1772 results about "Cell structure" patented technology

The present invention relates to a radially collapsible frame (1) for a prosthetic valve, the frame (1) comprising an outflow end region (3) at a proximal end of the frame (1) and an inflow end region (2) at a distal end of the frame (1), opposite to the outflow end region (3). The frame (1) further includes at least two radially spaced commissure attachment regions 910, 10′, 10″) and a cell structure (30), composed of a plurality of lattice cells being arranged radially around a flow axis of the frame (1) and connecting the at least two commissure attachment regions (10, 10′, 10″). Finally, at least one anchoring / positioning arch (20, 20′, 20″) is provided, wherein said at least one anchoring / positioning arch (20, 20′, 20″) radially overlaps the cell structure (30) at least partially. In order to form the inventive frame from as a single piece, the invention further relates to a method comprising bending the at least one anchoring / positioning arch (20, 20′, 20″) towards the cell structure (30) of the frame (1).

The utility model provides an adapter piece structure, cell structure and energy storage big battery, adapter piece structure includes tab connecting part and post connecting part, tab connecting part is used for connecting with the tab of cell, post connecting part is connected with tab connecting part, post connecting part has first side, first side has the cleaning area that is used for the cleaning treatment, the first side has the cleaning area that is used for the cleaning treatment, the second side has the cleaning area that is used for the cleaning treatment. The cleaning area comprises a welding area and an annular area surrounding the periphery of the welding area, and the welding area is used for welding and fixing the pole connecting part and the pole of the cover plate, so that the welding area is ensured to be in a clean state before welding, the influence of impurities, oxides and the like on the welding quality is avoided, and the welding strength and reliability are improved; due to the existence of the annular area surrounding the welding area, external pollutants can be prevented from invading the welding area in the welding or connecting process, so that the purity and the stability of connection are improved, and high-quality welding of the pole connecting part and the pole can be ensured.

The invention discloses supercritical fluid foaming polyimide wave-absorbing foam and a preparation method thereof.The thermoplastic polyimide is prepared by the steps that aromatic dianhydride, aromatic diamine and aliphatic diamine serve as comonomers, polyimide acid is generated through solution polymerization, and then high-temperature cyclization is conducted; wherein the mole number of the aliphatic diamine accounts for 10-50% of the total mole number of the diamine, and the free volume and glass transition temperature of a molecular chain are effectively regulated and controlled by introduction of the aliphatic diamine; the wave-absorbing foam is prepared by taking polyimide as a matrix, doping 1-20wt% of wave-absorbing filler, and foaming for 1-3 hours in a supercritical carbon dioxide or nitrogen environment at the temperature of 180-220 DEG C and the pressure of 9-25MPa, through molecular structure design, the adsorption capacity and impact resistance of polyimide to carbon dioxide are remarkably improved, and the prepared foam has the advantages of light weight, high porosity, uniform foam structure and excellent heat resistance, can realize effective electromagnetic wave absorption in an X wave band, and is suitable for the fields of aerospace stealth and electromagnetic compatibility protection.

The invention belongs to the technical field of metamaterials, and particularly relates to a diamond substrate lattice metamaterial and an additive manufacturing method thereof. The structure is designed based on the geometric configuration of a diamond lattice, and has excellent high specific absorption mechanical properties. The design process comprises the following steps: firstly, carrying out spatial registration positioning on the basis of a unit cell structure with a preset wall thickness t and a unit cell width a; then, through a multi-unit-cell splicing design, the unit cells are spliced repeatedly for 12 times to form three-dimensional periodic stacking; then, the stacked structure is cut along the six datum planes; then cross plates are inserted into the six cutting faces respectively to enhance the integrity and strength of the structure; and finally, a complete DM plate lattice metamaterial structure is formed. The structure is provided with a plate-plate cross supporting framework, a complex three-dimensional inner cavity and highly symmetrical space distribution, the energy absorption capacity under unit mass is greatly improved, the mechanical properties are basically consistent in multiple directions, and the structure is suitable for the engineering fields of impact protection, energy absorption buffering and the like.

The invention discloses a topological optimization method and device for a continuous fiber periodic unit cell structure, and relates to the technical field of continuous fiber reinforced composite 3D printing. Determining the configuration of the selected periodic unit cell structure; constructing a feature component in a design domain of a periodic unit cell, performing projection on a fiber angle to calculate an elastic matrix, and determining a weight coefficient in an overlapping region based on a component level set function so as to solve an equivalent elastic matrix; solving the equivalent elastic property of the periodic unit cells of the fiber reinforced composite material; constructing a unit constitutive matrix in an interpolation format; constructing a periodic unit cell structure topological optimization model by taking the flexibility as a target function; calculating the derivative of the flexibility about the design variable formed by the artificial density of the alternative unit cell material, and carrying out sensitivity filtering treatment; optimization iterative analysis is carried out under different working conditions, and the convergence degree of an optimization result is evaluated by using an inequality relation. The problem of how to further improve the mechanical performance of the periodic unit cell structure is solved.

The invention discloses a passivation contact cell structure and a preparation method thereof, the structure comprises a silicon substrate, and the back surface of the silicon substrate comprises a metal contact area and a non-metal contact area; a metal contact area on the back face of the silicon substrate is of a suede structure, and the suede structure is sequentially provided with a back face first tunneling oxide layer, a back face first doped polycrystalline silicon layer, a back face second tunneling oxide layer, a back face second doped polycrystalline silicon layer, a back face aluminum oxide layer, a back face silicon nitride layer and a back face electrode in a stacked mode from inside to outside. A non-metal contact area on the back face of the silicon substrate is of a polished face structure, and a first back face tunneling oxide layer, a first back face doped polycrystalline silicon layer, a back face aluminum oxide layer and a back face silicon nitride layer are sequentially arranged on the polished face structure in a stacked mode from inside to outside. According to the battery structure, parasitic absorption can be reduced, current gain is brought, diffusion of silver ions in electrode slurry can be inhibited, and metal recombination is improved; the interface contact resistance can be obviously improved, and the cell efficiency can be improved.

A continuous fiber reinforced composite topological lattice structure design and 3D printing method comprises the steps that firstly, the elastic tensor of a unit cell structure of a 3D printing continuous fiber reinforced composite is represented, then a topological optimization model of the unit cell structure of the continuous fiber reinforced composite is constructed and divided into sub-regions, fiber tracks are generated for the sub-regions, and finally the topological lattice structure of the continuous fiber reinforced composite is obtained. The arrangement angle of the unit cell structures is calculated, the unit cell structures are periodically filled, and fiber tracks in the sub-regions are obtained; secondly, extracting fiber tracks of the sub-regions, obtaining minimum printing paths of the fiber tracks in each sub-region in combination with a periodic unit cell structure printing form, and connecting to obtain 3D printing sub-paths; then the 3D printing sub-paths are connected to obtain a 3D printing path of the continuous fiber reinforced composite topological lattice structure, and G-codes are generated in combination with the printing speed and the material feeding rate and used for sample piece manufacturing of a 3D printer; the manufacturing requirements of continuous fiber 3D printing are met.

The invention provides a solar cell and a photovoltaic module, and the solar cell comprises a semiconductor substrate which is provided with a first surface and a second surface which are opposite to each other; the doped semiconductor layer is arranged on the first surface of the semiconductor substrate; the dielectric layer is arranged on one side, deviating from the semiconductor substrate, of the doped semiconductor layer; the dielectric layer comprises a plurality of openings, and the openings expose a partial region of the doped semiconductor layer; a plurality of holes are formed in one side, far away from the semiconductor substrate, of the part, exposed at the opening, of the doped semiconductor layer; wherein the number of the unit area holes located in the middle area of the opening is larger than the number of the unit area holes located in the edge area of the opening; the electrode is arranged on the side, away from the semiconductor substrate, of the dielectric layer, and the electrode penetrates through the opening in the dielectric layer to be electrically connected with the doped semiconductor layer. According to the solar cell, the binding force between the electrode and the doped semiconductor layer is enhanced, and the stability of the cell structure is improved.

The invention relates to the technical field of image processing, and discloses a gynecological cell morphology intelligent identification method and system based on machine vision, and the method comprises the steps: collecting an original image of gynecological cells, carrying out the color normalization processing of the collected original image, carrying out the denoising processing through employing a wavelet threshold value, and carrying out the image enhancement through employing adaptive histogram equalization; according to the method, color consistency errors of different batches of dyed images are reduced, noise introduced in the image acquisition process is eliminated, cell structure details are reserved, and the accuracy of diagnosis is improved. And then image enhancement is carried out, the contrast ratio of cell nucleuses and cytoplasm is improved, so that the characteristics in the cells are more obvious, segmentation can be more accurately completed during subsequent image segmentation, the lesion level of the gynecological cells can be accurately identified, and the accuracy of an identification result is ensured.

The invention relates to a combined type multi-cell structure filling threshold beam assembly. Comprising two C-shaped thin plates and a combined multi-cell structure filling structure. The combined type multi-cell structure filling structure comprises a front end different-plane vertex reinforced multi-cell honeycomb, a rear end coplanar vertex reinforced multi-cell honeycomb and a connecting plate; the front-end different-plane vertex reinforced multi-cell honeycomb comprises a plurality of axially-serially-connected reinforced cell elements which are distributed along the axial direction of the doorsill beam and have orthohexagonal sections; the rear-end coplanar vertex reinforced multi-cell honeycomb comprises a plurality of thin-wall cell elements which are transversely distributed along the threshold beam and have regular hexagonal sections, the plurality of thin-wall cell elements form a coplanar multi-cell honeycomb structure by overlapping boundaries, and the inner sections of the regular hexagons are circular, so that arc-shaped reinforced cell walls are formed at the vertex positions of the regular hexagons; and the radiuses of the internal circles from the middle to the two sides are gradually increased. Large collision energy is transmitted and absorbed when a vehicle is subjected to front-face small-overlap offset collision and side-face collision, and the impact resistance of the threshold beam structure is improved.

A semiconductor memory device is provided. The device includes a cell structure, a peripheral structure, and an interconnection structure sequentially stacked on a support substrate, in which the cell structure includes lower electrodes, a dielectric layer and an upper electrode with the dielectric layer and the upper electrode sequentially covering the lower electrodes, the peripheral structure includes a peripheral substrate and transistors disposed on a front surface of the peripheral substrate, and an upper surface of the upper electrode faces a back surface of the peripheral substrate.

The invention relates to the technical field of grain and oil processing, in particular to a flaxseed microwave-assisted wall breaking and nitrogen protection cold pressing process. The method comprises the following steps: putting flaxseeds into a microwave bin, carrying out intermittent microwave treatment, and carrying out blank rolling treatment on the flaxseeds by adopting a double-helix blank rolling mill to obtain crude oil; and after degumming, deacidifying, decolorizing and deodorizing the crude oil, filtering the crude oil to obtain refined oil. According to the method, the flaxseed cell wall rupture rate is increased through microwave pretreatment, more grease can be released, the grease flow resistance can be reduced, the released grease can be rapidly separated from a fiber network and resorption is reduced through a nitrogen-assisted pressing mode, and after first-time cold pressing, oil cakes are subjected to secondary microwave treatment, so that the flaxseed oil yield is improved. The method can further destroy residual cell structures, and can prevent oil cake hardening caused by oxidation under the protection of nitrogen, so that the oil yield during secondary repressing is increased.

The invention relates to the technical field of food processing, and provides a tremella beverage processing device and process capable of freezing, breaking walls and locking freshness and a beverage, the tremella beverage processing device comprises a freezing box, and further comprises an inner ring cylinder arranged on the inner wall of the freezing box, and an annular isolation cavity is formed between the inner ring cylinder and the outer inner wall of the freezing box; a vertical column is arranged in the middle of the inner ring cylinder, three erecting halfpace are installed on the vertical column at equal intervals, three hanging grooves are annularly formed in the top of each erecting halfpace at equal intervals, fan-shaped inclined hole plates with hanging blocks installed at the bottoms are clamped in the hanging grooves, and inserting openings are formed in the outer sides of the fan-shaped inclined hole plates. The two sets of airflow arc nets are installed at the top and the bottom of the fan-shaped inclined hole plate correspondingly, and each airflow arc net is composed of a plurality of single arc pipes. When the device is used, material accumulation is avoided through three-dimensional layered suspension and two-way airflow coverage, temperature gradient difference between the upper layer and the lower layer is avoided by combining magnetic control cold air access, damage to tremella cell structures is avoided, and the effect of freezing and fresh-keeping of tremella is guaranteed.

The invention discloses a novel chemical material liquid optical granularity instrument with an anti-corrosion sample pool structure, and relates to the technical field of novel chemical material detection.The novel chemical material liquid optical granularity instrument comprises a pool body and a detection assembly, a sealing cover is arranged at the top of the pool body, a stirring assembly is arranged in the middle of the sealing cover, and the detection assembly is arranged at the top of the stirring assembly; the detection assembly comprises a connecting rod, the top of the stirring assembly is rotationally connected with the connecting rod, and one end of the connecting rod is rotationally connected with a piston rod. The gear set driven by the motor drives the stirring shaft to rotate, so that samples are uniformly mixed by the stirring rod, particle sedimentation is prevented, stirring motion is converted into reciprocating motion of the piston rod by utilizing the connecting rod mechanism, and continuous pumping of a medium is realized by matching with a plurality of one-way valves; meanwhile, the liquid suction head on the stirring rod synchronously sucks samples from different point positions in the rotating process, a dynamic multi-point sampling mode is formed, and accidental errors caused by traditional fixed point sampling are effectively overcome.

The invention discloses a self-adaptive impact-resistant protective metamaterial with a Poisson's ratio autonomous constraint function, which comprises a PMP honeycomb, the PMP honeycomb comprises a plurality of honeycomb unit cell structures, and each honeycomb unit cell structure comprises a hexagonal thin-wall structure I and a hexagonal thin-wall structure II internally connected in the hexagonal thin-wall structure I. The invention further discloses a preparation method of the self-adaptive impact-resistant protective metamaterial with the Poisson's ratio autonomous constraint function. Compared with an SHC honeycomb, the PMP honeycomb has the advantages that the dynamic Poisson ratio of the PMP honeycomb is relatively stable in the whole crushing process, and the initial fluctuation range is only 0.1. In addition, the average dynamic Poisson's ratio of the PMP honeycomb is relatively small, indicating that the PMP honeycomb is almost free of transverse deformation without additional assistance. After the PMP honeycomb is compressed to be densified, the transverse length of the PMP honeycomb is only increased by 3.5%. Wherein the PMP honeycomb has better self-constraint capability, so that the PMP honeycomb has a more stable energy absorption mode.

The present invention relates to a radially collapsible frame (1) for a prosthetic valve, the frame (1) comprising an outflow end region (3) at a proximal end of the frame (1) and an inflow end region (2) at a distal end of the frame (1), opposite to the outflow end region (3). The frame (1) further includes at least two radially spaced commissure attachment regions 910, 10′, 10″) and a cell structure (30), composed of a plurality of lattice cells being arranged radially around a flow axis of the frame (1) and connecting the at least two commissure attachment regions (10, 10′, 10″). Finally, at least one anchoring / positioning arch (20, 20′, 20″) is provided, wherein said at least one anchoring / positioning arch (20, 20′, 20″) radially overlaps the cell structure (30) at least partially. In order to form the Inventive frame from as a single piece, the invention further relates to a method comprising bending the at least one anchoring / positioning arch (20, 20′, 20″) towards the cell structure (30) of the frame (1).

On a single semiconductor substrate, a main semiconductor device is provided in an active-region operating region and a current sensing portion for detecting overcurrent flowing through the main semiconductor device is provided in a sensing region. The main semiconductor device and the current sensing portion are vertical IGBTs with a trench gate structure. All cells of the main semiconductor device have a CS region. Some of the cells of the current sensing portion have the same structure as the structure of the cells of the main semiconductor device while some of the cells have a structure that is free of CS regions but otherwise the same as the structure of the cells of the main semiconductor device. An average carrier concentration of the CS regions per unit area of the sensing region is less than that of the CS regions per unit area of the active-region operating region.

The present application discloses a cell structure of a super flash comprising: a word line gate, a floating gate, a control gate, and an erase gate. The floating gate comprises a first TiN layer located on a side face of the control gate and a second polysilicon layer formed at the top of the first TiN layer. The second polysilicon layer is in electric contact with the first TiN layer. The erase gate is located at the top of the second polysilicon layer, and the erase gate and the floating gate are spaced from each other by a second inter-gate dielectric layer therebetween. During erasing, the top angle of the second polysilicon layer generates point discharge, thereby reducing an erasing voltage. The present application also discloses a method for manufacturing a super flash.

The invention discloses a back contact solar cell and a preparation method thereof, the back contact solar cell comprises a semiconductor substrate, the semiconductor substrate is provided with a first surface and a second surface which are opposite to each other, the first surface comprises a plurality of non-groove areas and a plurality of groove areas, the non-groove areas and the groove areas are alternately arranged on the first surface; a tunneling oxide layer and an N-type doped crystalline silicon layer; a first intrinsic amorphous silicon layer and a P-type doped amorphous silicon layer; and the isolation structure comprises an isolation layer and an isolation groove. According to the invention, the preparation process window of the back contact solar cell is enlarged, the process difficulty is reduced, and the surface passivation effect of the P region is improved, so that the performance of the solar cell can reach the effect equivalent to that of the existing HBC cell structure.

The invention relates to a multistable mechanical metamaterial structure with a tension characteristic, which belongs to the field of mechanical metamaterials and mainly comprises a multistable mechanical metamaterial cell structure, and the multistable mechanical metamaterial cell structure comprises a tension integral structure component, a degree-of-freedom constraint component and a connecting component. Under the action of a tensioning integral structure, when the structure is not subjected to external load, the structure is subjected to interaction of internal stress, and the balance is achieved in a self-stabilization state; according to the multistable mechanical metamaterial cell element structure with the tension characteristic, the structure of the position where each side of the square outline is located has two steady-state configurations, and the cell element structures are connected through a rectangular array to form the multistable mechanical metamaterial structure with the tension characteristic. The tensegrity structure and the mechanical metamaterial structure are combined, the types of existing mechanical metamaterial cell element structures are enriched, and a brand new direction is opened up for design, analysis and application of the tensegrity mechanical metamaterial structure.

The invention relates to a mechanical metamaterial structure based on a six-rod and six-cable tensegrity structure, and belongs to the field of mechanical metamaterials, the mechanical metamaterial structure comprises a six-rod and six-cable tensegrity cell structure, and the tensegrity cell structure comprises corner assemblies, first connecting shafts, fixing rings and middle tensegrity assemblies; under the action of the middle tensioning assembly, when the structure is not subjected to an external load, the structure is subjected to interaction of internal stress, and the balance is achieved in a self-stabilization state; under the state of being subjected to an external load, the structure can generate self-adaptive deformation; and the external load is removed again, and the structure can recover to the initial state. The mechanical metamaterial structure based on the six-rod six-cable tensegrity structure has the advantages of adaptivity, isotropy, negative Poisson's ratio and the like, the tensegrity structure and the mechanical metamaterial structure are combined, and the types of existing mechanical metamaterial cell element structures are enriched; and a brand new direction is opened up for the design, analysis and application of the tensioning mechanical metamaterial structure.

The present invention discloses a two-terminal perovskite-silicon tandem cell and a preparation method thereof, which are applied to the technical field of perovskite solar cells. The two-terminal perovskite-silicon tandem cell includes a tandem cell sheet, and the tandem cell sheet includes a perovskite cell structure for absorbing visible light and a silicon cell structure for absorbing near-infrared light. A near-infrared light conversion layer is provided on the light-incident side surface of the two-terminal perovskite-silicon tandem cell, and the near-infrared light conversion layer is a down-conversion thin film. By converting the short wave in sunlight into a long wave through the near-infrared light conversion layer, the problem of current mismatch caused by the two-terminal perovskite-silicon tandem cell under the illumination condition with a relatively high proportion of visible light is solved, so that the two-terminal perovskite-silicon tandem cell has high performance.

The invention relates to a perovskite / crystalline silicon laminated solar cell structure taking a tin dioxide thin film as a composite layer and a preparation method of the perovskite / crystalline silicon laminated solar cell structure, and belongs to the technical field of photovoltaics. According to the perovskite / crystalline silicon laminated solar cell structure, the tin dioxide thin film is used as a composite layer, so that the cost of cell preparation is reduced; in the preparation method of the perovskite / crystalline silicon laminated solar cell, the composite layer and the electron transport layer can adopt the same preparation method, so that the equipment cost in the preparation process is reduced; the perovskite / crystalline silicon laminated solar cell obtained by the cell structure and the preparation method provided by the invention is relatively low in preparation cost and relatively high in photoelectric conversion efficiency.

The invention relates to the technical field of acoustic function material structure design, in particular to a Kresling origami-based local resonance phononic crystal, which comprises a substrate and a vibration reduction array embedded on the substrate, the vibration reduction array comprises a plurality of unit cell structures arranged in an array. Each unit cell structure comprises at least two spiral Kresling paper folding structures, and lead injection holes penetrating through the Kresling paper folding structures are formed in the Kresling paper folding structures. The substrate is one of an Archimedes spiral parallel plate, a chessboard embedded paper-cut, a double-layer Miura origami or a bistable shell based on a shape memory polymer; the material of the Kresling origami structure is lead, the density is 11600 kg / m < 3 >, the elastic modulus is 20.80 GPa, and the Poisson ratio is 0.369. According to the local resonance photonic crystal provided by the invention, through the unique geometric characteristics, a remarkable vibration band gap is generated in a low-frequency band, and vibration propagation in a specific frequency band is effectively inhibited; according to the Kresling paper folding structure, diversified vibration band gap configuration can be achieved by adjusting the folding angle and the number of layers.

The invention discloses a semiconductor device which comprises a cellular structure, and the cellular structure comprises an N + substrate, an N-drift layer and a functional area. The N-drift layer is located on the N + substrate; the functional region is embedded into one side, away from the N + substrate, of the N-drift layer, the functional region comprises two subunits and a second N + source region, and each subunit comprises a P + contact region, a P-type body region, a first N + source region and a first trench gate structure; the first N + source region is located on the P-type body region, the first groove is located between the P-type body region and the P + contact region, the first gate oxide layer covers the inner wall of the first groove, a first filling groove is formed in the inner wall of the first gate oxide layer, the first gate is filled in the first filling groove, and the P + shielding region of the P + contact region covers the bottom of the first gate oxide layer; and a second N + source region is arranged between the first trench gate structures of the two subunits. According to the device, the effective utilization rate of a channel can be improved, the specific on-resistance is further reduced, and the problem of long reverse recovery time is solved.

The utility model relates to the technical field of cell culture, and discloses a chamber structure adaptive to Faraday wave assembly, which comprises a pore plate, N mounting grooves are formed in the top surface of the pore plate, and N is greater than or equal to 1; the N container bodies are arranged on the pore plate in a rectangular array mode or a central symmetry mode and correspondingly arranged in the N mounting grooves, a plurality of culture grooves used for cell assembly are sequentially formed in the container bodies in the longitudinal direction from the top face to the bottom face, and the widths of the culture grooves are gradually decreased. According to the device, internal cells or cell microspheres can be gathered into a sound potential well of a standing wave sound field under the action of acoustic pressure, gravity and buoyancy under the action of the sound field and are tightly arranged according to an expected pattern, and a culture solution is longitudinally stacked in a plurality of culture tanks of which the widths are gradually reduced; longitudinal shape limitation on the tissue structure is realized, and complex three-dimensional longitudinal arrangement is constructed through mutual combination of the two. Therefore, the requirement of constructing any multi-scale and complex cell structure is met. And forming a multi-layer structure.

A cell module for an electrical energy storage device of a motor vehicle includes at least one cell structure made up of energy storage cells, a metallic cell module frame, enclosing the at least one cell structure, for clamping the energy storage cells, and a measuring device for detecting a deformation of the cell module frame related to cell expansion. The measuring device includes a passive resistive extension sensor having a deformation-dependent electrical resistance and a measuring unit connected to the extension sensor to output an electrical measurement signal characterizing the deformation-dependent electrical resistance of the extension sensor. The extension sensor is formed by the metallic cell module frame, with which the measuring unit is electrically contacted.

A circuit includes a scan chain comprising a cell structure, wherein the cell structure comprises a first plural number (N) of stages, and each of the stages is configured to store a bit. The circuit includes a second plural number (S) of multiplexers operatively coupled to the scan chain, wherein the S is determined asNM,where the M represents a diagnostic resolution. The multiplexers are each configured to receive a respective one of S control signals to selectively bypass a corresponding subset of the stages.

The invention relates to the technical field of sound absorption materials, in particular to an aerogel and cork composite sound absorption material with a dual-scale pore structure and a preparation method. The preparation method of the aerogel-softwood composite sound absorption material with the double-scale pore structure comprises the following steps that softwood particles subjected to microwave treatment are placed in a SiO2 aerogel precursor solution to be subjected to vacuum impregnation treatment, then hydrolysis and condensation polymerization are conducted, a three-dimensional network structure is formed through crosslinking, freeze drying is conducted after water soaking, and the aerogel-softwood composite sound absorption material with the double-scale pore structure is obtained. SiO2 aerogel and cork composite particles are obtained; and spraying a polyurethane adhesive into the SiO2 aerogel and cork composite particles, and then carrying out hot press molding to obtain the aerogel and cork composite sound absorption material with the dual-scale pore structure. According to the preparation method, microwave treatment and dipping treatment are combined, so that the sound absorption performance of the prepared aerogel and cork composite sound absorption material with the double-scale pore structure is improved, and the problem that sound absorption is not facilitated due to the unique cell structure of cork is solved.

A trench cell structure having Schottky barriers and a preparation method thereof are provided. The trench cell structure includes a silicon substrate. A back metal layer is disposed on a back surface of the silicon substrate. The silicon substrate is heavily doped. A body region, a dielectric layer, and a front metal layer are sequentially disposed on a front surface of the silicon substrate from bottom to top. The drift region is lightly doped. Deep trench regions and a shallow trench region are defined on the body region at intervals. The deep trench regions and the shallow trench region include shielding electrodes and ohmic contact structures. The Schottky contact barriers are disposed between the deep trench regions and the shallow trench region, which reduces anode carrier injection efficiency when the trench cell structure is forwardly conducted, reduces reverse recovery charge, and reduces a reverse recovery time.