Disclosed is a control method for a hybrid parallel integrated power supply. Under the condition of a 2:1 current ratio between a Si-based inverter and a SiC-based inverter, an optimal power ratio between the two inverters is obtained by reducing a power loss of a fundamental wave component on the Si-based inverter. Based on the fitting for effective values of a harmonic current on the Si-based inverter, an optimal switching frequency of the Si-based inverter and a relationship between a minimum harmonic-current conduction loss and a switching loss under the optimal switching frequency are obtained. Zero sequence components of the current are eliminated through rapid switching of the SiC-based inverter, to suppress harmonic waves.
H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
H02M 1/12 - Arrangements for reducing harmonics from AC input or output
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
H02M 7/493 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
2.
OPTIMAL CURRENT SELECTION METHOD FOR HYBRID PARALLEL INTEGRATED POWER SUPPLY
The present disclosure provides an optimal current selection method for a hybrid parallel integrated power supply, including the following steps: step S1: selecting multiple power device combinations with different current ratios, the combinations being formed by silicon insulated-gate bipolar transistor (Si IGBT) and silicon carbide metal-oxide-semiconductor field-effect transistor (SiC MOSFET) devices; step S2: comparing cost and junction temperatures on the Si IGBT devices and the SiC MOSFET devices under the different current ratios; step S4: comparing efficiency of a hybrid parallel integrated power supply with the different current ratios under different SiC MOSFET switching frequencies; step S5: comparing electromagnetic interference (EMI) noise of the hybrid parallel integrated power supply; step S6: selecting an optimal current ratio for the hybrid parallel integrated power supply.
Disclosed in the present invention is a multi-view fusion human motion estimation method based on distributed progressive Gaussian filtering. The method comprises: firstly, performing data collection by means of two Azure Kinect DK cameras, and determining initial data; then, performing data filtering fusion processing; performing classification processing on the initial data of the two Azure Kinect DK cameras by using a Mahalanobis distance, and screening and discarding measurement information of the Azure Kinect DK camera highly susceptible to visual occlusion; for measurement information of the Azure Kinect DK camera which is determined to be less affected by visual occlusion, guiding, by means of measurement information of another Azure Kinect DK camera, to perform progressive filtering fusion on the measurement information of the Azure Kinect DK camera, so as to achieve the effect of implicit compensation; and finally, performing global fusion, so as to further improve the precision of human body pose estimation. The method has the advantages of low cost and high precision, and it is not necessary for a tester to wear a joint point marker, and thus, no inconvenience is caused to the tester.
A household perishable garbage treatment equipment and a use method thereof are provided, relating to the technical field of environmental engineering. The equipment includes a crushing unit, a pyrolysis unit, and a condensation and washing unit. Perishable garbage is crushed by the crushing unit, then the crushed perishable garbage is pyrolyzed into pyrolytic biochar by the pyrolysis unit, and gas produced in the pyrolysis process is condensed and collected by the condensation and washing unit. The household perishable garbage treatment equipment and the use method thereof can effectively treat perishable garbage on the spot, reduce the collection and treatment cost required by traditional perishable garbage treatment modes, achieve carbon sequestration and resource utilization of products, and have significant economic, ecological and social benefits.
C10B 47/06 - Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with stationary charge in retorts
A closestool with classification, collection and treatment functions is provided, and relates to the technical field of closestools. The closestool includes a closestool body, an anal flushing device, a feces collection and treatment device, a heat recovery box, a urine flushing device, a closestool cover plate, a control panel and a liquid collection device. Through effectively treating feces and urine on the spot, carbonized feces and urine crystals which can realize resource utilization are generated at the same time. Compared with the traditional feces and urine treatment mode of collecting by pipe network and centralized treatment in sewage treatment plants, the treatment cost is reduced, the carbon sequestration of organic waste is realized, the carbon emission is reduced, the phosphorus resources in sewage are recovered, and the water resources are saved by reducing flushing water.
A voltage mode weak-PUF circuit with rich challenge-response pairs comprises four decoders, two PUF arrays, a sequential control circuit and a voltage comparator. One-to-two PUF arrays are used to replace existing one-to-one PUF arrays to increase the number of challenge-response pairs by 2N times, from 2N realized by the one-to-one PUF arrays to 2N×2N, wherein N=a+b. Each PUF cell comprises m*n PUF cells and n transmission gates, and adopts a simple common-source amplifier structure formed by a first PMOS transistor, a first NMOS transistor and a second NMOS transistor, wherein any one PUF cell in one PUF array can be compared with any one PUF cell in the other PUF array to generate an output response. The number of output responses is 2N, so the proportion of the PUF cells for generating one challenge-response pair is 2N/2N=1/2N, and the reuse rate of the same PUF cell is merely 1/2N.
G06F 21/75 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation, e.g. to counteract reverse engineering
G06F 21/73 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by creating or determining hardware identification, e.g. serial numbers
A reconfigurable PUF with two PUF functions comprises 2m×n PUF cells, a sequential control module, a row selection module, n amplification modules, n first bit lines, and n second bit lines. Each of the 2m×n PUF cells comprises a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, a second NMOS transistor, a third NMOS transistor, a fourth NMOS transistor, a fifth NMOS transistor, a sixth NMOS transistor and a seventh NMOS transistor. The PUF cells can provide two independent responses, and can operate in a SRAM mode and an inverter mode. Therefore, the reconfigurable PUF with two PUF functions can operate both in the SRAM mode and the inverter mode, and a PUF operating mode with higher reliability is selected for generating final responses.
G06F 21/75 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation, e.g. to counteract reverse engineering
H03K 19/0948 - Logic circuits, i.e. having at least two inputs acting on one outputInverting circuits using specified components using semiconductor devices using field-effect transistors using MOSFET using CMOS
8.
SILICON CARBIDE HETEROJUNCTION NORMALLY-OFF HIGH-ELECTRON-MOBILITY TRANSISTOR AND METHOD FOR PREPARING THE SAME
A method for preparing a silicon carbide heterojunction normally-off high-electron-mobility transistor includes selecting an unintentionally doped n-type 4H-SiC chip as a substrate; growing a 4H—SiC transition layer on the substrate through isomorphic epitaxial growth, and growing a C face on the 4H—SiC transition layer through epitaxial growth; growing an unintentionally doped 3C—SiC potential well layer on the C face of the 4H—SiC transition layer; growing an n-type doped 4H—SiC barrier layer on the 3C—SiC potential well layer, and growing a Si face on the 4H—SiC barrier layer through epitaxial growth; growing an unintentionally doped 3C—SiC cap layer on the Si face of the 4H—SiC barrier layer; and producing electrodes and protective films, so as to obtain a 3C—SiC/4H—SiC heterojunction normally-off single-channel high-electron-mobility transistor. The method allows two sides of the SiC heterojunction interface have homogeneous elements during preparation, thereby eliminating diffusive contamination and reducing process complexity.
The present invention discloses a highly reliable positive-to-negative voltage conversion circuit, including a first inverter, a first buffer, a second buffer, a first to seventh NMOS transistors, a first to third PMOS transistors, a first resistor, a second resistor, a third resistor, and a fourth resistor, wherein the third PMOS transistor, the third NMOS transistor, the fourth NMOS transistor, the fifth NMOS transistor, the sixth NMOS transistor and the seventh NMOS transistor form an on/off control circuit, with that a power supply path between a positive-voltage power supply terminal and a negative-voltage power supply terminal is physically isolated by the on/off control circuit to eliminate voltage reversing occurring when the positive-voltage power supply terminal and the negative-voltage power supply terminal cannot be synchronized during power-on.
A confined silica/multi-walled carbon nanotube composite material, its preparation method, and application are provided. The preparation method includes the following steps: S1: dispersing multi-walled carbon nanotubes in a methyl-substituted benzene solvent and subjecting them to ultrasonication for 10 minutes at room temperature; S2: after the completion of ultrasonication, adding liquid silicon tetrachloride to the multi-walled carbon nanotube/xylene suspension and continuing ultrasonication for 10 minutes at room temperature; S3: heating the mixture in an oil bath to 145° C. and performing reflux; S4: after the reaction is complete, naturally cooling to room temperature, centrifuging, washing, and drying the obtained solid to obtain a dry sample, thereby obtaining the confined silica/multi-walled carbon nanotube composite material. The confined silica/multi-walled carbon nanotube composite material exhibits excellent rate capability and cycling stability, and has great application potential and industrial value.
A PUF circuit based on the threshold loss of MOSFETs comprises N stages of delay units and an arbiter. Each stage of delay unit comprises six inverters and four MOS transistors, wherein the four MOS transistors are all PMOS transistors or NMOS transistors. Each path in each stage of delay unit uses only one PMOS or NMOS transistor and does not use a transmission gate formed by a PMOS transistor and an NMOS transistor. Therefore, it reduces hardware cost. Each MOS transistor on the transmission path has a threshold loss, PMOS and NMOS transistors in a third inverter and a sixth inverter are in an on-state, and output terminals of the third inverter and the sixth inverter will be charged to a high level or discharged to a low level, thus greatly increasing a delay difference between two square signals and enhancing randomness.
H03K 19/003 - Modifications for increasing the reliability
G06F 21/75 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation, e.g. to counteract reverse engineering
H03K 5/133 - Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals using a chain of active-delay devices
12.
PUF-based magnetometer with safety protection circuit
A PUF-based magnetometer with a safety protection circuit is provided. The PUF-based magnetometer includes a TMR magnetometer main structure, a control circuit, a column encoder circuit, a row encoder circuit, a multiplexer and a dynamic comparator. The TMR magnetometer main structure includes n*n TMR sensors, and the TMR magnetometer main structure can also form a PUF circuit together with a control circuit, a column encoder circuit, a row encoder circuit, a multiplexer and a dynamic comparator to realize a function of a TMR magnetometer. The PUF circuit generates PUF response signals based on random deviations of a TMR sensor fabrication process. The PUF response signals generated by the PUF circuit make it more difficult for attackers to locate specific positions of the TPR sensors, and even make it hard to know the existence of the deviations of the TMR sensors.
H01L 23/00 - Details of semiconductor or other solid state devices
H10D 84/83 - Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups or , e.g. integration of IGFETs of only field-effect components of only insulated-gate FETs [IGFET]
13.
DOUBLE-ROBOTIC-ARM COLLABORATIVE FLEXIBLE ASSEMBLY SYSTEM AND METHOD FOR DISORDERED CIRCUIT BREAKER PARTS
A double-robotic-arm collaborative flexible assembly system and method for disordered circuit breaker parts is provided. The system includes a target detection positioning module, configured to process an image of various types of circuit breaker parts disorderly placed in a loading tray, and determine spatial pose information and type information of the circuit breaker parts; an intelligent obstacle avoidance grabbing module, configured to determine an optimal obstacle avoidance path, clamping jaw types, and a moving instruction; and a double-robotic-arm flexible collaborative module, configured to determine an optimal double-robotic-arm collaborative technology by using a trained double-robotic-arm collaborative technology decision-making model according to the type information of the target circuit breaker part, and then place the target circuit breaker part into a loading mold.
The present invention provides an optimal current selection method for a hybrid parallel integrated power supply. The method comprises the following steps: step S1, selecting multiple power device combinations of Si IGBT and SiC MOSFET having different current ratios; step S2, performing cost analysis on the Si IGBT devices and SiC MOSFET devices having different current ratios; step S3, performing junction temperature analysis and comparison on the Si IGBT devices and the SiC MOSFET devices having different current ratios; step S4, comparing the efficiency of the hybrid parallel integrated power supply having multiple current ratios at different power levels and different SiC MOSFET switching frequencies; step S5, performing comparative analysis on EMI noise of the hybrid parallel integrated power supply, and studying the influence of different current ratios on the EMI noise of the hybrid parallel integrated power supply; step S6, studying the influence of different current ratios on device cost and junction temperature, and the efficiency and EMI noise of the hybrid parallel integrated power supply; step S7, selecting an optimal current ratio of the hybrid parallel integrated power supply.
H02M 7/537 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
G06F 30/20 - Design optimisation, verification or simulation
15.
CONTROL METHOD FOR INTEGRATED HYBRID PARALLEL POWER SUPPLY
Disclosed in the present invention is a control method for an integrated hybrid parallel power supply. Taking the case where a current distribution ratio of a Si-based inverter to a SiC-based inverter is 2:1 as an example, an optimal power distribution ratio of the two inverters is obtained by reducing the power loss of fundamental components on the Si-based inverter; on the basis of the fitting of effective values of harmonic currents on the Si-based inverter, an optimal switching frequency thereof and the relationship between the minimum harmonic current conduction loss and a switching loss at the frequency are obtained; and zero-sequence components of currents are eliminated by means of rapid switching of the SiC-based inverter, so as to suppress harmonics. The present invention provides an integrated hybrid parallel power supply topology with a power distribution optimization method for minimizing the total power loss, while ensuring a rational THD of the integrated hybrid parallel power supply topology.
A device encrypted authentication method based on a strong physical unclonable function is disclosed, including: generating β matrixes formed by random transformation of a ┌√{square root over (b)}┐-order unit matrix, such that unnecessary device expenditure is reduced; when a sensing device is identified, information to be synchronized between the sensing device and a back-end server is transmitted in the registration phase, such that an attacker cannot obtain confidential information in the encryption phase, and the attacker cannot traverse or completely crack all these possible combinations in a short time; even if the attacker intercepts some CRPs, it is scarcely possible that data sent by the sensing device matches the CRPs collected by the attacker, and with the increase of the number b of bits of challenges and the quick convergence to 0, the accuracy of random guessing is only 50%.
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
17.
METHOD FOR SOLVING PARAMETERS OF EXTENSION/COMPRESSION SPRING BY AC SALP SWARM ALGORITHM
Disclosed is a method for solving parameters of extension/compression springs by an AC salp swarm algorithm, including the following steps. Determine design parameters to be solved of an extension/compression spring. Construct an objective function for solving the design parameters of the extension/compression spring based on a design objective of the extension/compression spring, wherein the design objective of the extension/compression spring is to minimize the weight of the extension/compression spring. Determine constraints of the design parameters of the extension/compression spring. Perform iterative optimization on the design parameters of the extension/compression spring using an AC salp swarm algorithm to obtain a globally optimal solution, and output the globally optimal solution as solved design parameters of the extension/compression spring, wherein the AC salp swarm algorithm is obtained by adding an AC operation between individuals during an iteration process of an existing salp swarm algorithm.
Disclosed is an imaging device for AMI diagnosis includes a first polarizer is arranged in an imaging part and a second polarizer is arranged in a light source part. These two are linear polarizers, and the polarization directions of the first polarizer and the second polarizer are perpendicular to each other. During the imaging process, a near-infrared beam emitted from a near-infrared light source is modulated into a linearly polarized light with a certain angle when passing through the second polarizer. Then, it is irradiated onto a subject and the light is reflected due to the specular reflection effect of the subject turns into a cross-polarized light when passing through the first polarizer. The linearly polarized light perpendicular to the polarization angle of the first polarizer is intercepted, that is, the reflected light is intercepted.
Disclosed is a TFET with an OR-AND logic function. By arranging a horizontal channel and a vertical channel in different directions, three gates are not connected and will not be affected by each other, and can control the current of a whole channel jointly; when a first gate and a second gate are both at a high level, the TFET will be turned on, and when the first gate and a third gate are both at a high level, the TFET will also be turned on; the horizontal channel not only isolates the second gate from the third gate, but also reduces the strength of coupling between the second gate and the third gate, so only a small current passes through the horizontal channel when the second gate and the third gate are both at a high level, and the TFET will not be turned on at this moment.
H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
H01L 27/092 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate complementary MIS field-effect transistors
H01L 29/08 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions with semiconductor regions connected to an electrode carrying current to be rectified, amplified, or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
A signal processing circuit for a tunneling magnetoresistance sensor comprises thirty-eight MOS transistors, two capacitors and ten switches. A first switch, a second switch, a third switch, a fourth switch, a first MOS transistor, a second MOS transistor, a third MOS transistor and a fourth MOS transistor form a high-frequency modulation circuit. A fifth switch, a sixth switch, a seventh switch, an eighth switch, a seventeenth transistor, a twenty-second MOS transistor and a twenty-third MOS transistor form a high-frequency demodulation circuit. A signal output by a tunneling magnetoresistance sensor is modulated to a chopping frequency by the high-frequency modulation circuit, and is then demodulated by the high-frequency demodulation circuit.
A FET with a multi-value switching function comprises a source region, a channel region, a drain region, a gate dielectric layer, a substrate layer, a gate-oxide inducer layer, a metal layer and a spacer layer. The channel region is an undoped channel region, the drain region is an undoped drain region. The metal layer comprises first to third metal blocks which are arranged at intervals from left to right, the distance between the first metal block and the second metal block is 12 nm, the distance between the second metal block and the third metal block is 10 nm, the first metal block is a main control gate of the FET, the second metal block and the third metal block are two inducer gates of the FET, and the spacer layer is used for isolating the first metal block from the second metal block and the third metal block.
H01L 29/68 - Types of semiconductor device controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified, or switched
H01L 29/205 - Semiconductor bodies characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds including two or more compounds in different semiconductor regions
A method for assessing sliding electrical contact performance of an electric locomotive pantograph-catenary system includes determining a current manifestation of a catenary-following ability of a pantograph to a catenary of the pantograph-catenary system, wherein the current manifestation is one or more of a pressure difference, a time delay, and a curve difference; and performing comparison between a fluctuating pressure curve related to a fluctuating pressure of the catenary and a catenary-following pressure curve related to a catenary-following pressure of the pantograph over time under the current manifestation, and rating the catenary-following ability of the pantograph under the current manifestation according to a result of the comparison. By implementing the method, precise assessment of the sliding electrical contact performance can be achieved.
A readout circuit for a high-precision vibration sensor comprises an on-chip self-test circuit, a low-noise charge amplifier, a correlated double sampling circuit, a PID feedback control circuit, a phase compensation circuit and Sigma-Delta. A self-test signal is amplified by the low-noise charge amplifier, low-frequency noise and offsets are filtered out by the correlated double sampling circuit, then a self-test path and a working path of a vibration sensor are separated in the time domain by the PID feedback control circuit, the phase compensation circuit performs zero compensation and pole compensation on the signal, and Sigma-Delta converts an analog signal into a high-precision digital signal.
G01P 15/125 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values by capacitive pick-up
G01P 21/00 - Testing or calibrating of apparatus or devices covered by the other groups of this subclass
H03M 3/00 - Conversion of analogue values to or from differential modulation
24.
Machine learning attack resistant strong PUF with dual-edge sampling function
A machine learning attack resistant strong PUF with a dual-edge sampling function comprises switch units, a first arbiter and a second arbiter. The first arbiter is for determining a sequential order of delays at a rising edge of signals input to a first input terminal and a second input terminal of the first arbiter. The second arbiter is for determining a sequential order of delays at a falling edge of signals input to a first input terminal and a second input terminal of the second arbiter. Each switch unit is composed of eight MOS transistors. The strong PUF has a high capacity to resist machine learning attacks and small hardware expenditure through simple structural design of the switch units, realizing machine learning attack resistance and small hardware expenditure at the same time, and generating a large number of challenge response pairs through dual-edge sampling realized by the two arbiters.
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
G06F 21/75 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation, e.g. to counteract reverse engineering
25.
Challenge screening method for improving stability of strong physical unclonable function
The invention discloses a challenge screening method for improving the stability of a strong Physical Unclonable Function (PUF). If the stability of the group of challenges (GOCs) is quantized by 1 or 0, the GOCs are defined as stable challenges or unstable challenges respectively; the GOCs and the stability of corresponding responses are defined as a challenge-stability pair (CSP); a machining learning training dataset is constructed through CSPs for obtaining a screening model, to associate the challenge stability with the screening model; during actual application of the strong PUF, the challenge stability of a strong PUF is determined through the screening model, and stable challenges of the strong PUF are screened out to form a stable challenge set, which is input into the strong PUF to extract identity information. The challenge screening method can effectively improve the stability of various strong PUFs and has better effect with external disturbance increasing.
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
26.
Bistable physical unclonable function circuit based on subthreshold leakage current deviation
th word line signal which is input to the PUF array, the PUF array is used for generating 16 response signals under the control of the precharge signal and the 16 word line signals, and comprises four PMOS transistors, four NMOS transistors, two two-input NAND gates and sixteen PUF units, and each PUF unit comprises two NMOS transistors.
H03K 19/003 - Modifications for increasing the reliability
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
27.
SILICON CARBIDE HETEROJUNCTION NORMALLY-CLOSED HIGH-ELECTRON-MOBILITY TRANSISTOR AND PREPARATION METHOD THEREFOR
Provided in the present invention is a preparation method for a silicon carbide (SiC) heterojunction normally-closed high-electron-mobility transistor. The method comprises: selecting an unintentionally doped n-type 4H-SiC wafer as a substrate; homogeneously and epitaxially growing a 4H-SiC transition layer on the surface of the substrate, and epitaxially growing a C face on an upper surface of the 4H-SiC transition layer; growing an unintentionally doped 3C-SiC potential well layer on the C face of the 4H-SiC transition layer; growing an n-type doped 4H-SiC barrier layer on an upper surface of the 3C-SiC potential well layer, and epitaxially growing an Si face on an upper surface of the 4H-SiC barrier layer; growing an unintentionally doped 3C-SiC cap layer on the Si face of the 4H-SiC barrier layer; and manufacturing an electrode and a protective film, so as to obtain a 3C-SiC/4H-SiC heterojunction normally-closed single-channel high-electron-mobility transistor. In the implementation of the present invention, elements on two sides of an SiC heterojunction interface are the same during a preparation process, such that there is no diffusion pollution, and the process complexity is reduced; and the obtained SiC heterojunction normally-closed high-electron-mobility transistor has a low threshold voltage, a very small specific on-resistance, a high breakdown voltage, a large power quality factor and high use reliability.
A low-power pulse output circuit comprises first to third PMOS transistors, first NMOS to third NMOS transistors, a resistor regulation module, a capacitor regulation module, an inverter and a buffer. Drains of the first PMOS and first NMOS transistors, gates of the first NMOS, second PMOS, second NMOS, and third NMOS transistors are connected. Drain of the second PMOS transistor, gate of the third PMOS transistor and one terminal of the resistor regulation module are connected. The other terminal of the resistor regulation module and drain of the second NMOS transistor are connected. Drain of the third PMOS transistor, drain of the third NMOS transistor and an input terminal of the inverter are connected. An output terminal of the inverter, the other terminal of the capacitor regulation module and an input terminal of the buffer are connected.
Disclosed is a watt-level piezoelectric transducer in a simply supported beam structure under a traffic load. The piezoelectric transducer includes a piezoelectric transducer body, the piezoelectric transducer body including a housing, a plurality of piezoelectric beam units and an energy collection unit; each piezoelectric beam unit includes a beam support component, a plurality of piezoelectric plate components and a metal stress transmission plate, where the beam support component includes two support members; and the piezoelectric plate components sequentially penetrate the metal stress transmission plate, two ends of each of the plurality of piezoelectric plate components are transversely inserted between the two support members, and the plurality of piezoelectric plate components are arranged in a simply supported manner. The piezoelectric transducer can collect piezoelectric energy under the action of a road load, and store the energy by means of the energy collection system, so to achieve watt-level energy output.
H02N 2/18 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
H01L 41/113 - Piezo-electric or electrostrictive elements with mechanical input and electrical output
A parallel multiplier for the Saber algorithm comprises a coefficient memory, two parallel pre-adding circuits, three parallel multiplication circuits and a post-adding circuit. The coefficient memory, the two parallel pre-adding circuits, the three parallel multiplication circuits and the post-adding circuit adopt a divide-and-conquer strategy, the two parallel pre-adding circuits perform parallel computation, and the three parallel multiplication circuits perform parallel computation, such that the computation time of modulo multiplication is shorted; the modulo operation of non-prime numbers is realized by limiting the bit width, such that the constraint that the modulus is a prime number is avoided; and the Karatsuba algorithm is called once, such that extra circuit area expenditure is reduced. Thus, the parallel multiplier for the Saber algorithm is implemented by hardware, low in computation complexity, not limited by the constraint that the modulus is a prime number, and low in circuit area expenditure.
G06F 7/72 - Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radixComputing devices using combinations of denominational and non-denominational quantity representations using residue arithmetic
31.
Optical fiber multi-parameter sensing system and method
An optical fiber multi-parameter sensing system and method are provided. The optical fiber multi-parameter sensing system comprises a light source, an optical circulator, a fiber-tip probe sensor and an optical spectrum analyzer, wherein the fiber-tip probe sensor can be placed into an analyte without changing the characteristics of the analyte. The variation of a bulk parameter that is a bulk refractive index of bulk environment around the fiber-tip probe sensor and a surface parameter which is a thickness of surface dielectric layer of the fiber-tip probe sensor can be determined simultaneously by monitoring the changing of resonance intensity and resonance wavelength of a single fiber-tip leaky mode resonance. The sensing system optionally configured such that multiple parameters in the analyte around the fiber-tip probe sensor can be obtained by detecting a single resonance peak.
G01N 21/77 - Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
A method for optimizing a weight of a disc spring includes: determining an objective function for weight optimization of the disc spring and key parameters to be solved; optimizing an original Harris Hawks optimization structure, specifically including: first, eliminating steps of centralized calculation of objective function values of the original Harris Hawks optimization except a step of population initialization, and recording a result when a better solution is obtained; second, introducing a random unit permutation mechanism before an end of each iterative optimization of the original Harris Hawks optimization; third, deleting a step of searching for an energy factor E with an absolute value greater than or equal to 1; and solving the key parameters by means of the optimized Harris Hawks optimization referred to as the random unit permutation-based Harris Hawks optimization to obtain the key parameters for weight optimization of the disc spring.
The present disclosure provides a two-dimensional motor piston pump, including a two-dimensional motor and a two-dimensional piston pump. The two-dimensional motor and the two-dimensional piston pump are nested with each other and arranged coaxially. The two-dimensional motor includes a stator and an outer rotor, and the outer rotor is coaxial with the stator and is sleeved outside the stator. The two-dimensional piston pump includes: a flow distribution mechanism including a flow distribution rotor and a pump body, a piston mechanism including a left cam and a right cam; a roller assembly including a roller and a roller shaft, and a pump housing, a left end cover, and a right end cover.
A two-dimensional motor combination piston pump by combining two independent two-dimensional piston pumps into one structure is provided. The combination piston pump includes a two-dimensional motor and a two-dimensional piston pump. The outer rotator serves as the piston and the flow distribution mechanism of the two-dimensional piston pump. While operating, outer rotator rotates and moves axially.
F04B 23/06 - Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
F04B 17/03 - Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
F04B 7/00 - Piston machines or pumps characterised by having positively-driven valving
F04B 7/06 - Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports the pistons and cylinders being relatively reciprocated and rotated
F04B 9/04 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
Aspergillus oryzae of this application to treat grapefruit peel, the inhibition of α-glucosidase activity by grapefruit peel extract was significantly enhanced, and the process is simple, low cost, which is easy to achieve industrial production.
A method for solving tension/compression spring parameters by means of a communication type salp swarm algorithm. First, design parameters of a tension/compression spring to be solved are determined, then a target function for solving the design parameters of the tension/compression spring is constructed on the basis of the design purpose of the tension/compression spring, wherein the design purpose of the tension/compression spring is to minimize the weight thereof; and then a constraint condition of the design parameters of the tension/compression spring is determined; and finally, iterative optimization is performed on the design parameters of the tension/compression spring by means of a communication type salp swarm algorithm, so as to obtain a global optimal solution as solved design parameters of the tension/compression spring for output, wherein the communication type salp swarm algorithm is obtained by adding a communication operation between individuals during the iteration process of an existing salp swarm algorithm. The advantage is high precision of design parameter solving .
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
An SPUF based on combinational logic and scan chain comprises an external stimulus source, a combinational logic circuit module, a scan chain circuit module, a data processing module and n switch circuits SW0, SW1, . . . , SWn-1, n=2m, and m is an integer greater than or equal to 1; combinational logic circuit module comprises n switch circuits S0, S1, . . . , Sn-1 and a combinational logic circuit; the scan chain circuit module comprises n scan flip-flops (SFFs) SFF0, SFF1, . . . , SFFn-1; each of the n switch circuits SW0, SW1, . . . , SWn-1 and the n switch circuits S0, S1, . . . , Sn-1 is implemented by a 2-to-1 multiplexer. The SPUF based on combinational logic and scan chain has high uniqueness and randomness, requires a few clock frequency changes, and has high reliability, more bits of responses and high security.
G06F 30/333 - Design for testability [DFT], e.g. scan chain or built-in self-test [BIST]
G06F 21/75 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation, e.g. to counteract reverse engineering
38.
METHOD FOR IDENTIFYING PARAMETERS OF SINGLE-DIODE PHOTOVOLTAIC CELLS
A method for identifying parameters of single-diode photovoltaic cells comprises: measuring an actual output voltage and an actual output current of a single-diode photovoltaic cell under a given temperature and a given light intensity; constructing an ideal model of the single-diode photovoltaic cell, determining to-be-identified parameters, and establishing an objective function; and identifying the to-be-identified parameters through a backtracking search algorithm based on a sine-cosine mechanism to obtain to-be-identified parameter data of the single-diode photovoltaic cell, so that parameters identification of the single-diode photovoltaic cell is completed. The method adopts the backtracking search algorithm for parameter identification and replaces a mutation operation of the backtracking search algorithm with the sine-cosine mechanism during the identification process to prevent part of optimal search spaces from being neglected, thus being able to identify the parameters of single-diode photovoltaic cells more reliably and accurately.
Disclosed is a software PUF based on an RISC-V processor for IoT security. A 32-bit RISC-V processor is used to generate abnormal information results in an abnormal operating state under a low voltage, and the abnormal information results are used to represent the features of the 32-bit RISC-V processor; 5-bit binary data obtained by comparing the abnormal information results with normal information results has high randomness and uniqueness and it is extremely difficult to directly extract internal abnormal information result from a hardware circuit of the 32-bit RISC-V processor, so modeling attacks based on the 5-bit binary data calculated according to the abnormal information results of the 32-bit RISC-V processor are almost impossible; in addition, when the 32-bit RISC-V processor is in an abnormal operating state, the operating frequency of the 32-bit RISC-V processor is dynamically adjusted through a frequency compensation method.
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
G06F 21/56 - Computer malware detection or handling, e.g. anti-virus arrangements
40.
Vacuum-helium-leak-detection method based on carbon-nanotube-based field-emission sensor
G ratio greater than 1.0. The method involves: setting a field-emission current at an initial, small emission current, recording an average of values of the field-emission current in a time period t, forming a sensing characteristic curve of the sensor, and performing fitting on the sensing characteristic curve so as to obtain an index curve; converting pressure values of helium gas into vacuum leak rates; and packaging the cathode into a vacuum chamber in a system to be detected, performing testing when a helium stream in the system to be detected reaches balance, obtaining an average of current variations in the time period t during the testing, and comparing the average with the index curve so as to determine a vacuum leak rate of the system to be detected.
G01M 3/20 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
G01M 3/26 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
G01M 3/40 - Investigating fluid tightness of structures by using electric means, e.g. by observing electric discharges
41.
CONFINEMENT SILICON DIOXIDE/MULTI-WALLED CARBON NANOTUBE COMPOSITE MATERIAL, AND PREPARATION METHOD AND USE THEREFOR
The invention relates to a confinement silicon dioxide/multi-walled carbon nanotube composite material, and a preparation method and use therefor. The method comprises the following steps: S1, dispersing multi-walled carbon nanotubes in a methyl substituted benzene solvent, and carrying out ultrasonic treatment for 10 minutes at room temperature; S2, after finishing the ultrasonic treatment, adding silicon tetrachloride liquid into the multi-walled carbon nanotube/xylene turbid liquid, and carrying out ultrasonic treatment for 10 minutes at room temperature; S3, heating the mixture in an oil bath to 145 °C, and performing backflow operation; S4, after finishing the reaction, free cooling to room temperature, and centrifuging, washing and drying the obtained solid to obtain a dried sample, thereby obtaining a confinement silicon dioxide/multi-walled carbon nanotube composite material. The confinement silicon dioxide/multi-walled carbon nanotube composite material has excellent charge-discharge rate performance and cycle stability, and has great application potential and industrial value.
Disclosed are a device and method for the laser shock strengthening of an aero-engine blade, which is characterized in that: the device comprises a high-energy pulse laser, a constraining layer, an absorption layer, a contact film and a region of an aero-engine blade to be treated; the device mainly places a high-strength and high-elasticity metal in conventional laser shock strengthening to obtain the contact film, and staggeringly and parallelly arranged micro-kidney-shaped holes are provided on the contact film; and the long sides of the kidney-shaped holes are parallel to an air intake edge of the engine blade. Since the materials inside of said micro-kidney-shaped holes are not affected by laser shock waves, micro-protrusions having a height of 2-3 μm will be formed during the strengthening process; meanwhile, staggeringly arranged compressive stress-tensile stress regions are formed, which may effectively suppress fatigue cracks and greatly improve the fatigue service life of the aero-engine blade. The present invention may be applied to the strengthening treatment of aero-engine blades.
C21D 10/00 - Modifying the physical properties by methods other than heat treatment or deformation
C21D 11/00 - Process control or regulation for heat treatments
43.
SLUDGE TREATMENT TECHNOLOGY AND RAPID SLUDGE TREATMENT METHOD USING FLOCCULATION-HORIZONTAL DRAIN BOARD VACUUM PRELOADING COMBINING WITH MULTI-LAYER SEALED GEOTEXTILE BAG
In the invention, a sludge treatment technology adopting flocculation-horizontal drain board vacuum preloading combining multi-layer sealed geotextile bag is disclosed, which comprises sealed geotextile bags and a geomembrane for sludge grouting and filling. The sealed geotextile bag and the geomembrane have two splicing modes, one is to place a layer of geomembrane inside and close to the inner side of the sealed geomembrane; the other is to wrap and seal the outside of the geotextile with geomembrane. A horizontal drainage system for vacuum drainage is set inside the sealed geotextile bag, with one end of the horizontal drain board being connected to a vacuum drainage pipe, and the drainage pipe passes through the sealed geotextile bag via a flange and is connected to the vacuum pump used for pumping the water in the sealed geotextile bag. Sludge includes engineering waste mud, river sludge and industrial sludge. A horizontal drainage system is added inside the sealed geotextile bag and combining with flocculant for sludge dewatering, and the sealed geotextile bag can be stacked in several layers to form a stacking effect on the lower structure through the self weight of the upper layer, thus making the drainage effect faster and the dewatering efficiency higher.
A reliable multi-information entropy PUF for Internet of Things security includes a control circuit, a data register, 128 glitch generation circuits, a 128-to-1 multiplexer, and a Schmidt glitch sampling module. The control circuit controls the data register to generate a square signal, the 128 glitch generation circuits to generate glitch signals to be output and the 128-to-1 multiplexer to select the glitch signals to be output. The Schmidt glitch sampling module samples the glitch signals to obtain PUF response outputs. Each glitch generation circuit generates a glitch signal by means of a fully symmetrical structure. The Schmidt glitch sampling module comprises a first PMOS transistor, a second PMOS transistor, a third PMOS transistor, a fourth PMOS transistor, a first NMOS transistor, a second NMOS transistor, a third NMOS transistor, a fourth NMOS transistor, a buffer module and a D flip-flop.
H03K 19/17768 - Structural details of configuration resources for security
H03K 19/173 - Logic circuits, i.e. having at least two inputs acting on one outputInverting circuits using specified components using elementary logic circuits as components
H03K 19/17736 - Structural details of routing resources
45.
Adaptive anti-aging sensor based on cuckoo algorithm
An adaptive anti-aging sensor based on a cuckoo algorithm, comprising a control module, a reference voltage-controlled oscillator, two shaping circuits, a frequency difference circuit, a resolution adjustment circuit, a 16-bit counter, a parallel-to-serial circuit, an adaptive module, and a digital-to-analog converter. A lookup table is prestored in the adaptive module; when aging monitoring is performed on a voltage-controlled oscillator in an integrated circuit, the adaptive module uses the cuckoo algorithm to determines the optimal working voltage of the currently monitored voltage-controlled oscillator, and the control module accordingly changes the input voltage of the voltage-controlled oscillator of the integrated circuit. The present invention has the advantages that the degree of aging of the integrated circuit is reflected by monitoring the degree of aging of the voltage-controlled oscillator in the integrated circuit, and the optimal working voltage of the voltage-controlled oscillator in the integrated circuit is adaptively adjusted.
Disclosed is an ML attack resisting method for a strong PUF. Response signals generated by applying multiple sets of different challenge signals to a strong PUF are used as information to be encrypted, and are put in order to form a plaintext matrix. Then a matrix multiplication operation is performed on two plaintext matrixes to generate a ciphertext matrix. Next, elements in a transform matrix obtained by performing binary transformation on the ciphertext matrix are used as final responses, which are in one-to-one correspondence with original challenge signals and are used as final CRPs of the matrix-encrypted strong PUF.
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
G06F 21/75 - Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation, e.g. to counteract reverse engineering
Wireless detection device and wireless detection method for quickly positioning throw-fill stone falling depth and long-term settlement in blasting silt-squeezing construction
Disclosed is a wireless detection device for quickly positioning a throw-fill stone falling depth and long-term settlement in blasting silt-squeezing construction, including a gravity ball and a signal receiving, processing and controlling system. The gravity ball is internally provided with test mechanisms, signal collecting and transmitting apparatuses and batteries. Also disclosed is a wireless detection method implemented using the above wireless detection device. The device and the method can detect the throw-fill stone falling depth and distribution situation in a blasting silt-squeezing construction process in real time, so that the effect evaluation and quality control of blasting silt-squeezing can be monitored in real time, the situation that the falling of throw-fill stones is incomplete can be acquired in time, monitoring data support can be provided for corresponding processing measures, and long-term settlement and other monitoring can be carried out.
Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology (China)
Wenzhou University (China)
Inventor
Liu, Bideng
Yang, Yongli
Wu, Yubin
Song, Ruixiang
Wu, Qiong
Abstract
The present invention discloses a bidirectional collapse-proof damper with a macroscopic NPR structure and a bridge structure having the same, comprising a sleeve and a sliding rod; by adding a structure of a reducing part and a limiting body, a sliding gap exists between both ends of the limiting body and both inner ends of the reducing part; the rod body is connected with the inner side wall of the sleeve through an elastic element; the limiting body and the rod body can realize bidirectional slip in the sleeve, which have multi-level seismic performance.
F16F 15/04 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means
The disclosure is a medical disease feature selection method based on an improved salp swarm algorithm. The improved salp swarm algorithm is used to optimize a feature selection problem, the accuracy of the mentioned method is estimated by means of a transfer function and classification by a K-nearest neighbor algorithm, and the salp swarm algorithm is improved by using a self-adapted control parameter and an elite grey wolf ruling policy, so that it helps the algorithm avoid premature convergence in the optimization process and jump out of local optimum, thereby achieving a target of the algorithm with the smallest selected feature quantity and the highest classification precision. The method has the advantages of high rate of convergence, higher classification precision and better robustness.
G06N 3/12 - Computing arrangements based on biological models using genetic models
G06K 9/62 - Methods or arrangements for recognition using electronic means
G16H 10/40 - ICT specially adapted for the handling or processing of patient-related medical or healthcare data for data related to laboratory analysis, e.g. patient specimen analysis
G16H 50/20 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems
50.
Multi-threshold segmentation method for medical images based on improved salp swarm algorithm
The invention discloses a multi-threshold segmentation method for medical images based on an improved salp swarm algorithm. A two-dimensional histogram is established by means of a grayscale image of a medical image and a non-local mean image, then a salp swarm algorithm is used to determine thresholds selected by a Kapur entropy-based threshold method, and the salp swarm algorithm is improved and mutated by an individual-linked mutation strategy during the threshold selection process to avoid local optimization, so that the segmentation effect on the medical image is optimized; and the method has the advantages of good robustness and high accuracy.
Experimental setup for measuring the vacuum degree and pore pressure at a point of soil mass in vacuum consolidated state and the test operation method thereof
An experimental setup for measuring the vacuum degree and pore pressure at a point of soil mass in vacuum consolidated state, including a connecting tube, the connecting tube includes an upper water storage tube, a middle tube, the middle tube is loaded with an upper experimental soil mass, the lower tube is loaded with a lower experimental soil mass, a water storage chamber is connected to a pumping mechanism, an intermediate inner chamber is connected to a negative pressure vacuum gauge, the inlet conduit is connected to a negative pressure vacuum gauge. Additionally, the present invention provides a test operation method. The device measures the vacuum degree of upper part of experimental soil mass by observing the reading in the negative pressure vacuum gauge.
Technology Institute of Wenzhou University in Yueqing (China)
Inventor
Wu, Ziran
Wu, Guichu
Lin, Zhenquan
Yan, Juntao
Sun, Yuelei
Abstract
A leakage measurement error compensation method based on cloud-edge collaborative computing is implemented on a communication network formed by an interconnection between a leakage current edge monitoring terminal and a power consumption management cloud platform. The method includes the following steps: iteratively training, by the power consumption management cloud platform, a pseudo-leakage compensation model by using the received leakage current data, continuously updating pseudo-leakage model parameters, and feeding the pseudo-leakage model parameters back to the leakage current edge monitoring terminal; and processing, by the leakage current edge monitoring terminal, the leakage current data according to the pseudo-leakage compensation model parameters.
G06F 21/55 - Detecting local intrusion or implementing counter-measures
G06F 18/2413 - Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches based on distances to training or reference patterns
G06N 7/02 - Computing arrangements based on specific mathematical models using fuzzy logic
Novosphingobium sp. SJB007 provided by the invention has a high removal rate of more than 97% when the concentration of phosphorus in the wastewater is 10-30 mg/L under an appropriate condition.
A microfocus field emission electron source based on a carbon nanotube, and a preparation method therefor. The method comprises the following steps: (1) applying a metal platinum layer onto the surface of a nickel substrate; (2) under the protection of a protective gas, performing, by using a pulse laser and in a negative defocusing mode, point ablation on the surface of the nickel substrate that is plated with metal platinum, wherein the focus of the laser is inside the nickel substrate during negative defocusing ablation, so that internal nickel metal is melted, flows to the surface of the nickel substrate under a pushing force of nickel metal vapor, and forms a spherical shell after being cooled; and (3) directly growing, by using a chemical vapor phase deposition method, a carbon nanotube cathode film on the spherical shell, which is formed by means of laser ablation, of the nickel substrate. The microfocus electron source has the advantages of a low turn-on electric field (<1 V/μm), a high current density (~ 1 A/cm2), good high-pressure emission operation stability, etc.
A strong and weak hybrid PUF circuit comprises N switch units and an arbiter. Each switch unit consists of two delay modules and two 2:1 multiplexers. The N switch units constitute two completely symmetrical delay paths. Each delay module consists of six stages of delay cells. During the operating process, a transmission signal selects a turn-on path of the corresponding 2:1 multiplexers according to activation signals; the switch units in the PUF circuit are in a valid state (if the delay modules are turned on) or in an invalid state (if the delay modules are not turned on) according to whether the delay modules are turned during the operating process; and the strong and weak hybrid PUF circuit can be flexibly configured to be of two different types (a strong PUF circuit and a weak PUF circuit) according to changes of the Hamming weight of input activation signals.
H03K 19/003 - Modifications for increasing the reliability
H03K 19/21 - EXCLUSIVE-OR circuits, i.e. giving output if input signal exists at only one inputCOINCIDENCE circuits, i.e. giving output only if all input signals are identical
The present invention provides an optimizing growth method for improving quality of MOCVD epitaxial thin films, including the following method: step 1, putting a substrate and a thin film A to a reaction chamber of an MOCVD equipment; and feeding a compound containing an element X as an X source under the condition that the reaction chamber is filled with H2; configuring a temperature, reaction chamber pressure and deposition time within a parameter range where the gaseous compound can decompose X atoms; pre-depositing an X atomic layer on a surface of the substrate or the thin film A; the X atomic layer is adsorbed on the substrate or thin film A at this time; and the X atomic layer can be reacted with other compounds to generate a thin film B component in the follow-up process, or can directly form a thin film B component with the thin film A.
A reaction of azacyclopropane derivative with elemental selenium and TMSCN to construct a selenium-containing heterocycle under metal-free and additive-free conditions is provided. The new strategy features no metal participation, no additive promotion, a wide substrate selection range and a good functional group compatibility, and provides an efficient and green approach to constructing a variety of selenium-containing heterocyclic compounds in a highly concise way.
C07D 293/02 - Heterocyclic compounds containing rings having nitrogen and selenium or nitrogen and tellurium, with or without oxygen or sulfur atoms, as the ring hetero atoms not condensed with other rings
C07D 293/10 - Heterocyclic compounds containing rings having nitrogen and selenium or nitrogen and tellurium, with or without oxygen or sulfur atoms, as the ring hetero atoms condensed with carbocyclic rings or ring systems
58.
METHOD FOR IDENTIFYING PARAMETERS OF PHOTOVOLTAIC CELL HAVING SINGLE DIODE STRUCTURE
Disclosed in the present invention is a method for identifying parameters of a photovoltaic cell having a single diode structure, comprising: measuring an actual output voltage and an actual output current of a photovoltaic cell having a single diode structure at a given temperature and illumination intensity, then constructing an ideal model of the photovoltaic cell having the single diode structure, determining parameters to be identified, establishing a target function, and finally, identifying the parameters by using a sine-cosine mechanism-based backtracking search algorithm to obtain data of the parameters of the photovoltaic cell having the single diode structure, thereby completing identification of the parameters of the photovoltaic cell having the single diode structure. The method has the advantages that parameters are identified by adopting a backtracking search algorithm, a variation operation in the backtracking search algorithm is replaced by a sine-cosine mechanism in the identification process, ignoring part of an optimal search space is avoided, and parameters of a photovoltaic cell having a single diode structure are more reliable and can be more accurately identified.
An MOCVD device, comprising a top cover (1) with a circular radial section, a top cover panel (2), a base (3), and lining supports (4). The upper surface of the top cover panel (2) is embedded into the bottom of the top cover (1), and the lower surface of the top cover panel (2) is a curved surface (5) which is thin in the middle and thick in two sides. A gas pipeline (6) is provided in the vertical direction of the center of the top cover (1), and the lower end of the gas pipeline (6) extends to the center of the base (3). A plurality of layers of circumferentially-arranged gas outlet holes (7) are formed in the side wall of the gas pipeline (6). By means of the top cover panel (2), the edge and the central position are stressed more uniformly, and the growth rates of films are closer, such that the uniformity of the films is improved.
C23C 16/455 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into the reaction chamber or for modifying gas flows in the reaction chamber
C23C 16/44 - Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
A system synchronization method includes: connecting synchronization modules of a plurality of devices together through a synchronization bus. The synchronization modules include a signal generation module, a switch control module, a synchronization bus monitoring module, and a switch S1. A signal output terminal of the signal generation module is connected to a first terminal of the switch S1, and a timing overflow terminal of the signal generation module is connected to the switch control module configured to control the switch S1. The switch control module is connected to the synchronization bus monitoring module. A second terminal of the switch S1 is connected to the switch control module and the synchronization bus monitoring module. The system synchronization method has the advantages of simple structure, low cost, high reliability, and good practicability.
H04J 3/16 - Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
An adaptive anti-aging sensor based on a cuckoo search algorithm, comprising a control module, a reference voltage-controlled oscillator, two shaping circuits, a frequency difference circuit, a resolution adjustment circuit, a 16-bit counter, a parallel-to-serial circuit, an adaptive module, and a digital-to-analog converter. A look-up table is prestored in the adaptive module; when aging monitoring is performed on a voltage-controlled oscillator in an integrated circuit, the adaptive module uses the cuckoo search algorithm to determine the optimal working voltage of the currently monitored voltage-controlled oscillator, and the control module accordingly changes the input voltage of the voltage-controlled oscillator of the integrated circuit. The present invention has the advantages that the degree of aging of the integrated circuit is reflected by monitoring the degree of aging of the voltage-controlled oscillator in the integrated circuit, and the optimal working voltage of the voltage-controlled oscillator in the integrated circuit is adaptively adjusted for adaptive aging repair of the voltage-controlled oscillator in the integrated circuit, so that the aging repair for the integrated circuit at different degrees of aging can be satisfied, the purpose of anti-aging of the integrated circuit is finally achieved, and the application range is wide.
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
62.
Device for extracting polysaccharide from acaudina molpadioides
Acaudina molpadioides is provided, which includes a mixing box, a blocking cover, a feed pipe group, a discharge pipe, a bottom plate, a side plate, a first motor, a first transmission shaft, two drive shafts, a first circular gear, two second circular gears, two rotary discs, two connecting frame groups, two semiarc rotary discs, a slide bar, a stop collar, a fixed link, a baffle, a first bushing group and a first sleeve spring group. A top side wall and a rear lower side of the mixing box are communicated with the feed pipe group and the discharge pipe, respectively. Front side and rear sides of the slide bar are longitudinally connected with multiple first engaging teeth. Both the two semiarc rotary discs are connected with multiple second engaging teeth. The fixed link is connected between the stop collar and the slide bar.
The present disclosure discloses a monitoring device for internal deformation and fine particle loss of a railway subgrade, relating to the field of monitoring devices. The monitoring device includes an internal damage monitoring device arranged in a subgrade ballast layer. The internal damage monitoring device is connected to a resistance acquisition instrument through a wire. The resistance acquisition instrument is in wireless connection with a resistance signal receiver. The monitoring device for internal deformation and fine particle loss of a railway subgrade provided by the present disclosure can remotely realize real-time continuous monitoring of the deformation and fine particle loss inside the railway subgrade under a rail transit load, is economical and convenient, and has high practice value.
The present disclosure discloses a device for centrifuge testing of a driven pile in different installation and pull-out modes, including a supporting system, a pile driving system, a pile-soil system and a measurement and acquisition system. The present disclosure further provides a method for operating the device for centrifuge testing of a driven pile in different installation and pull-out modes. The present disclosure can perform geotechnical centrifuge testing of a driven pile through penetration in different installation modes and pull-out in different pull-out modes, and provide the effective test device and method for study of a pile-soil mutual dynamic response during a whole process of penetration and a process of pull-out of the driven pile. Moreover, pile-soil deformation characteristics and the like during the processes of penetration and pull-out can be visually observed through a high-speed camera or a digital camera, and the pull-out and penetration can be tested separately.
A nonlinear magnetic force-based arched piezoelectric ceramic energy harvesting deceleration strip, which comprises an outer case and an internal generating mechanism. The outer case structure comprises an upper deceleration strip and a casing. The casing is embedded in the pavement structure by excavating the upper part of surface course. A rebounding mechanism is located between the upper deceleration strip and casing to restore the pressed upper deceleration strip. Features: the generating mechanism comprises a rack, a gear set and generating discs. The rack is disposed at the bottom of the upper deceleration strip and moving up and down therewith. The rack can drive the gear set to generate acceleration, and the transmission shafts drive the left and right generating discs to rotate. The gear set is combined with three transmission shafts.
H02N 2/18 - Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
A horizontal-vertical drain board-flocculation vacuum preloading sediment treatment method, including (1) electro-osmotic electrodes disposed on the top and bottom of each reinforcing bar of the reinforced frame; (2) after the sediment is blown to the bottommost layer of vacuum preloading tank, the support is fitted over each reinforced frame, and the clips are fastened; (3) the transverse drain board passes through the support, one end of transverse drain board is connected to a curved tube; (4) repeat Step 2 and Step 3 until the sediment is blown to the surface layer of vacuum preloading tank; (5) a vertical drain board is arranged vertically between two adjacent rows of reinforced frames; (6) the curved tube is connected to the first junction block through the second junction block, and then the geotextile and sealing film are laid, the vacuum pump and power supply are switched on at last.
A road traffic and wind energy cogeneration system, comprising an energy conversion device and a road bearing mechanism, wherein the road bearing mechanism has a container, the container includes a case and a top cover; a piston is disposed in the case; an elastic chamber is disposed between the piston and a bottom wall of the case; the elastic chamber is filled with liquid; a guide column is fixed to the piston; the guide column penetrates upwards through the top cover to be fixed to a road pressure plate; an elastic mechanism is disposed between the piston and case bottom; an air cavity is formed between the top cover and piston; tire air cavity is connected to the wind power installation through the conduit; the elastic chamber is connected to a water flow power installation through the conduit.
F03D 9/00 - Adaptations of wind motors for special useCombinations of wind motors with apparatus driven therebyWind motors specially adapted for installation in particular locations
A matching control method for mechanical impedance of a magnetostrictive precision transducer includes developing a three-layer neural network model corresponding to a Young's modulus of a Terfenol-D material; acquiring sample data to form a training sample set and a testing sample set; training the model using a Bayesian regularization training algorithm, and optimizing connection weights and thresholds among layers of the tested model, so as to obtain a final three-layer neural network model; based on the final model, building an inverse model of mechanical impedance of the magnetostrictive precision transducer; using a current level of impedance of a load as an input of the inverse model to obtain a bias magnetic field, and changing a level of the bias magnetic field by changing a bias current in an excitation coil of the transducer, thereby achieving adaptive matching between the mechanical impedance of the transducer and the impedance of the load.
The present invention provides an online laser leveling detection method of a 3D printer. The method comprises: (1), arranging a bar-shaped triangular reflecting prism and a bar-shaped photoelectric receiver; (2), fixedly mounting a laser emitter and a plane mirror on the side face of a printer head; (3), with the aid of a detection laser beam, fine tuning the mounting azimuths of an X-axis guide rail, a Y-axis guide rail, and the printer head till the motion levelness of the printer head is adjusted to meet requirements of the design accuracy of the printer; (4), with the aid of the detection laser beam, fine tuning the mounting azimuth of a printing platform till the mounting levelness of the printing platform is adjusted to meet the requirements of the design accuracy of the printer; (5), starting the 3D printing program; (6), in the printing process, detecting in real time whether a nozzle of the printer head generates faults including material blockage, shortage, and breakage. The present invention communicates detection signals of a laser detection system with a printer control system and designs the signal processing program to achieve detection of the motion levelness and the mounting levelness as well as monitoring of extrusion faults of the printer head.
B29C 64/118 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
INSTITUTE OF LASER AND OPTO ELECTRONICS MANUFACTURING, WENZHOU UNIVERSITY (China)
WENZHOU UNIVERSITY (China)
Inventor
Zhong, Rong
Zhou, Jianhua
Sun, Haoran
Qiu, Chenggong
Pan, Xiaoming
Zheng, Beirong
Wang, Yangbo
Abstract
Provided is a method for preparing zinc oxide quantum dots by ultrasonic wave assistance in solute incomplete dissolution mode, comprising the following steps: step 1: placing zinc-containing inorganic salt in an alcohol organic solvent in an ultrasonic wave environment to form a ZnO precursor suspension A; step 2: fully dissolving strong alkali in the alcohol organic solvent in a stirring environment to obtain a clear solution B; step 3: in the ultrasonic wave environment, adding the clear solution B obtained in step 2 dropwise to the suspension A obtained in step 1, and a full reaction is achieved in the ultrasonic wave environment, the reaction time is 10-40 min to obtain a solution C; step 4: adding the solution C after reaction in step 3 to a nonpolar solvent, carrying out static precipitation, after centrifugation at a certain speed, removing the supernatant, to obtain an initial precipitate, then adding the alcohol organic solvent, and dispersing the precipitate in the ultrasonic wave environment; step 5: repeating step 4 for twice or more to obtain a pure ZnO quantum dot precipitate; step 6, placing the ZnO quantum dot precipitate obtained in step 5 in a vacuum dryer for annealing treatment to obtain ZnO powder.
A control flow attacks based on return address signatures comprises: using a return address as a push return address when a response is given to an interrupt service routine; generating an encrypted push return address by an XOR encryption circuit by means of an n-bit binary key generated by a pseudo random number generator; then, generating a push_address signature value by an MD algorithm signature circuit; when the response to the interrupt service routine is over, reading an n-bit binary address out of a stack to serve as a pop return address; generating an encrypted pop return address by the XOR encryption circuit; generating a pop address signature value by the MD algorithm signature circuit; comparing the push_address signature value with the pop address signature value; and determining whether or not a data processor is under a control flow attack according to a comparison result.
G06F 21/52 - Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems during program execution, e.g. stack integrity, buffer overflow or preventing unwanted data erasure
G06F 7/58 - Random or pseudo-random number generators
G06F 9/30 - Arrangements for executing machine instructions, e.g. instruction decode
G06F 9/38 - Concurrent instruction execution, e.g. pipeline or look ahead
G06F 9/48 - Program initiatingProgram switching, e.g. by interrupt
H04L 9/06 - Arrangements for secret or secure communicationsNetwork security protocols the encryption apparatus using shift registers or memories for blockwise coding, e.g. D.E.S. systems
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
G06F 21/54 - Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems during program execution, e.g. stack integrity, buffer overflow or preventing unwanted data erasure by adding security routines or objects to programs
72.
Digital-twin modeling method for automated testing pipeline for circuit breakers
A digital-twin modeling method for an automated testing pipeline for circuit breakers involves acquiring a three-dimensional digitalized model of each mechanical installation in the testing pipeline; modeling hierarchy according to an actual production process and motion states; performing mesh optimization on the resulting model; designing movements of each said mechanical installation, so as to obtain mechanical movement tracks of the models; combining actual movement logic and cooperative relationship among the movements to edit the mechanical movement tracks of the models; and introducing motion control, so as to conduct motion simulation in a digital-twin scene, thereby implementing virtual movements synchronous with movements of the actual testing pipeline. The method realizes centralized management of production data of the pipeline and realizes remote visualized operation, management and maintenance of the testing pipeline, thereby providing a basic platform for digitalized production of miniature circuit breakers.
G06F 30/20 - Design optimisation, verification or simulation
G01R 31/327 - Testing of circuit interrupters, switches or circuit-breakers
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
G05B 17/00 - Systems involving the use of models or simulators of said systems
73.
FEMTOSECOND LASER-MACHINING HOLE DRILLING DEVICE HAVING CONTROLLABLE TAPER, AND HOLE DRILLING PROCESS THEREOF
LYNCWELL INNOVATION INTELLIGENT SYSTEM (ZHEJIANG) CO., LTD (China)
Inventor
Li, Fengping
Feng, Guang
Li, Xiaogang
Ma, Guang
Xue, Yao
Zhong, Rong
Zhu, Dehua
Pang, Jihong
Lin, Liqu
Lu, Chengji
Abstract
A femtosecond laser-machining hole drilling device having controllable taper, and hole drilling process thereof. The device comprises a femtosecond laser (1) and a precision motion platform (2). A support mechanism (3) is provided on a main shaft of the precision motion platform (2). A holder (4) is provided at a top portion of the support mechanism (3). An output end of the femtosecond laser (1) is provided with a beam expander (5), and an output end of the beam expander (5) is provided with a reflector (6). An output end of the reflector (6) is provided with a beam scanning module (7). An output end of the beam scanning module (7) is provided with a semi-focusing lens (18). An output end of the semi-focusing lens (18) is provided with a semi-transparent reflector (8) arranged at 45 degrees. A reflection output end of the semi-transparent reflector (8) is provided with a high-precision three-dimensional online monitoring module (9). A transmission output end of the semi-transparent reflector (8) directly faces the holder (4) on the precision motion platform (2). The invention uses the high-precision three-dimensional online monitoring module (9) to perform real-time detection on a beam bias amount during a machining process and performs corresponding adjustment.
WENZHOU POWER SUPPLY COMPANY, STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD. (China)
PINGYANG COUNTY POWER SUPPLY COMPANY, STATE GRID ZHEJIANG ELECTRIC POWER CO., LTD. (China)
WENZHOU UNIVERSITY (China)
Inventor
Zhu, Xiang'Ou
Xu, Yu
He, Zhiwen
Dai, Yuxing
Abstract
Disclosed is a system and method for large-current power supply and constant-current control. Large-current power supply includes: primary power supply, energy-feedback circuit and direct-current (DC) large-current generator; energy-feedback circuit includes freewheel diode and magnetic reset winding; and secondary coil of DC large-current generator is connected to load. Without output rectifier diode and filter capacitor at load end of large-current power supply provided herein, power consumption problem of output rectifier diode at large current is unnecessarily considered, and electrolytic capacitor is not needed for filtration; and therefore, service life of power supply is greatly prolonged, larger current is output by extending, and power supply has advantages of simple circuit, small size, easy control and high working reliability. By adopting control method and system provided herein, an output voltage of Buck circuit in primary power supply is accurately controlled, and thus large-current power supply obtains a constant output current at load end.
G05F 1/62 - Regulating voltage or current wherein the variable actually regulated by the final control device is DC using bucking or boosting DC sources
G05F 1/565 - Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
G05F 1/569 - Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
G05F 1/563 - Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices including two stages of regulation, at least one of which is output level responsive, e.g. coarse and fine regulation
G05F 1/573 - Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
75.
Construction method of reclaiming land from the sea based on basement utilization
A construction method of reclaiming land from the sea based on the basement utilization, which implementation steps are as follows: a. installing a dike along the coastline, enclosing a central reclamation area by the dike and the coastline; b. installing crisscross enclosures in the central reclamation area, dividing the central reclamation area into a mesh area by the enclosure and the dike; c, pumping drainage of seawater in a block area in the mesh area, forming land in the block area; d. constructing the enclosure in the mesh reclamation area, using the enclosure and subsidiary roads to form road arteriality; the block area being lower than the height of the enclosure, constituting a grid-like high-road/low-land land supply mode; e. developing the block area into an underground space area.
A method for synthesizing a chiral β-hydroxy acid ester compound is disclosed. The method includes the steps of: using an aldehyde compound and a monoalkyl malonate as raw materials, using a metal and a chiral ligand as a catalyst to make the raw materials be directly and fully reacted in an organic solvent and form a reaction solution, and separating and purifying the reaction solution to obtain the highly stereoselective β-hydroxy acid ester compound. The beneficial effects are mainly embodied in: 1. simple operation; 2. rapidly constructing a highly stereoselective β-hydroxy acid ester skeleton structure molecule; 3. high reaction yield and good stereoselectivity. Therefore, the invention has high basic research significance, industrial production value and social economic benefit.
C07C 67/31 - Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by introduction of functional groups containing oxygen only in singly bound form
B01J 31/18 - Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony
C07C 69/675 - Esters of carboxylic acids having esterified carboxyl groups bound to acyclic carbon atoms and having any of the groups OH, O-metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids of saturated hydroxy-carboxylic acids
77.
Method for integrated optimization of ternary FPRM circuit
A method for integrated optimization of a ternary FPRM circuit comprises: establishing an area estimation model, a power consumption estimation model and a delay estimation model of a ternary FPRM circuit under a p polarity; constructing a correlation between a multi-objective teaching-learning optimization algorithm and optimization of an area, power consumption and a delay of the ternary FPRM circuit; expressing positions of the individuals in the multi-objective teaching-learning optimization algorithm as polarities of the ternary FPRM circuit, and expressing a search space as a space for polarity selection of the ternary FPRM circuit; and finally, searching for a set of Pareto optimum polarity solution for the area, power consumption and delay of the ternary FPRM circuit by means of the multi-objective teaching-learning optimization algorithm to complete the optimization of the area, power consumption and delay for the ternary FPRM circuits.
A true random number generator with stable node voltage comprises a loop control logic, two inverters identical in structure, two D flip-flops identical in structure, a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, a monitoring module and a post-processing module. Each inverter comprises a second NMOS transistor, a third NMOS transistor, a fourth NMOS transistor, a fifth NMOS transistor, a sixth NMOS transistor, a seventh NMOS transistor, an eighth NMOS transistor, a ninth NMOS transistor, a tenth NMOS transistor, a third PMOS transistor, a fourth PMOS transistor, a fifth PMOS transistor, a sixth PMOS transistor, a seventh PMOS transistor, an eighth PMOS transistor, a ninth PMOS transistor, a tenth PMOS transistor and an eleventh PMOS transistor. The true random number generator has the advantages of being able to eliminate the capacitive coupling effect and has high randomness.
A pressurized turbulent mixing device, comprising a pressurizing pump (1), a liquid suction pipe (11) and a liquid outlet pipe (12), and further comprising a cylinder tube (2) closed at both ends, wherein a hollow pipe (3) with two open ends is arranged inside the cylinder tube (2); the hollow pipe (3) is provided thereon with a nozzle (31) capable of spraying the inner surface of the cylinder tube (2); one end of the cylinder tube (2) is connected to the liquid outlet pipe (12), and the other end thereof is provided with an output pipe (4). Also disclosed is a liquid treatment method, a cyanobacteria treatment device and a cyanobacteria treatment method.
A carbon nanotube ternary SRAM cell with an improved stability and low standby power comprises a write bit line, a read bit line, a column select bit line, an inverted column select bit line, a write word line, an inverted write word line, a read word line, an inverted read word line, a first P-type CNFET, a second P-type CNFET, a third P-type CNFET, a fourth P-type CNFET, a fifth P-type CNFET, a sixth P-type CNFET, a seventh P-type CNFET, an eighth P-type CNFET, a ninth P-type CNFET, a first N-type CNFET, a second N-type CNFET, a third N-type CNFET, a fourth N-type CNFET, a fifth N-type CNFET, a sixth N-type CNFET, a seventh CNFET, an eighth N-type CNFET and a ninth N-type CNFET. The carbon nanotube ternary SRAM cell has the advantages of being lower in power consumption, capable of solving the half-select problem and the read-disturb problem and high in static noise margin.
G11C 11/412 - Digital stores characterised by the use of particular electric or magnetic storage elementsStorage elements therefor using electric elements using semiconductor devices using transistors forming cells with positive feedback, i.e. cells not needing refreshing or charge regeneration, e.g. bistable multivibrator or Schmitt trigger using field-effect transistors only
G11C 11/417 - Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing, timing or power reduction for memory cells of the field-effect type
G11C 11/56 - Digital stores characterised by the use of particular electric or magnetic storage elementsStorage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
H01L 27/28 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
81.
True random number generator with dynamic compensation capability
A true random number generator with a dynamic compensation capacity comprises a loop control logic, a shift register, a sensitive amplifier and a load matching unit. The sensitive amplifier comprises a first PMOS transistor, a second PMOS transistor, a third PMOS transistor, a fourth PMOS transistor, a first NMOS transistor, a second NMOS transistor and two NMOS arrays. Each NMOS array comprises a third NMOS transistor, a fourth NMOS transistor, a fifth NMOS transistor, a sixth NMOS transistor, a seventh NMOS transistor, an eighth NMOS transistor, a ninth NMOS transistor, a tenth NMOS transistor, an eleventh NMOS transistor, a twelfth NMOS transistor and a thirteenth NMOS transistor. The load matching unit comprises a first D flip-flop and a second D flip-flop and is connected at an output terminal and an inverted output terminal of the sensitive amplifier. The true random number generator has the advantages of simple feedback regulation and high robustness.
Provided is a sheet-shaped nitrogen-phosphorus co-doped porous carbon material, prepared and obtained according to the following method: mixing aniline and hexachlorocyclotriphosphazene, undergoing a closed reaction for 2-24 h at a pressure of 1-10 MPa and a temperature of 140-260° C., then pressure is released to atmospheric pressure and steam drying is performed to obtain a solid substance; under inert gas protection, the obtained solid substance is treated for 1-6 h at a high temperature of 400-1000° C., and the finished product is obtained; the sheet-shaped nitrogen-phosphorus co-doped porous carbon material thus provided has excellent electrical properties and may be used for fabricating capacitor electrodes and especially supercapacitor electrodes; thus it may be used in capacitors and especially supercapacitors, and has great application potential and industrial value in the field of energy storage.
H01G 11/00 - Hybrid capacitors, i.e. capacitors having different positive and negative electrodesElectric double-layer [EDL] capacitorsProcesses for the manufacture thereof or of parts thereof
C01B 32/05 - Preparation or purification of carbon not covered by groups , , ,
H01G 11/24 - Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosityElectrodes characterised by the structural features of powders or particles used therefor
An LED lighting based multispectral imaging system for color measurement is provided, including a main control computer and an enclosed type lamp box, where a digital camera is provided at the top of the lamp box, and an LED lamp set control apparatus, a drawer type bearing platform, and an LED lamp set are provided at the bottom of the lamp box. A to-be-measured object is placed on the drawer type bearing platform. The main control computer controls spectral power distribution of the LED lamp set to be in a reciprocal relationship with a spectral sensitivity curve of the digital camera and extracts a camera response and performs calculation, to obtain spectral reflectivity of each pixel of the to-be-measured object.
The present invention discloses a system for consolidating soft clay by combined anode boosting and electro-osmosis, comprising a vacuum preloading system, wherein the vacuum preloading system comprises anode tubes, cathode tubes, a power supply, a boosting device, sealing cloth and a pumping and drainage device; the sealing cloth is covered above soft clay; air vents are formed on side faces of the cathode tubes and the anode tubes; the cathode tubes and the anode tubes are connected to a boosted pumping and drainage pipe above the soft clay through pipelines; the boosted pumping and drainage pipe is configured with the boosting device and the pumping and drainage device; and, the anode tubes and the cathode tubes are connected to an anode and a cathode of the power supply, respectively. The present invention further provides a method for consolidating soft clay by using the system for consolidating soft clay by combined anode boosting and electro-osmosis. In the present invention, after the anode tubes are configured with a boosting device, a gas can be fed into the anode tubes; under the combined action of the high-pressure gas and the anode tubes, water is squeezed to the cathode tubes, so that water can be drained from the soil more thoroughly.
E02D 3/11 - Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electrochemical means
E02D 3/12 - Consolidating by placing solidifying or pore-filling substances in the soil
85.
System for consolidating hydraulic reclamation silt by combined flocculation and deep boosted vacuum preloading, and method for consolidating hydraulic reclamation silt
The present invention discloses a system for consolidating hydraulic reclamation silt by combined flocculation and deep boosted vacuum preloading, comprising an agitation tank, wherein the agitation tank is connected to a flocculant preparation tank and a slurry delivery device; a tank bottom valve and a filter plate mechanism are successively arranged at a lower delivery port of a precipitation zone of a dehydration tank; weep holes are formed on filter plates; there is a discharge zone below the precipitation zone of the dehydration tank; a drainage plate is provided on an upper side wall of the precipitation zone; a water storage coaming is provided outside the drainage plate; the water storage coaming and the drainage plate are enclosed to form a water storage zone; the water storage zone is connected to a reservoir via a second delivery pipe with a second delivery pump provided thereon; a water pumping port is provided within the discharge zone; the water pumping port is connected to the reservoir via a third delivery pipe with a third delivery pump provided thereon; and, the discharge valve below the discharge zone is connected to a deep boosted drainage tank. The present invention further provides a method for consolidating hydraulic reclamation silt by using the system. The system and the method for consolidating hydraulic reclamation silt implemented by the system can more thoroughly discharge water in the slurry, so that the soil becomes drier and harder and can be directly used in the landfill of earthwork; moreover, a greater amount of water can be collected.
Devices used in laboratories to measure horizontal displacement of soil around a foundation to be treated by vacuum preloading, and measurement methods
A laboratory device to measure horizontal displacement of soil around a region treated by vacuum preloading includes a box injected with dredger fill. A vertical drainage board and a vacuum pumping tube are buried within soil in the treatment region in connection with a vacuum degree detector and a vacuum pump. A seal membrane covers soil in the treatment region. A loading device is above the seal membrane. Transverse tubes are inserted into a side of the box and in surrounding soil of the treatment region. An annular sensing source, which moves together with the soil and which is movable along the transverse tubes, sleeved on the transverse tubes. Each transverse tube is provided with a sensing instrument, and the sensing instrument is connected with a sensor is inserted into the transverse tube. The different positions of the sensing source at different moments of time are determined.
A nitrogen, phosphorus, chlorine co-doped carbon material, a preparation method therefor and use thereof. The nitrogen, phosphorus, chlorine co-doped carbon material is prepared by the following steps: S1, mixing a halogenated conjugated diene, a phosphorus source and a heteroaromatic hydrocarbon, and reacting same under high pressure, closed conditions to obtain a first product; S2, cooling, washing, and drying the first product to obtain a second product; and S3, subjecting the second product to a high-temperature treatment in an inert atmosphere, so as to obtain the nitrogen, phosphorus, chlorine co-doped carbon material. The nitrogen, phosphorus, chlorine co-doped carbon material has excellent electrical properties, being able to be used in the field of supercapacitors.
A method for selectively removing monovalent anion impurities from a sulfuric acid system electrolyte solution is provided. The method comprises: adjusting the concentration of ionized H2SO4 in the electrolyte solution, introducing the electrolyte solution containing the ionized H2SO4 into a waste acid chamber of a diffusion dialyzer, introducing water as a receiving liquid to flow into a recovery chamber of the diffusion dialyzer in a reverse flow manner, controlling the flow intensity of the electrolyte solution during the diffusion dialysis operation process, transporting, by means of concentration difference driving, part of the ionized H2SO4 in the electrolyte solution of the diffusion dialyzer and the anion impurities through a membrane to the receiving liquid, forming a monovalent anion impurity-enriched dilute H2SO4 and purified electrolyte solution, wherein an anion exchange membrane is arranged in the diffusion dialyzer; wherein the sulfuric acid system electrolyte solution is selected from at least one of a Zn2+, Mn2+, Cu2+, and Co2+ sulfuric acid system electrolyte solution, and wherein the monovalent anion impurities are at least one of F-, Cl-, Br-, I-, NO3-, and NO2-.
Provided is a sheet-shaped nitrogen-phosphorus co-doped porous carbon material, prepared and obtained according to the following method: mixing aniline and hexachlorocyclotriphosphazene, undergoing a closed reaction for 2-24 h at a pressure of 1-10 MPa and a temperature of 140-260°C, then pressure is released to atmospheric pressure and steam drying is performed to obtain a solid substance; under inert gas protection, the obtained solid substance is treated for 1-6 h at a high temperature of 400-1000°C, and the finished product is obtained; the sheet-shaped nitrogen-phosphorus co-doped porous carbon material thus provided has excellent electrical properties and may be used for fabricating capacitor electrodes and especially supercapacitor electrodes; thus it may be used in capacitors and especially supercapacitors, and has great application potential and industrial value in the field of energy storage.
C01B 32/05 - Preparation or purification of carbon not covered by groups , , ,
H01G 11/24 - Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosityElectrodes characterised by the structural features of powders or particles used therefor
A method and device for strengthening the laser shock of a hidden surface includes establishing a continuous laser shock strengthening track and process after acquiring the information about the whole hidden surface. A control system adjusts the movement and rotation of a total reflection mirror which is arranged in a workpiece according to the signal from signal collecting cards for making a reflected laser beam act on a region to be machined of the hidden surface at an appropriate incidence angle. The method can realize the surface strengthening treatment of the hidden surface of the workpiece, significantly improve the mechanical performance of the workpiece and increase the fatigue life thereof, which is applicable to the surface strengthening of the workpiece with the hidden surface.
B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
B23K 26/03 - Observing, e.g. monitoring, the workpiece
B23K 26/122 - Working by laser beam, e.g. welding, cutting or boring in a special environment or atmosphere, e.g. in an enclosure in a liquid, e.g. underwater
C21D 10/00 - Modifying the physical properties by methods other than heat treatment or deformation
B23K 26/356 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by shock processing
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
91.
Laser shock peening method and device for bottom surface of tenon groove of aircraft blade
A laser shock peening method and device for a bottom surface of a tenon groove of an aircraft blade. During the laser shock peening process, according to geometric characteristics of the bottom surface of a tenon groove, a circular facula of a laser beam is changed into a strip-shaped facula, at the same time as a flow-guiding injection device and a water pumping device are respectively arranged at two end surfaces of the bottom surface of the tenon groove to ensure the stability of a water confinement layer.
B23K 26/356 - Working by laser beam, e.g. welding, cutting or boring for surface treatment by shock processing
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
B23K 26/146 - Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beamNozzles therefor the fluid stream containing a liquid
B23K 26/08 - Devices involving relative movement between laser beam and workpiece
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
92.
METHOD FOR RECOGNIZING TOOL ABRASION DEGREE OF LARGE NUMERICAL CONTROL MILLING MACHINE
A method for recognizing the tool abrasion degree of a large numerical control milling machine. The method comprises: acquiring vibration time domain signals in the running state of the large numerical control milling machine; obtaining frequency domain distribution of the vibration signals by means of a fast Fourier transform; selecting multiple statistical characteristic parameters in the time domain and the frequency domain to perform diffusion mapping method-based dimensionality reduction of tool abrasion characteristic parameters; determining selection of scale parameters of diffusion mapping by using a leave-one-out cross validation method and an optimization search algorithm; and recognizing the abrasion degree of an unknown tool to be measured by combining with an Nystrom expansion and kernel regression algorithm. The disadvantage that a tool abrasion sample of a large numerical control milling machine is absent can be effectively overcome, the recognition accuracy of the tool abrasion degree of the large numerical control milling machine can be improved, and the maintenance cost and time caused by not-timely tool abrasion recognition can be reduced.
A laser shock peening method and device for a bottom surface of a tenon groove of an aircraft blade. During the laser shock peening process, according to geometric characteristics of the bottom surface of a tenon groove, a circular speckle of a laser beam is changed into a strip-shaped speckle, at the same time as a flow-guiding injection device (26) and a water pumping device are respectively arranged at two end surfaces of the bottom surface of the tenon groove to ensure the stability of a water confinement layer.
Disclosed are a method and device for strengthening the laser shock of a hidden surface. The method comprises: using a method similar to machining in segments to establish a continuous laser shock strengthening track and process after acquiring the information about the whole hidden surface; and a control system adjusting the movement and rotation of a total reflection mirror (11) which is arranged in a workpiece (4) according to the signal from signal collecting cards (9, 10) for making a reflected laser beam act on a region to be machined of the hidden surface at an appropriate incidence angle, i.e., an included angle between the reflected laser beam and the normal line of the region to be machined of the hidden surface, so as to realize the laser shock strengthening treatment of the hidden surface. By using the movement and rotation of the total reflection mirror arranged in the workpiece, the method can realize the surface strengthening treatment of the hidden surface of the workpiece, significantly improve the mechanical performance of the workpiece and increase the fatigue life thereof, which is applicable to the surface strengthening of the workpiece with the hidden surface.
Provided are a high activity hydrogen desulfurization catalyst and preparation method thereof, the hydrogen desulfurization catalyst comprising a hydrogen desulfurization catalyst having CoMo, NiMo and NiW metal sulfide loaded on a porous zeolite, a hydrogen desulfurization catalyst having Co-Mo-Ni-W metal sulfide loaded on the porous zeolite, a hydrogen desulfurization catalyst containing F or B and having the CoMo, NiMo and NiW metal sulfide loaded on the porous zeolite, and a hydrogen desulfurization catalyst containing P and having the CoMo, NiMo and NiW metal sulfide loaded on the porous zeolite. The hydrogen desulfurization catalyst has better hydrogen desulfurization performance.
B01J 29/78 - Crystalline aluminosilicate zeolitesIsomorphous compounds thereof of types characterised by their specific structure not provided for in groups containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
C10G 45/08 - Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbonsHydrofinishing characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof in combination with chromium, molybdenum, or tungsten metals, or compounds thereof
96.
METHOD FOR PRODUCING 30-HALOGENATED BETULINIC ACID
A method for producing 30-halogenated betulinic acid. Betulin is used as a raw material, and is selectively oxidized and halogenated to generate 30-betulinic acid, and the selected oxidation and halogenation agent has high selectivity and has no influence on C-3 hydroxyl or carbon-carbon double bonds. In the present invention, oxidation and halogenation are completed in one step, so the process route is short, the treatment method is simple, and the product is purified easily.
patents
