reflective film transmission equation; S104, determining a relationship between a measured reflection coefficient and optical path difference of an area under test of said sample relative to the reference area and the measurement model; and S105, on the basis of the measured reflection coefficient and optical path difference of the area under test of the film relative to the reference area and the relationship, calculating a complex refractive index distribution morphology of the film under test. The method is used for solving the problem in the prior art of limitation of film interference and an extinction coefficient of an absorption material.

IPC Classes  ?

• G01N 21/45 - RefractivityPhase-affecting properties, e.g. optical path length using interferometric methodsRefractivityPhase-affecting properties, e.g. optical path length using Schlieren methods

Abstract

The disclosure provides a method and device for correction of the multi-channel capacitive sensor. The method includes: under calibrating mode, inputting the calibration signal from the calibration capacitance network module to the multi-channel capacitive sensor, and measuring the output complex voltage at each calibration frequency point; selecting any channel as a reference channel, combining each-channel three-admittance parameters with the output complex voltages at each calibration frequency point, calculating each-channel amplitude-phase correction coefficient relative to the reference channel; under operating mode, inputting a carrier signal to the multi-channel capacitive sensor through the multiple DoF sensitive probe, and measuring the output complex voltages under actual operation; and multiplying the output complex voltages by the correction coefficients, thereby obtaining the multiple sensing channel output signals.

IPC Classes  ?

• G01D 18/00 - Testing or calibrating apparatus or arrangements provided for in groups
• G01D 5/24 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance

Abstract

A method and a system for optimized scheduling of an integrated energy system are provide. The method includes: respectively obtaining marginal distribution functions of electricity price, hydrogen price, wind power, photovoltaic power, and load within a preset time period according to historical data to predict relevant parameters; adjusting a predicted value of the load based on a dynamic change in an unit electricity use consumption resource within the preset time period, and obtaining a load value after performing a demand response based on the electricity price to reduce a peak-valley difference of the load; considering decision-maker preferences, establishing an optimization scheduling model that simultaneously considers economic and environmental factors; converting the multi-objective model into a single-objective model and using the CPLEX solver to solve the model.

IPC Classes  ?

• H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks

Abstract

A high-temperature wide-bandgap power module and a preparation method thereof is provided in the present application. In the high-temperature wide-bandgap power module, SiC power chips are arranged in the cavity, and bonding wires are used to establish electrical connections. An ultrathin composite conformal coating consists of inorganic film and Parylene-HT film is arranged on the surface of the circuit to provide long-term reliable insulation while only imposing minor thermo-mechanical stresses on bonding joint at high-temperatures, which prolongs the module's life time. In addition, the hermetic sealing adopted in the present application blocks the external water, oxygen and chemical pollution, thereby alleviating the thermal degradation of the conformal coating and safeguards the internal circuit. Overall, the hermetic sealing and conformal coating ensure the long-term 250 degrees high-temperature working capability of the wide-bandgap power module.

IPC Classes  ?

• H01L 23/31 - Encapsulation, e.g. encapsulating layers, coatings characterised by the arrangement
• H01L 23/04 - ContainersSeals characterised by the shape
• H01L 23/29 - Encapsulation, e.g. encapsulating layers, coatings characterised by the material
• H01L 25/00 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices
• H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices the devices being of types provided for in two or more different main groups of the same subclass of , , , , or

Abstract

The present invention relates to the technical field of solar cells, and relates to a solar cell based on a core-shell structure charge transport layer and a preparation method therefor. The solar cell comprises a conductive substrate, and a porous charge transport layer, a porous spacer layer, and a porous back electrode layer which are sequentially deposited on the conductive substrate, wherein at least one of the porous charge transport layer, the porous spacer layer, and the porous back electrode layer is further filled with a photoactive material, and the porous charge transport layer is a porous film formed by a composite charge transport material having a core-shell structure. In the present invention, a common charge transport material is replaced with a composite structure of a porous core-shell charge transport layer for bulk phase conduction and surface charge extraction, so that efficient charge extraction at a perovskite interface can be realized, and efficient carrier transport in a bulk phase can be ensured. The use of some wide-bandgap materials, such as silicon dioxide, as an ultra-thin tunneling layer can further effectively passivate a surface defect, thereby suppressing interfacial carrier recombination without affecting charge extraction.

IPC Classes  ?

• H10K 30/85 - Layers having high electron mobility, e.g. electron-transporting layers or hole-blocking layers

Abstract

Disclosed in the present invention is a temporal information enhancement-based method for 3D medical image segmentation, belonging to the field of medical image segmentation. The method provides a circle transformer module for extraction and fusion of temporal information, and uses temporal input to improve the training effect of a deep learning model, thereby effectively eliminating interference of similar features and blurred images. In a training phase, an input sample is a temporal sequence, the model training effect is enhanced by extracting temporal information, and segmentation results before and after the combination of temporal information are both constrained, so that the model is no longer temporally dependent. In comparison with a training method in which a single sample is input, the present invention can improve the accuracy of an encoder-decoder structure-based segmentation model without costs. In an application phase, only a single frame of 3D image needs to be input, and no sequence needs to be used as an input, resulting in a more flexible application mode.

IPC Classes  ?

• G16H 30/40 - ICT specially adapted for the handling or processing of medical images for processing medical images, e.g. editing
• G06T 7/10 - SegmentationEdge detection
• G06T 9/00 - Image coding
• G06T 15/00 - 3D [Three Dimensional] image rendering
• G06V 10/25 - Determination of region of interest [ROI] or a volume of interest [VOI]
• G06V 10/44 - Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersectionsConnectivity analysis, e.g. of connected components

Abstract

A cache-designing method using cache lines to record cache-miss information is provided, wherein cache lines and cache-miss information are stored in a common storage space by means of shared storage. Tags of cache lines, as well as cache lines and cache-miss information, are stored separately in different static random-access memories, wherein multiple independent memories are used for tags, while a single memory is for cache lines and cache-miss information. A request-processing pipeline and a response-processing pipeline are constructed to be parallelable and used respectively for processing memory-access requests and for processing memory-response data. As compared to existing non-blocking cache designs that support plenty of miss status holding registers, the present disclosure allows storage sharing between cache data and cache-miss information, and leverages dual-port feature of static random-access memories in FPGA, so as to design separate pipelines to achieve memory access respectively for memory-access request processing and for memory-response data processing.

IPC Classes  ?

• G06F 12/0802 - Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches

Abstract

Provided is a double-stranded RNA delivery vector, comprising the extracellular protein domain of a specific double-stranded RNA-binding protein SID-1 of Caenorhabditis elegans and a GPCR ligand having strong targeting capability and cell specificity. The vector can specifically bind a double-stranded RNA without being affected by DNAs, is independent of sequences, has a relatively high broad spectrum property and does not need artificial screening of RNA fragments, thereby greatly shortening the time for determining druggability. In addition, the combined GPCR ligand solves the problem of poor targeting capability and the problem of being incomprehensive; furthermore, cell-specific GPCRs all have a very strong endocytosis effect, thus ensuring that the SID-1 extracellular domain bound with the RNA can be endocytosed by cells so as to achieve drug effects.

IPC Classes  ?

• A61K 47/64 - Drug-peptide, drug-protein or drug-polyamino acid conjugates, i.e. the modifying agent being a peptide, protein or polyamino acid which is covalently bonded or complexed to a therapeutically active agent
• A61K 31/713 - Double-stranded nucleic acids or oligonucleotides

Abstract

Provided in the present invention are a powder feeding control method and system for a small powder bin. The method comprises: step 1, acquiring a boiler load rise signal, and on the basis of the boiler load rise signal, determining an objective function F(t) for boiler load control, wherein t is a time sequence; step 2, acquiring a current output signal B(t) of a coal mill, wherein B(t) is a time-varying fuel quantity signal of an outlet of the coal mill starting from a start time; step 3, comparing B(t) with F(t): if B(t) cannot meet the fuel quantity requirement of F(t), executing steps 4 and 5, such that a small powder bin connected to a boiler starts to operate, and otherwise, the small powder bin not operating; step 4, determining a powder feeding signal f(t) of the small powder bin on the basis of the difference between F(t) and B(t), and further determining a powder feeding control signal f'(t) of the small powder bin; and step 5, on the basis of the powder feeding control signal f'(t) of the small powder bin, controlling the small powder bin to feed powder to the boiler, so as to quickly change the combustion rate inside a hearth, thereby improving the load of the boiler.

IPC Classes  ?

• F23N 1/10 - Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught

Abstract

The present invention provides a coal feeding control method and system for a small pulverized coal silo, the method includes: acquiring a boiler load increase signal, and determining the target function F(t) for boiler load control obtaining the current coal mill output signal B(t), where B(t) is the fuel quantity signal at the outlet of the coal mill that changes over time from the start time; comparing B(t) with F(t): if B(t) cannot meet the fuel quantity requirements of F(t), activate the small pulverized coal silo connected to the boiler; otherwise, the small pulverized coal silo remains inactive; determining the coal feeding signal f(t) for the small pulverized coal silo, and further determining the coal feeding control signal f(t) for the small pulverized coal silo; controlling the small pulverized coal silo to feed coal to the boiler, quickly changing the combustion rate in the furnace, and increasing the boiler load.

IPC Classes  ?

• F23K 3/00 - Feeding or distributing of lump or pulverulent fuel to combustion apparatus
• B02C 25/00 - Control arrangements specially adapted for crushing or disintegrating

Abstract

Disclosed is a memory array testing system based on FPGA, which is used to test a memory that has not been packaged and has not had peripheral circuits added, comprising: an FPGA, which serves as a control module for the entire testing system; an excitation source, which is used to output an operating voltage for a memory cell; a read circuit, which is used to read the resistance value of a selected memory cell; an array gating module, comprising a row gating circuit and a column gating circuit, and used to select a single memory cell in an array; an upper computer, which is used to, according to a user operation, output a pulse width and amplitude of a pulse voltage, a step time, step voltage and number of scanning points of a scanning voltage, and a control signal of a word line and a bit line of a selected memory cell, and present the resistance data received from FPGA in the form of a chart. The present invention constructs a test circuit on a PCB, effectively reducing testing time and improving testing efficiency compared with traditional probe tests, and performs prototype verification before constructing a peripheral integrated circuit for a memory array.

IPC Classes  ?

• G11C 29/56 - External testing equipment for static stores, e.g. automatic test equipment [ATE]Interfaces therefor

Abstract

aI, ARI, and CI; and delineating three aging stages of SBS-modified asphalt, including a polymer swelling stage, a polymer degradation stage and a component imbalance stage according to changes of functional group indexes. According to the present disclosure, the actual aging stages of the SBS-modified asphalt can be determined rapidly and accurately, providing a reasonable basis for the decision on pavement maintenance timing and mode.

IPC Classes  ?

• G01N 21/35 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
• G01N 21/3563 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solidsPreparation of samples therefor
• G01N 21/3577 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water

Abstract

The invention discloses a method for obtaining the complex refractive index distribution profile of a film. S101, the interference image of the reference area and the sample under test is collected; S102, the normalized light intensity map and the optical path difference of the sample under test relative to the reference area is determined through the recovery algorithm based on the obtained interference image; S103, the measurement model is established based on the reflective film transmission matrix model; S104, the relationship between the measured reflection coefficient and optical path difference of the area under test of the sample under test relative to the reference area and the measurement model is determined; S105, the complex refractive index distribution profile of the film under test is calculated based on the measured reflection coefficient and optical path difference of the area under test of the film relative to the reference area and the relationship.

IPC Classes  ?

• G02B 21/36 - Microscopes arranged for photographic purposes or projection purposes
• G02B 21/06 - Means for illuminating specimen
• G02B 21/26 - StagesAdjusting means therefor

Abstract

The invention discloses a three-dimensional 1S1C memory based on a ring capacitor and a preparation method. The memory includes: a horizontal peripheral electrode layer including a first dielectric layer and a first metal electrode layer alternately stacked and grown on a substrate and provided with trenches penetrating in a vertical direction and holes penetrating in the vertical direction, a vertical functional layer, and a capacitive dielectric layer. An annular groove is disposed outside each hole. The annular groove surrounds the holes and vertically cuts off the peripheral electrode layer. The annular groove is evenly filled with a capacitive dielectric layer. A top of the second metal electrode layer is extended to a surface of a topmost first dielectric layer to form a bit line electrode and is connected to a bit line. A region where the second metal electrode layer faces the first metal electrode layer forms a memory cell.

IPC Classes  ?

• H10D 1/68 - Capacitors having no potential barriers
• H10B 41/27 - Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by three-dimensional arrangements, e.g. with cells on different height levels with source and drain on different levels, e.g. with sloping channels the channels comprising vertical portions, e.g. U-shaped channels
• H10B 41/30 - Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the memory core region
• H10B 41/40 - Electrically erasable-and-programmable ROM [EEPROM] devices comprising floating gates characterised by the peripheral circuit region

Abstract

The present invention relates to the related technical field of surface three-dimensional topography measurement. Disclosed are a stacked piece curved surface deformation measuring device based on a multi-contact micro-mirror and a method. The measuring device comprises a light source, an array mask, a light splitter, a reflecting mirror, a multi-contact micro-mirror, and a camera. The light splitter is arranged behind the light source, the array mask is arranged between the light splitter and the light source, the reflecting mirror and the multi-contact micro-mirror are both arranged behind the light splitter, and stacked pieces to be measured are arranged behind the multi-contact micro-mirror. The array mask is used for dividing, according to the distribution of a mask array, light emitted by the light source into multiple beams of parallel incident light, and one beam of light is used for measuring the curved surface deformation of a single stacked piece. A plurality of micro-mirrors are arranged at the front end of the multi-contact micro-mirror, and in the measurement process, a single micro-mirror extends into the position between adjacent stacked pieces to be measured for measurement. By means of the present invention, the problem of simultaneous measurement of curved surface deformation of the surfaces of a plurality of stacked pieces among stacked pieces is solved.

IPC Classes  ?

• G01B 11/16 - Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge

Abstract

xxx material; and the first metal layer is grounded, a positive voltage and a negative voltage are applied to the second metal layer, an output current when the negative voltage is applied to the second metal layer being greater than an output current when the positive voltage with the same magnitude is applied to the second metal layer, thus achieving a self-rectification effect; and when the voltages with the same magnitude are applied to the second metal layer, the output current increasing with the rise of temperature. The device and the array have simpler structures and higher integration levels, are more easily implemented in industry and applied in small-size sensing systems, and can effectively ameliorate the problems, such as high power consumption and high latency, that are caused by redundant data transmission.

IPC Classes  ?

• H10N 70/20 - Multistable switching devices, e.g. memristors
• H10N 70/00 - Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
• H10N 79/00 - Integrated devices, or assemblies of multiple devices, comprising at least one solid-state element covered by group

Abstract

2O].

IPC Classes  ?

• C02F 1/469 - Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
• B01D 61/42 - ElectrodialysisElectro-osmosis
• C02F 101/10 - Inorganic compounds
• C25B 9/40 - Cells or assemblies of cells comprising electrodes made of particlesAssemblies of constructional parts thereof

Abstract

222 and p-CuO; when the heterojunction memristor is an analog memristor, the heterojunction memristor exhibits a multi-value resistance change performance on the basis of charge capture and release, and also exhibits a self-rectification characteristic without requiring a selector, thereby facilitating large-scale integration; and when the heterojunction memristor is a digital memristor, due to the presence of Ag/Cu ions in a layer, the formation of Ag/Cu conductive wires is facilitated, and the conversion threshold voltage is relatively low, thereby achieving the advantages of the switching speed being high and the switching power consumption being low. In the present invention, a PN heterojunction device for an N-type oxide layer and a P-type oxide layer implements analog-digital reconfigurability between a self-rectification analog device and a digital device by means of electrochemical principles; and the heterojunction device has a simple structure, is suitable for various forms of in-memory computing, and has wide application prospects.

IPC Classes  ?

• H10N 70/20 - Multistable switching devices, e.g. memristors
• H10B 63/00 - Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
• G11C 11/54 - Digital stores characterised by the use of particular electric or magnetic storage elementsStorage elements therefor using elements simulating biological cells, e.g. neuron

Abstract

x material; the first metal layer is grounded, and positive and negative voltages are applied to the second metal layer; in which an output current when the negative voltage is applied to the second metal layer is greater than an output current when the positive voltage of the same magnitude is applied to the second metal layer, and there is a self-rectifying effect; when the voltage of the same magnitude is applied to the second metal layer, the output current increases as a temperature increases.

IPC Classes  ?

• H10N 70/20 - Multistable switching devices, e.g. memristors
• H10B 63/00 - Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
• H10N 70/00 - Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching

Abstract

A glycosylation method involving a trivalent iodine reagent, wherein a glycosyl donor (I) is activated in the presence of a trivalent iodine reagent and a transition metal catalyst, and then reacts with a acceptor (II) under acid catalysis or directly to obtain a glycosylation product (III); in the glycosyl donor (I), Gly is a glycosyl group in which one or more hydroxyl groups on the sugar ring are protected by a protecting group; X is an oxygen, sulfur, or selenium atom; R is an alkyl group or an aryl group; the acceptor (II) is a nucleophile selected from sugars, alcohols, phenols, flavonoids, carboxylic acids, phosphates, pyrimidines, purines, amides, sulfonamides, guanidines, arylamines, indoles, enol silyl ethers, thiols, or thiophenol containing one or more free hydroxyl groups.

IPC Classes  ?

• C07H 1/00 - Processes for the preparation of sugar derivatives
• C07H 15/04 - Acyclic radicals, not substituted by cyclic structures attached to an oxygen atom of a saccharide radical
• C07H 15/12 - Acyclic radicals, not substituted by cyclic structures attached to a nitrogen atom of a saccharide radical
• C07H 15/14 - Acyclic radicals, not substituted by cyclic structures attached to a sulfur, selenium or tellurium atom of a saccharide radical
• C07H 15/18 - Acyclic radicals, substituted by carbocyclic rings
• C07H 15/207 - Cyclohexane rings not substituted by nitrogen atoms, e.g. kasugamycins
• C07H 17/07 - Benzo[b]pyran-4-ones
• C07H 19/04 - Heterocyclic radicals containing only nitrogen as ring hetero atom
• C07H 19/052 - Imidazole radicals
• C07H 19/06 - Pyrimidine radicals
• C07H 19/16 - Purine radicals
• C07H 19/23 - Heterocyclic radicals containing two or more heterocyclic rings condensed among themselves or condensed with a common carbocyclic ring system, not provided for in groups

Abstract

The disclosure relates to the field of micro-nano structure-enhanced heat transfer surfaces and provides a 3D printing-assisted multi-scale metal three-dimensional surface structure preparation method and product. The method includes the following steps. A micron-level and highly-precise three-dimensional structure mask is prepared through a 3D printing technology, the hollow portion of mask is matched with the target structure model. Material conversion is performed on a metal matrix fixed with the mask, and a target metal is obtained. Herein, the metal matrix is machined first, and a surface of the target metal is matched with the structure model. In the preparation method provided in the disclosed embodiment, the precision of the metal structure is improved by improving the precision of the template. The multi-scale and multi-material heat exchange structure with micron-level precision and a complex structure is prepared on the metal surface to improve the heat exchange efficiency of phase change

IPC Classes  ?

• B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing
• C23C 16/04 - Coating on selected surface areas, e.g. using masks

Abstract

The invention relates to a mutant of a small molecule chaperone protein MOG1-encoding gene and a use thereof, belonging to the technical field of biomedicine. The invention uses a mutant of a small molecule chaperone protein MOG1-encoding gene and a mutant of a small molecule chaperone protein MOG to prepare a use for treatment of diseases such as Brugda syndrome, arrhythmia, dilated cardiomyopathy, or heart failure. The mutant of the invention is more effective than a wild-type MOG1 in enhancing myocardial sodium current.

IPC Classes  ?

• C07K 14/47 - Peptides having more than 20 amino acidsGastrinsSomatostatinsMelanotropinsDerivatives thereof from animalsPeptides having more than 20 amino acidsGastrinsSomatostatinsMelanotropinsDerivatives thereof from humans from vertebrates from mammals
• A61K 38/00 - Medicinal preparations containing peptides
• A61P 9/00 - Drugs for disorders of the cardiovascular system

Abstract

The present invention relates to the field of computer numerical control machine tools. Provided are a universal motion simulation method and universal collision detection method for five-axis computer numerical control machine tools. In the present invention, five-axis machine tools of any structure can be processed by using the same numerical control program processing method, thus avoiding the use of different numerical control program processing methods in respect of five-axis machine tools of different structures and the development of simulation software which can only be used for five-axis machine tools of a certain model, and effectively improving the universality and efficiency of motion simulation and collision detection for five-axis computer numerical control machine tools.

IPC Classes  ?

• G05B 19/401 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes

Abstract

The present disclosure relates to a system and method for vulnerability localization based on deep learning, which comprises, at a minimum, a processor configured to: analyze a code file under detection to obtain a first abstract syntax tree devoid of semantic information; build upon the first abstract syntax tree by incorporating data-flow edges and/or control-flow edges, thereby forming a second abstract syntax tree with semantic-flow enhancement; split the second abstract syntax tree to obtain a plurality of second abstract syntax sub-trees; and input these second abstract syntax sub-trees into a pre-established vulnerability detection and localization model. Compared with existing code vulnerability detection methods, the present disclosure employs a semantically-enhanced abstract syntax tree and finely-grained segmentation thereof, enabling both the efficient detection and accurate localization of code vulnerabilities, characterized by swift detection rates, low false positive rates, and commendable interpretability of the detection results.

IPC Classes  ?

• G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
• G06F 21/56 - Computer malware detection or handling, e.g. anti-virus arrangements

Abstract

Disclosed are a method and a system for correlating hydro-turbine governing system control parameters and oscillation characteristics, and the method includes the steps: calculating a eigenvalue, a zero point and a pole of a state matrix in a hydro-turbine governing system state space model, taking a pole which is the closest to the imaginary axis and has no zero point in a preset distance as a dominant eigenvalue; determining an oscillation characteristic region of the hydro-turbine governing system on the complex plane according to the dominant eigenvalue; obtaining a system control parameter stability domain according to a Hurwitz stability criterion; and calculating dominant eigenvalues corresponding to different control parameters, classifying the control parameters according to an oscillation characteristic region of a complex plane where the dominant eigenvalue is located, and dividing the oscillation characteristic region in a system control parameter stability domain.

IPC Classes  ?

• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
• H02P 101/10 - Special adaptation of control arrangements for generators for water-driven turbines

Abstract

A geologically constrained infrared imaging detection system for an urban street deeply-buried strip-like passage includes an urban hierarchical three-dimensional temperature field model establishing module for establishing an urban hierarchical three-dimensional temperature field model according to urban street digital elevation model (DEM) data and geological data corresponding to urban streets; a total solar radiation energy calculating module for using a total solar radiation energy distribution model to calculate urban surface total solar radiation energy on the basis of the DEM data; an urban stratum geological background heat flux calculating module for calculating urban stratum geological background heat flux via the urban hierarchical three-dimensional temperature field model; an image filtering module; and a perturbation signal processing module.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
• G06T 7/70 - Determining position or orientation of objects or cameras
• G06T 17/05 - Geographic models
• G06V 10/44 - Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersectionsConnectivity analysis, e.g. of connected components

Abstract

Described are a carbon-iodine conjugated polymer and preparation thereof, an imaging marker thereof, and uses thereof for preparing a localization marker, and belongs to the technical field of imaging markers. The conjugated structure enables the polymer to have strong absorption in a visible light region, and high iodine content of up to 84.1% corresponds to the strong imaging ability thereof. During surgery, on the basis of the dual guidance of a polymer-based image marker and naked eye observation, the marker can better facilitate determination of tumor resection margins, achieving precise resection of tumors and minimizing damage to surrounding normal tissues. During cyberknife-based treatment, the polymer can replace clinical gold markers to provide ray marker guidance. Absence of metal artifacts improves ray imaging quality and the accuracy of radiation dose distribution, good biocompatibility enhances the stability of the relative position of the marker, and radiotherapy side effects can be further reduced.

IPC Classes  ?

• C08G 61/04 - Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms
• A61K 49/04 - X-ray contrast preparations

Abstract

The disclosure belongs to the technical field related to additive manufacturing model preprocessing, and discloses a field-based additive manufacturing digital model feature identification and extraction method and device, the method can convert the digital model represented by the facet into a signed distance field and introduce a simulated physical field of the forming/service simulation, the feature distance field after the frequency domain analysis filtering, and the geometric feature field obtained by the multi-precision convolution unit analysis according to the requirement of feature to be identified, then, multiple fields are combined to realize feature classification determination and labeling of features, and finally feature extraction is completed based on field data and isosurface and isoline reconstruction algorithms.

IPC Classes  ?

• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
• B29C 64/386 - Data acquisition or data processing for additive manufacturing
• B33Y 50/00 - Data acquisition or data processing for additive manufacturing
• G06F 30/17 - Mechanical parametric or variational design
• G06F 113/10 - Additive manufacturing, e.g. 3D printing

Abstract

x1-x1-yyzz, wherein the element M is at least one of In, Ga, Al, and Zn, 0.1≤x≤0.9, 0.02≤y≤0.15, and 0≤z≤0.2. According to the gate transistor material and the preparation method therefor, and the gate transistor unit, the problems of safety of material selection and stability of existing gate transistors are solved. Moreover, the gate transistor device prepared from the Se-based gate transistor material has adjustable threshold voltage and better comprehensive performance.

IPC Classes  ?

• H10N 70/00 - Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
• H10N 70/20 - Multistable switching devices, e.g. memristors

Abstract

The disclosure provides a frequency support method, device and wind farm for a wind farm and belongs to the technical field of new energy power generation and grid connection. In the frequency support method, a state that can reflect a frequency modulation capability of a wind turbine is designed, measured, and recorded as a consistency factor of frequency modulation. Each wind turbine is controlled to exchange the consistency factors with two adjacent wind turbines. Each wind turbine combines its own consistency factors with the consistency factors of two adjacent wind turbines to generate consistent added power through a PI link and adjusts real-time frequency modulation output based on the consistency added power. In this way, the states of the wind turbines in the wind farm are similar during the frequency support process, so that a reasonable distribution of frequency support power is achieved.

IPC Classes  ?

• F03D 7/02 - Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
• F03D 7/04 - Automatic controlRegulation
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers

Abstract

The present invention relates to the technical field of artificial neuromorphology, and provides a temperature-sensing artificial neuron system based on a chalcogenide threshold switching device. The system comprises a resistor, a chalcogenide threshold switching device, and a capacitor. The chalcogenide threshold switching device is used for realizing switching between a high-resistance state and a low-resistance state under different excitations; wherein, on the basis of the characteristic that a threshold voltage of the chalcogenide threshold switching device decreases along with an increase of temperature, and that then the amplitude of a pulse signal decreases and the frequency of periodic oscillation increases, a change in the threshold voltage serves as a response which allows a temperature signal to be sensed. An excitation input end is used for providing an excitation for the capacitor, to control the capacitor to discharge by means of the chalcogenide threshold switching device, or to control the capacitor to be charged by means of the resistor. The temperature-sensing artificial neuron system in the present invention can convert a temperature signal into a pulse signal without additionally incorporating a temperature sensor, has a compact structure, a simple circuit structure, small leakage current and low power consumption, and is conducive to large-scale integration.

IPC Classes  ?

• G01K 13/00 - Thermometers specially adapted for specific purposes
• G01K 1/00 - Details of thermometers not specially adapted for particular types of thermometer
• G06N 3/063 - Physical realisation, i.e. hardware implementation of neural networks, neurons or parts of neurons using electronic means

Abstract

A cascade-based power dissipation optimization method and system for an amplification circuit are provided. The method includes: S1, acquiring a relationship of power dissipation of an amplification circuit to input signal amplitudes and voltage gains by means of statistical analysis; and S2, designing an optimal cascade strategy for the amplification circuit according to the relationship of the power dissipation of the amplification circuit to the input signal amplitudes and the voltage gains, and adjusting the number of stages of the amplification circuit and a voltage gain of each stage of the amplification circuit so as to minimize total power dissipation of the amplification circuit.

IPC Classes  ?

• G06F 30/373 - Design optimisation

Abstract

A holographic wavefront printing system and method are provided. A two-dimension digital blazed grating is loaded on a phase hologram, and the emergent direction of active region diffracted light is adjusted to prevent overlapping with the dead region diffracted light after being Fourier transformed by a lens, and a phase spatial light modulator is inclined by a preset angle to change the emergent direction of the diffracted light, such that the dead region zeroth-order and first-order diffracted light on a focusing surface are symmetrical with respect to a main optical axis of a first lens, the frequency spectrum center of active region zeroth-order diffracted light is then loaded to the original frequency spectrum center without information change. In this way, the adverse effects of the dead region diffracted light and active region high-order diffracted light of the phase spatial light modulator on holographic wavefront printing are eliminated.

IPC Classes  ?

• G03H 1/02 - Holographic processes or apparatus using light, infrared, or ultraviolet waves for obtaining holograms or for obtaining an image from themDetails peculiar thereto Details
• G03H 1/04 - Processes or apparatus for producing holograms
• G03H 1/16 - Processes or apparatus for producing holograms using Fourier transform
• G03H 1/30 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique discrete holograms only

Abstract

Disclosed are a vectorial rotation velocity measurement method and device based on multi-core fiber, which belongs to the field of optical measurement. Input multiple lights are transmitted through a non-uniformly distributed space to form a structured non-uniform spatially-distributed scalar light field, wherein the scalar light field serves as a collimated probe light to illuminate rotationally moving particles, the rotationally moving particles reflect a signal light carrying motion information, the signal light is subjected to a Fourier analysis to obtain a Fourier amplitude spectrum and a Fourier phase spectrum, a velocity of the rotationally moving particles is calculated through a frequency peak in the Fourier amplitude spectrum, and a direction of the velocity of the rotationally moving particles is calculated using a relative phase difference value corresponding to the Fourier phase spectrum, thereby realizing a measurement of vectorial rotationally moving particles based on the multi-core fiber.

IPC Classes  ?

• G01S 17/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
• G01S 7/481 - Constructional features, e.g. arrangements of optical elements
• G01S 7/4915 - Time delay measurement, e.g. operational details for pixel componentsPhase measurement

Abstract

2 and p-CuO. In the analog type, multiple resistance state performance is exhibited based on charge trapping and releasing, and self-rectification characteristics are exhibited, without the need for a selector, which facilitates large-scale integration; in the digital type, the presence of Ag/Cu ions in the layer helps to form Ag/Cu conductive filaments, the switching threshold voltage is small, and the advantages of fast switching speed and low switching power consumption are provided. The disclosure realizes a PN heterojunction device of an N-type oxide layer and a P-type oxide layer through electrochemical principles, and is analog type-digital type reconfigurable between a self-rectifying analog type device and a digital type device.

IPC Classes  ?

• H10N 70/20 - Multistable switching devices, e.g. memristors
• G11C 13/00 - Digital stores characterised by the use of storage elements not covered by groups , , or
• G11C 27/00 - Electric analogue stores, e.g. for storing instantaneous values
• H10B 63/00 - Resistance change memory devices, e.g. resistive RAM [ReRAM] devices
• H10N 70/00 - Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching

Abstract

The disclosure provides a method and system for trajectory tracking control of a vehicle-manipulator coupling system with finite time prescribed performance. Specifically, the trajectory tracking error of the vehicle-manipulator coupling system is obtained. A finite time performance function is designed to constrain the trajectory tracking error. In a case the constraint conditions corresponding to the finite time performance function are satisfied, the trajectory tracking error is converted to obtain a transformed error. The sliding mode surface is designed based on the transformed error to control the transformed error to converge in a finite time, and the external disturbance of the vehicle-manipulator coupling system is observed based on non-linear disturbance observer. The control input of the vehicle-manipulator coupling system is designed based on the sliding mode surface and the non-linear disturbance observer output. This ensures that the vehicle-manipulator coupling system can be controlled to operate precisely along the desired trajectory.

IPC Classes  ?

• G05D 1/689 - Pointing payloads towards fixed or moving targets
• G05D 109/30 - Water vehicles

Abstract

The disclosure provides a convolution operation accelerator and a convolution operation method and belongs to the field of microelectronic devices. Input data of each word line may be subjected to a multiply-accumulate operation together with two upper and lower layers of convolution kernel units, so that natural sliding of the convolution kernel units in a y direction in two-dimensional input is achieved. The oblique bit lines and multiple copies of a convolution kernel in each layer of a non-volatile memory array may enable a multiplication operation between one piece of input data and convolution kernel data at different positions in the same convolution kernel. In this way, the natural sliding of the convolution kernel units in an x direction in the two-dimensional input is achieved.

IPC Classes  ?

• G11C 5/02 - Disposition of storage elements, e.g. in the form of a matrix array
• G06N 3/0464 - Convolutional networks [CNN, ConvNet]
• G11C 5/06 - Arrangements for interconnecting storage elements electrically, e.g. by wiring
• G06N 3/045 - Combinations of networks
• G06N 3/063 - Physical realisation, i.e. hardware implementation of neural networks, neurons or parts of neurons using electronic means

Abstract

The disclosure provides a method and a system for calculating a stability margin domain of the control parameters of a hydraulic turbine regulating system, which belongs to the technical field of stability margin analysis of the hydraulic turbine regulating system. The method includes: determining a high-order state space model of the hydraulic turbine regulating system; determining a dominant eigenvalue and an interference eigenvalue of a state matrix of the high-order state space model; determining an associated state variable of the interference eigenvalue; determining the interference eigenvalues under different target control parameter conditions; determining whether a target control parameter meets a stability margin requirement; and determining the stability margin domain of the control parameter. The present disclosure can accurately calculate the stability margin domain of the complex hydraulic turbine system and help operators quickly identify the control parameters adjustment range meeting adjustment and attenuation requirements of the system.

IPC Classes  ?

• F03B 15/12 - Regulating, i.e. acting automatically by speed, e.g. by measuring electric frequency or liquid flow with retroactive action

Abstract

The present invention relates to the field of network security. Disclosed are a provenance graph-oriented host-based intrusion detection method and system, and a storage medium. The method comprises: S1, collecting provenance data of a host to be detected, so as to construct a provenance graph representing a user behavior; S2, mapping nodes in the provenance graph into roles, constructing a node feature matrix of which feature vectors are used for representing attribute features and structural features of the nodes in the provenance graph and an interaction relationship between the nodes, and mapping the nodes having similar feature vectors into the same role; S3, performing attention-based attributed and temporal random walk in comprehensive consideration of the attributes of the nodes in the provenance graph, a temporal relationship between edges of the nodes, and attention parameters between different roles; and S4, converting an obtained attributed and temporal random walk sequence into an embedded vector to extract a feature of the provenance graph, and performing intrusion anomaly detection. The present invention can implement deep representation learning on provenance data, reduce the workload of detection model training, and improve the accuracy and efficiency of intrusion detection.

IPC Classes  ?

• H04L 9/40 - Network security protocols

Abstract

A method, system and processor for enhancing robustness of a source-code classification model based on invariant features is provided, wherein the method includes: combining non-robustness features to generate different style templates, converting codes in an input code training set into new codes of different styles to obtain a converted-code training set, merging the input-code and the converted-code training set into an expanded training set, and converting code texts in the expanded training set into code images; and converting the code images into required vectors, pairing samples of identical class randomly picked from the expanded training set and inputting the matched sample pairs into a feature extractor, iteratively updating the feature extractor and the matched sample pairs and extracting target characteristics, and training the extracted invariant features in a classifier to produce a trained model. The disclosed system includes a training set-expanding module and a model-training module.

IPC Classes  ?

• G06F 8/73 - Program documentation
• G06V 10/764 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects

Abstract

Disclosed are free-form curved surface slicing method and device based on implicit model, includes following: (1) Using mesh model of layered curved surface to intersect with implicit model of a part to be manufactured to obtain contour lines; (2) Comparing rules for intersecting contour lines and meshes within mesh, mesh coordinates are substituted into implicit model, obtaining a position of an intersection point of contour lines in corresponding mesh; (3) Using interpolation method to calculate intersection coordinates of contour lines and mesh boundary, specifying storing sequence of interpolation points, storing intersection points of discrete line segments in mesh; (4) Merging unordered point sets obtained to establish topological relationship between point sets and discrete line segments, each line segment corresponds to two endpoints, each endpoint corresponds to two line segments, based on above, all points traversed will be connected into complete and ordered profile, that is sliced profile.

IPC Classes  ?

• G06T 17/20 - Wire-frame description, e.g. polygonalisation or tessellation
• B33Y 50/00 - Data acquisition or data processing for additive manufacturing

Abstract

The present invention discloses a provenance graph-oriented host intrusion detection method and system, and a storage medium, which relates to the field of cyber security. The method includes: S1, acquiring provenance data of a host to be tested, to construct a provenance graph representing user behaviors; S2, mapping nodes in the provenance graph to roles, constructing a node feature matrix composed of feature vectors which can be used to represent attribute features, structural features, and inter-node interactive relationship of the nodes in the provenance graph, and mapping nodes having similar feature vectors to the same role; S3, performing an attention-guided attribute temporal random walk by comprehensively considering attributes of the nodes in the provenance graph, the temporal relationship between edges, and an attention parameter between different roles; and S4, converting the acquired attribute temporal random walk sequence into an embedding vector to extract a feature of the provenance graph, and performing intrusion anomaly detection. The present invention can perform deep representation learning on provenance data, reduce the workload of training a detection model, and improve the accuracy and efficiency of intrusion detection.

IPC Classes  ?

• G06F 21/55 - Detecting local intrusion or implementing counter-measures

Abstract

Disclosed are a method for processing and recycling an ultrathin lithium foil and a product, which belongs to the field of lithium-ion batteries. According to the disclosure, a liquid-phase thinning agent is adopted to perform a contact reaction with a lithium metal, the fabricated ultrathin lithium foil has a thickness of 20 μm or less, the surface is flat, the thickness can be randomly regulated, and the uniformity is good. The method of the disclosure can also recycle a lithium-containing byproduct generated in the preparation process. When the ultrathin metal lithium foil prepared by the disclosure is used as a metal lithium negative electrode of a lithium battery, the energy density of the battery can be improved, and the battery manufacturing cost is reduced. The ultrathin metal lithium foil can also be used to supplement lithium for other types of electrode materials, thereby a broad application prospect is achieved.

IPC Classes  ?

• C23F 1/14 - Aqueous compositions
• C01D 7/06 - Preparation via sodium or potassium magnesium carbonate
• C01D 15/08 - CarbonatesBicarbonates
• C22B 3/20 - Treatment or purification of solutions, e.g. obtained by leaching
• C22B 26/12 - Obtaining lithium
• H01M 4/1395 - Processes of manufacture of electrodes based on metals, Si or alloys
• H01M 4/02 - Electrodes composed of, or comprising, active material
• H01M 4/134 - Electrodes based on metals, Si or alloys

Abstract

x1-x1-x, wherein 2%

IPC Classes  ?

• H10N 70/00 - Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching

Abstract

ii, i=1, ..., K, i≠u}, N is the number of dimensions of the interfered user channel space, and [formula 2] represents channel state information of an i-th terminal user, M is the total number of antennas on a network device side, K is the total number of terminal users that perform communications, and M≥K; capturing the first M-N rows of a matrix UHuuuu represents channel state information of a u-th terminal user, and the superscript H represents conjugate transposition; capturing the first M-N rows and the first M-N columns of a matrix UHZU, so as to obtain a matrix Ξ, wherein [formula 4], a matrix [formula 5], and an element in Z represents a coupling coefficient of any two antennas; and performing calculation to obtain a precoding matrix [formula 6] of the u-th terminal user, wherein [formula 7]. The spectral efficiency and capacity of a system can be significantly improved, thereby meeting the increasing communication requirements.

IPC Classes  ?

• H04B 7/0456 - Selection of precoding matrices or codebooks, e.g. using matrices for antenna weighting

Abstract

The disclosure provides a quasi-dynamic in situ ellipsometry method and system for measuring a photoresist exposure process. The method includes: obtaining a measured Muller matrix of a photoresist at different exposure times by a Muller matrix ellipsometer; building a forward optical model of the photoresist and obtaining a theoretical Mueller matrix; inverting and fitting the measured Mueller matrix and the theoretical Mueller matrix and obtaining ellipsometric parameters of the photoresist at different times, an average extinction coefficient, and a film thickness; building a relational model of a Dill parameter of the photoresist and optical properties of the photoresist, and an exposure model of the photoresist; building a relational model of a theoretical extinction coefficient and the extinction coefficient and obtaining theoretical extinction coefficients of the photoresist after different exposure times; and inverting and fitting the average extinction coefficient and the theoretical extinction coefficient and obtaining the Dill parameter.

IPC Classes  ?

• G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
• G01N 21/21 - Polarisation-affecting properties

Abstract

Disclosed are a masked modeling-based method for constructing a three-dimensional (3D) medical image segmentation model and an application thereof, belonging to the field of medical image segmentation. The method comprises: establishing a semi-supervised learning network comprising a student network and a teacher network, wherein the student network comprises a coding module for extracting a potential feature and a segmentation decoder for predicting a segmentation result, and the teacher network comprises a coding module and a segmentation decoder which have the same structure as the student network; and training the semi-supervised learning network, during the training, two random mask operations being performed on each image, then images being inputted into two networks, the weight of the student network being optimized and updated according to a training loss function, and then the weight being migrated to the teacher network, wherein the training loss function comprises a prototype representation loss for representing the difference between prototypes extracted and generated by the two networks, and the student network may further comprise a reconstruction decoder and an auxiliary segmentation decoder. The present method can improve the robustness, generalization performance and accuracy of a 3D medical image segmentation model when there are scarce samples.

IPC Classes  ?

• G06T 7/10 - SegmentationEdge detection
• G06V 10/26 - Segmentation of patterns in the image fieldCutting or merging of image elements to establish the pattern region, e.g. clustering-based techniquesDetection of occlusion
• G06N 3/0895 - Weakly supervised learning, e.g. semi-supervised or self-supervised learning

Abstract

A control method, a control device and a wind farm system for a wind turbine frequency support are provided. The control method includes the following: calculating a comprehensive inertia power value by using a wind farm frequency modulation capability level coefficient when a frequency accident occurs in the wind farm; obtaining a real-time rotational speed of each wind turbine to calculate a state factor that changes in real time, where each wind turbine adjusts a state reference power value of its own by exchanging the state factor with a neighboring wind turbine; and determining instantaneous stator power of each wind turbine by using a MPPT part corresponding to the rotational speed, the comprehensive inertia power value, and the state reference power value, so as to control each wind turbine to perform frequency support until a predetermined frequency support time is reached.

IPC Classes  ?

• F03D 7/04 - Automatic controlRegulation
• F03D 17/00 - Monitoring or testing of wind motors, e.g. diagnostics

Abstract

A method for establishing a three-dimensional ultrasound image blind denoising model and a use thereof include: adding a speckle noise to three-dimensional biological structure images of a same size and without speckle noise to obtain a training data set; establishing a three-dimensional denoising network based on an encoding-decoding structure, wherein the encoding structure is used to obtain N feature maps of a three-dimensional input image and perform a downsampling to obtain feature maps of different scales; the decoding structure is used to take a feature map obtained by the encoding structure as an input and reconstruct a three-dimensional image without speckle noise through upsampling; dividing the encoding-decoding structure into a plurality of stages by a downsampling structure and an upsampling structure; training the three-dimensional denoising network using the training data set to obtain a three-dimensional ultrasound image blind denoising model.

IPC Classes  ?

• G06T 5/60 - Image enhancement or restoration using machine learning, e.g. neural networks
• G06T 5/70 - DenoisingSmoothing

Abstract

The disclosure discloses a thermal reawakening operation method and system for enhancing polarization of a hafnium-based ferroelectric film, belonging to the field of micro-nanoelectronic technology, which includes the following. S1. Heating is performed on the hafnium-based ferroelectric thin film. S2. A pulse voltage having multiple cycles is applied to the hafnium-based ferroelectric thin film. S3.The hafnium-based ferroelectric thin film is cooled to an initial temperature. In the disclosure, through the thermal reawakening operation, a certain amount of oxygen vacancies are generated, and the non-polarized phase is transformed into the polarized phase, the polarization value of the hafnium-based ferroelectric film can be significantly improved at a low cost and with a simple operation, thereby the performance of the hafnium-based ferroelectric device is significantly improved.

IPC Classes  ?

• H10N 30/045 - Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning by polarising
• H01L 29/51 - Insulating materials associated therewith

Abstract

hold, the OTS gating transistor is switched from the low resistance state to the high resistance state.

IPC Classes  ?

• G11C 11/16 - Digital stores characterised by the use of particular electric or magnetic storage elementsStorage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
• G11C 13/00 - Digital stores characterised by the use of storage elements not covered by groups , , or

Abstract

The disclosure provides a method for ptychography position correction based on probe weighting. The method includes: collecting diffraction light field intensity information and simultaneously initializing information functions of illumination probes and a sample to be tested and probe positions; obtaining and importing an exit wave into a propagation model to obtain a simulated diffraction light field and replacing the diffraction light field intensity information to obtain an updated diffraction light field; importing the updated diffraction light field into a backpropagation model and obtaining a diffraction exit wave and updating the information functions of the sample to be tested and the illumination probes at each scan position; and forming a probe matrix around the probe positions, updating the probe positions after calculating a correlation, and repeating the above steps to iterate until the predetermined number of iterations is completed or a predetermined condition is reached.

IPC Classes  ?

• G02B 21/06 - Means for illuminating specimen
• G02B 21/36 - Microscopes arranged for photographic purposes or projection purposes

Abstract

A high-speed and large-current adjustable pulse circuit, an operating circuit and an operating method of a phase-change memory are provided. The high-speed and large-current adjustable pulse circuit is provided with a clamping structure, a current mirror structure and a leakage current shutdown structure. The clamping structure including a clamping operational amplifier and a first MOS transistor is configured to generate a reference current. The current mirror structure is configured to generate an output current proportional to the reference current. The leakage current shutdown structure is configured to turn off the current mirror structure and reduce leakage current when pulse disappear. In this way, a device with an adjustable current and a reduced leakage current is realized.

IPC Classes  ?

• G11C 11/00 - Digital stores characterised by the use of particular electric or magnetic storage elementsStorage elements therefor
• G11C 13/00 - Digital stores characterised by the use of storage elements not covered by groups , , or

Abstract

A nonlinear optical device includes two coupling systems. A coupling coefficient between the two coupling systems is regulated and controlled. During operation, the pump light input from a straight waveguide is coupled into the second coupling system through the first coupling system and obtains great resonance enhancement in the second coupling system, so it is ensured that the second coupling system is in a high energy state. For signal light input from the same end of the straight waveguide, the signal light enters a resonator of the second coupling system through the coupling between the first and second coupling systems. A nonlinear effect of the system mainly occurs in the resonator of the second coupling system because in the resonator of the second coupling system, the pump light is in a great resonance enhancement. The entire resonator is in a high energy state.

IPC Classes  ?

• G02F 1/35 - Non-linear optics

Abstract

A method and system for encryption and assured deletion of information is provided, the method at least includes: sorting fields of the information into at least two sensitivity levels by sensitivity; generating encryption keys and key shards thereof based on predetermined thresholds, and creating mapping between targets and the key shards, based on the encryption keys for the sensitivity levels, encrypting the information fields of the corresponding sensitivity levels and deleting the original information and encryption keys; and in response to reception of a recover request, recovering the encryption keys based on the key shards and performing decryption, so as to recover the original information. The present disclosure aims at the problem that information is difficult to be safely stored and assuredly deleted, and realizes multi-party security key deletion of encrypted personal information.

IPC Classes  ?

• H04L 9/08 - Key distribution
• H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system

Abstract

The present invention relates to a Biochemical-Level Automatic-screening Smart droplet-TO-micro-hydrogels chip (BLASTO-chip) system for sperm selection. The BLASTO-chip technology advances sperm selection from the primitive morphology level to a more sophisticated biochemical level, and it will not only provide a powerful tool to patients who have fertility problems but also work as a platform for further development of more advanced sperm selection technologies. The present invention also provides a method for improving the success rate of in vitro fertilization in a patient with asthenospermia.

IPC Classes  ?

• C12M 3/06 - Tissue, human, animal or plant cell, or virus culture apparatus with filtration, ultrafiltration, inverse osmosis or dialysis means
• C12M 1/12 - Apparatus for enzymology or microbiology with sterilisation, filtration, or dialysis means
• C12M 1/26 - Inoculator or sampler
• C12M 1/36 - Apparatus for enzymology or microbiology including condition or time responsive control, e.g. automatically controlled fermentors
• C12M 3/00 - Tissue, human, animal or plant cell, or virus culture apparatus
• C12N 5/076 - Sperm cellsSpermatogonia

Abstract

A method and system for automatic deletion of information based on time synchronization and trusted counting is provided, the method including: defining different data structures including configurations in a normalized manner; setting triggering conditions for automatic information deletion, including conditions for automatic deletion based on time synchronization and/or based on trusted counting; maintaining synchrony of the configurations across different domains; and after satisfying the triggering conditions, making an information source domain and/or an information propagation domain perform the automatic information deletion. Considering that existing data deletion mechanisms cannot delete information according to preset retention periods, the present application employs synchrony across system clocks to perform automatic deletion of authorization information under circulation after a certain time period, and further limits a circulation count for information of interest so as to ensure that the information and its copies are all deleted after reaching a preset maximum permittable circulation count.

IPC Classes  ?

• G06F 16/20 - Information retrievalDatabase structures thereforFile system structures therefor of structured data, e.g. relational data
• G06F 16/27 - Replication, distribution or synchronisation of data between databases or within a distributed database systemDistributed database system architectures therefor

Abstract

An additive manufacturing method and device for a complex structure of a fiber reinforced composite material. The complex structure is a skin-honeycomb sandwich structure. The manufacturing method comprises: printing a supporting mold with a water-soluble resin material by means of a fused deposition modeling process; placing a fiber reinforced prepreg on the supporting mold by means of an automatic fiber placement process with the aid of laser heating and constant-force rolling, so as to form a lower-layer skin structure; printing the fiber reinforced composite material on the surface of the lower-layer skin structure by means of the fused deposition modeling process, so as to form a honeycomb structure; performing placement again on the honeycomb structure to form an upper-layer skin structure; and removing the supporting mold to obtain the skin-honeycomb sandwich structure. A complex structure of a fiber reinforced composite material, such as the skin-honeycomb sandwich, for aerospace purposes can be quickly manufactured without molds. Compared with traditional manufacturing methods, the present method greatly reduces the time and cost for manufacturing parts while ensuring mechanical properties.

IPC Classes  ?

• B29C 64/165 - Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
• B29C 64/40 - Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
• B29C 70/44 - Shaping or impregnating by compression for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding

Abstract

The invention introduces a lattice current collector with both functions of strain sensing and high-temperature circuit breaking and a manufacturing method thereof. The method includes: S1: constructing a model of a three-dimensional lattice substrate; S2: taking a mixed powder as a raw material, performing printing according to the constructed model of the three-dimensional lattice substrate based on additive manufacturing technology to obtain the three-dimensional lattice substrate, the mixed powder including a flexible polymer powder and a permanent magnetic powder; S3: performing surface treatment on the three-dimensional lattice substrate, preparing a liquid metal, and transferring the liquid metal to a surface of the three-dimensional lattice substrate to form a conductive network; S4: magnetizing the three-dimensional lattice substrate to obtain a magnetic three-dimensional lattice substrate current collector, i.e., a lattice current collector with both functions of strain sensing and high-temperature circuit breaking.

IPC Classes  ?

• B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
• B22F 1/10 - Metallic powder containing lubricating or binding agentsMetallic powder containing organic material
• B22F 10/12 - Formation of a green body by photopolymerisation, e.g. stereolithography [SLA] or digital light processing [DLP]
• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• H01M 4/72 - Grids

Abstract

A method and system for overwriting-based deletion of information and verification of deletion is provided, wherein the method at least includes: receiving a deletion request and/or a random seed; performing fine-grained overwriting on the information by means of random overwriting; in response to an extraction request for a post-deletion state, making a master node in a source domain of the information broadcast the extraction request to at least one slave node; and sending the post-deletion state fed back by the slave node and a related state-verification parameter to a verifying terminal, so that the verifying terminal verifies an overwriting result based on a verifiable pseudo-random function. Thus, the present application can effectively prevent information recovery after being logically deleted, and efficaciously ensure verifiability as well as non-recoverability of deleted information, thereby assuring non-recoverable deletion and providing verifiability of deletion to information subjects.

IPC Classes  ?

• G06F 16/16 - File or folder operations, e.g. details of user interfaces specifically adapted to file systems
• G06F 21/60 - Protecting data

Abstract

The present invention belongs to the field of magnetic suspension bearing control. Disclosed are a switch short-circuit fault tolerance control method and system for a magnetic suspension bearing. An N-axis magnetic suspension bearing comprises 2N H-half-bridge driving topologies, 2N windings, and one direct current voltage source. During normal system operation, the current of each winding and a modulation wave value outputted by a current loop are monitored in real time. When a short-circuit fault of a switch device occurs, the faulty switch device is identified by determining the value of the current of each winding and the corresponding modulation wave value outputted by the current loop. By introducing a physical model of the electromagnetic force of the magnetic suspension bearing, the current of the corresponding winding is redistributed to reconstruct the required electromagnetic force, which ensures the normal suspension of a rotor, thereby preventing serious faults such as system shutdown due to rotor dropout. The described method may effectively prevent instability of a magnetic suspension bearing system during a switch short-circuit fault, prevent rotor dropout, and equip the magnetic suspension bearing system with the capability of fault-tolerant operation during a switch short-circuit, thereby effectively improving the reliability of the system.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means

Abstract

A glycosylation method with participation of a trivalent iodine reagent. The method is characterized in that a glycosyl donor (I) is activated in the presence of a trivalent iodine reagent and a transition metal catalyst, and then reacts with an acceptor (II) under acid catalysis or directly reacts to obtain a glycosylation product (III). In the glycosyl donor (I), Gly is glycosyl, one or more hydroxyl groups on the sugar ring of which are protected by a protecting group; X is an oxygen, sulfur or selenium atom; R is an alkyl or aryl; and the receptor (II) is selected from saccharide, alcohol, phenol, flavonoid, carboxylic acid, phosphoric acid, pyrimidine, purine, amide, sulfonamide, guanidine, arylamine, indole, silyl enol ether, mercaptan or thiophenol nucleophilic reagents containing one or more free hydroxyl groups.

IPC Classes  ?

• C07H 15/18 - Acyclic radicals, substituted by carbocyclic rings
• C07H 15/04 - Acyclic radicals, not substituted by cyclic structures attached to an oxygen atom of a saccharide radical
• C07H 15/203 - Monocyclic carbocyclic rings other than cyclohexane ringsBicyclic carbocyclic ring systems
• C07H 17/04 - Heterocyclic radicals containing only oxygen as ring hetero atoms
• C07H 19/01 - Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radicalNucleosidesMononucleotidesAnhydro derivatives thereof sharing oxygen
• C07H 1/00 - Processes for the preparation of sugar derivatives
• C07D 309/10 - Oxygen atoms

Abstract

The present invention belongs to the technical field of permanent magnet reluctance motors. Disclosed is a permanent magnet reluctance motor rotor having low-torque pulsation. The rotor is formed by combining a first lamination and a second lamination which are formed by a same punching sheet, a plurality of layers of magnetic barriers and permanent magnets being arranged under each pole, and for the first lamination, the tail ends of all layers of the magnetic barriers of the rotor on one side of a q-axis being respectively deviated by a certain angle relative to the other side. By means of horizontally overturning the first lamination by 180 degrees, the second lamination is obtained, the shape of a magnetic barrier of the second lamination under a single pole being in mirror-symmetric to that of the first lamination with respect to the q-axis. The amplitudes and phases of torque harmonics of the same number of times of the two kinds of laminations are different, and superimposing and combining of the two according to a certain proportion allows the permanent magnet reluctance motor to have a larger average torque while reducing torque pulsations. The present invention can achieve suppression of torque harmonics of a specific number of times, so as to reduce torque pulsation of motors. The present invention has important significance for improving the performance of permanent magnet reluctance motors and expanded uses thereof.

IPC Classes  ?

• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02P 25/098 - Arrangements for reducing torque ripple

Abstract

u=U u*.

IPC Classes  ?

• H04B 7/0456 - Selection of precoding matrices or codebooks, e.g. using matrices for antenna weighting
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Abstract

A method and system for recognizing TLS fingerprints based on finite-state machines is provided, wherein the system at least includes: a model inference module, for learning state machine models of target TLS implementations according to mapping information sent by a message mapping module; a fingerprint extracting module, for analyzing the state machine models and extracting multi-level fingerprints of the target TLS implementations; and a version recognizing module, for verifying the multi-level fingerprints for validity and/or recognizing version information of unknown TLS implementations. As compared to other network protocol identification systems, the present disclosure can identify and judge fine-grained information such as the specific implementation type and version of the specific TLS implementation. At the same time, the inventive method is highly automated, thereby ensuring good usability and scalability.

IPC Classes  ?

• H04L 9/40 - Network security protocols

Abstract

z, in which the M element is at least one of In, Ga, Al, and Zn, and 0.1≤x≤0.9, 0.02≤y≤0.15, and 0≤z≤0.2. The problems of safety and stability of the existing material selection for the selector are solved by the selector material, the selector unit, and the preparation method thereof provided by the disclosure. In addition, the threshold voltage of the selector device prepared based on the Se-based selector material is adjustable, and the comprehensive performance is good.

IPC Classes  ?

• H10N 70/00 - Solid-state devices having no potential barriers, and specially adapted for rectifying, amplifying, oscillating or switching
• H10B 63/00 - Resistance change memory devices, e.g. resistive RAM [ReRAM] devices

Abstract

A method and system for trusted third-party audit of personal-information deletion is provided, wherein the method includes: acquiring log data of an arbitrary source-domain personal-information deleting body in a network and of its associated-domain personal-information deleting bodies; normalizing the log data according to predetermined parsing rules and thereby generating normalized log data; and performing consistency-of-notification analysis and operation-compliance analysis on the normalized log data by means of association analysis. The present application is based on an audit analysis of log files to identify whether the information deletion process conforms to the multi-dimensional or multi-level audit judgment conditions and to perform forensics on abnormal deletion of personal information in a timely manner, so as to ensure that personal-information deletion can satisfy requirements of internal control, industrial standards, policies and regulations.

IPC Classes  ?

• G06F 21/62 - Protecting access to data via a platform, e.g. using keys or access control rules

Abstract

A method and system for deleting multi-copy personal data efficiently and securely is provided, wherein the personal data and its subject identifier are signed and uploaded to data domains and stored as personal data copies; the personal data copies along with its source and destination data are circulated among the data domains; the data domain receiving a deletion instruction transmits the deletion instruction to every relevant data domains based on the identifier of the personal data subject and the destination data and then performs deletion; and after completing the deletion, the data domain deposit its domain identifier and feedback data it receives into a log, and feed the log back to its superior data domain. And the system of the present disclosure includes a plurality of data domains that can perform the above operations, thereby realizing association-based storage, association-based deletion and verification of association-based deletion of multi-copy personal data.

IPC Classes  ?

• G06F 21/62 - Protecting access to data via a platform, e.g. using keys or access control rules
• H04L 9/08 - Key distribution
• H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system

Abstract

A system and method for acceleration of deep-learning computing with edge-terminal collaboration is provided, wherein the system includes at least one terminal device and at least one edge server. The terminal device is configured to, when being present in a service coverage of the at least one edge server, determine an inter-layer partitioning and/or intra-layer partitioning policy for a deep learning model based on first configuration information related to the terminal device itself and second configuration information related to the edge server. And the edge server is configured to execute the inter-layer partitioning and/or intra-layer partitioning policy for the deep learning model in response to an inference request message, so as to implement collaborative inference. In the present disclosure, by using the load-based random forest method to predict the execution time for the DNN model, more accurate prediction results can be obtained.

IPC Classes  ?

• G06N 3/092 - Reinforcement learning
• G06N 20/20 - Ensemble learning

Abstract

Provided in the present invention are a cavitation-erosion-resistant laser cladding material, and the use thereof in the surface repair of a flow passage component of a hydropower station. The material comprises the following components, in percentages by weight: 55-70% of cobalt, 15-32% of chromium, 1-5% of tungsten, 10-20% of a metal nano oxide, 1-10% of a carbon powder and the balance of manganese and/or molybdenum. Since ceramic particles are added to the material and are fused with metal-based powder, a coating obtained after laser cladding has the properties of high chemical stability, a high hardness, wear resistance, etc. of ceramic and also has the strength and toughness of a metal, such that better cavitation erosion resistance and erosion resistance are achieved.

IPC Classes  ?

• C23C 24/10 - Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
• C22C 19/07 - Alloys based on nickel or cobalt based on cobalt