The present disclosure relates to a primary frequency modulation method for a hydraulic full-period frequency modulation new energy generator set and a generator set therefor, belonging to the technical field of frequency modulation for hydraulic new energy generator sets. The method includes determining whether a grid frequency is within a rated frequency threshold. When the grid frequency deviates from the rated frequency threshold, the stability of the grid frequency is controlled by adjusting a rotor kinetic energy of a blade and an opening of the proportional throttle valve, energy storage and supply by using a bladder accumulator, and hydraulic energy storage and supply. The hydraulic energy storage and supply of the present disclosure can store more energy and provide a longer frequency modulation period. By employing a combined wind-storage approach for comprehensive frequency modulation control, and an anti-interference capability of the frequency of the entire hydraulic new energy generator set can be enhanced.
H02J 3/04 - Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
2.
Experimental platform for electro-hydraulic servo active suspensions and method for fault diagnosis
An experimental platform of the present disclosure is very close to an active suspension apparatus in a real vehicle. Fault feature data acquired on the basis of the experimental platform can well represent actual faults, so that a fault diagnosis model obtained on the basis of training of fault feature data sets has a relatively high practical value. According to the method of the present disclosure, noise reduction processing is performed on acquired vibration signals by combining with longitudinal displacement and lateral inclination angle data as well as positional relationships between vibration sensors of different hydraulic elements and an inertial sensor, and feature extraction is performed on vibration signals after noise reduction processing, so that constructed fault feature data sets are more accurate and more characteristic. The fault feature data sets are gradually expanded according to the actual faults, so that the fault diagnosis model has a certain self-learning capability.
B60G 17/0185 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method for failure detection
3.
Method and device for testing stress of high-temperature component of power plant boiler
The present invention belongs to the technical field of stress detection and provides a method and device for testing stress of a high-temperature component of a power plant boiler. The adjusting assembly includes a plurality of bearing blocks, each bearing block is provided with an accommodating groove vertically, limiting blocks are disposed at two ends of the accommodating groove symmetrically, an elastic member, a first connecting rod, and a second connecting rod are disposed in the accommodating groove, and a limiting plate is fixedly connected to one end of each of the first connecting rod and the second connecting rod. According to the present invention, lengths of the first connecting rod and the second connecting rod extending out of the accommodating groove are adjusted, so that the device can be adjusted according to a caliber of a pipeline of the power plant boiler.
G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
F22B 37/38 - Determining or indicating operating conditions in steam boilers, e.g. monitoring direction or rate of water flow through water tubes
G01N 1/18 - Devices for withdrawing samples in the liquid or fluent state with provision for splitting samples into portions
G01N 3/16 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces applied through gearing
G01N 3/18 - Performing tests at high or low temperatures
4.
Wheel action-based active suspension damping adjustment apparatus and method
A wheel action-based active suspension damping adjustment apparatus recognizes wheel actions through a steering apparatus, distance measuring apparatuses and force sensors and calculates an action damping magnitude according to damping parameters determined by different wheel actions, thereby achieving optimal adjustment under different actions. The changes in an inclination angle of a vehicle cabin floor and a vertical acceleration are monitored by using an inclination angle sensor and acceleration sensors, and meanwhile, an inclination angle damping and an acceleration damping are determined according to exceeding amplitudes, and a total damping of active suspensions is fed back and corrected, thereby further enhancing an adjustment and control effect of the active suspensions. According to the method, basic damping, action damping, inclination angle damping and acceleration damping data is output and recorded, and classified according to a vehicle state and the wheel actions, data changes under a same classification are compared.
B60G 17/0195 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the regulation being combined with other vehicle control systems
B60G 17/016 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
B60W 10/20 - Conjoint control of vehicle sub-units of different type or different function including control of steering systems
B60W 10/22 - Conjoint control of vehicle sub-units of different type or different function including control of suspension systems
B60W 50/00 - Details of control systems for road vehicle drive control not related to the control of a particular sub-unit
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
5.
PRESSURE AND FLOW MATCHING CONTROL METHOD OF HYDRAULIC POWER SOURCE FOR ROBOT
The present disclosure relates to a pressure and flow matching control method of a hydraulic power source for a robot, which includes S1: establishing a mathematical model of key components of the hydraulic power source; S2: constructing a trajectory planning model and kinematic model of the robot based on the mathematical model of the key components of the hydraulic power source; S3: improving a response speed by feedforward compensation and establishing a flow closed-loop control link of the hydraulic power source for the robot; S4: establishing a conversion relationship from the pressure to the flow and achieving the pressure and flow matching control of the hydraulic power source for the robot. The present disclosure completes the trajectory planning and kinematic analysis for the robot, establishes a conversion relationship between the pressure characteristics and the flow characteristics, and achieve the pressure and flow matching control of the hydraulic power source.
Beijing University of Chinese Medicine Dongfang Hospital Qinhuangdao Hospital (China)
Inventor
Cai, Wei
Zhang, Yunpeng
Liu, Mengtian
Zhao, Yuxi
Li, Zhuofang
Sun, Luxuan
Abstract
A pressure control valve includes a valve body with a hollow column structure, a valve cover, a valve core, a sealing device and a driving device. A side wall of the valve body is connected with a lower surface of the valve cover, and is provided with a through hole. The valve core, the sealing device and the driving device are arranged at a connection between the valve cover and the valve body. A threaded groove is provided at each end of the through hole on the side wall of the valve body. An upper surface of the valve cover is provided with a threaded hole for a bolt to pass through to be connected to the threaded groove, and a space for mounting the driving device. A cover plate is provided above the space with two sides respectively connected to the valve cover through a cylindrical pin.
A new linear machine learning method based on DNA hybridization reaction technology, includes a machine learning training part, an algorithm part, and a testing part. This machine learning method has the ability to learn linear functions. Unlike silicon circuits, the learning algorithm is implemented through the synchronization of DNA hybridization reactions. Therefore, the calculation mode of this machine learning method is a parallel computing model, and the weights of this machine learning are obtained through training without the involvement of electronic computers. Through the method, it is possible to learn multivariable linear functions without any limitation on the number of input terms. Due to the non-negative DNA concentration, the method used a dual track model for negative data processing operations.
The present invention belongs to the technical field of mechanical manufacturing and medical device surface processing, and specifically discloses a metal with a microporous surface structure, a preparation method therefor, and an application thereof. According to the present invention, a metal is sequentially sanded and polished, and then subjected to ultrasonic cavitation, wherein conditions for the ultrasonic cavitation are as follows: the ultrasonic cavitation is performed for 1-240 min, an amplitude of ultrasonic equipment is 1-100 μm, an output power of the ultrasonic equipment is 5-200 W, and an ultrasonic frequency is 15000-55000 Hz; and the metal with a microporous surface structure is obtained. The method disclosed by the present invention has the advantages of low cost, simple operation, and no pollution to the surface, can solve the preparation of micropores on small and micro surfaces, and has potential wide application prospects in medical biology and other related fields.
H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
10.
Apparatus and method for leaching toxic substances from inorganic binder-stabilized solid waste materials
The present application discloses an apparatus and method for leaching toxic substances from inorganic binder-stabilized solid waste materials. The apparatus includes a specimen placement box, a water supply and drainage system, and an angle adjustment apparatus, wherein a to-be-tested beam type specimen is provided in the specimen placement box; a water inlet joint and a drainage outlet are provided on the specimen placement box; an inlet of the water inlet joint is connected to an outlet of the water supply and drainage system; an outlet of the water inlet joint is positioned above the to-be-tested beam type specimen; the drainage outlet is connected to an inlet of the water supply and drainage system; the angle adjustment apparatus is capable of adjusting inclination of the specimen placement box. The present application further discloses a leaching method based on the apparatus.
A hydraulic system for a rapid mooring device of an offshore operation helicopter includes a fuel tank, a hydraulic pump, an electric motor, a check valve, a pressure sensor, a filter, an overflow valve, a two-position four-way electromagnetic reversing valve group, a three-position four-way Y type hydraulically operated reversing valve, an stacked double throttle check valve, an stacked internally controlled hydraulic lock, an externally controlled large flow hydraulic lock, a safety valve, a cartridge valve, an energy accumulator, a pneumatic hydraulic pump, a thick and thin parallel single rod hydraulic cylinder, a mechanical claw unlocking cylinder, a centering lock unlocking cylinder and an emergency lock unlocking cylinder. The control method includes routine action control methods such as rapid capture, straightening, rapid release, transverse mechanical locking, and transverse hydraulic locking in a traction process of the helicopter, a safety protection control method, and an emergency action control method.
A resin-based nano iron oxide reinforced microbial agent and a preparation method therefor and the use thereof. After resin-based nano iron oxide is mixed with a microbial agent and kitchen waste, the resin-based nano iron oxide at room temperature can enhance the degradation of the microbial agent to the kitchen waste by means of multiple functions of accelerating microbial proliferation, inducing high-activity expression of functional proteases, accelerating an electron transfer process, etc. The effect of the microbial agent can be fully exerted by means of alternating aerobic and anoxic environments, the biodegradability of metabolites is high, and the weight reduction rate of kitchen waste can reach 80%-99% by reacting under the room temperature condition for 3-5 hours. The energy consumption is low, secondary pollution is avoided, and the aims of reduction, recycling and harmlessness treatment of kitchen waste can be effectively achieved.
A method for in-situ etching diamond is provided, relating to the technical field of diamond etching. According to the application, the diamond is etched by using the convergent electron beam in an atmosphere of reaction gas.
A device and method for leaching toxic substances in an inorganic binder stabilized solid waste material. The device and method can leach toxic substances in inorganic binder stabilized solid waste materials under conditions close to actual working conditions, thereby providing more accurate data for harmless utilization of solid waste materials. The device comprises a test piece placing box (1), a water supply and drainage system (2) and an angle adjusting device, wherein a beam type test piece to be tested is arranged in the test piece placing box (1); the test piece placing box (1) is provided with a water inlet joint (11) and a water outlet (12); an inlet of the water inlet joint (11) is in communication with an outlet of the water supply and drainage system (2); an outlet of the water inlet joint (11) is positioned above the beam type test piece to be tested; the water outlet (12) is in communication with an inlet of the water supply and drainage system (2); and the angle adjusting device can adjust the inclination of the test piece placing box (1).
A method of rapid constructing human cerebral cortical organoids by 3D bioprinting and an application including preparing microfluidic chips, preparation of hydrogel of human cerebral cortical organoids, and printing of human cerebral cortical organoids. The microfluidic chip comprises a mixed-flow channel layer, liquid pool layer, microporous array layer, human cerebral cortical organoid culture layer, and culture medium recovery layer; the human cerebral cortical organoid hydrogel has gelatin, alginate, and hyaluronic acid; printing directly human cerebral cortical organoids in microfluidic chips by FRESH printing method, obtaining human cerebral cortical organoid chips after packaging. The application directly constructs large-scale human cerebral cortex-like with three layers of mutually connected structures in situ in organ chip through 3D bioprinting, simulates cerebrospinal fluid circulation through perfusion culture.
A method for preparing a shell-bionic ceramic tool and a shell-bionic ceramic tool, wherein the shell-bionic ceramic tool includes alternating stacks of ceramic powders with different components, pressing a ceramic green body using a cold briquetting method, carrying out pre-pressing once using a graphite indenter on a working surface thereof after each layer of the ceramic powder being loaded, and pressing a last layer using a graphite rod, and then pressing a whole ceramic green body with a certain pressure to promote a bonding of the layers of ceramic powder, which in turn gives a complex shape to an interface between the layers, increases a bonding area between the layers, and plays the role of hindering crack expansion, extending the crack expansion path, and improving the bonding strength of the interface; after then, hot-pressed sintering is used to densify the ceramic green body to obtain the shell-bionic ceramic tool.
B28B 3/02 - Producing shaped articles from the material by using pressesPresses specially adapted therefor wherein a ram exerts pressure on the material in a moulding spaceRam heads of special form
A gradient-structured ultra-fine bainitic low-alloy rail steel and a preparation method thereof are provided in the present application, belonging to the technical field of steel metallurgy. The rail steel to be treated is subjected to three thermal processing treatments so that the gradient-structured ultra-fine bainitic rail steel has a gradient structure consisting of a ferrite-pearlite dual phase microstructure and an ultra-fine bainite microstructure. The gradient structure of the present application enables the matrix of the rail to be a ferrite-pearlite composite phase structure, and only the surface layer of the service surface to be ultrafine bainite.
A photocurable composite hydrogel matrix precursor, a preparation method thereof and a scaffold with same. The photocurable composite hydrogel matrix precursor includes gelatin methacrylate, sodium alginate, sodium carboxymethyl cellulose and chondroitin sulfate, where the mass ratio of a photoinitiator to the gelatin methacrylate to the sodium alginate to the sodium carboxymethyl cellulose to the chondroitin sulfate is (0.2-0.3):(8-10):(1-3):(0.6-0.8):(0.05-0.07). By adoption of the precursor, a cell-loaded printing hydrogel scaffold can be obtained through an extrusion-based 3D bio-printing technology, and the scaffold is controllable in form, good in moldability, high in precision, and has good stability; the biocompatibility and bioactivity are high, so that a good growing environment can be provided for fibroblasts; and the preparation process is simple and can be completed within a short time, moreover, the porosity and mechanical performance of the 3D printing hydrogel scaffold can be adjusted by adjusting the raw material ratio.
A copper oxide with a hollow porous structure, a preparation method therefor, and a use thereof are provided. The copper oxide with a hollow porous structure is of a hollow octahedral structure, and has a size of 200-400 nm and a specific surface area of 23.5-79.6 m2/g, where the surface of the octahedron is composed of copper oxide nanoparticles having a size of 14-33 nm, and pore structures are formed among the copper oxide nanoparticles. The copper oxide with the hollow porous structure has good conductivity, high hydrophilicity and good catalytic performance, can substantially reduce the detection potential and greatly improve the detection sensitivity and the anti-interference performance when used for the electrochemical detection of pesticides.
A fully automated towing, alignment and hangar system suitable for an offshore operation helicopter includes a quick mooring device, a wide-angle camera installed on a rear wall of the quick mooring device, a longitudinal towing device, a DSP control unit, an MCU control unit, a helicopter and a mooring bar thereof. An alignment method based on above system includes following steps of acquiring an attitude image of a steering wheel, calculating a helicopter yaw angle and a steering wheel deflection angle, calculating position coordinates of the steering wheel, a first wheel and a second wheel in a deck coordinate system, judging boundaries relative to a towing indication line, extracting an optimal path suitable for the movement of the helicopter, calculating lateral and longitudinal movement position control commands, driving the movement of the helicopter, and repeating the above operations until the automated towing, alignment and hangar are completed. The method provided by the present disclosure does not need human intervention in the whole process, and thereby reducing operation difficulty, improving transshipment efficiency, and ensuring the safety of auxiliary personnel and equipment on the ship, and having an important practical value in the fields of ships, military industry and the like.
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY (China)
YANSHAN UNIVERSITY (China)
Inventor
Liu, Jimeng
Wang, Shuhuan
Zhao, Dingguo
Song, Qiong
Zhang, Fucheng
Abstract
A device for producing a carbon-nitrogen synergistic ultrahigh-nitrogen steel by means of multi-furnace pressure casting. The device comprises a pressurizable steel ladle (22), a pressurizable casting chamber (13) located at the bottom of the steel ladle, and a casting mold (14) provided inside the casting chamber. A tap hole at the bottom of the steel ladle is provided with a three-layer slide gate I (9), and a furnace lid II (18) at the top of the casting chamber is provided with a three-layer slide gate II (11); a high-pressure-resistant pipeline I (20) is connected to a lower sliding plate of the three-layer slide gate I, and a high-pressure-resistant pipeline II (19) is connected to an upper sliding plate of the three-layer slide gate II; and the high-pressure-resistant pipeline I and the high-pressure-resistant pipeline II are connected by means of a multi-furnace conversion joint (10). Further provided is a method for producing a carbon-nitrogen synergistic ultrahigh-nitrogen steel by means of multi-furnace pressure casting. By using the device, high-nitrogen alloy homogenization of molten steel is achieved in the pressurizable steel ladle by performing bottom-blowing nitrogen stirring and increasing the nitrogen pressure; and pressurizing solidification is performed in the casting chamber, and the escaping of nitrogen is inhibited. The pressurizable steel ladle and the pressurizable casting chamber are separately designed, and pressurizing casting of different casting materials in multiple furnaces can be achieved by means of multiple pressurizable casting chambers and multi-furnace conversion joints, thereby improving the production efficiency of a special steel type. The cast ultrahigh-nitrogen steel has a high nitrogen content and uniform components, and can satisfy the corrosion-resistant usage requirements in special environments such as train rails, railroad frogs and ocean engineering.
B22D 27/13 - Treating the metal in the mould while it is molten or ductile by using pressure making use of gas pressure
B22D 1/00 - Treatment of fused masses in the ladle or the supply runners before casting
B22D 41/22 - Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
A dispersion-compensation microstructure fiber uses pure silica glass as the background material. It includes the core, the first-type defects, the second-type defects and the cladding. The air holes in the fiber cross section are arranged in the equilateral triangle lattice with the same adjacent air-hole to air-hole spacing. The core is formed by omitting 1 air hole. The first-type defects are formed by the 6 air holes locating at the vertices of hexagonal third-layer porous structure surrounding the core and their surrounding background material. The second-type defects are formed by the air holes in the first air-hole layer surrounding each first-type defect and their surrounding background material. The second-type defects act as the porous structure to surround the first-type defects and the fundamental defect modes, and can also combine with the first-type defects to act as the core of the second-order defect modes.
A hydrogel for cell-laden bioprinting, bioink, and a preparation method and an application thereof, relates to the technical field of biomedical polymer hydrogels. The hydrogel for cell-laden bioprinting is polymer gel formed by adding a cell-specific material into a matrix of alginate and gelatin and crosslinking and curing, wherein the cell-specific material is polypeptide selected according to different laden cells. The structures printed using the hydrogel may have the advantages such as adjustable mechanical properties, adjustable porosity, high biocompatibility, high printing accuracy, and high customizability, which may widely support the printing of human tissues and organs such as spinal cord, cartilage, and heart, and has good prospects for applications in tissue repair, organ transplantation and so on.
A61L 26/00 - Chemical aspects of, or use of materials for, liquid bandages
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]
A high-entropy austenitic stainless steel and a preparation method thereof are provided. The elemental composition of the stainless steels developed by the invention is as follows: Cr: 5-30%; Ni: 5-50%; Ti: 1-15%; Al: 1-15%; the rest are Fe and inevitable impurities; preferably, the composition is Cr: 5-19%; Ni: 5-29%; Ti: 6-15%; Al: 5-15%; the rest element is Fe. By adjusting the atomic ratio of each element, the nano-sized precipitates are generated as much as possible, and the strength is maximized while maintaining a high plasticity. The stainless steels provided by this invention have only five alloying components, a low manufacturing cost, and high-strength and high-plasticity. They can be widely used in many industrial fields such as aviation, aerospace, marine, and nuclear power with broad market prospects.
C22F 1/16 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
An alumina-based ceramic tool material with low thermal expansion and a preparation process thereof, accordingly, the ceramic tool material may have both the high hardness of alumina ceramics after the hot pressing sintering, and reduces the thermal expansion coefficient of the overall ceramic material by adding the Sc2W3O12 as the negative thermal expansion phase, which improves the thermal shock resistance of ceramic tools in high-speed cutting engineering and meets the requirements of large temperature range during the machining of nickel-based superalloys. Moreover, the composite material does not use metal binder and has strong thermal stability even in the high-speed machining under extreme heat-force-chemistry coupling, so it has a high machining compatibility for nickel-based superalloys.
A fully automated towing, alignment and hangar system suitable for an offshore operation helicopter includes a quick mooring device, a wide-angle camera installed on a rear wall of the quick mooring device, a longitudinal towing device, a DSP control unit, an MCU control unit, a helicopter and a mooring bar thereof. An alignment method based on above system includes following steps of acquiring an attitude image of a steering wheel, calculating a helicopter yaw angle and a steering wheel deflection angle, calculating position coordinates of the steering wheel, a first wheel and a second wheel in a deck coordinate system, judging boundaries relative to a towing indication line, extracting an optimal path suitable for the movement of the helicopter, calculating lateral and longitudinal movement position control commands, driving the movement of the helicopter, and repeating the above operations until the automated towing, alignment and hangar are completed. The method provided by the present disclosure does not need human intervention in the whole process, and thereby reducing operation difficulty, improving transshipment efficiency, and ensuring the safety of auxiliary personnel and equipment on the ship, and having an important practical value in the fields of ships, military industry and the like.
A single-core polarization-maintaining dispersion compensation micro-structured optical fiber comprises a fiber core, a first layer of air holes surrounding the fiber core, the cladding defects on the x-axis, the cladding defects on the y-axis, and the cladding. The air holes in the fiber cross section are arranged in the equilateral triangle lattice. Three consecutive air holes are omitted to form a solid area. This solid area is the fiber core. There are two cladding defects along the x-axis. Their centers are respectively located at the two vertices of the hexagon on the x-axis, which is formed by the fourth air hole ring from the core exclusive the central air hole. Each cladding defect along the x-axis contains 7 air holes and goes through from the core by only 1 layer of air holes. There are also two cladding defects along the y-axis.
A composite hydrogel for light-cured 3D cell-laden printing and a preparation method and application thereof. The composite hydrogel of the present disclosure combines advantages of gelatin methacryloyl, sodium carboxymethylcellulose, hyaluronic acid-glutamic acid polymer, and the like. The provided composite hydrogel for 3D printing has the characteristics of low toxicity, good biocompatibility and adjustable mechanical properties, can provide cells with a three-dimensional living environment, promotes cell adhesion and migration on gradient scaffolds, and is suitable for tissue engineering scaffolds and cell-laden printing of tissues. The printing process of a scaffold is simple and can be completed within a short time, and the porosity and mechanical properties of the 3D printed hydrogel scaffold can be adjusted by adjusting the proportion of HA-Glu and Col in the hydrogel system.
A monocrystalline silicon micro-nano dual-scale anti-reflection texture and a preparation method therefor. The preparation method combines nanosecond-laser-assisted waterjet near-damage-free processing and femtosecond laser scanning, and subsurface damage caused by a re-cast layer phenomenon and a hot crack in a monocrystalline silicon laser texturing process can be effectively reduced by combining a nanosecond-laser-assisted waterjet near-damage-free processing technology and an ultra-short pulse femtosecond laser cold processing technology; and meanwhile, a micro-scale frame structure and a nano-scale structure can be flexibly modified respectively by adjusting nanosecond-laser-assisted waterjet technological parameters and femtosecond laser technological parameters, a geometry light trapping effect and an effective dielectric effect can be achieved in a micro-nano dual-scale hybrid structure at the same time, and surface reflection is reduced.
B28D 5/04 - Fine working of gems, jewels, crystals, e.g. of semiconductor materialApparatus therefor by tools other than of rotary type, e.g. reciprocating tools
G02B 1/118 - Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
G02B 1/113 - Anti-reflection coatings using inorganic layer materials only
B23K 26/0622 - Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
Disclosed in the present invention is a method for in-situ etching of diamond, which relates to the technical field of diamond etching. According to the present invention, a diamond is etched by utilizing converged electron beams in a reaction gas atmosphere. The method has the characteristics of high processing precision, a simple process, low cost and high efficiency, and can achieve directional etching of diamond. Furthermore, the processed diamond sample is clean and pollution-free and does not need to be re-processed, such that a large amount of time and resources can be saved on.
The present invention relates to a bionic flow channel design method for additive manufacturing cylinder block and its hydraulic drive device , which includes the following steps: Step 1: determine the energy required to transfer liquid through bionic flow channels; Step 2: determine the radius of the bionic flow channel; Step 3: determine the branch angle of the bionic flow channel; Step 4: determine the structure of the bionic flow channel and complete the manufacture of the hydraulic drive device.
G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]
33.
TONGUE-SHAPED OPTICAL FIBER PROBE BASED ON SURFACE ENHANCED RAMAN SCATTERING, AND PREPARATION METHOD THEREFOR
22 laser tapering method or a fusion tapering method; the spherical structure (3) is prepared by a discharge method, and optical fiber spherical structures (3) with different sizes are obtained by controlling discharge currents, optical fiber feeding, discharge time, etc., of a fusion splicer; and the micro-cavity recess structure (4) is etched by a femtosecond laser and is prepared in the optical fiber spherical structures (3) by a point-by-point writing method. The probe can be used for both activating light transmission and receiving Raman scattering spectrum, can be combined with a Raman spectrometer to form an optical fiber Raman sensing detection device, and is conducive to improving the practicability of an optical fiber SERS probe; the preparation method for an optical fiber probe with better sensitivity and repeatability is provided, so as to promote the applications of the Raman spectroscopy in on-line analysis, real-time detection, and trace and in-situ detection.
A ceramic tool with integrated temperature sensing and cutting functions and preparation method and application thereof. The ceramic tool comprises a ceramic matrix, a positive thermoelectric layer and a negative thermoelectric layer being provided on two surfaces of the ceramic matrix; the ceramic matrix being formed by sintering a first matrix material, a first binding agent and a first reinforcing phase, and the thermoelectric layer being formed by sintering of a thermoelectric material; the first matrix material comprises one or more of Al2O3, Si3N4 and CBN; the first binding agent comprises one or more of Mo, Ni, Co, W and Cr; the first reinforcing phase comprises one or more of TiC, WC, SiC, MgO, Cr2O3, TiO2 and ZrO2; the thermoelectric material for the positive thermoelectric layer comprises ZrB2 and SiC; the thermoelectric material for the negative thermoelectric layer comprises ZrB2, SiC, and graphite.
2+3N+1 hexagonal frustum deployable units are combined into a closely connected deployable mechanism through unit connecting rods and support frames; the present invention combines hexagonal frustum deployable units array into deployable mechanisms of any aperture size, which has advantages such as high rigidity, high retraction rate, high support performance and adjustable aperture size, which makes space deployable antenna mechanism safer, more efficient and convenient during operation process and solves problems of weak signal transmission or reception, small data capacity and low communication rate of traditional antennas.
The present invention relates to the technical field of mechanical manufacturing and medical device surface processing, and particularly discloses a metal having a microporous structure on the surface, and a preparation method therefor and an application thereof. The present invention comprises: first sequentially grinding and polishing metal, and then carrying out ultrasonic cavitation with the conditions for ultrasonic cavitation being as follows: the ultrasonic cavitation treatment time is 1-240 min, the amplitude of ultrasonic equipment is 1-100 μm, the output power of the ultrasonic equipment is 5-200 W, and the ultrasonic frequency is 15000-55000 Hz, to obtain metal having a microporous structure on the surface. The method disclosed in the present invention is low in cost, simple to operate, and free of pollution to the surface, and can implement preparation of micro-pores on small and micro surfaces, and the present invention has potential broad application prospects in medical biology and other related fields.
2 gradually decrease by 5% from the surface layer to the central layer, and the contents of Ni and Mo gradually increase from the surface layer to the central layer.
C04B 35/58 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on borides, nitrides or silicides
B26D 1/00 - Cutting through work characterised by the nature or movement of the cutting memberApparatus or machines thereforCutting members therefor
C04B 35/626 - Preparing or treating the powders individually or as batches
Disclosed in the present invention are an inertial regulation method of active suspensions based on terrain ahead of a vehicle and a control system thereof. According to the scanned terrain ahead of the vehicle, a center of mass trajectory and attitude history are calculated when the vehicle passes through the terrain ahead of the vehicle with passive suspensions. After smoothing the trajectory, the active suspension is controlled to make the vehicle drives according to the smoothed trajectory. During this period, a smoothness coefficient is adjusted to make each suspension stroke be limited within a limit stroke, and according to the supporting force and stroke of each active suspension calculated from a dynamics model, the impedance control based on force-displacement is carried out on an actuator of the suspension. The present invention can significantly improve the driving comfort and handling stability of the vehicle driving on an uneven road surface.
B60G 17/0165 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
39.
Vehicle active suspension inertia regulation method based on wheel supporting force, and control system
An inertial regulation method and control system of vehicle active suspension based on a supporting force of each wheel comprises an inner loop control and an outer loop control. The inner loop control is to calculate, according to the dynamics, a theoretical supporting force of each wheel when the vehicle is driving on a virtual slope plane with a 6-dimensional acceleration and a pitch angle measured by an inertial measurement unit; compare the theoretical supporting force with the measured supporting force of each wheel; and control the expansion of each suspension cylinder according to the difference value, so that the supporting force of each wheel changes according to the theoretical supporting force. The outer loop control is to control each suspension cylinder for the same expansion of displacement, so that the average value of all the suspension cylinder strokes tends to a median value.
B60G 17/016 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
B60G 17/015 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
B60G 17/0165 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
B60G 17/019 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
40.
VASCULAR STRUCTURE-CONTAINING LARGE-SCALE BIOLOGICAL TISSUE AND CONSTRUCTION METHOD THEREOF
A vascular structure-containing large-scale biological tissue and a construction method thereof. In the existing three-dimensional cell culture, it is contradictory for the elastic modulus of the scaffold material in ensuring structural stability and biocompatibility, and the vascular structure is required to provide channels for nutrient exchange when a large-scale structure is prepared. A cell-laden matrix material is poured into a hollow scaffold serving as a supporting scaffold. The overall stability of the scaffold structure can be ensured by regulating the mechanical properties of the supporting scaffold, thereby resolving the contradiction in ensuring structural stability and biocompatibility for the mechanical properties of the scaffold material in the conventional three-dimensional cell culture. A coaxially printing outer material contains a thermosensitive material. The removal of the outer thermosensitive material can increase the porosity of the vascular walls, and further increase the diffusion in the hollow vascular ducts.
A hydraulic active suspension flow control system includes a hydraulic oil tank, a variable displacement pump with an oil suction port communicating with the hydraulic oil tank, a check valve, a servo valve, a suspension cylinder controlled by the servo valve, an engine revolution speed sensor configured to detect an engine revolution speed, a vehicle speed sensor configured to detect a vehicle speed, an oil pressure sensor configured to detect an accumulator outlet pressure, a flow controller configured to control displacement of the variable displacement pump by receiving data from the engine revolution speed sensor, the vehicle speed sensor and the oil pressure sensor, and a relief valve connected to the check valve in parallel and provided at an oil outlet of the variable displacement pump. The variable displacement pump is connected to an engine through a clutch; and an accumulator is connected between the servo valve and the check valve.
B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
H01L 31/18 - Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
C01G 15/00 - Compounds of gallium, indium, or thallium
H01L 31/108 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier being of the Schottky type
C30B 33/04 - After-treatment of single crystals or homogeneous polycrystalline material with defined structure using electric or magnetic fields or particle radiation
C23C 14/02 - Pretreatment of the material to be coated
C23C 14/18 - Metallic material, boron or silicon on other inorganic substrates
The present disclosure belongs to the technical field of rehabilitation medical devices, and in particular relates to a pose-adjustable rigid-flexible coupled waist rehabilitation robot. The robot comprises a fixed platform, a movable platform connected to the fixed platform, a lumbar vertebra support assembly mounted on the movable platform, and two support airbags symmetrically arranged at both sides of the lumbar vertebra support assembly. The lumbar vertebra support assembly comprises a plurality of bellow air bags arranged in parallel. By controlling the pressure in a plurality of bellow air bags arranged in parallel, the lumbar vertebra support assembly at the lumbar vertebra position can be adjusted to different curvatures to adapt to different patients, such that the lumbar vertebra support assembly can support the lumbar vertebra part of the patient in a perfectly fitting manner to guarantee the comfort in the rehabilitation training process.
A ceramic tool material, in particular with piezoelectric effect and a preparation method thereof, and a cutting tool. The ceramic tool material includes the following raw materials by weight: 30-70 parts of matrix material, 30-70 parts of piezoelectric material, 5-10 parts of binder, and 10-20 parts of reinforcing phase and can be made into cutting tools. The cutting tool has a piezoelectric effect and excellent mechanical properties and can convert the cutting force signal into the charge signal during machining. By collecting charge signals, a cutting force can be measured and ceramic cutting tool condition can be monitored. Cutting force measurement function and high mechanical properties are integrated. A ceramic tool material with piezoelectric effect can measure the cutting force on the premise by meeting the cutting performance requirements.
H01L 41/18 - Selection of materials for piezo-electric or electrostrictive elements
H01L 41/083 - Piezo-electric or electrostrictive elements having a stacked or multilayer structure
H01L 41/273 - Manufacturing multilayered piezo-electric or electrostrictive devices or parts thereof, e.g. by stacking piezo-electric bodies and electrodes by integrally sintering piezo-electric or electrostrictive bodies and electrodes
B23B 27/14 - Cutting tools of which the bits or tips are of special material
C04B 35/10 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on aluminium oxide
C04B 35/468 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
C04B 35/491 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxides based on zirconium or hafnium oxides or zirconates or hafnates containing also titanium oxide or titanates based on lead zirconates and lead titanates
C04B 35/626 - Preparing or treating the powders individually or as batches
C22C 32/00 - Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
C22C 30/00 - Alloys containing less than 50% by weight of each constituent
C22C 29/12 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on oxides
45.
Carbon nitride based composite ceramic tool materials, preparation method and cutting tool thereof
The present invention relates to the field of new materials technology, in particular to carbon nitride composite ceramic tool materials, preparation method and cutting tools thereof. The raw materials comprise carbon nitride, titanium carbonitride, molybdenum, nickel and cobalt, carbon nitride as the matrix phase, titanium carbonitride as the reinforcing phase are added to the carbon nitride based composite ceramic materials, with molybdenum, nickel and cobalt as a suitable sintering aid, dense composite tool material is obtained with vacuum hot press sintering method. The prepared carbon nitride based composite ceramic tool materials boast the advantages of low cost, high hardness, high bending strength and high fracture toughness, which is an important way to promote the innovation, development and popularization of carbon nitride materials.
C04B 35/58 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on borides, nitrides or silicides
B23B 27/14 - Cutting tools of which the bits or tips are of special material
C04B 35/626 - Preparing or treating the powders individually or as batches
A polarization-maintaining dispersion-compensation microstructure fiber includes an inner core, an air-hole array in area 1 and an air-hole array in area 2. The air holes in the area 1 and 2 air-hole arrays are arranged in square lattice. The air-hole arrays in areas 1 and 2 are dislocated by half-layer along y-direction. In area 1, 2 air holes in the middle row are omitted to form a solid area as the inner core. 2 outer cores are located in 2 sub-areas of area 2, and each outer core contains 2 air holes. The long (or short) axes of the inner and outer cores are perpendicular, and the center points of the inner core and the two outer cores are located on the x-axis. The optical mode has a large negative dispersion in a certain polarized direction of the inner core, and the microstructure fiber can maintain the polarized direction of this mode during transmission.
Disclosed in the present invention are a high-entropy austenitic stainless steel, and a preparation method therefor, which belong to the technical field of stainless steel materials in the material field. The stainless steel developed in the present invention comprises the following elementary components in atomic percentages: 5-30% of Cr, 5-50% of Ni, 1-15% of Ti, 1-15% of Al, and the balance of Fe and inevitable impurities, preferably, 5-19% of Cr, 5-29% of Ni, 6-15% of Ti, 5-15% of Al, and the balance of Fe. By means of regulating and controlling the atomic ratio of each element, the precipitation of a nanometer precipitated phase is maximized to the greatest possible extent, and the strength is also improved to the maximum extent while a high plasticity is maintained. The stainless steel provided in the present invention has a simple component system, a low manufacturing cost, high strength and high plasticity, can be widely applied to various industrial fields such as aviation, spaceflight, oceanography and nuclear power, and has wide market prospects.
The present application discloses a conductive high-strength diamond/amorphous carbon composite material and a preparation process thereof. The diamond/amorphous carbon composite material is composed of an amorphous carbon continuous phase and multiple separate diamond phases embedded in the amorphous carbon continuous phase, wherein the diamond phases exhibit an ordered sp3 hybrid state, and the amorphous carbon continuous phase exhibits a disordered sp2 hybrid state. The present application further discloses a process for preparing the above diamond/amorphous carbon composite material. The process comprises using sp3 carbon powder or glassy carbon as a raw material to obtain the above-mentioned material by sintering. The diamond/amorphous carbon composite material shows good electrical conductivity, good electrical discharge machining ability, good chemical stability and light weight, and has broad application prospects in aerospace, automobile industry and biomedical equipment.
A dispersion compensation microstructured optical fiber, using pure silica glass as a substrate and comprising a fiber core, a first type of defect, a second type of defect and cladding. Air holes in an end face of the optical fiber are arranged in regular triangles having the same adjacent air hole spacing; one air hole is omitted to form a fiber core; six vertex angle air holes surrounding a third layer of a hexagonal porous structure of the fiber core and surrounding substrate materials thereof form a first type of defect, and a first layer of air holes surrounding each first type of defect and surrounding substrate materials thereof form a second type of defect. The second type of defect can both serve as a porous structure surrounding the first type of defect and a defect fundamental mode, together with the cladding, and also serve as a core of a defect second-order mode together with the first type of defect, so that two different defect waveguide structures are formed using the same defect structure, and two types of defect modes are supported. The numerical values and slopes of the refractive indexes of the two defect modes and a wavelength red shift curve are regulated and controlled, so that they can be matched with a core mode numerical value and mismatched with the slope, and cause the core mode to generate negative dispersion with large absolute values at two resonance wavelengths.
Disclosed in the present invention are a porous aerogel scaffold, and a preparation method therefor and an application thereof. The preparation method comprises: adding a photoinitiator and polyethylene glycol diacrylate into a buffer solution, heating for dissolution, uniformly mixing, then adding Pluronic F127 into the mixture, and letting same stand at a low temperature to obtain an aerogel scaffold material; and printing a hydrogel scaffold by means of 3D printing technology, carrying out ultraviolet irradiation for cross-linking to form a three-dimensional scaffold having a stable structure, carrying out low-temperature soaking to remove the Pluronic F127, and freeze drying to obtain a porous aerogel scaffold. The Pluronic F127 is used as a sacrificial material, and after 3D printing of the hydrogel scaffold is completed, the Pluronic F127 is removed; a porous structure can be formed in the scaffold by means of freeze drying technology; it is beneficial to the survival, growth and proliferation of cells during three-dimensional culture.
C08J 9/26 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out
C08J 9/28 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
C08J 3/28 - Treatment by wave energy or particle radiation
The present invention belongs to the technical field of the preparation of nanomaterials, and specifically relates to a copper oxide with a hollow porous structure, and a preparation method therefor and the use thereof. The present invention provides a copper oxide with a hollow porous structure, which copper oxide is of a hollow octahedral structure, and has a size of 200-400 nm and a specific surface area of 23.5-79.6 m2/g, wherein the surface of the octahedron is composed of copper oxide nanoparticles having a size of 14-33 nm, and pore structures are formed among the copper oxide nanoparticles. The copper oxide with the hollow porous structure has good conductivity, high hydrophilicity and good catalytic performance, can substantially reduce the detection potential and greatly improve the detection sensitivity and the anti-interference performance when used for the electrochemical detection of a pesticide. In the present invention, a copper oxide with an octahedral hollow porous structure is obtained by means of chemically etching a Cu-MOF precursor using a strong reducing agent, centrifugally drying same and then further subjecting same to high-temperature calcination. The preparation method is simple and easy to control, has high repeatability, and can easily achieve large-scale production.
G01N 27/26 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variablesInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by using electrolysis or electrophoresis
52.
Method for generating novel impedance configuration for three-degree-of-freedom (3DOF) robotic leg
The present disclosure relates to a method for generating a novel impedance configuration for a three-degree-of-freedom (3DOF) leg of a hydraulically-driven legged robot. The method includes: separately determining variations of input signals of an inner position-based control loop and an inner force-based control loop of a hydraulic drive unit of each joint based on an obtained mathematical model; generating a novel impedance configuration in which position-based control is performed on a hydraulic drive unit of a hip joint, and force-based control is performed on hydraulic drive units of a knee joint and an ankle joint in a hydraulic drive system of the leg of a to-be-controlled robot; and performing forward calculation by using the leg mathematical model, to obtain an actual position and a force variation of the foot of the leg of the to-be-controlled robot to control motion of the foot of the to-be-controlled robot within motion space.
The application provides a porous carbon block material having high elasticity and high sealing, and provides a method for preparing the same. Particularly, the present application provides a porous carbon block material, wherein the porous carbon block material has a pore size in the range of from 3 nm to 100 nm, a porosity of from 50% to 87%, and the pores in the material are closed pores. In addition, the application provides a method for preparing the porous carbon block material according to the present application. The porous carbon block material according to the present application has small pore size, high porosity, and closed pores, and thus has high strength combined with high elasticity, high sealing property, and low density. Hence, the porous carbon block material according to the present application may be used as a sealing material.
A low-crosstalk large-capacity few-mode optical fiber includes an optical fiber cladding. Few-mode units are arranged in the optical fiber cladding, each few-mode unit sequentially includes a few-mode fiber core, an inner cladding and a trench from inside to outside, and a high-refractive-index ring is arranged in the few-mode fiber core. The few-mode units include first few-mode subunits, second few-mode subunits and third few-mode subunits, where the first few-mode subunits, the second few-mode subunits and the third few-mode subunits are arranged at intervals. The first few-mode subunit includes a first few-mode fiber core, the second few-mode subunit includes a second few-mode fiber core, and the third few-mode subunit includes a third few-mode fiber core, the radii and refractive indexes of the first few-mode fiber cores, the second few-mode fiber cores and the third few-mode fiber cores being different, respectively.
A photo-cured forming composite hydrogel matrix precursor and a preparation method therefor and a stent having the precursor. The photo-cured forming composite hydrogel matrix precursor comprises methacrylated gelatin, sodium alginate, sodium carboxymethyl cellulose, and chondroitin sulfate, wherein the mass ratio of a photoinitiator to methacrylated gelatin to sodium alginate to sodium carboxymethyl cellulose to chondroitin sulfate is 0.2-0.3:8-10:1-3:0.6-0.8:0.05-0.07. A cell-loaded printing hydrogel stent can be formed of the photo-cured forming composite hydrogel matrix precursor by using an extrusion 3D bio-printing technology. The stent is controllable in form, good in formability, high in precision, and relatively good in stability, has relatively good biocompatibility and biological activity, and can provide a good growth environment for fibroblasts. The preparation process is simple and can be completed within a short period of time. The porosity and the mechanical property of the 3D printing hydrogel stent are adjusted by adjusting the proportion of the raw materials.
A single-core polarization-maintaining dispersion compensation micro-structured optical fiber, which uses pure quartz glass as a base material, and comprises a fiber core, a first layer of air holes encapsulating the fiber core, X-axis upper cladding defects, Y-axis upper cladding defects, and cladding. Air holes on end surfaces of the optical fiber are arranged in an equilateral triangle arrangement; a solid region formed by omitting three consecutive air holes is the fiber core; the centers of two X-axis upper cladding defects are located at hexagonal vertex angles on an X-axis, each X-axis upper cladding defect comprises seven air holes and is separated from the fiber core by only one layer of air holes; the centers of two Y-axis upper cladding defects are located on a hexagonal perpendicular bisector on a Y-axis and are separated from the fiber core by three layers of air holes, and each Y-axis upper cladding defect comprises one air hole. Optical modes of the fiber core in X and Y polarization directions have negative dispersions of large absolute values at the same wavelength, and can maintain linear polarization states of long-axis and short-axis polarized light during transmission, so that the technical effect of balancing and compensating positive dispersions of the two polarized light accumulation of a front-end optical fiber can be achieved.
The present invention discloses a bi-directional flat plate foldable unit, including a first row of antenna plates and a second row of antenna plates distributed along a first direction; the first row of antenna plates and the second row of antenna plates both include three antenna plates distributed in a second direction perpendicular to the first direction, three antenna plates in the first row of antenna plates and three antenna plates in the second row of antenna plates are set opposite to each other and hinged to form a first rotating pair; any two antenna plates adjacent to each other in the same row of antenna plates are hinged to form a second rotating pair; three antenna plates in the first row of antenna plates and three antenna plates in the second row of antenna plates are connected by a vertical support mechanism, and the first row of antenna plates are connected to the second row of antenna plates by a lateral support mechanism. The bi-directional flat plate foldable antenna mechanism includes at least two bi-directional flat plate foldable units mentioned above. The present invention facilitates the folding and unfolding of planar antennas with larger physical diameter and high rigidity.
H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q 3/01 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the shape of the antenna or antenna system
The invention provides an endless rolling method based on temperature uniformity control, and belongs to the field of iron and steel metallurgy. By optimizing the process path, a new layout mode is adopted, a double heat storage soaking furnace and a descaling box are additionally arranged, transverse and longitudinal bonding magnetic induction heating device is adopted, transverse and longitudinal temperature uniform of the slab in the rolling process is realized, the cross section temperature difference is reduced, and the product quality is improved. On the basis of five-stand arrangement of a traditional finish rolling mill, a rolling mill is additionally arranged to serve as a standby rolling mill, such that on-line non-shutdown change roller of the finish rolling mill is realized. The method of the invention realizes a full-continuous production of production and meets the high-quality development requirements of iron and steel metallurgy, such that traditional cool rolling can be replaced with hot rolling, traditional thick-specification strip can be replaced with high-added-value thin specification strip. There is important significance in the aspects of productivity optimization layout, green manufacturing, intelligent manufacturing and the like.
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
B21B 45/04 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling
A polarization-maintaining dispersion compensation microstructured optical fiber, using pure quartz glass as a base material. The optical fiber comprises: an inner core, a region 1 air hole array, and a region 2 air hole array. Air holes in the region 1 air hole array and in the region 2 air hole array are all arranged in a square lattice; the region 2 air hole array and the region 1 air hole array are arranged in a manner of staggering by a half layer in a y direction; in the region 1, two consecutive air holes in a middle column are omitted, forming a solid region as the inner core; two outer cores are located in two subregions of region 2, respectively, and each outer core comprises two air holes; and long and short axis directions of the inner and outer cores are perpendicular to each other, and center points of the inner core and the two outer cores are all located on an x axis. In the present invention, the optical mode has a large negative dispersion in a specific polarization direction of the inner core, and a microstructured optical fiber can maintain the polarization direction of this mode during transmission, so as to achieve the technical effects of performing polarization maintenance and cumulative dispersion compensation on light inputted from a front-end polarization-maintaining optical fiber.
Disclosed are a vehicle active suspension inertia regulation method based on wheel supporting force, and a control system, comprising inner loop control and outer loop control: for inner loop control, according to the six-dimensional acceleration and attitude angle of a vehicle as measured by an inertial measurement unit, using dynamics to solve for a theoretical value of the supporting force of each wheel when the vehicle is running on a corresponding virtual slope plane, comparing the theoretical values with the actual values of the supporting forces of the wheels, and, according to the difference values therebetween, controlling each suspension cylinder to extend and retract, so that the supporting forces of the wheels change according to the theoretical values; for outer loop control, controlling the suspension cylinders to extend or retract by the same amount of displacement, so that the average stroke value of all of the suspension cylinders approaches the median value. The present invention can significantly improve the smoothness and operating stability of a vehicle running on an uneven road surface.
B60G 17/015 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
An active suspension inertia regulation method based on a vehicle-front terrain (1), and a control system thereof. The method comprises: calculating, according to a scanned vehicle-front terrain (1), a trajectory of a center of mass and an attitude history of a vehicle traveling through the vehicle-front terrain (1) in a passive suspension; after smoothing the trajectory of the center of mass and the attitude history, controlling an active suspension so that the vehicle travels according to the smoothed trajectory; and during the period, adjusting a smoothing coefficient to limit each suspension stroke within a limit stroke, and performing force-displacement-based impedance control on an actuator of the suspension according to the support force and stroke of each active suspension calculated by a dynamic model. The ride comfort and handling stability of the vehicle traveling on an uneven road can be significantly improved.
B60G 17/0165 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
62.
INERTIAL REGULATION METHOD AND CONTROL SYSTEM OF VEHICLE ACTIVE SUSPENSION BASED ON SUPPORTING FORCE OF EACH WHEEL
Disclosed are a vehicle active suspension inertia regulation method based on wheel supporting force, and a control system, comprising inner loop control and outer loop control: for inner loop control, according to the six-dimensional acceleration and attitude angle of a vehicle as measured by an inertial measurement unit, using dynamics to solve for a theoretical value of the supporting force of each wheel when the vehicle is running on a corresponding virtual slope plane, comparing the theoretical values with the actual values of the supporting forces of the wheels, and, according to the difference values therebetween, controlling each suspension cylinder to extend and retract, so that the supporting forces of the wheels change according to the theoretical values; for outer loop control, controlling the suspension cylinders to extend or retract by the same amount of displacement, so that the average stroke value of all of the suspension cylinders approaches the median value. The present invention can significantly improve the smoothness and operating stability of a vehicle running on an uneven road surface.
B60G 17/015 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
An active suspension inertia regulation method based on a vehicle-front terrain (1), and a control system thereof. The method comprises: calculating, according to a scanned vehicle-front terrain (1), a trajectory of a center of mass and an attitude history of a vehicle traveling through the vehicle-front terrain (1) in a passive suspension; after smoothing the trajectory of the center of mass and the attitude history, controlling an active suspension so that the vehicle travels according to the smoothed trajectory; and during the period, adjusting a smoothing coefficient to limit each suspension stroke within a limit stroke, and performing force-displacement-based impedance control on an actuator of the suspension according to the support force and stroke of each active suspension calculated by a dynamic model. The ride comfort and handling stability of the vehicle traveling on an uneven road can be significantly improved.
B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
B60G 17/015 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
B60G 17/0165 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input to an external condition, e.g. rough road surface, side wind
64.
Method for predicting yield of calcium in a calcium treatment process based on deep neural network
UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING (China)
Inventor
Zhang, Lifeng
Wang, Weijian
Ren, Qiang
Ren, Ying
Luo, Yan
Abstract
A method for predicting a yield of calcium in a calcium treatment process based on deep neural network as provided relates to a calcium treatment process of molten steel refining in the field of iron and steel metallurgy, and includes steps of: obtaining production and operation data information of each of charges and thereby constructing a dataset; training and testing a deep neural network based on constructed dataset to establish a prediction model; and based on the prediction model, predicting and calculating current yield of calcium by taking actual production and operation data information of each charge as input. The method can predict the yield of calcium in the calcium treatment process, is favorable for accurately controlling a calcium content of steel, can stably control the calcium treatment process, improve the calcium treatment effect, improve the product quality, and ensure the production stability.
An electrically assisted forming process and device for a high-strength metal alloy thin-walled pipe includes a die sleeve, wiring terminals, a pulse power supply, a die seat, sealing baffle plates, a drawing die, and a cooling water circulation chamber. A process for forming a high-strength metal alloy thin-walled pipe includes first, graphite or fusible metal, i.e., an aluminum rod, is introduced into a high-strength metal alloy pipe to be drawn to fill the whole pipe; and then, pulse current is introduced into a plastic deformation area of the thin-walled pipe. A cooling device can be provided to achieve a good cooling effect. The thin-walled pipe with corresponding length is cut according to a production requirement after processing is completed, and annealing treatment is performed in a vacuum heat treatment furnace.
A hydraulic active suspension flow control system, comprising a hydraulic oil tank (1), a variable displacement pump (2) having an oil suction port communicated with the hydraulic oil tank (1), and a one-way valve (4), a servo valve (8) and a suspension cylinder (7) controlled by the servo valve (8) which are sequentially connected to an oil discharge port of the variable displacement pump (2). The variable displacement pump (2) is connected to an engine (9) by means of a clutch (12). An energy accumulator (6) is communicated between the servo valve (8) and the one-way valve (4). The hydraulic active suspension flow control system further comprises an oil pressure sensor (5) mounted at an outlet of the energy accumulator (6), an engine rotational speed sensor (10), a vehicle speed sensor (11), and a flow controller (13) for controlling the displacement of the variable displacement pump (2). An overflow valve (3) communicated in parallel with the one-way valve (4) is further provided at the oil discharge port of the variable displacement pump (2).
B60G 17/019 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
F15B 1/02 - Installations or systems with accumulators
F15B 11/17 - Servomotor systems without provision for follow-up action with two or more servomotors using two or more pumps
A hydraulic active suspension flow control system, comprising a hydraulic oil tank (1), a variable displacement pump (2) having an oil suction port communicated with the hydraulic oil tank (1), and a one-way valve (4), a servo valve (8) and a suspension cylinder (7) controlled by the servo valve (8) which are sequentially connected to an oil discharge port of the variable displacement pump (2). The variable displacement pump (2) is connected to an engine (9) by means of a clutch (12). An energy accumulator (6) is communicated between the servo valve (8) and the one-way valve (4). The hydraulic active suspension flow control system further comprises an oil pressure sensor (5) mounted at an outlet of the energy accumulator (6), an engine rotational speed sensor (10), a vehicle speed sensor (11), and a flow controller (13) for controlling the displacement of the variable displacement pump (2). An overflow valve (3) communicated in parallel with the one-way valve (4) is further provided at the oil discharge port of the variable displacement pump (2).
F15B 11/17 - Servomotor systems without provision for follow-up action with two or more servomotors using two or more pumps
F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
F15B 1/02 - Installations or systems with accumulators
B60G 17/019 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
B60G 17/015 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
B60W 10/22 - Conjoint control of vehicle sub-units of different type or different function including control of suspension systems
68.
Soft joint gripper based on 4D printing and consistency control method thereof
A soft joint gripper based on 4D printing comprises a palm body and five soft finger units connected with the palm body; each soft finger unit is provided with two soft finger joints and two finger bones; the finger bones are made of 3D printing resin; the soft finger joints are two symmetrical double-layer thin-film soft finger joint actuators; the double-layer thin-film soft finger joint actuator is made of a 4D printing liquid crystal elastomer and a polyimide electrothermal film, and the bending angle of each double-layer thin-film soft finger joint actuator is changed by energization or heating stimulation; and the double-layer film soft finger joint actuator is used to control the soft finger unit to perform reversible bending motion. Accurate control of the soft joint gripper can be realized.
A redundant parallel mechanism with less actuation and multi-degree-of-freedom outputs and a control method thereof are provided, which relate to the field of robot mechanisms. The redundant parallel mechanism includes: a fixed platform, a moving platform, multiple moving branch chains, and one or more redundant branch chains. Two ends of each moving branch chain are respectively connected to the fixed platform and the moving platform, and a brake is arranged on each moving branch chain. Two ends of each redundant branch chain are respectively connected to the fixed platform and the moving platform, and an actuating part is arranged on each redundant branch chain. There are n redundant branch chains arranged. During control, the number of follow-up moving branch chains is set to n, and the n moving branch chains move to expected positions and postures under the control of the n redundant branch chains.
A low-complexity control method for an asymmetric servo hydraulic position tracking system. The method comprises the following steps: establishing a servo hydraulic system model of a single-outlet rod (step 1); according to the servo hydraulic system model of the single-output rod, designing a controller of a servo hydraulic system of the single-output rod by using a low-complexity control strategy (step 2); and proving the stability of the servo hydraulic system of the single-output rod according to the controller of the servo hydraulic system of the single-output rod and the servo hydraulic system model of the single-output rod (step 3). The method can solve various uncertainty problems and unknown nonlinear problems in the hydraulic system, and the design of the controller does not depend on an accurate mathematical model, and only needs a state signal that can be measured.
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
71.
4D printed gripper with flexible finger joints and trajectory tracking control method thereof
The present disclosure relates to a 4D printed gripper with flexible finger joints and a trajectory tracking control method thereof. The 4D printed gripper with flexible finger joints includes: a palm unit and five finger units connected to the palm unit, where each finger unit includes two flexible finger joints and two phalanges; each flexible finger joint is divided into one upper layer and one lower layer of liquid crystal elastomer (LCE), and each LCE is used to implement a bidirectional bending movement of the finger unit. The present disclosure can precisely control the gripper with flexible finger joints.
An active-passive dual mode switchable vehicle suspension system is provided. The suspension system includes a filter, a hydraulic pump, a one-way valve, a power takeoff, a servo valve, a suspension cylinder, an overflow valve, an energy accumulator, a reversing valve, a first pressure sensor, a second pressure sensor, a controller, an oil tank and a displacement sensor. Further related is a switching method for the active-passive dual mode switchable vehicle suspension system. When the active and passive dual-mode switchable vehicle suspension system is switched between modes, an oil pressure in the rodless cavity of the suspension cylinder and an oil pressure in the energy accumulator are adjusted to be equal in advance, so that the stable switching of the active-passive suspension system can be realized, and the vibration of the vehicle body is eliminated when the existing active-passive suspension system is switched. Moreover, the accumulator and overflow valve can be shared in the active and passive suspension mode, thereby effectively reducing the use number of accumulators and overflow valves, greatly saving the layout space of the vehicle body, effectively reducing the total weight of the vehicle body, which is favorable to the lightweight of the vehicle chassis.
B60G 17/018 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
73.
Method and system for optimizing the joint hinge point position of a hydraulic tandem mechanism based on lightweight
The present invention relates to a method and system for optimizing the joint hinge point position of a hydraulic tandem mechanism based on lightweight. The method comprises: determining rotational load characteristics of each joint in the hydraulic tandem mechanism using dynamics simulation software based on said end load characteristics and said structural parameters of the tandem mechanism; establishing a fixed coordinate system between two adjacent rods in each joint and a joint global coordinate system, and determining the relationship between hinge point coordinates, joint rotation angle and joint drive force arm of each joint; calculating linear load characteristics of each joint according to said rotational load characteristics and said joint drive force arm to calculate hydraulic cylinder structural parameters and hydraulic oil source flow rate for each joint; determining a lightweight index for the joint hinge point position of the hydraulic tandem mechanism according to said hydraulic cylinder structural parameters and said hydraulic oil source flow rate; solving the coordinates of each joint hinge point of the tandem mechanism corresponding to the minimum of said lightweight index, using said lightweight index as a fitness function, so that the overall weight of the tandem mechanism is minimized.
The present invention provides a fractional order sliding mode synchronous control method for a teleoperation system based on an event trigger mechanism. The method comprises: establishing a dynamics model for the teleoperation system by considering external disturbance and parameter uncertainty, selecting a master robot and a slave robot, interactively establishing the teleoperation system through a communication network, determining system parameters of the dynamics model, designing a fractional order nonsingular rapid terminal sliding mode surface equation by utilizing a position tracking error and a fractional order calculus, setting a trigger event condition of information interaction between the master robot and the slave robot, designing a self-adaptive fractional order nonsingular rapid terminal sliding mode controller based on the sliding mode, designing a Lyapunov function to carry out stability analysis, proving the boundedness of a closed-loop state signal of the system.
The present invention relates to a device for forming bimetal composite pipe by spinning semisolid metal powder on outer wall of steel pipe, which comprises feeding device, clamping device, spinning roller, hot melting head, motor, lifting device, work table, buffer bearing pack, tailstock support device and heat preservation device. According to the invention, three spinning rollers are adopted, so that spinning efficiency is increased, uniform stress is ensured, and the semisolid powder is uniformly spun on the outer wall of the metal pipe; the spinning roller adopts a taper design, so that forming resistance of the spinning device in the axial moving process can be effectively reduced, and the semisolid powder is uniformly covered on the outer wall of the steel pipe; the lifting device is added, so that the lifting device can be adjusted according to different pipe diameters to process different metal pipes; spring is additionally arranged at the bottom of the first bearing seat to avoid and reduce rigid impact between the steel pipe and the spinning rollers in the spinning process and ensure uniform surface appearance and structure of a spinning layer; in addition, the device is driven by a motor, and a screw rod is used for driving the frame to axially translate at a constant speed.
B22F 7/04 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite layers with one or more layers not made from powder, e.g. made from solid metal
B21C 37/06 - Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided forManufacture of tubes of special shape of tubes or metal hosesCombined procedures for making tubes, e.g. for making multi-wall tubes
B22D 19/16 - Casting in, on, or around, objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
B22F 3/24 - After-treatment of workpieces or articles
B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
A consumption-free high-efficiency filter includes a tank body provided with a liquid outlet, a filter closure head provided with a liquid inlet and fixedly mounted with the tank body, a first group of support rings and second group of support rings that are respectively fixedly mounted at an upper end of the tank body and a lower end of the tank body, an upper cross support frame and a lower cross support frame, a mandrel, a first sliding bearing and a second sliding bearing used for rotatably mounting an upper end of the mandrel and a lower end of the mandrel, and a set of filter elements. Each filter element includes a filter element sleeve fixedly mounted on the mandrel, a blade and a filter loop.
B01D 33/42 - Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection concentrically or coaxially
B01D 33/15 - Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
77.
Preparation method of a zirconium-titanium-based alloy embedded aluminized layer
A preparation method of a zirconium-titanium-based alloy embedded aluminized layer includes putting a zirconium-titanium-based alloy and an aluminiferous penetrant into a mould from bottom to top in a sequence of a first penetrant layer, a first zirconium-titanium-based alloy, a second penetrant layer, a second zirconium-titanium-based alloy and a third penetrant layer, and compacting to obtain a mixed sample; sequentially covering a surface of a mixed sample with activated carbon powder and alkali metal halide, and then carrying out heating and cooling treatments to obtain a zirconium-titanium-based alloy embedded aluminized layer. The preparation method does not need to adopt a special heating furnace or carry out heat treatment under a vacuum condition in an actual application, which simplifies operation process and condition and is suitable for large-scale production and application due to few technical difficulties and low equipment investment cost.
A rigid-flexible coupling multi-degree-of-freedom walking position-adjusting leg unit and a hybrid robot platform thereof is provided and includes a vertical rigid-flexible coupling multi-degree-of-freedom walking position-adjusting leg unit and a horizontal rigid-flexible coupling multi-degree-of-freedom walking position-adjusting leg unit, which both include a moving device, a moving drive, a steering frame, a lifting frame, a spring device and a driving differential wheel set, in combination with a frame, a driver set, a battery pack and a control box, forming a multi-degree-of-freedom parallel mechanism platform. The hybrid robot platform including the rigid-flexible coupling multi-degree-of-freedom walking position-adjusting leg unit as provided by the present disclosure has functions of a rigid position adjustment, an elastic suspension and a rigid-flexible coupling position adjustment, and can automatically adapt to a working condition of the uneven ground.
B60G 17/015 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
B60G 11/14 - Resilient suspensions characterised by arrangement, location, or kind of springs having helical, spiral, or coil springs only
The invention provides a double station vacuum die casting machine, comprising a driving device, a first die casting unit, a second die casting unit, a feeding component, a vacuum pump and a housing, the vacuum pump is arranged outside the housing, the driving device is arranged inside the housing, and the first die casting unit and the second die casting unit are respectively arranged on both sides of the driving device; the driving device comprises a driving unit, a first injection rod assembly and a second injection rod assembly, the first injection rod assembly and the second injection rod assembly are respectively arranged on both sides of the driving unit, the first injection rod assembly is used to provide power for die casting of the first die casting unit, and the second injection rod assembly is used to provide power for the second die casting unit.
B22D 17/20 - AccessoriesPressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure Details
B22D 17/22 - DiesDie platesDie supportsCooling equipment for diesAccessories for loosening and ejecting castings from dies
A super-tough steel and a production method thereof. The present invention belongs to the field of steels and preparation thereof, and particularly relates to a super-tough steel for cryogenic services, and a production method thereof. The super-tough steel comprises the following elements in percentage by weight: 0.10% to 0.15% of C, and 29.5% to 31.5% of Mn, with the balance being Fe and inevitable impurities. The production method comprises the following steps: A1, smelting with argon protection, and electroslag remelting; A2, hot rolling or hot forging; A, annealing at 900° C. to 1100° C. for 1 hour, and quenching; and A4, cold rolling, annealing of the cold-rolled plate at 700° C.-1200° C. for 1 hour, and quenching after annealing. The steel is simple in composition and does not contain precious metals; and the steel has an average grain size of less than 30 microns, and is non-magnetic with complete face-centered cubic structure. The steel has outstanding performance at cryogenic temperatures, and its cryogenic impact energy exceeds all currently known metallic materials.
An active-passive differential series-parallel connection supporting leg, a gravity-based closing series-parallel connection supporting leg, and a six-degree-of-freedom position-adjusting robot platform are provided. The six-degree-of-freedom position-adjusting robot platform is formed of a plurality of legs distributed in parallel, and includes a frame, a distributed controller, and multi-chain parallel legs, wherein a plurality of legs are fixedly connected with the frame through a base. The present disclosure integrates an omnidirectional movement and position adjustment to solve problems that the existing position-adjusting platform is fixed or moved inflexibly, the structure is over complicated, the occupation space is excessive, and the movement error is large, and thereby effectively expanding application range of the six-degree-of-freedom position-adjusting robot platform.
B62D 61/06 - Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern with only three wheels
B60G 17/015 - Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
B60K 1/02 - Arrangement or mounting of electrical propulsion units comprising more than one electric motor
B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
B62D 61/02 - Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern with two road wheels in tandem on the longitudinal centre line of the vehicle
B62D 61/10 - Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern with more than four wheels
83.
DIAMOND COMPOSITE PHASE MATERIAL AND PREPARATION METHOD THEREFOR
Provided are a diamond composite phase material and a preparation method therefor. Onion carbon is used as a raw material, and a novel diamond composite phase bulk material containing multiple types of diamond phases of 3C, 2H, 4H, 6H, 8H, 10H, 9R, 15R and 21R is prepared by means of a high-temperature and high-pressure synthesis method. Two or more types of diamond phases of 2H, 3C, 4H, 6H, 8H, 9R, 10H, 15R and 21R can be found in the crystal grains of the bulk material. Among them, the 3C type diamond has an ultra-fine nano-twin crystal structure with a twin crytal width of 1-15nm. The diamond composite phase bulk material has an internal grain size of 2-80 nm, a Vickers hardness of 150-260 GPa, and a fracture toughness of 12-30 MPa m1/2. The diamond composite phase bulk material has broad applications in the fields of precision and ultra-precision machining, wire drawing dies, abrasives and special optical components.
The present invention discloses a rolling-bulging forming hydraulic machine for tubular products, which includes a frame. The frame is provided with an upper rolling mechanism, a lower rolling mechanism, a fixed liquid bulging hydraulic cylinder and a movable liquid bulging hydraulic cylinder. The upper rolling mechanism and the lower rolling mechanism are arranged oppositely, and the upper rolling mechanism and the lower rolling mechanism are used to roll surfaces of a to-be-machined tubular product. The fixed liquid bulging hydraulic cylinder and the movable liquid bulging hydraulic cylinder are arranged oppositely, and the fixed liquid bulging hydraulic cylinder and the movable liquid bulging hydraulic cylinder are used to perform hydraulic bulging on the to-be-machined tubular product.
B21B 13/02 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
B21B 13/10 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
F16C 29/00 - Bearings for parts moving only linearly
85.
Device and method for strengthening thin-walled straight pipe
A device for strengthening a straight pipe, including a first positioning mold, a second positioning mold, a split mold, a rounding mold, a first cavity and a second cavity. A method for strengthening a straight pipe is further provided. The split mold is adjusted to position the pipe. The pipe is inserted into the first and second positioning molds. First and second sealing rings are arranged in an inner cavity of the pipe. Hydraulic oil is injected into the first cavity to expand the pipe to perform an expanding deformation. When the hydraulic oil is unloaded, the split mold moves towards an axis of the first positioning mold to perform a reducing deformation. After the expanding and reducing deformations, the pipe is transported into the rounding mold, and hydraulic oil is injected into the second cavity to expand the pipe to perform the rounding.
The disclosure provides a micro control device for simulating the electric thermal field change of a plate/strip, comprising a plate shape simulating test platform, a high current regulating power supply, a current regulating device, a thermal imager, a thermocouple, a non-contact type full field strain gauge, a high-power current control device and an electro-plastic control system; for a plate/strip with large width to thickness ratio and high hardness and brittleness alloy, different numbers of electrodes are arranged laterally along the movable supporting beam. A high-power current control device is used to realize the sub-regional control of the electric field, thermal field and stress field of the plate/strip; at the same time, the movable supporting beam and tension sensor are used to test the working conditions of the plate/strips with different lengths and widths, to simulate the instantaneous synchronous entanglement process between different fields. An electro-plastic control system is used to realize the intelligent closed-loop control of specific working conditions. The device provides a high-precision physical test platform for studying the non-uniform electro-plastic effect of a high width to thickness ratio and high hardness brittle strip during an actual rolling process, and adds a new and high-efficiency adjustment method to the traditional rolling mill system.
C21D 1/04 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
B21B 9/00 - Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of workSpecial measures for removing fumes from rolling mills
B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
C21D 11/00 - Process control or regulation for heat treatments
87.
Heterojunction bipolar transistor and preparation method thereof
The disclosure provides a heterojunction bipolar transistor and a preparation method thereof. Since an emitter region has the same physical structure as a base region, and improves frequency characteristics of the device; Simultaneously with biaxial strain, uniaxial strain is introduced. Carrier transmission time in the collector region will be effectively reduced. By this structure, the width of the effective collector region is reduced, the collector junction capacitance is reduced, and the frequency characteristics of the device are further improved; an appropriate choice of the thickness of the Si cap layer can effectively reduce the accumulation of carriers at an interface and increase the gain of the device; at the same time, the preparation method of the bipolar transistor is completely compatible with a 90-nanometer CMOS process, which effectively reduces the development and manufacturing cost of the device.
The present invention discloses a Fire-fighting water cannon comprising: a first motor assembly including a first housing, a first stator assembly, a first rotor assembly and a central shaft; both ends of the first housing are respectively provided with a first end cover and a second end cover, the first end of the first stator assembly is connected with the second end cover, the first rotor assembly is sleeved on the outside of the first stator assembly, and the first rotor assembly is rotatably connected with the first housing; the cannon head assembly including a first cannon head and a second cannon head, the first cannon head is connected with the first stator assembly, the second cannon head is sleeved on the outside of the first cannon head, and the second cannon head is threadedly connected with the first rotor assembly, the first cannon head is provided with a first anti-rotation device; the cannon core assembly is arranged on the central axis and cooperates with the cannon head assembly. With this arrangement, the switching of the spray state of the Fire-fighting water cannon is controlled by electrical signals, which makes the switching easier and faster, the spray state of the Fire-fighting water cannon can be accurately controlled to meet the needs of various working environments and achieve the effect of saving energy and resources.
A62C 31/03 - Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice-versa
B05B 1/12 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means capable of producing different kinds of discharge, e.g. either jet or spray
89.
ROLLING MILL PROVIDED WITH SINGLE-EDGED ROLLER SYSTEM AND PLATE ROLLING METHOD
A rolling mill provided with a single-edged roller system (100), the rolling mill comprising a frame (110), an upper roller system (140) and a lower rolling plate apparatus (170); the upper roller system is installed horizontally on the frame and comprises an upper roller (142) that can rotate about the horizontal axis; the lower rolling plate apparatus is provided below the upper roller and comprises a lower rolling plate (171); and a roller gap is provided between the upper roller and the lower rolling plate, and a rolling piece passes through the roller gap so as to be rolled. Also disclosed is a plate rolling method, which uses the described rolling mill provided with a single-edged roller system for rolling. The rolling mill and the method achieve the function of asymmetric rolling, increase the horizontal component of normal pressure, change the stress state of a rolling piece, and can further reduce rolling force, improve the shearing effect, and enhance the plastic deformation capabilities.
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 13/02 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
90.
Heating system for drill steel pipe billet and heating method thereof
2 of three flamethrowers, a propulsion device, a positioning device, a heating device, a temperature measuring device and a conveying device. Heating temperature of the flamethrowers is controlled by an oxygen distribution box and a gas distribution box. A heating method for the drill steel pipe billet is also provided, in which a rolling forming method of gradient flame heating is adopted to control density of the rolled pieces and avoid internal defects of the drill steel caused by the same deformation of the traditional uniformly heated pipe billets. A radial temperature of the drill steel pipe billet is accurately controlled through the feedback device. Only one set of flamethrowers corresponding to drill steel pipe billets of different dimensions is required, and other devices are universal components, which will not be replaced.
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
B23K 7/10 - Auxiliary devices, e.g. for guiding or supporting the torch
The present invention relates to a 4D printing-based flexible finger joint gripper and a trajectory tracking control method therefor. The 4D printing-based flexible finger joint gripper comprises a palm unit and five finger units connected to the palm unit; each finger unit comprises two flexible finger joints and two phalanges, each flexible finger joint is divided into upper and lower LCE liquid crystal elastomers, and the LCE liquid crystal elastomers are used for realizing bidirectional bending movement of the finger units. According to the present invention, the flexible finger joint gripper can be accurately controlled.
Disclosed is a soft joint gripper based on 4D printing, the gripper comprising a palm body (6) and five soft finger units (1-5) connected to the palm body (6), wherein each of the soft finger units (1-5) is provided with two soft finger joints (11, 12) and two phalanges (13, 14); the phalanges (13, 14) are made of resin by means of 3D printing; the soft finger joints (11, 12) are two symmetrical double-layer film soft finger joint actuators; the double-layer film soft finger joint actuators are made of a liquid crystal elastomer (7) and a polyimide electrothermal film (8) by means of 4D printing; the bending angle of each double-layer film soft finger joint actuator is changed by means of energization or heating stimulation; and the double-layer film soft finger joint actuators are used for controlling the soft finger units (1-5) to perform a reversible bending motion. Accurate control over the soft joint gripper can be achieved. The present application further relates to a consistency control method for a soft joint gripper based on 4D printing.
A method of forming a cylinder by spinning. A cylindrical blank is placed at a geometric center of a lower mold cavity, where a bottom of the lower mold cavity is provided with a straight hole, and a blank block is provided at the straight hole. The lower mold cavity is fixed on a rotating worktable such that the blank is directly below an upper indenter. The indenter is driven by an extruder to move vertically downwards to extrude the cylindrical blank. Meanwhile, the lower mold cavity is driven by the worktable to uniform rotate. The intender is kept still, and the lower mold cavity is continuously driven to rotate. The lower mold cavity moves vertically upwards to process an outer surface of the blank by rotation of a petal-shape inner wall. The formed cylinder is separated from the lower mold cavity to obtain the desired cylinder.
A lightweight 4-degree-of-freedom leg mechanism of a bionic quadruped robot, which includes a hip-joint lateral-swing assembly, a thigh longitudinal-swing assembly and a shank longitudinal-swing assembly. The hip-joint lateral-swing assembly includes a hip-joint swing cylinder and an electro-hydraulic actuator. One end of the electro-hydraulic actuator and one end of the thigh longitudinal-swing assembly are respectively connected to the hip-joint swing cylinder via a connecting block. The other end of the electro-hydraulic actuator is hinged to a side of the thigh longitudinal-swing assembly. The other end of the thigh longitudinal-swing assembly is hinged to the shank longitudinal-swing assembly.
B62D 57/032 - Vehicles characterised by having other propulsion or other ground-engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members with alternately or sequentially lifted supporting base and legVehicles characterised by having other propulsion or other ground-engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members with alternately or sequentially lifted feet or skid
A symmetrical tri-axial parallel spindle head capable of multi-directional fixed-point rotation, comprising three branch chains (2), a moving base (5), and a fixed base (1). A machining spindle (6) is fixedly connected onto the moving base (5). Each of the branch chains (2) comprises a servo motor (22), a branch chain rod (21), a lead screw (23), and a guide nut (25). The lead screw (23) and a linear guide rail (24) are provided in an inner cavity on one end of the branch chain rod (21). One end of the lead screw (23) is connected to the servo motor (22), the lead screw (23) passes through the guide nut (25), and the other end of the lead screw (22) is connected to the branch chain rod (21) by means a rotating pair. The guide nut (25) is mounted on the linear guide rail (24) and is rotatably connected to the fixed base (1) through a first support disc (26). The other end of the branch chain rod (21) is rotatably connected to the moving base (5) through a second support disc (28). The symmetrical three-axial parallel spindle head not only can enable the tool to achieve multi-directional fixed-point rotation around any point within a certain range of the internal space of the moving and fixed platforms merely by the parallel spindle head structure itself, but also can achieve multi-directional fixed-point rotation around the tool tip point; and the spindle head structure is symmetrical, and the motion characteristic is also symmetrical.
B23C 1/12 - Milling machines not designed for particular work or special operations with spindle adjustable to different angles, e.g. either horizontally or vertically
B23Q 1/54 - Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only two rotating pairs only
96.
Dynamic contact heat transfer simulation device for rolling heavy-load deformation zone
The present invention provides a dynamic contact heat transfer simulation device for rolling heavy-load deformation zone. The device includes a control system, a data acquisition system, a pressure-adjustable fixed cold end, a rotating chuck, a temperature-adjustable heat-conducting rod and an speed-adjustable rotation hot end; the device utilizes the rotating chuck and the speed-adjustable rotating hot end to adjust the rotation speed in real time according to the actual rolling conditions, simulate the working conditions of the actual rolling heavy-load deformation zone, and accurately obtain the dynamic heat transfer coefficient of the rotating contact interface under variable load pressure conditions.
G09B 23/16 - Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes for physics for science of heat
B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
G09B 25/02 - Models for purposes not provided for in group , e.g. full-sized devices for demonstration purposes of industrial processesModels for purposes not provided for in group , e.g. full-sized devices for demonstration purposes of machinery
G01K 3/00 - Thermometers giving results other than momentary value of temperature
97.
Class of over-constrained two-rotation parallel mechanism with same kinematics
The present invention relates to a class of over-constrained two-rotation parallel mechanism with same kinematics, which comprises a base, a moving platform and four branches connecting the base and the moving platform, wherein the base and the moving platform are equilateral triangles, both ends of each of the first branch, the second branch and the third branch are respectively connected to end points of the base and the moving platform, both ends of the fourth branch are respectively connected to center points of the base and the moving platform, the first branch and the third branch both consist of a first rotating pair. The parallel mechanism of the present invention has a large rotation space and high rigidity, and can be used for positioning equipment such as missile launchers.
The present invention discloses a magnetic rolling bearing capable of reducing the balance radial force of the gear pump, which includes a magnetized inner ring, a rolling body, a cage, and a magnetized outer ring assembly. The inner ring is magnetized to make the inner and outer ring surfaces of the magnetized inner ring have different magnetic properties; the magnetized outer ring assembly consists of four components, namely an upper ring surface of the magnetized outer ring assembly, a lower ring surface of the magnetized outer ring assembly, and two components in left and right. The left and right components are not magnetized, they are connected by recesses and are fixed with bolts, and the four components are alternately connected to form a complete ring.
F16C 19/06 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row of balls
G01R 33/038 - Measuring direction or magnitude of magnetic fields or magnetic flux using permanent magnets, e.g. balances, torsion devices
99.
Full-state control method for the master-slave robot system with flexible joints and time-varying delays
A full-state control method for a master-slave robot system with flexible joints and time-varying delays is provided. In a teleoperation system formed by connecting a master robot and a slave robot through network, a proportional damping controller based on a position error and velocities, and a full-state feedback controller based on backstepping are designed for the master robot and the slave robot, respectively. High-dimension uniform accurate differentiators are designed to realize an exact difference to the virtual controllers. Delay-dependent stability criteria are established by constructing Lyapunov functions. Therefore, the criteria for selecting controller parameters are presented such that the global stability of the master-slave robot system with flexible joints and time-varying delays is realized. For the master-slave robot system with flexible joints, the global precise position tracking performance is realized by adopting a full-state feedback controller based on the backstepping method and the high-dimensional uniform accurate differentiators. Moreover, the global asymptotic convergence of the system is guaranteed and the robustness of the system is improved.
The present invention discloses an annular cooling device for large-scale cylindrical shell, which comprises a plurality of inner jet devices and outer jet devices; the inner jet devices are arranged inside the cylindrical shell along the inner periphery; the outer jet devices are arranged outside the cylindrical shell along the outer periphery; each inner jet device and each outer jet device are oppositely arranged; the inner jet devices are used for spraying cooling medium to the inner wall of the cylindrical shell; the outer jet devices are used for spraying the cooling medium to the outer wall of the cylindrical shell; and the spray ranges of each inner jet device and each outer jet device in the axial direction of the cylindrical shell are both greater than the length of the cylindrical shell.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
B21B 27/10 - Lubricating, cooling, or heating rolls externally
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