57results about How to "Improve output performance" patented technology

The utility model discloses a kind of micro high-output capacity's insensitive electric ignition tube, belong to the technical field of pyrotechnics, including shell (1), in the shell (1) from below to above sequentially provided with insulating sheet (8), electrostatic discharge ring (7) and electrode plug (6), the two pins (61) of the electrode plug (6) from the lower end of shell (1) stretch out shell (1) outside, the upper end surface of the electrode plug (6) is provided with bridge wire (5), the bridge wire (5) is communicated with two pins (61), the upper end surface of electrode plug (6) is provided with charge ring (4), in the charge ring (4) is provided with ignition powder (3), in the upper end surface of the ignition powder (3) is provided with cover sheet (2);The utility model makes the insensitive scheme that satisfies in GJB344A-2020 under the size frame as small as possible, simultaneously has enough big output capacity.

This application provides a highly integrated hydraulic power unit and its working method, relating to the field of hydraulic system technology. The unit includes a housing, a hydraulic pump, and a motor. The housing has an oil storage chamber, and the hydraulic pump is connected to the oil storage chamber and pumps hydraulic oil under the drive of the motor. The built-in oil storage chamber allows the oil supply process to occur entirely within the housing, eliminating the need for an external oil supply system, effectively reducing the overall size of the pump, and avoiding exposed oil supply lines. This application features multiple return oil channels around the motor, utilizing the hydraulic oil circulation process to cool the motor, enabling the installation of a high-power motor to increase power density. Furthermore, by implementing pressure-holding and shock-prevention measures, this application ensures that the pressure inside the oil tank remains positive, preventing instantaneous high-pressure shocks to the hydraulic pump. This allows the motor pump to continue pumping oil normally under harsh conditions, adapting to the shaking and swaying of mobile equipment during operation, and meeting the requirements for stable operation under adverse conditions.

The invention belongs to the technical field of flexible piezoelectric sensors, and relates to a carbon felt-hydrogel composite piezoelectric sensor and a preparation method thereof. The sensor comprises a piezoelectric sensing layer, a cross-scale dual-network hydrogel layer, an electrode layer, a leading-out wire and a packaging layer, the two cross-scale dual-network hydrogel layers are arranged on the upper side and the lower side of the piezoelectric sensing layer in a stacked mode to form a sandwich structure. The cross-scale dual-network hydrogel layer is an elastic hydrogel material formed by compounding a carbon fiber felt skeleton and a molecular-level network polymer, and the molecular-level network polymer penetrates through the interior and the surface of the carbon fiber felt skeleton and is formed by cross-linking and curing; the number of the electrode layers is two, and the two electrode layers are arranged on the outer sides of the two cross-scale dual-network hydrogel layers in a stacked mode respectively. The lead-out wire is electrically connected with the electrode layer; the packaging layer wraps the outer side of the electrode layer. According to the sensor, the mechanical property, the conductivity and the stability of the flexible piezoelectric sensor can be improved.

The application discloses a kind of gas diffusion layer and its preparation method and application, it is related to fuel cell technical field.The gas diffusion layer includes conductive substrate layer and hydrophobic filling layer, multiple channels are opened in conductive substrate layer and pass through its thickness, multiple channels include first channel and second channel different in aperture, and the pore wall surface of channel has hydrophilicity, hydrophobic filling layer is filled in channel and covers the surface of one side of conductive substrate layer, and hydrophobic filling layer has hydrophobicity, wherein, the inner wall surface of channel and the gap between hydrophobic filling layer filled in channel are formed.The present application utilizes the wettability gradient formed by hydrophilic pore wall and hydrophobic filling layer, combines interface gap and multi-level pore array structure, realizes the spatial complementation of liquid water directional discharge and reaction gas efficient permeation, can solve the performance attenuation problem caused by fuel cell cathode waterlogging under high current density, is conducive to improving water management capability and battery output performance.

A bipolar multi-mode magnetic field generator comprises a positive polarity circuit, a negative polarity circuit and a load coil; the positive polarity circuit comprises a positive polarity charging module, a positive polarity energy feedback circuit module and n positive polarity single-stage discharge modules; the negative polarity circuit comprises a negative polarity charging module, a negative polarity energy feedback circuit module and n negative polarity single-stage discharge modules. The bipolar pulse magnetic field can be outputted through the synergistic effect of the positive and negative polarity circuits. Meanwhile, the pulse source has an energy feedback circuit structure, and the system energy saving and the coil temperature rise reduction can be realized through the commutation switch. In addition, the pulse source has a modular structure, and the various output modes can be realized through the module switch timing control, thereby greatly improving the output performance of the pulse magnetic field generator on the basis of ensuring the reliable operation. The output mode can be flexibly selected, and the bipolar triangular wave and the bipolar exponential wave output modes can be realized.

This invention discloses a gas diffusion layer with multi-level mass transfer channels, its preparation method, and its application. The gas diffusion layer with multi-level mass transfer channels includes a substrate layer and a microporous layer on the substrate layer; wherein the microporous layer comprises carbon black, hollow porous carbon nanofibers, and optionally a hydrophobic binder. This invention uses hollow porous carbon nanofibers as a novel MPL carbon material to synergistically construct a gas diffusion layer with better water vapor management capabilities in conjunction with carbon black particles. The resulting gas diffusion layer exhibits excellent comprehensive performance; its hollow porous structure provides additional water transport channels, improving water vapor transport capacity, thereby enabling the assembled membrane electrode to have better output performance.

This utility model relates to the field of fluid circulation system technology, specifically disclosing an electronic oil pump with an internal circulation flow control structure. The electronic oil pump includes a pump body with a cavity. The cavity is divided into an outer circulation cavity and an inner circulation cavity by a partition. The outer circulation cavity supplies oil to external oil-using equipment. The inner circulation cavity houses a motor and a controller, and the partition has an oil hole. The electronic oil pump also includes a one-way control unit located in the inner circulation cavity and connected to the partition. The one-way control unit covers the oil hole, enabling automatic adjustment of the oil flow channel opening based on oil pressure. The oil flow channel is the oil flow path formed by the oil hole and the one-way control unit. This solves the problem in the prior art where electronic oil pumps struggle to dynamically adjust the internal circulation flow according to actual operating conditions.

The application provides a Mg3Sb2-based thermoelectric device and a preparation method thereof, and belongs to the technical field of thermoelectric materials. The Mg3Sb2-based thermoelectric material is made into a powder, and the Mg3Sb2-based thermoelectric device is prepared by using a 3D printing mode; the thermoelectric arm material structure is dense, and the conductivity is good; the thermoelectric device pattern can be flexibly designed according to the application scene by using the 3D printing mode, the application range is wide, and the thermoelectric device with high integration and high power density is easy to prepare; the thermoelectric device preparation process is simple and efficient by using the 3D printing mode, and the development of the batch production technology of the flexible micro thermoelectric device is promoted; the electrode material is connected by using the 3D printing mode, the contact resistance between the electrode material and the thermoelectric material is small, and the output performance of the thermoelectric device is improved.

The utility model discloses a stator punching sheet, a stator core, a motor and refrigeration equipment, and relates to the refrigeration equipment technology field, the stator punching sheet comprises a plurality of punching sheet units, the plurality of punching sheet units are sequentially connected end to end in an annular shape to form the stator punching sheet, each punching sheet unit comprises a stator yoke, stator teeth and tooth boots, and the tooth boots are arranged on the stator yoke. The stator teeth are connected to the stator yokes, the tooth boots are connected to the ends, deviating from the stator yokes, of the stator teeth, the stator teeth are located on the inner circumferential wall of the stator punching sheet, the distance between the outer walls of any two oppositely-arranged stator yokes is D1, the minimum distance between any two oppositely-arranged tooth boots is D2, and D1 is larger than D2. The width of the stator teeth is W1, and the width of the stator yoke is h0. According to the technical scheme provided by the utility model, the overload capacity of the motor is improved, the demagnetization performance of the motor is reduced, the output performance of the motor is improved, and the production and manufacturing cost of the stator punching sheet is reduced.

The embodiment of the invention discloses a voice generation method and device and electronic equipment, and the method comprises the steps: determining a to-be-converted text according to description information through a large language model, generating an intermediate phoneme sequence corresponding to the to-be-converted text and intermediate voice information corresponding to the intermediate phoneme sequence, analyzing the intermediate voice information by using an adversarial classifier and mutual information minimization to obtain a corresponding emotion feature vector and a tone feature vector, and determining a parameterized curve of a sentence head and / or a sentence tail of at least one sentence in the intermediate voice information based on at least one parameter of fundamental frequency, duration and energy, and finally, combining the parameterized curve, the intermediate phoneme sequence, the emotion feature vector and the timbre feature vector to generate target voice information. Therefore, the speech rhythm performance can be optimized, the separation of feature dimensions is realized, and the overall output effect of the synthesized speech is improved.

The present disclosure provides an audio processing method, a system chip and an audio processing system. The audio processing method comprises: obtaining audio playing data and writing the audio playing data into a first buffer; caching the audio playing data in the first buffer into a second buffer as audio back sampling data; outputting the audio playing data in the first buffer to the outside for playing; obtaining audio recording data collected during the playing and writing the audio recording data into a third buffer; and generating audio processing data based on the audio back sampling data in the second buffer and the audio recording data in the third buffer. The present disclosure back samples the output audio playing content through a DMA path without a hardware back sampling circuit, significantly reduces the hardware cost of the whole system, and makes the system more easily extended and integrated into various application scenarios.

The utility model discloses a kind of camera equipment, it is related to image acquisition equipment technical field.Cameras equipment includes support assembly and camera component.Cameras equipment includes base, yaw seat, yaw motor, pitch seat and pitch motor, yaw seat is rotatably installed on the top of base by yaw motor, pitch seat is installed at the end of yaw seat away from base, pitch motor is installed in pitch seat;Camera component includes protective shell, support frame, image processing chip, artificial intelligence chip, driving chip and first lens and second lens installed in support frame, support frame is installed in the inside of protective shell, protective shell is connected with the output end of pitch motor, first lens is electrically connected with image processing chip, second lens is electrically connected with artificial intelligence chip, driving chip is communicatively connected with yaw motor and pitch motor.Such, it can reduce the steering delay of cameras equipment, reduce the influence to image processing quality.

The application discloses a photovoltaic inverter and a photovoltaic inverter system. The photovoltaic inverter comprises a parallel output end, a total output end, a plurality of MPPT modules and a plurality of inverter power modules. The total output end and the parallel output end are electrically connected. The input end of the MPPT module is used for connecting a photovoltaic panel and outputting the voltage output by the photovoltaic panel after voltage boosting. The output ends of the plurality of inverter power modules are respectively electrically connected with the parallel output end. The inverter power module is used for outputting the voltage input by the input end to the parallel output end after inverting the voltage. The input end of the inverter power module is connected with the output end of at least one MPPT module, and the output end of the MPPT module is connected with the input end of only one inverter power module. Alternatively, the input ends of all the inverter power modules are respectively electrically connected with a bus, and the output ends of all the MPPT modules are respectively electrically connected with the bus. The application aims to improve the output capacity of the photovoltaic inverter.

This invention provides a triboelectric nanogenerator and its fabrication method. The generator operates in a vertical contact-separation mode, with a positive friction layer of PET film and a negative friction layer of PDMS composite film with a single layer of dense SiO₂ microspheres inserted on its surface. The fabrication process employs a two-step spin-coating method: first, a PDMS solution is spin-coated onto a substrate; then, a suspension of SiO₂ microspheres is spin-coated onto the uncured surface. After heating and curing, a composite negative friction layer is formed, which is then assembled with electrodes and a support structure. This invention significantly increases the triboelectric contact area and enhances charge trapping capability by constructing the SiO₂ microsphere insertion layer, thereby greatly improving output performance. Furthermore, the fabrication process is simple and low-cost, making it suitable for powering microelectronic devices and self-powered sensing applications.

This application proposes a motor matrix control method. The motor matrix includes multiple control trajectories, and each control trajectory includes multiple motors arranged sequentially on the motor matrix. The method includes: acquiring the multiple control trajectories on the motor matrix; determining the start time and end time of each control trajectory based on the multiple control trajectories; and controlling the multiple motors on each control trajectory to operate sequentially based on the start time and end time of each control trajectory. This application sets multiple control trajectories on the motor matrix and determines the start time and end time of each control trajectory by editing the control trajectories, thereby achieving continuous action output of the motors on each control trajectory, quickly realizing the multi-point vibration motor function mode, reducing the difficulty of function implementation, and improving the control effect.

This invention discloses a high-voltage LDMOS device, wherein a first field plate dielectric layer is provided on a first-doped substrate / first-doped epitaxial layer, and only in the second-doped LDMOS device region, the first field plate dielectric layer being a partial LOCOS structure; a first and second-doped drift region is provided below the first field plate dielectric layer in the first-doped substrate / first-doped epitaxial layer; a second and second-doped drift region is provided below the first and second-doped drift regions in the first-doped substrate / first-doped epitaxial layer; a second field plate dielectric layer is provided on the side of the first field plate dielectric layer near the channel, the second field plate dielectric layer being constructed by filling the dielectric layer using a shallow trench isolation process; the device drain is connected to the first and second-doped drift regions and the second and second-doped drift region and the second-doped heavily doped region through a second-doped well implantation. This invention reduces specific on-resistance while ensuring high breakdown voltage, improving process compatibility and device performance.

The present application relates to the technical field of bioelectrochemistry, and discloses a low-temperature bioelectrochemical system reinforcing method and device based on humin photo-thermal effect and electron-mediated synergistic effect. The system comprises an anode chamber and a cathode chamber separated by an ion exchange membrane, and the anode is a conductive electrode with a humin coating, the coating surface being directionally coupled with an external light source. Humin converts light energy into heat energy under the action of light, realizes local heating of the electrode interface, and its contained reversible redox group participates in the electron transfer process, thereby reducing the system polarization and internal resistance. Through the synergistic effect of photo-thermal effect and electron-mediated effect, the current density, output stability and energy conversion efficiency of the bioelectrochemical system under low-temperature conditions can be significantly improved. The present application has simple structure, low cost and is easy to implement, and is suitable for energy recovery and wastewater treatment under low-temperature environment.

A system and method for controlling the battery connection of an electric vehicle are disclosed. The system for controlling the battery connection of an electric vehicle includes: a battery cell comprising multiple battery packs; a power relay assembly (PRA) for electrically connecting or disconnecting the battery cell and an inverter, and for changing the connection configuration of the multiple battery packs to one of a series connection mode and a parallel connection mode via multiple relays; and a controller for switching the connection configuration to a series connection mode via the PRA in response to a driver's request to increase motor output, and for switching the connection configuration to a parallel connection mode via the PRA in response to a driver's request to increase driving range.

The invention relates to the field of generator power angle stability, and discloses an excitation synchronous generator power angle stability control method based on q-axis excitation, and the method comprises the following steps: S1, collecting a three-phase end voltage signal of a synchronous generator and d-axis and q-axis excitation current signals in real time; and S2, predicting future change of the power angle according to the change trend of the real-time power angle and load or short-circuit disturbance information to obtain a power angle prediction result, dividing power angle rising risks into different grades, and correcting by considering the influence of d-axis excitation on the power angle to determine an access strategy of q-axis excitation. According to the method, the real-time power angle can be accurately calculated and high-precision state information is provided for power angle prediction and excitation control by collecting the end voltage of the synchronous generator and d-axis and q-axis excitation current signals in real time and carrying out denoising, filtering and anomaly detection, so that the power angle control precision and the system stability are remarkably improved.

The present application belongs to the technical field of passive multi-physical field cooperative control, and particularly relates to a multi-field cooperative passive control device and method based on rigid geometric contour constraint natural air cavity phase change. The device comprises a first rigid member and a second rigid member, which form fixed, sliding or rotating cooperation, and are provided with a cooperation micro-gap of 0.02 mm to 0.2 mm therebetween; the rigid geometric air cavity coupling part is integrally formed on the cooperation surface and has a rigid geometric contour for constraining air cavity phase change evolution. Under external physical field excitation or relative motion, local negative pressure is formed in the micro-gap, natural air cavity periodic phase change is induced, the phase change path and pressure evolution are uniformly constrained by the rigid geometric contour, and the multi-field cooperative passive control of heat-flow-force-sound is realized in a single structure. The present application replaces the traditional discrete components with pure rigid structure, has no elastic element, no friction pair and no electric control unit, and is reliable in all working conditions.

The application discloses a kind of water pump external back pressure type dead head protection control methods, by establishing rotational speed starting threshold, rotational speed corresponding power threshold table or current threshold table, and install abnormal dead head determination rotational speed threshold table, in operation Actual rotational speed and actual average power or actual average current are monitored;When rotational speed is higher than threshold and power or current is lower than corresponding value, it is determined that dead head state is and executes breakthrough control, and the output capacity of water pump is improved by increasing current command.If actual rotational speed in the process does not exceed installation abnormal dead head determination rotational speed threshold, it is determined that external back pressure type dead head, and breakthrough control is continued until stable operation is restored.This method can avoid unnecessary shutdown and improve operation continuity.

This invention provides a rotor assembly and a motor having the same. The rotor assembly includes a rotor core, which comprises a core yoke and a plurality of core magnetic poles spaced circumferentially along the core yoke. Each core magnetic pole forms a magnetic slot with the core yoke, and the outer side of the magnetic slot communicates with the outside of the rotor core. A first baffle and a second baffle are respectively assembled at both ends of the rotor core. Each core magnetic pole has an installation channel, and each fixing member passes through the installation channel, with both ends of each fixing member connected to the first baffle and the second baffle, respectively. According to this invention, by removing the magnetic isolation bridge between poles, and by using the fixing members passing through the installation channels on each core magnetic pole and connecting both ends of each fixing member to the two baffles, a reliable fixation of each core magnetic pole can be achieved, resulting in better overall structural strength of the rotor assembly and enabling it to withstand high-speed operation.

The invention discloses a gas supply assembly for an air battery, the air battery and a rust battery. The gas supply assembly comprises a gas chamber and a gas diffusion piece, and the gas chamber comprises a first path direction and a second path direction for oxygen-containing gas to circulate; the gas diffusion piece is arranged in the direction of the second path and can lead out at least part of gas in the gas chamber; a plurality of air hole structures with at least two ventilation resistances are arranged on the gas diffusion piece and are sequentially distributed in the direction of the first path; the service life of the air positive electrode can be prolonged, the output performance is relatively stable, and the air positive electrode is particularly suitable for a large-size air battery.

The invention discloses an engine control method and device, equipment and a storage medium, and belongs to the technical field of vehicle control. The method comprises the following steps: acquiring a first characteristic signal; acquiring a first phase angle under the condition that the first characteristic signal does not meet a first specified condition; acquiring a second phase angle under the condition that the first characteristic signal meets a first specified condition; and controlling the engine according to the steady-state phase angle or the dynamic phase angle, wherein the first phase angle is different from the second phase angle. Through differential phase control based on the driving intention, the engine can be kept in the optimal operation state under different working conditions.

The invention discloses a flexible micro electrical stimulator capable of being wound and adhered to peripheral nerve tracts and a preparation method and application thereof, and relates to the technical field of crossing of neural engineering, bioelectronics and medical instruments. A first insulation layer, a first friction electrode layer, a middle isolation layer, a second friction electrode layer and a second insulation layer are assembled layer by layer; the first insulation layer and the second insulation layer are self-adhesion polyurethane layers, and the first friction electrode layer, the middle isolation layer and the second friction electrode layer are packaged in the first insulation layer and the second insulation layer; the first friction electrode layer is a gold foil, and the surface of the gold foil is electroplated with a PEDOT: PSS plating layer formed by a 3, 4-ethylenedioxythiophene monomer and polystyrene sulfonate; the second friction electrode layer is gold foil or aluminum foil. According to the invention, macro-scale contact-separation type friction power generation is realized through ultrasonic driving, and the device has good output performance, long-term stability and nerve stimulation effect.

This invention relates to a negative electrode for a secondary battery and a secondary battery including the same. The negative electrode for the secondary battery comprises: a current collector; and a negative electrode active material layer formed on the current collector, containing a negative electrode active material, satisfying the following relation 1: [Relation 1] D < 1.9·10 ‑3 In Equation 1, D is the diffusion coefficient of lithium ions within the negative electrode, derived mathematically as follows: D = σ 2 ·τ d ‑γ σ is the thickness (cm) of the negative electrode active material layer, and τ d Here, γ is the diffusion time (s), and γ is the dispersion parameter, satisfying 0.8 ≤ γ ≤ 0.95. The electrode of this invention forms fine and dense pores, thereby reducing diffusion resistance within the electrode and thus enabling a battery with high output performance.

The application provides a preparation method of an agricultural nanometer friction power generation electrode interface modification material, and belongs to the technical field of nanometer material preparation, and comprises the following steps: step 1, preparation of a nanometer titanium dioxide sol; step 2, preparation of a polypyrrole / titanium dioxide composite sol; step 3, pretreatment of an agricultural-grade red copper foil electrode; step 4, spraying and coating of the composite sol; and step 5, solidification and shaping to form a nanometer modification layer. The modification material prepared by the application can effectively inhibit solid-liquid interface polarization after coating, significantly improve the charge storage and transmission efficiency of the electrode, and optimize the output performance of a power generation device. The modification layer prepared by the application has strong adhesion with the copper foil, is resistant to high temperature and high humidity in agricultural environments, does not fall off or corrode, improves the electrode adaptability and service life, and guarantees stable power generation output. The application adopts a sol-gel method for preparation, discards traditional complex modification processes, has a simple process, raw materials are easy to obtain, and the cost is low, and is suitable for large-scale production and agricultural practical application.

The invention discloses a PbTe-based thermoelectric material Fe-Cr-based multicomponent alloy barrier layer and a preparation method and application thereof, and the method comprises the following steps: S1, weighing raw materials according to a chemical ratio, obtaining a corresponding cast ingot through a smelting process and annealing, and crushing and grinding the cast ingot into fine powder to obtain Pb-Te powder and Sn-Te powder; s2, raw materials are weighed according to the chemical formula, an alloying method is adopted for preparing a Fe-Cr-based multi-element alloy block, an alloy ingot is obtained through a smelting technology, then the alloy ingot is smashed and ground into fine powder, and Fe-Cr-based multi-element alloy powder is obtained; and S3, the PbTe powder, the SnTe powder and the Fe-Cr-based multi-element alloy powder are sequentially filled into a graphite mold, a compact Pb-Te / Sn-Te / Fe-Cr-based multi-element alloy composite block is obtained through spark plasma sintering, and preparation of the Fe-Cr-based multi-element alloy barrier layer is completed. The barrier layer is good in thermal expansion matching and high in interface stability.

The invention discloses a composite membrane for a high-temperature proton exchange membrane fuel cell as well as a preparation method and application of the composite membrane. According to the composite membrane, polybenzimidazole (PBI) is used as a matrix, chloromethylated polysulfone (CMPSF) is introduced as a covalent cross-linking agent and reacts with imidazole groups in the PBI to form a three-dimensional covalent cross-linked network, and the mechanical strength and dimensional stability of the membrane are remarkably improved; meanwhile, a nitrogen-rich ionic polymer (NIP) synthesized by a specific precursor is introduced, and rich basic nitrogen sites of the NIP can form strong hydrogen bond interaction with phosphoric acid, so that the phosphoric acid adsorption and retention capability of the membrane is greatly enhanced, and additional proton jump sites are provided. Through the synergistic effect, the proton conductivity of the composite membrane exceeds 160 mS cm <-1 >, the tensile strength exceeds 10 MPa and the peak power density reaches 1000 mW cm <-2 > magnitude under the conditions of 160 DEG C and no water, and the composite membrane has excellent long-term stability. According to the invention, the contradiction between the mechanical property and proton conductivity of the traditional phosphoric acid doped PBI membrane is effectively solved, and a reliable electrolyte material is provided for a high-performance and long-life high-temperature proton exchange membrane fuel cell.

The invention discloses a wind and rain energy collaborative collection friction nanometer generator, which comprises a wind energy collection unit and a raindrop energy collection unit, and is characterized in that the wind energy collection unit comprises wind cups, a rotating shaft, a sleeve, end covers, a scraper blade, an inertia body, a film and a metal electrode, the sleeve and the end covers at the two ends of the sleeve form a sealed cavity, and the wind cups are arranged at the two sections of the rotating shaft; the rotating shaft is rotationally connected with the end cover, a metal electrode is arranged on the inner side of the sleeve, a film is arranged on the inner side of the metal electrode, the scraper is connected with the rotating shaft and divides a cavity defined by the film and the rotating shaft into a plurality of cavities, and an inertia body is arranged in at least one cavity; a raindrop energy collecting unit is arranged on the outer surface of the sleeve. Efficient and stable collaborative collection of wind energy and raindrop energy is achieved, the wind energy collection unit and the raindrop energy collection unit can work independently and can also achieve multi-source environment energy collection, and the output performance and durability are remarkably improved; finally, the open-circuit voltage of the device reaches 700V, and the peak power reaches 6.1 mW.