61results about How to "Optimize the transmission path" patented technology

The invention relates to the field of integrated optical fiber microscopic endoscopy, in particular to an all-optical-fiber light beam modulation and collection system based on double super lenses and a design method of the all-optical-fiber light beam modulation and collection system. The system comprises a single-mode optical fiber, a coreless optical fiber for beam expansion and two super lenses (a super lens 1 and a super lens 2) with different functions. The super lens 1 is arranged on the end face of the fiber core of the single-mode optical fiber and focuses output exciting light to form extremely small waist spots, and the divergence angle of light beams is increased. The super lens 2 is arranged on the end face of the coreless optical fiber beam expanding area and used for refocusing the exciting light and focusing the collected fluorescence to the focus position of the super lens 1 at the same time, and the fluorescence is incident to the fiber core in parallel through the super lens 1. According to the invention, a double-super-lens system based on a high numerical aperture (NA) is fully utilized, wavefront modulation is carried out, the length of a beam expanding area is adjusted, and the loss of fluorescence in the beam expanding area is reduced, so that the collection efficiency of the fluorescence is remarkably improved, and an innovative solution is provided for the design of a super-lens-based optical fiber optical system.

The invention relates to the technical field of batteries, in particular to a positive electrode material and a preparation method and application thereof. The positive electrode material comprises a core layer and a shell layer coating the surface of the core layer, the core layer comprises a high-nickel multi-metal oxide and a doping element Q, and the Q comprises at least one of Al, B, Nb, La, Sr, Sb and Mo; the shell layer comprises a nickel-containing multi-metal oxide and a doping element M, the element M comprises the element Q and a doping element D, and the doping element D is selected from at least one of B, Sb, Nb, W, Zr, Ta and Mo; the element Q is different from the element D; the element Q is uniformly distributed in the core layer and the shell layer; the doping element D is distributed in a radial concentration decreasing manner from the surface to the interior of the shell layer, and the interior of the positive electrode material is of a radial structure. The positive electrode material provided by the invention has low 003 crystal face grain size and high microstrain, can realize structure optimization and core-shell concentration difference maintenance at the same time, and improves the electrochemical performance of the positive electrode material.

The invention discloses a preparation method of a high-entropy phosphide nanotube, which successfully prepares a nanotube phosphide with a high-entropy structure by adopting a hydrogen bond organic framework (HOF)-metal organic framework (MOF) template conversion method. In the preparation process of the material, a core-shell structure (HOF (MOF)) is firstly formed, the core gradually disappears through a diffusion mechanism, and finally, the material is converted into a hollow nanotube structure which is uniform and controllable in size. According to the hollow structure, the specific surface area is remarkably increased, more active sites are provided, the transmission path of reactant molecules is optimized, and the electro-catalytic performance is greatly improved. Besides, the overall tubular morphology of the material is uniform, the size is controllable, and compared with a traditional granular material, the specific surface area is remarkably increased, so that more reaction sites are exposed in the external environment, and the catalytic efficiency and the reaction rate of the material in an electro-catalytic reaction are greatly improved.

A preparation method of a magnetic metal nanoparticle-loaded nitrogen-doped wood carbon aerogel wave-absorbing material comprises the following steps: step 1, delignification is performed on cut natural wood, and then freeze drying is performed to obtain delignified wood aerogel; 2, the delignification wood aerogel and a metal adenine solution are subjected to a reaction in a reaction kettle, then freeze drying is conducted, and wood aerogel loaded with a metal adenine complex is obtained; 3, the wood aerogel loaded with the metal adenine complex is subjected to high-temperature carbonization treatment in inert gas, and the nitrogen-doped wood carbon aerogel wave-absorbing material loaded with the magnetic metal nanoparticles is obtained. According to the method, natural wood with a directional multilevel pore channel structure is used as a raw material, and a metal-organic complex grows in situ in a pore channel of the wood through solvothermal reaction. The invention aims to realize uniform dispersion and loading of magnetic nanoparticles in a wood carbon-based material so as to solve the problems of non-uniform structure, complex processing procedures and the like in the preparation process of the wave-absorbing material.

The invention discloses a bio-based recoverable high-thermal-conductivity dynamic ordered network composite material and a preparation method thereof, and is characterized in that the material takes a bio-based multifunctional epoxy system and a carboxylic acid compound containing disulfide bonds as reaction monomers, and the reaction monomers are reacted under the conditions of high temperature and metal salt catalyzed epoxy-carboxylic acid esterification reaction to obtain the bio-based recoverable high-thermal-conductivity dynamic ordered network composite material. A dynamic ordered network structure simultaneously containing disulfide bonds and beta-hydroxyl ester bonds is constructed, and the dynamic ordered network can be used as a springboard for phonon transmission, serves as an efficient'thermal bridge ', and plays a role similar to an ordered'crystal domain', so that higher heat-conducting property is shown when heat-conducting filler is not introduced, high flexibility and intrinsic heat conduction are realized, and the service life of the material is prolonged. And the material is endowed with reprocessing and recycling characteristics. Due to the synergistic existence of carboxyl, hydroxyl generated by epoxy ring opening and metal coordination in the system, and in combination with electrostatic interaction, Van der Waals force and hydrophobic interaction, the material has the adhesion characteristic suitable for a thermal interface at the same time.

The invention provides a silicon-based negative electrode material with a cage-shaped structure, a preparation method of the silicon-based negative electrode material, a solid-state battery and electric equipment, and relates to the field of batteries. The silicon-based negative electrode material with the cage-shaped structure comprises an inner core, a polymer coating layer and a carbon coating layer, the polymer coating layer coats the inner core, and the carbon coating layer coats the polymer coating layer; the core comprises silicon particles, the polymer coating layer comprises a polymer, the polymer comprises one or more repetitive units, the repetitive units comprise siloxane units, and the repetitive units are crosslinked to form a cage-shaped structure. According to the silicon-based negative electrode material with the cage-shaped structure provided by the invention, by constructing the cage-shaped structure coating the surfaces of the silicon particles, structural damage caused by silicon volume change can be effectively inhibited, the contact stability between an electrode and a solid electrolyte is enhanced, and the interface impedance is reduced, so that the cycle performance and the energy density of a solid-state battery are remarkably improved.

The invention discloses a double-reflection grating coupler for spatial optical coupling, which comprises a substrate layer, an oxide lower cladding layer and an optical waveguide layer which are sequentially stacked from bottom to top, a first light reflection structure is arranged between the substrate layer and the oxide lower cladding layer, and a supporting polar plate is arranged above the optical waveguide layer. A second light reflection structure is arranged between the supporting polar plate and the optical waveguide layer; the optical waveguide layer comprises a left optical waveguide, a grating area and a right optical waveguide which are sequentially arranged from one side of the substrate layer to the other opposite side, and space light enters the grating area, is reflected by the first light reflection structure and the second light reflection structure, reflects an uncoupled part back to the grating area for coupling, and is output through the right optical waveguide. According to the invention, the problem of low coupling efficiency in coupling of the spatial light and the optical waveguide in the turbulent channel in the prior art is solved.

The invention discloses a transition metal sulfide heterojunction with wide spectral response as well as a preparation method and application of the transition metal sulfide heterojunction. The transition metal sulfide heterojunction is prepared from the following raw materials: Na2WO4 (1 to 3 mmol), NaCl (2 to 4 mmol), ZnCl2 (0.5 to 1 mmol), InCl3 (1 to 2 mmol), C2H5NS (2 to 4 mmol) and glycerol (8 to 12 mL). The preparation method comprises the following steps: by taking Na2WO4 and NaCl as reactants and water as a solvent, synthesizing a WO3 nanorod by adopting a solvothermal method; the preparation method comprises the following steps: synthesizing WO3 nanorod solid powder, putting the synthesized WO3 nanorod solid powder into a high-temperature reaction furnace filled with argon-hydrogen mixed gas to obtain an oxygen vacancy-containing WO3 (WOx) nanorod, dissolving ZnCl2, InCl3 and C2H5NS into a mixed solvent of water and glycerol, adding the WOx nanorod into the solution, and growing a ZnIn2S4 nanosheet on the surface of the WOx nanorod in situ by using an oil bath method to finally obtain the transition metal sulfide heterojunction. The prepared heterojunction has obvious one-dimensional / two-dimensional structural characteristics, and due to the photo-thermal effect induced by oxygen vacancies and the synergistic effect of providing additional photo-generated charge transfer channels, the prepared transition metal sulfide heterojunction structure shows efficient performance of producing hydrogen by photo-thermal catalytic decomposition of water.

This application provides an electric motor, an electric propulsion device, and an aircraft. The electric motor includes: a stator having a cavity; a rotor rotatably connected to the stator via a shaft; and the rotor being insulated from the stator; a conductive component disposed within the cavity, one end of the conductive component being conductively connected to the shaft, and the other end extending to the outside of the electric motor. The electric motor of this application, by incorporating the conductive component, creates a complete low-impedance electrical path between the shaft and the conductive component, allowing current that might be input into the electric motor via the rotor hub to be output to the outside of the electric motor, thus improving the electrical protection performance of the electric motor.

The invention relates to the technical field of oxygen reduction catalysts, in particular to a transition metal-based triatomic oxygen reduction catalyst and a preparation method and application thereof. The invention relates to a preparation method of a transition metal-based triatomic oxygen reduction catalyst. The preparation method comprises the following steps: dispersing carbon nanotubes in a solvent to obtain a dispersion liquid; adding transition metal acetate, urea and 4, 4 '-dihydroxy [1, 1'-biphenyl]-3, 3 ', 5, 5'-tetracarboxaldehyde into the dispersion liquid, performing ultrasonic treatment to obtain mixed liquid, and then performing heating reaction in an inert atmosphere; and after the reaction is finished, naturally cooling to room temperature, filtering, washing and drying to obtain the transition metal-based triatomic oxygen reduction catalyst. The catalyst designed by the invention not only has an efficient catalytic active site, but also remarkably improves the material transmission efficiency and enhances the utilization rate of a catalytic active center by optimizing the structure of a composite material, so that the synergistic enhancement of the electro-catalytic performance is realized.

The invention discloses a composite modification film, a lithium metal negative electrode and a preparation method of the lithium metal negative electrode. The composite modified film comprises an organic polymer solid electrolyte, an inorganic solid electrolyte and a film-forming agent, and the mass ratio of the organic polymer solid electrolyte to the inorganic solid electrolyte to the film-forming agent is (10%-35%): (10%-35%): (30%-80%). The composite modified film effectively buffers cyclic stress, prevents early mechanical failure of the protective layer, and realizes mechanical durability of the interface protective layer; the immobilized film-forming agent can be slowly released, so that the continuous and stable repair of SEI is realized, the dynamic repair capability of the whole life cycle is provided, and the efficient cycle life of the battery is greatly prolonged; and the electrolyte does not need to depend on a high-concentration liquid additive, dramatic change of electrolyte components in circulation is avoided, the overall chemical stability of the battery is improved, and the stability of an electrolyte system is guaranteed.

The invention discloses a nickel-based catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: ultrasonically cleaning foamed nickel with hydrochloric acid, ethanol and deionized water, and drying for later use; putting the pretreated foamed nickel into seawater containing single transition metal salt, and oscillating in a constant-temperature oscillator; and taking out the material from the seawater after oscillation, and washing to obtain the nickel-based catalytic material. Foamed nickel serves as a substrate material, metal nickel is corroded into nickel ions by adopting a seawater corrosion technology, meanwhile, other transition metals are added, oxygen and carbon dioxide in air are dissolved in seawater in an oscillation mode to participate in a reaction, hydroxyl ions and carbonate ions are formed and combined with the metal ions, and the metal ions are formed. Layered bimetallic basic carbonate uniformly grows on the surface of the substrate to provide active sites, so that the nickel-based catalytic material has very high catalytic activity and stability.

The invention relates to the technical field of battery diaphragms, and provides a multifunctional composite coating diaphragm and a preparation method thereof.The multifunctional composite coating diaphragm sequentially comprises a polyolefin base membrane, a ceramic slurry coating and an electrostatic spinning layer from top to bottom; the raw material of the electrostatic spinning layer comprises a polymer; the polymer comprises aramid fiber and polymethyl methacrylate in a mass ratio of 5: (1-9). According to the technical scheme, the problems of single coating, poor heat resistance and low ionic conductivity of the battery diaphragm in the prior art are solved.

The utility model provides an ultra-radio frequency anti-aging transdermal collagen light beauty instrument. The ultra-radio-frequency anti-aging transdermal collagen light beauty instrument comprises a shell, and a skin contact area is formed at one end of the shell; the optical assembly comprises a halogen lamp tube, a light filtering part and a light transmitting part which are sequentially arranged at intervals, the halogen lamp tube and the light filtering part are arranged in the shell, at least part of the light transmitting part is exposed out of the skin contact area, and the light filtering part allows near-infrared light emitted by the halogen lamp tube to pass through and prevents non-near-infrared light emitted by the halogen lamp tube from passing through; the light transmitting piece is used for enabling near-infrared light formed after filtering of the light filtering piece to irradiate out of the shell, the halogen lamp tube and the light filtering piece are arranged in parallel, and the distance between the halogen lamp tube and the light filtering piece is not smaller than 2 mm; the controller is arranged in the shell, and the halogen lamp tube is electrically connected with the controller so as to control the halogen lamp tube to work. According to the technical scheme, the problems that in the prior art, a beautifying instrument is low in use safety and poor in beautifying effect are solved.

The invention relates to the technical field of image transmission, in particular to an energy consumption self-adaptive management method and system of a wireless image transmission module. Comprising the steps of obtaining operation data of at least one node, and analyzing a network load to adjust interaction frequency configuration; load balancing parameters are determined according to interaction frequency configuration, transmission task priorities are dynamically adjusted, node energy consumption data are collected, and resource waste points are checked to update an energy consumption distribution scheme; predicting the traffic of a transmission path according to an energy consumption distribution scheme, optimizing path allocation and reallocating resources when the traffic is greater than a set value, and updating node state shared data; and finally, the network operation state is calibrated according to the node state shared data, and energy consumption optimization configuration is obtained, so that energy consumption is reduced, and network efficiency is improved. According to the invention, the problem that the energy consumption management of the wireless image transmission network is difficult to finely regulate and control along with the load change is solved, and the self-adaptive energy conservation and stable transmission of the distributed image transmission module are realized.

The utility model belongs to the field of laser cutting technology, concretely relates to a kind of high -efficient mobile laser cutting device.It includes bottom plate, first support frame, second support frame, fixed base, clamping assembly, propulsion assembly, cutting assembly and workstation: first support frame and second support frame are vertically installed on bottom plate;Workstation is horizontally erected between first support frame and second support frame;The upper portion and lower portion of first support frame are respectively fixed with first lead screw sliding rail and second lead screw sliding rail, and the other end of first lead screw sliding rail and second lead screw sliding rail is respectively fixed in the upper portion and lower portion of second support frame;Clamping assembly is slidably connected with first lead screw sliding rail and second lead screw sliding rail by sliding block;Cutting assembly is installed on the lower surface of first lead screw sliding rail;Propulsion assembly is installed on one side of workstation.The utility model can effectively suppress the vibration in cutting process, ensure high-precision cutting quality, and avoid the eccentric load problem easily produced by single-track structure.

The invention relates to the technical field of composite current collector production, in particular to an adapter welding method of a composite current collector. According to the invention, the outer side of the blank area of the composite current collector is folded inwards to form the folded B-surface metal layer, so that the folded blank area is obtained; and covering the turned blank area with a transfer metal foil, and welding in a pole piece welding area, so that the A-surface metal layer of the composite current collector, the turned B-surface metal layer and the transfer metal foil are welded together to obtain the composite current collector after transfer welding. According to the invention, the A / B surface metal layer of the composite current collector is conducted only by adopting the single-surface metal foil, so that the waste of the foil is reduced, and meanwhile, the resistance performance is better than that of a transfer welding scheme without using the metal foil.

The invention discloses a novel heterojunction and perovskite laminated cell structure and a preparation method thereof, and belongs to the technical field of solar cells. The cell comprises a perovskite cell unit and a heterojunction cell unit, and the heterojunction cell unit is constructed on an N-type texturing silicon wafer substrate and comprises an amorphous silicon layer, a doping layer and a unique composite film layer; a functional layer and a transparent electrode layer are sequentially stacked on the perovskite unit to form an efficient light absorption and conversion structure. Laser grooving lines P1-P4 penetrate through different film layers, the boundary of a cell unit is defined, and a vertical conduction path is established: the P1 groove exposes a heterojunction cell substrate to define unit segmentation, the P2 groove segments an electrode to prevent transverse electric leakage, the P3 groove realizes interlayer interconnection of perovskite and heterojunction, and the P4 groove defines perovskite cell unit segmentation. And the composite film layer adopts a TCO and metal layer sandwich structure, so that the interface contact resistance is remarkably reduced while the high light transmission is maintained. According to the invention, the electron transmission path is optimized, and the cell conversion efficiency and stability are significantly improved.

The invention discloses a Pt nano-catalyst based on TS-1 molecular sieve strong metal-carrier interaction and application thereof.According to the Pt nano-catalyst based on TS-1 molecular sieve strong metal-carrier interaction and the application thereof, a two-step strategy of first oxidation and second thermal reduction is adopted, firstly, Pt and a carrier TS-1 form strong interaction, agglomeration of precious metal particles is hindered, and therefore the particle size of the precious metal catalyst is reduced, and the precious metal catalyst with the smaller particle size is prepared; the catalytic reaction activity of the noble metal catalyst is improved. In the subsequent reduction process, high-valence Pt is converted into a metal state, a Pt0 (Pt delta +) / PtOx interface structure is formed, and a new channel is provided for interface electron transfer and catalytic activity. Meanwhile, TS-1 can be induced to generate a large number of oxygen vacancies, the Lewis acid site of TS-1 is enhanced, and the strong interaction between Pt and TS-1 is enhanced. As a lithium-sulfur battery diaphragm coating material, conversion of polysulfide can be more effectively accelerated, the shuttle effect is inhibited, and the electrochemical performance of a lithium-sulfur battery is improved.

The invention relates to the technical field of chip optimization, in particular to a chip performance optimization method and device, electronic equipment and a storage medium, and the method comprises the steps: planning input data and weight data through employing a three-dimensional MAC array additionally arranged in a target chip, and obtaining a distribution scheme; according to the distribution scheme and the trapezoidal shift register array, carrying out time-sharing loading on the input data, and shifting the input data subjected to time-sharing loading to obtain an input data stream; and according to the input data stream and the weight data, performing convolution calculation on each multiplier-adder unit in the three-dimensional MAC array in sequence to obtain an optimized pipeline calculation result of the target chip. According to the invention, the computing architecture based on the three-dimensional MAC array is optimized, the proportion of read-write operation is reduced, and the overall computing efficiency of the chip is improved; by optimizing the data processing flow, it is ensured that the calculation process can be continuously carried out, the proportion of calculation duration is increased, and time delay caused by read-write operation is shortened.

The invention discloses a halide solid electrolyte with electrochemical activity and a preparation method and application thereof, the solid electrolyte is a zirconium-doped ferric lithium chloride solid electrolyte, the chemical general formula of the solid electrolyte is LiFe1-4x / 3MxCl4, M is a metal element with the valence state higher than + 3, 0 lt; xlt; 1. According to the halide solid-state electrolyte with the electrochemical activity, the ionic conductivity order of magnitude is improved, the room-temperature ionic conductivity is improved to 10 <-3 > S / cm from 10 <-6 > S / cm by three orders of magnitude, so that the material is changed from'unavailability 'to'high performance', and the application requirement of an all-solid-state battery is met.

The application relates to a diaphragm and an electrochemical device and an electronic device comprising the same, and belongs to the technical field of electrochemical energy storage. The diaphragm comprises a porous substrate and a porous coating on at least one side surface of the porous substrate, and the porous coating comprises fibrous fillers; the fibrous fillers comprise a core layer and a shell layer on the surface of the core layer, the core layer comprises at least one of Mxene and an oxide thereof, MOFs and an oxide thereof, black phosphorus and an oxide thereof, and carbon; the shell layer comprises at least one of silicon dioxide and a lithiumophilic metal oxide; the mass ratio of the shell layer to the core layer of the fibrous fillers is M; the thermal conductivity of the diaphragm is lambda W / (m.K), the specific heat capacity is Cp J / (g.K), and the density is rho g / cm 3 ; the following relationships are satisfied: 0.010 <= (M*lambda) / (2Cp) <= 0.017 and 0.4 <= lambda / (rho*Cp) <= 1.0. The diaphragm can improve the safety performance, cycle life and rate performance of a battery.

The invention discloses a negative electrode material and a preparation method and application thereof. The preparation method of the negative electrode material comprises the following steps: carbonizing a mixture containing graphite and a coating agent, wherein the coating agent comprises a molecular sieve and liquid phase pitch; the mass ratio of the molecular sieve to the liquid phase pitch is 5-25%; the mass ratio of the coating agent to the graphite is 1%-15%. The negative electrode material comprises a graphite matrix and a composite coating layer coating the surface of the graphite matrix, the composite coating layer comprises amorphous carbon and a molecular sieve skeleton, and the composite coating layer contains pores; wherein the mass ratio of the composite coating layer to the graphite matrix is 1%-15%. The preparation method can optimize the pore size and other parameters of the obtained negative electrode material and the comprehensive performance of the obtained battery, and also has the advantages of low cost, simple process, easy large-scale production and the like.

The invention discloses a coated high-nickel material and a preparation method and application thereof, the coated high-nickel material comprises a high-nickel material and a coating layer coating the surface of the high-nickel material, and the coating layer is composed of an NASICON fast ion conductor and a metal boride. The coated high-nickel material has high surface ion / electron conductivity, is easy to dissipate heat and has good compatibility with electrolyte.

This invention provides a system for analyzing the particle size distribution and chemical composition of neutral clusters smaller than 3 nanometers. This invention further provides a method for analyzing the particle size distribution and chemical composition of neutral clusters smaller than 3 nanometers. The system and method provided by this invention, based on central sample flow sampling, achieves efficient sampling of nanoparticles. Utilizing the high charging efficiency of a unipolar charging device for nanoparticles, the nanoparticles are charged and efficiently transported to the inlet of a nanoparticle size sieving device. Through a special aerodynamic design, the nanoparticles are efficiently transported through the electric field between the electrode plates to the particle number concentration and chemical composition detectors, demonstrating excellent application prospects.

The invention relates to the technical field of instant messaging, and discloses an intelligent block chain point-to-point instant encryption communication method and system, and the method comprises the steps: obtaining all devices, and recording the devices as a first device, a second device,..., and an Nth device, acquiring the signal-to-noise ratio and the required time length of the signal transmitted between any two devices through a signal-to-noise ratio test strategy and a transmission time length test strategy; when a user sends a signal to target equipment, if the target equipment does not receive the signal, selecting a signal transmission path according to a signal transmission path selection strategy; if the signal is received, judging whether the signal meets the standard or not according to a first judgment strategy, if yes, directly sending the signal, and if not, selecting a signal transmission path and dynamically adjusting the signal in the path; the system comprises a signal transmitting module, a signal receiving module, a control module, a signal-to-noise ratio testing module and a transmission duration testing module.

The invention relates to the technical field of optical communication, in particular to a vehicle-mounted optical module fiber coiling structure and a use method thereof, and the structure comprises a PCB, a fiber coiling assembly and a housing. The fiber coiling assembly is fixedly arranged above the PCB, and the PCB and the fiber coiling assembly are placed in the shell; the fiber coiling assembly comprises a fiber coiling frame and a mounting panel, the fiber coiling frame is fixedly connected with the PCB, a plurality of photoelectric hybrid connectors are inserted into the mounting panel, and tail fibers of the photoelectric hybrid connectors are coiled into the fiber coiling frame; a plurality of optical devices are arranged on the PCB, the fiber coiling frame comprises an upper platform, a lower platform and a connecting surface, the two ends of the connecting surface are fixedly connected with the upper platform and the lower platform respectively, and the upper platform is located above the optical devices. According to the invention, the fiber coiling structure and the PCB are stacked, so that the occupation of the fiber coiling structure and the PCB on the space in the vehicle is reduced, and the signal transmission path is optimized, thereby overcoming the problems of signal transmission and integrity and the problems of cost and space in the existing separated arrangement.

The invention discloses a stacked back-illuminated anti-radiation pixel reinforcing structure and a preparation method thereof. The preparation method comprises the following steps: taking a semiconductor substrate with an epitaxial layer; an ST I structure, an ST I isolation well injection region and an N-type PD injection region are formed on the epitaxial layer, the ST I isolation well injection region is located on the periphery of the N-type PD injection region, and the ST I structure is located in the ST I isolation well injection region; forming a buried trench epitaxial region above the middle region of the epitaxial layer; forming a P-type clamping layer injection region around the buried trench epitaxial region on the epitaxial layer; forming a transmission tube channel isolation injection region on the outer side of the buried channel epitaxial region through injection; forming an FD region above the buried trench epitaxial region; forming a gate stack structure and a gate above the epitaxial layer; an FD contact structure is formed over the FD region. According to the invention, the buried channel structure is introduced into the transmission tube channel, and the electron barrier formed in the isolation injection region of the transmission tube channel is combined, so that the separation of the photoelectron transmission channel and the gate oxide layer is realized, and the anti-radiation capability of the pixel is improved.

The invention relates to a catalyst layer with a gradient pore structure and a preparation method and application thereof, and the preparation method comprises the following steps: by taking polyvinyl alcohol as a pore forming agent, forming a first catalyst layer on a proton exchange membrane by using a first catalyst slurry layer; taking polyvinyl alcohol and calcium carbonate particles as pore-forming agents, and forming a second catalyst layer on the first catalyst layer by using the second catalyst slurry layer; and by taking calcium carbonate particles as a pore forming agent, forming a third catalyst layer on the second catalyst layer by utilizing the third catalyst slurry layer. Compared with the prior art, by virtue of the gradient pore structure design, effective diffusion of oxygen from the gas diffusion layer into the catalyst layer is realized, the oxygen mass transfer resistance is reduced, meanwhile, the occurrence of a water logging phenomenon in the catalyst layer is slowed down, and the electrochemical performance of the fuel cell is remarkably improved.

The present application relates to the technical field of heat management materials, and particularly relates to a POD-based graphite film with interface affinity and a preparation method thereof, the preparation method being as follows: a modified POD polymer solution is prepared by polycondensation and copolymerization reaction of terephthalic acid, isophthalic acid, hydrazine salt and a functional monomer in a fuming sulfuric acid system, the functional monomer containing at least one of a carboxyl group and a hydroxyl group; after the modified POD polymer solution is scraped into a film, the film is formed through a coagulation bath, dried, and then subjected to oxygen plasma treatment to obtain a POD precursor film; after the POD precursor film is subjected to carbonization treatment and graphitization treatment, the POD-based graphite film is obtained, wherein a borate or an aqueous ferric nitrate solution is sprayed on the surface of the carbonized film before graphitization treatment. Through a synergistic modification strategy of molecular design-surface activation-interface optimization, the present application solves the problem of poor interface bonding force of traditional graphite films and is suitable for heat dissipation applications in various fields.