50results about How to "Strong achievability" patented technology

The invention discloses a hydrophone low-frequency sensitivity calibration method based on time domain scaling average processing, relates to the technical field of hydrophone low-frequency sensitivity calibration, and solves the problem of inaccurate direct sound wave amplitude measurement caused by boundary sound reflection superposition of an experimental pool and a measuring device in hydrophone calibration. Comprising the following steps: placing a light-reflecting and sound-transmitting thin film in a water body, and carrying out transducer and thin film laying and laser focusing; the underwater sound pressure value is reproduced based on a laser interference method; when reflection sound and direct sound superposition occurs in low-frequency measurement data, adjacent frequency points are selected to carry out multiple times of measurement. The arrival time of the direct sound is accurately measured by transmitting the high-frequency sound pulse, so that alignment of starting points of waveform data with different frequencies is realized; when low-frequency measurement is carried out, not only data of the inspected frequency is collected, but a narrow frequency band near the inspected frequency is selected, and multi-frequency-point data is sequentially collected and subjected to subsequent algorithm processing.

A signal identification method based on priori knowledge integration and result self-adaption comprises a model construction step, a model application step and a knowledge updating step, a Bayesian network is constructed to realize preliminary pre-sorting of a large number of radio signals, and the identification efficiency is improved; a Bayesian neural network is constructed, and the cognition degree and range of signal modulation recognition are enriched; and finally, updating the Bayesian network by using a result after modulation identification, and realizing iterative integration of priori knowledge and result-adaptive signal identification in a multi-dimensional environment. According to the method, a two-stage network structure is formed, the Bayesian network is used for integrating and updating knowledge and playing a preliminary screening role, the Bayesian neural network is used for calculating a signal recognition result and the confidence coefficient of the signal recognition result, the non-binary conclusion of traditional signal recognition is broken through, and the screening speed and robustness are improved while the signal screening precision is guaranteed.

The spherical phased-array antenna efficient heat dissipation assembly comprises an upper-layer thermal control board, a bottom-layer thermal control board, a thermal control fan and the like, and the upper-layer thermal control board, a right side supporting arm, the bottom-layer thermal control board and a left side thermal control supporting arm are jointly spliced to form a heat dissipation air channel cavity; heat dissipation teeth in the air duct direction are designed on an upper-layer thermal control plate, a bottom-layer thermal control plate and a left-side thermal control supporting arm on the inner wall of an air duct cavity, and thermal control fans and fan dust covers are installed in front of and behind the cavity, so that the heat dissipation requirements of all modules installed on the upper-layer thermal control plate, the bottom-layer thermal control plate and the left-side thermal control supporting arm are efficiently met; the production cycle of the whole machine is greatly shortened, meanwhile, the production cost is reduced, sealing measures are designed at the mounting positions of the efficient heat dissipation assembly and the antenna housing and the base and at the splicing positions of the upper-layer thermal control board and the right side supporting arm, an air duct cavity is only communicated with the outside and completely isolated from internal devices of the product, and the adaptability of the product is improved.

The invention relates to a thin film probe card structure and method for balancing elastic coefficient difference between probes. The thin film probe card structure comprises a support body, a thin film (1), a signal metal layer (11), a grounding metal layer (12), a grounding probe (2) and a signal probe (3), wherein the support body is provided with an acting surface; the thin film (1) covers the acting surface; the signal metal layer (11) is divided into first wires (111) corresponding to the signal probes (3), and the signal probes (3) are electrically connected with the corresponding first wires (111). The device is characterized in that the grounding probes (2) are electrically connected with the grounding metal layer (12) through an elastic coefficient balancing structure, so that the elastic coefficient of each grounding probe (2) tends to approach the elastic coefficient of the signal probe (3).

The invention discloses an aerodynamic characteristic test device and an aerodynamic characteristic compensation correction method in a water surface aircraft pool test environment, during an aerodynamic characteristic test in the water surface aircraft pool test environment, a towing device drives a side bridge, a heave rod, a navigation rod and an attitude control rod to move at the same time, and under the traction of a navigation piece, the attitude control rod is driven to move at the same time; the water surface aircraft model, the six-component balance, the single-component balance and the angle sensor cooperatively move along the course, and the six-component balance, the angle sensor and the single-component balance respectively record the gravity center position, the aerodynamic lift Lmf, the resistance Dmf, the attitude angle theta of the water surface aircraft model in the pitching direction and the tail aerodynamic lift Lma of the water surface aircraft model in the movement process; and a comprehensive aerodynamic characteristic data graph under the physical pool environment is formed. The operation method provided by the invention is simple and effective, and can directly support all water surface aircrafts to carry out lift compensation analysis.

The invention discloses an underwater route planning method and device based on an electronic chart. According to the method, underwater route planning is carried out based on the electronic chart, marine environment elements are fully considered, route planning point positions with timestamps can be given, the course, the voyage and the navigational speed of each subsection route can be calculated, and the method has important guiding significance for operation and control of the underwater vehicle. According to the method, the given task can be efficiently completed with low cost, and the method can be applied and popularized in the field of underwater navigation safety.

The invention belongs to the technical field of digital signal processing, and particularly discloses a space-time interference cancellation algorithm parallelization FPGA implementation device and method, and the device comprises an input vector generation module which delays and arranges reference signals of multiple channels, and obtains space-time input vectors of the reference signals; the correlation matrix calculation module is used for acquiring an autocorrelation matrix and a cross-correlation vector; the matrix decomposition module is used for performing matrix decomposition on the autocorrelation matrix to obtain an upper triangular matrix; the weight determination module is used for carrying out weight solving by utilizing the upper triangular matrix and the cross-correlation vector to obtain an optimal weight; the delay matching module is used for delaying the reference signal and carrying out time sequence alignment on the reference signal and the optimal weight to obtain a delay matching result; and the weighting and combining module is used for weighting the reference signals subjected to the time sequence alignment according to the optimal weight to obtain weighted signals and combining the weighted signals with the received signals so as to realize interference elimination of the received signals. According to the invention, the real-time tracking capability can be improved and the processing delay can be reduced.

The invention relates to the technical field of hydrogen production systems, and particularly discloses a PEM hydrogen production energy-saving system and a control method thereof.The system comprises a comprehensive safety water tank, a water adding pump, an oxygen separator, a pure water circulating pump, an ion filter, a PEM tank, a hydrogen separator, a buffer tank and a hydrogen production power source; a water supplementing opening is formed in the comprehensive safety water tank, the inner bottom side of the comprehensive safety water tank is connected with the inlet end of a water adding pump through a pipeline, and the outlet end of the water adding pump is connected with the first inlet end of an oxygen separator; the outlet end of the oxygen separator is connected with the inlet end of the ion filter through the pure water circulating pump, the outlet end of the ion filter is connected with the inlet end of the PEM groove, the outlet end of the PEM groove is connected with the inlet end of the hydrogen separator and the second inlet end of the oxygen separator, and the outlet end of the hydrogen separator is connected with the inlet end of the comprehensive safety water tank through the buffer tank. And the hydrogen production power supply is connected with the PEM groove. According to the invention, water on the hydrogen side can be recycled under a safe condition, so that the purpose of saving energy is achieved.

The application relates to a linear sweep frequency laser generating device, which comprises a semiconductor laser, a driving circuit, a laser beam splitter, a laser frequency discriminator unit, a radio frequency signal generating unit and a laser frequency shift unit; the semiconductor laser is controlled by the driving circuit to generate sweep frequency laser, and is divided into two beams by the laser beam splitter and enters the laser frequency discriminator unit and the laser frequency shift unit respectively; the laser frequency discriminator unit extracts a nonlinear sweep frequency component of the sweep frequency laser and generates a control signal to control the radio frequency signal generating unit; the radio frequency signal generating unit generates a radio frequency signal with a frequency opposite to that of the nonlinear sweep frequency component according to the control signal to drive the laser frequency shift unit; the laser frequency shift unit modulates the frequency of the radio frequency signal on the input light frequency to offset the nonlinear sweep frequency component of the sweep frequency laser and output linear sweep frequency laser. Compared with the prior art, the application has the advantages of high sweep frequency rate, large sweep frequency range and linear sweep frequency laser.

This invention discloses an IoT-based electronic hardware system for agricultural environmental monitoring, aiming to solve problems such as low monitoring accuracy, weak anti-interference capability, and poor adaptability in different agricultural scenarios. The system adopts a core architecture of multispectral coupled sensing, layered anti-interference packaging, dual-mode communication, and neural network self-calibration, making it adaptable to various scenarios such as desert oases, tea gardens, and northern arid lands. By optimizing the sensing unit, strengthening the protective structure, and implementing adaptive power supply and real-time calibration algorithms, it achieves accurate monitoring of multiple dimensions, including temperature and humidity, soil / water quality parameters, and crop status. Its simple structure, convenient installation, strong resistance to interference from wind, sand, freeze-thaw cycles, and high humidity, and stable data transmission provide reliable data support for precise agricultural production management, adapting to various agricultural environmental monitoring needs.

The invention provides a semiconductor device, a manufacturing method thereof and an electronic device, and the method comprises the steps: providing a substrate, and forming a body region and a drift region in the substrate; sequentially forming a liner layer and a mask layer on the surface of the substrate; patterning the liner layer and the mask layer to expose a part of the drift region, and etching the substrate to form a groove in the drift region; performing an inclined ion implantation process to form a barrier layer at the bottom and on the side wall of the groove; removing the barrier layer at the bottom of the groove; a field oxide layer is formed, the groove is filled with the field oxide layer, and the top face of the field oxide layer is higher than the surface of the substrate; sequentially removing the mask layer and the liner layer; and forming a gate structure, wherein the gate structure covers a part of the field oxide layer and covers the surfaces of a part of the body region and a part of the drift region. The barrier layer is formed on the side wall of the groove, and the barrier layer can prevent the beak effect from being generated when the field oxide layer is formed, so that the approximately vertical field oxide layer is formed, and the performance of the device is improved.

The invention discloses a PSD-based high-precision sun sensor system design and calibration method, which combines the performance of a PSD detector and the application scene of a sun sensor, analyzes matters needing attention in the design process of the PSD sun sensor, and provides an innovative method suitable for effective trepanning of a light shield of the PSD detector. And the influence of the saturation current of the PSD detector on the output solar incident angle is effectively solved. Meanwhile, errors existing in the PSD sun sensor are analyzed, a novel high-precision sun component angle calibration scheme is provided, angle calibration of the sun sensor is achieved by combining a curve fitting algorithm and a curved surface fitting algorithm, and the method can be completed only through a small amount of calculation in sun sensor hardware and is easy to achieve. Finally, the PSD sun sensor designed by the invention has the advantages of low energy consumption, fast response, low cost, small volume, strong radiation resistance and the like in the aspect of precision improvement.

The invention discloses a rocket-borne large-spacing ultra-wideband conformal phased-array antenna, and belongs to the technical field of phased-array antennas. The antenna comprises a rocket body conformal metal carrier, a metasurface layer, an antenna layer, a parasitic layer, a metal floor and a fixing structure, wherein the antenna layer is formed by periodically arranging dual-polarization orthogonal active antenna units, vertical polarization units are linearly arranged along the axial direction, and horizontal polarization units are conformally bent along the cylindrical surface side of a rocket body; the parasitic layer is composed of passive parasitic units which are correspondingly arranged, the passive parasitic units and the active antenna units are alternately arranged in an orthogonal grid mode, and reverse current is excited by arranging a short-circuit strip so that H-face harmful common-mode resonance can be restrained. The antenna provided by the invention realizes nine frequency doubling bandwidths in a horizontal line polarization direction and a vertical line polarization direction, and realizes + / -60-degree grating lobe-free wide-angle scanning of an azimuth plane when an array spacing is 0.7-0.9 lambda H by adopting a rocket body conformal mode.

The invention provides an ultra-wide-angle free-form surface catadioptric image space telecentric lens, a design method thereof and an imaging system, which are used for solving the technical problem that an existing ultra-wide-angle lens is generally a transmission-type lens and is difficult to observe plasmas in an environment with a relatively large temperature difference. According to the ultra-wide-angle free-form surface catadioptric image space telecentric lens, the high-temperature environment during observation of plasmas in a Tokamak device is fully considered, the reflection light path is innovatively added, the lens is divided into the aperture diaphragm, the reflection light path and the transmission light path, the aperture diaphragm and the reflection light path are made of metal materials, and the transmission light path is made of metal materials. The device is arranged in a high-temperature vacuum chamber between a first observation window and a second observation window of a Tokamak device, and each lens in a transmission light path is made of a traditional lens material and is arranged in an external room-temperature environment. The whole ultra-wide-angle free-form surface catadioptric image space telecentric lens can stably observe plasma when the Tokamak device works.

The embodiment of the invention relates to the technical field of ultra-wideband high-power emission, in particular to an ultra-wideband high-power signal monitoring circuit which comprises a high-power amplifier, a directional coupler, an attenuation matching module, a detection module, an operational amplification module and a comparison unit. The monitoring circuit couples an input microwave radio-frequency signal of a high-power amplifier based on a directional coupler and a corresponding reflection microwave radio-frequency signal, respectively performs attenuation matching and detection, then enters a comparison circuit, converts the input microwave radio-frequency signal and the reflection microwave radio-frequency signal into a standing-wave ratio and compares the standing-wave ratio with a threshold value, and if the standing-wave ratio is smaller than the threshold value, the monitoring circuit is started. If the standing-wave ratio is greater than or equal to the threshold value, outputting a low level for the control circuit to turn on a drain power supply of the high-power amplifier, and if the standing-wave ratio is greater than or equal to the threshold value, outputting a high level for the control circuit to turn off the drain power supply of the high-power amplifier, thereby preventing the high-power amplifier from being damaged due to high-power reflection.

The invention provides a fault detection method and device for a motor bearing, equipment and a storage medium, and the method comprises the steps: determining a fault feature order corresponding to a specific part for each specific part in a plurality of specific parts based on a parameter value of a target part of the motor bearing and the rotating speed of a motor rotor shaft; based on the fault feature order, the torque and the rotating speed of the motor are obtained; determining vibration data of the motor bearing based on the torque and the rotating speed; and determining a fault part in a plurality of specific parts based on the vibration data and the fault feature order. By adopting the technical scheme provided by the invention, the maintenance cost can be reduced, the efficiency can be improved, the operation is simple and convenient, and the realizability is high. In addition, the power assembly is good in universality, can be applied to the development stage of motor products, and is also suitable for power assembly products of other types.

This invention discloses an environmentally friendly, high-efficiency permeability-reducing composite material for sand and its applications. The environmentally friendly, high-efficiency permeability-reducing composite material comprises xanthan gum, nano-silica, and pectinase, used to improve the strength and reduce the permeability of sand. The invention first mixes sand and soil in equal proportions to obtain clayey sand, then incorporates the environmentally friendly, high-efficiency permeability-reducing composite material to obtain remolded sand. Permeability tests, triaxial shear tests, and microscopic tests on the remolded sand show that after incorporating the environmentally friendly, high-efficiency permeability-reducing composite material, gel material is uniformly distributed on the surface and within the pores of the remolded sand, forming a non-penetrating pore structure within it, reducing the permeability of the remolded sand. Furthermore, long-term curing can improve the strength and ductility of the remolded sand. The environmentally friendly, high-efficiency permeability-reducing composite material provided by this invention is environmentally friendly, efficient, low-cost, and applicable to multiple scenarios, with broad application prospects.

The invention provides a remote sensing satellite system level class I single point fault mode identification method based on information fusion, and the method comprises the steps: determining a remote sensing satellite main task according to user requirements, building a task profile, and determining a remote sensing satellite system level class I unexpected event in combination with a use environment and constraint conditions; the method comprises the following steps: establishing a fault tree by taking each system-level class-I unexpected event as a top event in sequence, carrying out fault tree analysis FTA from top to bottom, carrying out failure mode and influence analysis FMEA from bottom to top, carrying out redundancy three-element analysis aiming at all subsystems and important single machines as well as primary and secondary functions of a remote sensing satellite, carrying out effectiveness analysis on each redundancy design, and carrying out fault analysis on each redundancy design. And finally determining I-type single-point fault modes of the remote sensing satellite system, and forming an I-type single-point fault mode list. According to the method, the accuracy and comprehensiveness of remote sensing satellite system-level single-point identification can be practically improved, the risk of satellite models can be effectively reduced, the reliability is improved, the realizability is high, and the method has remarkable engineering value.

The invention discloses a joint type rocker arm dynamic cylinder closing valve control mechanism and a working method, solves the problem that in the prior art, a valve control mechanism is prone to damage, and has the beneficial effects of being reliable in structure and high in stability. Comprising a driving rocker arm and a driven rocker arm, one side of the driven rocker arm is connected with an air valve, the driven rocker arm is rotatably connected with the driving rocker arm, the other side of the driven rocker arm is hinged to one end of a joint component, the joint component comprises a plurality of joints, every two adjacent joints are movably connected, and the other end of the joint component is movably connected with the driving rocker arm. The connecting end of the driving rocker arm and the joint component is matched with the cam shaft, the driving rocker arm is provided with a control component, the control component acts to enable the joint component to break away from the limiting face of the driving rocker arm, and the cam shaft pushes the driving rocker arm to move to enable the joint component to bend and drive the driven rocker arm to rotate.

The self-adaptive inclusion formation control method for the heterogeneous singular multi-agent system comprises the following steps: firstly, constructing the heterogeneous singular multi-agent system, and describing inclusion formation control of the heterogeneous singular multi-agent system; designing an adaptive state feedback formation controller and an adaptive dynamic output formation controller; secondly, converting a formation control problem into an infinite norm constraint problem by designing state transformation of a closed-loop system under the action of an adaptive state feedback formation controller; then, in combination with pulse-free analysis and stability analysis, a heterogeneous singular multi-agent system inclusion formation control method under the action of the adaptive state feedback formation controller is obtained; and finally, obtaining the heterogeneous singular multi-agent system including formation control method according to the state transformation of the closed-loop system under the action of the self-adaptive dynamic output formation controller. According to the method, the formation control of the heterogeneous singular multi-agent system is realized, and the virtual leader matrix information can be quickly estimated.

The invention provides a molten steel refining method adopting an RH vacuum refining system, and the RH refining process comprises the following steps: pretreatment: after a steel ladle enters an RH refining station, inserting an RH dip pipe below the liquid level of molten steel; vacuum refining is conducted, specifically, vacuumizing is conducted, argon is blown into an ascending pipe of the RH dip pipe, when the pressure in a vacuum chamber reaches 20-200 Pa, the ascending pipe of the RH dip pipe is adjusted to lift the gas flow, and when the pressure in the vacuum chamber reaches the ultimate vacuum and the gas flow can be stably lifted, vacuum refining is completed; the inclined angle between each argon blowing hole and the horizontal plane is 30 degrees; alloying is conducted, specifically, the molten steel is alloyed in the RH vacuum refining treatment process; after alloying is completed, the components of the molten steel are detected, and if soft blowing treatment needs to be conducted on the molten steel, soft blowing is conducted on the molten steel; and if soft blowing is not needed, the RH refining of the molten steel is completed. The inclination angle of the argon blowing gas hole is changed, the lifting force of the blown gas to the molten steel is increased, then the circulating flow of the molten steel in the RH is increased, the cleanliness of the molten steel is improved, and therefore the steel product quality is improved.

The invention discloses a device and a method for rapidly detecting the alcoholic strength of white spirit based on a fluorescent indicator and a smart phone. The method comprises the following specific steps: firstly, preparing a fluorescent indicator stock solution; then, preparing a series of alcohol standard solutions with the alcoholic strength of 10-90%, adding the fluorescent indicator stock solution, photographing and recording fluorescent pictures of all samples by using a smart phone under the irradiation of an ultraviolet light source, and establishing a linear curve between the color channel ratio R / B and the alcoholic strength; and finally, adding the fluorescent indicator stock solution into a white spirit sample to be detected, obtaining a fluorescent picture, and calculating the alcoholic strength of the white spirit sample to be detected by utilizing the established linear curve. According to the method, the alcoholic strength is indirectly measured by using the chromaticity difference of the fluorescent indicator in samples with different alcoholic strength, and the method has the advantages of wide measurement range, small background interference, simplicity and convenience in detection operation and the like.

The invention relates to the field of high polymer materials, in particular to a preparation method and application of a double-layer film system material with a self-erasable surface microstructure, and the preparation method comprises the following steps: preparing an elastomer doped with a carbonyl-containing photoinitiator by taking thermally-crosslinkable polydimethylsiloxane as a base material; the method comprises the following steps: dissolving a polymerizable alpha-olefin monomer in an organic solvent to obtain a corresponding monomer solution; the method comprises the following steps: soaking an elastomer serving as a substrate in a monomer solution, and initiating a free radical reaction by utilizing ultraviolet exposure to generate a surface microstructure on the surface of the elastomer, thereby obtaining the double-layer film system material with the self-erasable surface microstructure. Some surface microstructures with uniqueness and practicability can be formed on the surface of the elastomer obtained after photochemical reaction, the defects of a traditional processing method are overcome, rapid construction of the polymer surface microstructure is achieved, and optical encryption materials can be prepared by matching with a photomask.

The invention discloses an athermalization wide-spectrum low-distortion wide-angle lens, and belongs to the technical field of imaging lenses. Comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, an aperture diaphragm, a seventh lens, an eighth lens, a ninth lens, a tenth lens and an eleventh lens which are sequentially arranged from an object side to an image side. Wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens form a front lens group, and the seventh lens, the eighth lens, the ninth lens, the tenth lens and the eleventh lens form a rear lens group. The aperture diaphragm is located on the front focal plane of the rear lens group, all the lenses are not glued, and the second lens and the fifth lens adopt single-face aspheric surfaces. Through reasonable distribution of the focal power of the light from the first lens to the eleventh lens, the design requirements of large view field, high resolution, wide spectrum, clear imaging in a wide temperature range and low distortion are met, and the application requirements of different fields can be met.

The invention relates to the technical field of phased array antennas, in particular to a one-dimensional sparse antenna array layout optimization method, which comprises the following steps: arranging candidate antenna units at a preset minimum unit interval based on the size of an array aperture, and selecting a plurality of antenna units from the candidate antenna units based on a binary vector z to form a one-dimensional sparse antenna array; calculating an excitation column vector wc corresponding to the antenna units based on the arranged antenna units and a preset beam scanning angle threshold; then preparing a matrix G, a matrix P and a matrix D; and establishing a mixed integer programming model for one-dimensional sparse antenna array layout optimization based on the matrix G, the matrix P, the matrix D, the binary vector z and the excitation column vector wc, and calculating to obtain an array layout with optimal beam scanning performance based on the mixed integer programming model. According to the one-dimensional sparse antenna array layout optimization method provided by the invention, the optimal one-dimensional sparse antenna array layout can be obtained, and the one-dimensional sparse antenna array layout optimization method has the optimal beam scanning performance and hardware realizability.

The utility model aims to provide a gas injection valve static flow test tool, which comprises a shell, a gas inlet and a gas outlet, and is characterized in that a cavity with one open end is formed in the shell, and the shell is provided with a gas inlet and a gas outlet which are communicated with the cavity; a to-be-tested valve seat, a to-be-tested valve plate, a gasket and a range limiting disc are sequentially arranged in a cavity of the shell from inside to outside; the gland is arranged at the open end of the shell and is used for pressing the range limiting disc, so that a part of the lower end surface of the range limiting disc is pressed with a part of the upper end surface of the valve seat to be tested; different lifts of the gas injection valve are simulated by adjusting the thickness of the gasket. The static flow measuring device can be used for measuring the static flow corresponding to each lift of the gas injection valve under a series of pressure differences.

This invention discloses a rocket-borne, large-spacing, ultra-wideband conformal phased array antenna, belonging to the field of phased array antenna technology. The antenna includes a conformal metallic carrier for the rocket body, a metasurface layer, an antenna layer, a parasitic layer, a metal ground plane, and a fixing structure. The antenna layer consists of periodically arranged dual-polarized orthogonal active antenna elements, with vertically polarized elements arranged linearly along the axial direction and horizontally polarized elements conformally bent along the cylindrical side of the rocket body. The parasitic layer consists of correspondingly arranged passive parasitic elements, arranged in an orthogonal grid alternating with the active antenna elements. Reverse current is excited by setting short-circuit strips to suppress harmful common-mode resonance in the H-plane. This invention's antenna achieves nine harmonic bandwidths in both the horizontal and vertical polarization directions, and uses a conformal approach with the rocket body to achieve an array spacing of 0.7~0.9λ. H Wide-angle scanning with no raster lobe at ±60° azimuth plane.

The invention provides a method for preparing aluminum dihydrogen phosphate and comprehensively recovering lithium salt from lithium phosphorus aluminum ore, and relates to the technical field of metal recovery, the method comprises the following steps: S1, ball-milling the lithium phosphorus aluminum ore; s2, carrying out nitric acid pressure leaching to obtain phosphorus lithium aluminum ore powder, and carrying out solid-liquid separation to obtain a leaching solution and leaching residues; s3, adjusting the pH value of the leachate to obtain an aluminum dihydrogen phosphate precipitate and a filtrate; s4, deeply removing impurities from the filtrate, adding Na2CO3, and precipitating to obtain Li2CO3 and lithium precipitation mother liquor; and S5, the lithium precipitation mother liquor is returned to the step S3 to be used for adjusting the pH of the leachate. According to the method, after the lithium phosphate aluminum ore is subjected to ball milling, a roasting section is omitted, the production cost is saved, valuable elements in the lithium phosphate aluminum ore are comprehensively recycled, other impurity ions are not introduced, only inert substances mainly containing silicon are contained in leaching residues, the environment pollution is reduced, meanwhile, the comprehensive economic value of the ore is improved, and the method has the advantages of being short in process route, low in cost and the like. The extraction rate of valuable elements is high, and the purity of aluminum dihydrogen phosphate and lithium carbonate is high.

The invention provides a semiconductor device, a manufacturing method thereof and an electronic device, and the method comprises the steps: providing a substrate, and forming a body region and a drift region in the substrate; forming a mask layer on the surface of the substrate; patterning the mask layer to expose a part of the drift region, and etching the substrate to form a groove in the drift region; a field oxide layer is formed, the groove is filled with the field oxide layer, and the top face of the field oxide layer is higher than the surface of the substrate; part of the mask layer is removed to enable the remaining mask layer to serve as a gate dielectric layer, the gate dielectric layer covers the surface of part of the body region and the surface of part of the drift region, and one side wall of the gate dielectric layer is in contact with the field oxide layer; and a gate electrode layer is formed, the gate electrode layer covers the gate dielectric layer and part of the top surface of the field oxide layer, and the gate dielectric layer and the gate electrode layer form a gate structure. According to the method, the mask layer is formed, and then the field oxide layer is formed in the groove by taking the mask layer as the mask, so that the beak effect can be effectively inhibited, the width of the beak region of the field oxide layer is reduced, and the device performance is improved.

The invention discloses a preparation method and application of a micron-hole TPU / rGO / carbon felt composite material, a carbon felt, high-elasticity TPU and reduced graphene oxide are adopted, an irregular porous structure film can be formed through TPU in a system with water as a non-solvent, the characteristic is combined with a carbon felt material, and the micron-hole TPU / rGO / carbon felt composite material is prepared through phase separation. The preparation method has the beneficial effects that the preparation method of the porous structure composite material has relatively high scientific significance and practical value, the sensing stability of the carbon felt material is improved on the premise of ensuring the electromagnetic shielding performance of the carbon felt material, and the preparation method has guiding significance on research and development of a flexible sensing material; the method is simple in process, easy to operate, low in equipment requirement, high in realizability and wide in application.