164results about How to "Strong interaction" patented technology

The invention discloses a personalized digital human image creation and generation system based on deep learning, which relates to the technical field of digital human generation and comprises a multivariate data acquisition module, an image creation module, a model storage module, a matching module and a rendering interaction module. The multivariate data acquisition module collects facial images and whole body photos through a camera, and records voice samples through a microphone. According to the invention, by constructing the multivariate data acquisition module, the image creation module, the model storage module, the matching module and the rendering interaction module, full-process automatic processing from data acquisition to digital human image generation is realized; the multivariate data acquisition module can comprehensively capture the appearance and voice features of a user, and the image creation module extracts feature vectors by using a deep learning technology and generates a personalized digital human image by using a generative adversarial network technology.

The invention relates to the technical field of oilfield exploitation, and discloses a nanometer oil-displacing agent for oilfield oil extraction and a preparation method thereof.The nanometer oil-displacing agent takes modified nanometer silicon dioxide and a surfactant as main components, polymer macromolecules are modified on the surface of the nanometer silicon dioxide to serve as a main body of the nanometer oil-displacing agent, and the nanometer oil-displacing agent is prepared. Under the action of the surfactant, the nano silicon dioxide can flow into the fine throat and the micro throat, and the polymer macromolecules of the branched structure can generate a relatively strong interaction force with the rock, so that the polymer macromolecules are firmly adhered to the surface of the rock, the adhesion of crude oil on the surface of the rock is reduced, a smooth crude oil channel is constructed, and the flowing pressure of liquid is reduced; and crude oil fluidity is improved. The structure of the cross-linking agent contains quaternary ammonium cations, so that the electrostatic repulsion effect between nano silicon dioxide can be greatly enhanced, aggregation between nano silicon dioxide and nano silicon dioxide can be avoided, the interfacial tension can be efficiently maintained, the oil-water interfacial tension is greatly reduced, and the recovery rate of crude oil is effectively increased.

The invention discloses application of threonine dehydratase in regulation and control of growth of Didymeria segeticola and application of threonine dehydratase serving as a bactericide target in regulation and control of growth of Didymeria segeticola. The threonine dehydratase gene Td disclosed by the invention is derived from Didymeria segeticola, and a knockout mutant is obtained by constructing a knockout gene segment of the Td gene and introducing the knockout gene segment into a D.segeticola protoplast. Experiments find that the Td gene plays a role in growth of D.segeticola, in-vivo pyruvic acid content, in-vivo ATP (adenosine triphosphate) content and sensitivity to wuyiencin. Molecular docking analysis, molecular dynamics simulation and trace thermophoresis experiments prove that the threonine dehydratase can be used as a bactericide target, and the bactericide wuyiencin is obtained through screening. The threonine dehydratase disclosed by the invention can be used as a bactericide target and a key protein of a disease pathogenic mechanism, and has a wide application prospect in prevention and treatment of plant pathogenic fungal diseases.

The invention discloses a weather-resistant flame-retardant crosslinked polyethylene insulating material, a cable material and a preparation method. The weather-resistant flame-retardant crosslinked polyethylene insulating material comprises the following components in parts by mass: 60-70 parts of linear low-density polyethylene (LLDPE), 20-25 parts of low-density polyethylene (LDPE) and 15-20 parts of a copolymerization mixture, the copolymerization mixture is prepared from a styrene-ethylene / butylene-styrene block copolymer (SEBS) and styrene-ethylene / butylene-styrene block copolymer grafted maleic anhydride (SEBS-g-MAH). The cable material disclosed by the invention not only can give consideration to the flame-retardant characteristic and light aging resistance of a cable insulating material, but also can inhibit the damage of moisture to the insulating material under an alternating electric field, reduce the moisture entering the insulating material in a natural environment, and improve the water tree resistance of the material.

The invention discloses an oil exploitation tensile cable based on a high polymer material and a production method thereof, and relates to the technical field of cables, the cable comprises a conductor and an insulating layer wrapping the conductor, the insulating layer is made of a bio-based high polymer composite material, the bio-based polymer composite material comprises the following components in parts by weight: 50-70 parts of a bio-based polymer matrix and 20-30 parts of reinforced fibers. The bio-based polymer composite material is adopted as an insulating layer of the tensile cable for oil exploitation, so that the environmental protection performance and biodegradability of the tensile cable for oil exploitation are improved; the material is composed of polylactic acid, a polyhydroxyalkanoate bio-based polymer matrix and a plurality of high-performance additives, conventional synthetic fiber reinforcement is included, natural fibers are introduced to be compounded with a bio-based polymer material, and the unique fiber structure and surface performance of the material can form good interaction with bio-based polymers, so that the high-performance composite material is obtained. Therefore, the strength and toughness of the material are improved.

The invention discloses a broadband multi-level three-dimensional vertical interconnection structure based on an HTCC technology, and belongs to the field of radio frequency front-end system integration. The structure comprises a PCB mother board, a ball grid array and an SiP module which are sequentially arranged from bottom to top, in the SiP module, the chips are distributed among different levels, and a connection mode of the chips among the different levels is set; a radio frequency signal is transmitted upwards through the PCB mother board, and after flowing through the lower-layer bare chip, the radio frequency signal is orderly transmitted upwards through the strip line and the signal via hole in the HTCC and finally transmitted to the surface-layer chip, so that a complete and efficient vertical interconnection signal transmission system is formed. According to the invention, the layout flexibility of interconnection lines among the chips is improved, the wiring crosstalk among the chips is reduced, the three-dimensional integration scene of bare chips in the HTCC is greatly widened, high-density SiP packaging is realized, and the strict technical requirements on radio frequency signal transmission, processing and chip interconnection under a complex circuit architecture can be met.

The invention belongs to the technical field of organic photoelectric materials, and particularly discloses a multifunctional organic semiconductor material with cyano phosphonic acid as an anchoring group and a preparation method and application of the multifunctional organic semiconductor material. The cyano group in the anchoring group can effectively increase the deprotonation capability of phosphonic acid and enhance the hydrophilicity of the anchoring group, so that the material has unique amphiphilic characteristics and shows good wettability, and further, the high-quality perovskite thin film is obtained. Meanwhile, F atoms in the arylamine enhance the interface interaction between the hole transport layer and the perovskite layer, thereby further regulating the crystallization of the perovskite, passivating the bottom interface defect of the perovskite, and inhibiting the non-radiative recombination of the interface. The organic semiconductor material is highly conjugated in molecules and good in photo-thermal stability. When the hole transport layer is applied to a trans-perovskite solar cell, the photoelectric conversion efficiency of more than 24.5% can be obtained, and the hole transport layer shows a good industrial application prospect.

The invention relates to the field of biological detection, in particular to a pretreatment kit for a positive sample containing chemical magnetic beads and application of the pretreatment kit. According to the method, the chemical magnetic beads are creatively applied to mass spectrum identification, and the strong adsorption capacity of the chemical magnetic beads to bacteria is utilized, so that the cost can be saved, and the pretreatment time of mass spectrum detection is greatly shortened. Meanwhile, an incubation solution is used for replacing a sample, so that the environment of bacteria is simpler, efficient adsorption of the magnetic beads to the bacteria is more facilitated, a bacteria-chemical magnetic bead compound can be extracted through simple magnetic adsorption, then the bacteria on the bacteria-chemical magnetic bead compound are eluted and detected, the purity of detected mycoprotein is very high, species identification can be achieved through mass spectrum, and the method is suitable for large-scale popularization and application. A new thought is provided for mass spectrum microorganism detection.

The invention discloses a windproof and breathable composite fabric and application thereof. The windproof and breathable composite fabric is used for solving the technical problem that in the prior art, the windproof and breathable performance, the wear-resistant and antistatic performance and the washing resistance of a polyester fiber fabric need to be further improved. The preparation method comprises the following steps: putting a gray fabric into a pretreatment solution for pretreatment to obtain a pretreated gray fabric, taking modified quaternary ammonium salt as a cross-linking agent, promoting cross-linking of a polyurethane prepolymer co-blocked by modified polysiloxane and polyethylene glycol, preparing epoxy group-terminated modified polyurethane, and carrying out heat treatment to obtain the pretreated gray fabric. The modified polyurethane and the tetrabutyl titanate are dispersed and mixed in the alkaline emulsion, and the prepared finishing liquid is used for padding and modifying the pretreated gray fabric, so that the windproof and moisture-permeable performance of the composite fabric is effectively improved, and the antistatic performance, wear resistance and pilling resistance of the composite fabric are also improved.

The invention provides a wet oxidation catalyst and a preparation method thereof, and a method for treating organic amine wastewater generated by reconstituted tobacco processing through catalytic wet oxidation. The wet oxidation catalyst comprises precious metal active components and a cerium oxide carrier, the cerium oxide carrier is of a porous structure, valence states of Ce in the cerium oxide carrier include positive tetravalence states, part of the precious metal active components are dispersed on the inner surface and the outer surface of the cerium oxide carrier, part of the precious metal active components are embedded into a framework of the cerium oxide carrier, and the cerium oxide carrier is of a porous structure. The valence states of the noble metal active component comprise a zero valence state and an oxidation valence state, and the content of the noble metal active component in the wet oxidation catalyst is 0.1-5% by weight. Due to the fact that precious metal ions are embedded into a cerium oxide carrier framework, interaction between cerium oxide and precious metal active components is stronger, the contact area is larger, active oxygen reaction sites can be provided more efficiently, and organic amine nitrogen substances such as nicotine in the reconstituted tobacco processing wastewater can be decomposed.

The invention relates to the field of biological detection, in particular to a positive sample pretreatment kit and application thereof. The method comprises the following steps: providing a simple survival environment for bacteria by utilizing incubation liquid, and then utilizing the interaction of opposite electric properties between chemical magnetic beads and the bacteria, that is, when the bacteria in a positive sample are negatively charged, the chemical magnetic beads are positive magnetic beads; or when the bacteria in the positive sample are positively charged and the chemical magnetic beads are negative electromagnetic beads, the bacteria-magnetic bead compound is obtained, the operation is simple, the cost is low, the enrichment efficiency is high, the impurity interference resistance is high, the activity state of the enriched bacteria is not changed, the method can be used for subsequent mass spectrum identification and metabolic activity analysis, the application range is wide, and the method is suitable for popularization and application. Various in-vitro samples can be universally enriched, and the method has great significance on the development of the IVD field.

The invention discloses a financial terminal application and SP timeout protocol negotiation method, system, device and medium wherein the financial terminal application and SP timeout protocol negotiation method comprises: initiating a request to the device, the request carrying a timeout time parameter; receiving a timeout time value sent by the device in response to the timeout time parameter, wherein the timeout time value is determined based on the device capability and configuration; adjusting an application timeout time value according to the timeout time value of the equipment, so that the application timeout time value is consistent with the timeout time value of the equipment; according to the method, the error rate of the device can be reduced, it is ensured that interaction between the application program and the device is smoother and more efficient, and meanwhile service requirements and user experience can be met.

The invention belongs to the field of event argument extraction, and provides an event co-occurrence prefix-based event argument extraction method, which comprises the steps of BART-Marge model construction, coding intermediate key and coding intermediate vector extraction, template coding unit coding, prefix splicing, text coding, network output calculation, vector Infoext acquisition, bias addition and event argument extraction. According to the method, semantic information of all events existing in input is extracted, and prefixes are extracted and added, so that the capability of processing a complex event relation by a model is enhanced; through the arrangement for introducing two Info-Qs, the constraint of the model on the output format is enhanced, and the disorder of the output format of the model is prevented; by introducing an adjustable copying mechanism, the problem of potential noise caused by introduction of extra information in attention calculation of each layer is solved.

The invention relates to the technical field of cables, in particular to a semiconductive shielding material and a preparation method thereof, oxygen plasma reaction equipment and a cable. The semi-conductive shielding material is prepared from the following components in parts by weight: 55 to 65 parts of vinyl resin matrix, 1.5 to 2 parts of cross-linking agent and 30 to 40 parts of filler, the filler at least comprises modified conductive filler; the modified conductive filler comprises a first oxygen-containing functional group and a second oxygen-containing functional group, the first oxygen-containing functional group comprises one or more of hydroxyl and ether, and the second oxygen-containing functional group comprises one or more of carbonyl, COO-and carboxyl; the modified conductive filler meets the following relational expression: C1 / n1 < = C2 / n2, C1 is the total concentration of the first oxygen-containing functional groups, n1 is the number of functional group types included in the first oxygen-containing functional groups, C2 is the total concentration of the second oxygen-containing functional groups, and n2 is the number of functional group types included in the second oxygen-containing functional groups.

A spinel-structured multi-component composite oxide catalyst comprises active metals and base metals, and the active metals are 2-5 of iron, cobalt, nickel, ruthenium, molybdenum, manganese, platinum, palladium and chromium; the base metal is a composite metal oxide formed by two or three mixed metals of magnesium, aluminum, zinc, manganese, iron, cobalt, titanium, chromium and nickel; the particle size of the active metal particles is 2-50 nanometers, more preferably 2-20 nanometers. The catalyst has the characteristics of high transition metal content, uniform active site distribution, small crystal grain, large specific surface area, sintering inhibition, good stability and the like, and high-magnification synthesis of carbon nanotube powder is realized by cracking hydrocarbon carbon source gas.

The invention relates to a preparation method of a membrane electrode suitable for a low-humidity working condition, which comprises the following steps: (1) dissolving an ionic liquid in ultrapure water, and uniformly dispersing to obtain an ionic liquid aqueous solution; (2) uniformly mixing the ionic liquid aqueous solution obtained in the step (1) with a catalyst, coating the surface of the catalyst with the ionic liquid, and cleaning and drying the coated catalyst to obtain an ionic liquid coated catalyst; (3) uniformly mixing the ionic liquid coated catalyst obtained in the step (2) with an ionomer and a dispersing solvent, preparing catalyst slurry, and spraying to prepare a cathode catalyst layer; and (4) hot-pressing the cathode catalyst layer and the anode catalyst layer obtained in the step (3) to two sides of a proton exchange membrane to prepare the membrane electrode. Compared with the prior art, the membrane electrode disclosed by the invention can ensure high-efficiency transmission of protons in the catalyst layer under a low-humidity working condition, so that wide-working-condition operation is realized; meanwhile, oxygen mass transfer is enhanced, and the battery performance under high current density is improved.

The invention relates to a preparation method of an oil-proofing agent based on polymerization of acrylic acid and organic silicon, and belongs to the technical field of polymer synthesis. The preparation method comprises the following steps: adding methyl acrylate, hydroxyethyl acrylate, dithiothreitol, m-trifluoromethylcinnamyl aldehyde and triethylamine into a reaction kettle, and stirring and heating to react; adding an initiator, and continuously reacting, so that the acrylic monomer is subjected to polymerization reaction to form a polymer with good stability and mobility; alpha, omega-dihydroxy polydimethylsiloxane is continuously added, the reaction is continued, and the organosilicon linear body and the polymer are subjected to a polymerization reaction; adding an emulsifier, stirring, mixing and reacting to obtain an oil-proofing agent; the oil-proof agent is added into the lunch box paper pulp and is uniformly stirred, so that the polymer is uniformly distributed on the surface of the lunch box paper pulp to form a compact oil-proof film, and the attachment of oil stains is effectively prevented; the oil-proof agent prepared by the invention has good oil-proof performance, can effectively prevent oil stain adhesion, and keeps food packages and tableware clean.

The invention relates to a heat dissipation coating containing modified nanoparticles and a preparation method thereof, and belongs to the technical field of paints.The heat dissipation coating is prepared from, by weight, 40-60 parts of waterborne resin dispersion liquid, 15-20 parts of modified nanoparticles, 0.1-0.2 part of defoaming agent, 0.1-0.5 part of dispersing agent and 1-2 parts of flatting agent. The modified nano particles are obtained by modifying nano particles with a silane coupling agent, mixing the modified nano particles with graphene and then carrying out heat treatment, the water-based resin dispersion liquid and the modified nano particles are uniformly mixed according to the proportion to obtain mixed slurry, then the defoaming agent, the dispersing agent and the flatting agent are added into the mixed slurry, and the heat dissipation coating is obtained after ball milling treatment. The modified nano particles provided by the invention are applied to the heat dissipation coating, the heat dissipation performance is more remarkable than that of nano aluminum oxide, meanwhile, the modified nano particles have good adhesive force and excellent hardness, and the heat conductivity loss of the modified nano particle heat dissipation coating after moisture absorption treatment is extremely small.

The invention belongs to the field of lithium-sulfur secondary batteries, and relates to a lithium-sulfur battery positive electrode and a preparation method thereof.The positive electrode active layer of the positive electrode comprises an active sulfur-graphene composite material, a conductive agent and polyvinylidene fluoride; the active sulfur is sublimed sulfur particles of which the surfaces are loaded with cerium single atoms. The cerium monatomic catalyst can form strong chemical bonding with polysulfide, and shuttling of the polysulfide can be effectively inhibited in cooperation with a physical barrier of graphene; the cerium has relatively high selective adsorption on long-chain polysulfide, the redox reaction energy barrier of the polysulfide is reduced, the utilization rate of sulfur is improved, the loss of active substances is reduced, and the coulombic efficiency, the cycle stability and the charge-discharge efficiency of the battery are improved; the conductivity of sulfur can be enhanced, rapid transmission of electrons in the whole electrode is promoted, and the rate capability of the battery is improved; meanwhile, cerium single atoms can form a stable coordination structure on the surface of sulfur, so that the volume expansion of sulfur in the charge-discharge process is limited, and the cycle life of the battery is prolonged.

The invention discloses a whitening composition suitable for sensitive skin and capable of improving skin resistance and self-healing power and application of the whitening composition, and belongs to the technical field of cosmetics. The whitening composition provided by the invention is prepared from the following components in parts by mass: 0.1 to 3 parts of mulberry root extract, 0.1 to 3 parts of golden camellia extract, 0.01 to 1 part of wood apple extract, 0.1 to 3 parts of herba andrographitis extract and 0.01 to 1 part of epigallocatechin gallate. According to the whitening composition disclosed by the invention, the components in a proper mass ratio are selected for compounding, and the obtained whitening composition can effectively promote generation and secretion of human beta defensin in a skin barrier, so that the tight connection function of the skin barrier is effectively improved, the resistance of the skin is improved, and the metabolism of the skin can be effectively promoted; the self-healing power of the skin is activated; the skin is mildly whitened.

The invention provides an oligomeric micromolecule donor compound as well as a preparation method and application thereof. The oligomeric small molecule donor compound belongs to a brand-new long conjugate organic small molecule donor material containing a connecting unit, two or more efficient organic small molecule donors are combined into a whole, the conjugate length is prolonged, and a series of novel oligomeric small molecule donor materials are synthesized. The oligomeric small molecule donor compound disclosed by the invention has good batch repeatability and relatively good film-forming property; the oligomeric small molecule donor compound prolongs the conjugate length, has excellent ultraviolet-visible light absorption performance, has strong interaction and aggregation among molecules, can realize good phase separation from a non-fullerene receptor, has a proper electron energy level, and is suitable for being used as an electron donor material in an organic solar cell.

The invention belongs to the technical field of multi-modal interaction, and particularly relates to a control system and equipment for realizing multi-modal interaction by using an AI large model. According to the method, intelligent judgment can be made according to the use habit and the input accuracy of the user through the obtained multi-modal input, the user can interact with the system more naturally and smoothly in a complex environment, the control system can process a plurality of input sources at the same time, judgment is made according to the completion degree, the accuracy and historical data, and the user experience is improved. When the input is inconsistent, the input preference of the user can be gradually learned through reasonable priority selection, accurate and reliable response of the system and historical data of the emphasis degree module, better customization support is provided in future interaction, and the individuation degree of user experience is improved.

The invention discloses a user experience interaction method based on a VR (virtual reality) engine, and relates to the technical field of interaction experiences, features of voice, gestures, touch and sight signals are extracted through a deep learning model, signal fusion is performed in combination with a cross-modal attention mechanism, user behavior understanding ability is enhanced, and meanwhile, user experience is improved. A synchronous localization and mapping (SLAM) technology is utilized to capture the position and operation context of a user in a real environment in real time, so that interaction is more natural and smoother; secondly, an AR engine is combined with light and shadow consistency calculation, a physical simulation technology and dynamic environment adaptation, deep fusion of a virtual object and a real environment is achieved, the problem of virtual-real separation in a traditional method is solved, and the immersion of interaction is greatly improved; besides, user intentions including interaction types, target objects and task targets are predicted through dynamic Bayesian network modeling, a prediction model is optimized in combination with real-time feedback and a self-learning mechanism, and personalized requirements of users are gradually met.

The invention belongs to the field of hydrogen energy, and discloses a preparation method of a Ni-based catalyst for hydrogen production through ammonia decomposition. The preparation method comprises the following steps: 1) mixing metal cerium salt and metal zirconium salt with deionized water in proportion to obtain a metal ion mixed solution, and adding metal nickel salt into a certain amount of deionized water to obtain a metal nickel salt solution; 2) preparing a double-alkaline solution containing hydroxyl and carbonate as a precipitator; (3) slowly dripping the metal nickel salt solution and a precipitator into the metal ion mixed solution by adopting a double titration method, adjusting the pH value to a certain range, and reacting in an oil bath at a certain temperature to obtain a reaction product; and 4) washing the reaction product with water and ethanol, drying, and calcining to obtain the Ni-based catalyst for hydrogen production by ammonia decomposition. The ammonia decomposition hydrogen production catalyst prepared by the preparation method provided by the invention can significantly improve the activity of the catalyst.

The present invention discloses a fibrinogen-based patch, a preparation method and application thereof, wherein the patch comprises fibrinogen and a stabilizer, wherein some lysine residues of the fibrinogen contain hydrophobic groups; and the stabilizer is used to maintain the activity of the fibrinogen. The preparation method comprises: adding a hydrophobic modification reagent dropwise to a fibrinogen solution, performing dialysis after the reaction, and then freeze-drying to obtain the patch. The patch prepared by the method has excellent mechanical strength and adhesion properties, and its performance is significantly better than that of existing surgical adhesive products and emergency hemostasis products under the same conditions. The patch has good biocompatibility, can be absorbed by the human body, and has great potential in clinical applications.

The application discloses an anti-ultraviolet aging polycarbonate modified material and application thereof, and belongs to the technical field of polymer material modification. The material comprises synergistically modified polycarbonate, an organic small-molecule functional regulator, an antioxidant, a light stabilizer, a lubricating dispersant and an inorganic filler, wherein the synergistically modified polycarbonate is constructed into a multiple synergistic network by introducing a borate dynamic covalent structure, a Schiff base structure and a rare earth coordination structure, and the organic small-molecule functional regulator is p-hydroxybenzophenone. The preparation method comprises preparation of the synergistically modified polycarbonate and a subsequent melt blending and extrusion process. Through the technical scheme, the synergistic effect of ultraviolet absorption, energy transfer and free radical inhibition is realized, the yellowing degree of the material is significantly reduced, the mechanical property retention rate and the optical stability are improved, and the material is suitable for the fields of automobile transparent parts, outdoor optical materials and electronic and electrical shell.

The invention discloses a method for preparing an oyster peptide for enhancing immunity, and relates to the technical field of oyster peptide preparation. The method comprises a base, wherein the upper end of the base is symmetrically provided with support columns, the upper end of the support columns is provided with a cover plate, a driving member is provided at the middle position of the upper end of the cover plate, the output end of the driving member penetrates and extends to the lower end of the cover plate, and a rotating block is provided at the output end of the driving member, a positioning component is provided at the lower end of the rotating block, an extraction cylinder is provided at the lower end of the positioning component, and the extraction cylinder is fixed by the positioning component; in the method for preparing an oyster peptide for enhancing immunity, two connecting tubes are located between a grid plate and a fixed plate, and are used for conducting liquid inside the grid plate and allowing the liquid to enter the fixed cylinder, so as to perform secondary screening on the liquid, thereby ensuring good interaction between the solvent and target components in the oyster, avoiding poor stratification effect caused by poor selectivity, and ensuring overall purity and quality.

The invention relates to the technical field of alumina ceramics, and discloses a production process of precision ceramic materials. The invention ball-mills a sulfonated polyvinyl alcohol dispersant and alumina, then pours the slurry into a mold, dries, presses into a green body, and sinters to obtain a precision ceramic material. The sulfonated polyvinyl alcohol dispersant of the invention is used as a dispersant and a binder to perform ball-milling modification on alumina, and sinter to obtain a precision ceramic material. The side chain of the sulfonated polyvinyl alcohol dispersant contains a large number of sodium sulfonate groups, which have a strong interaction with the surface of alumina, so that the polyvinyl alcohol dispersant is coated on the surface of alumina, inhibiting the agglomeration of alumina and improving the dispersibility. At the same time, polyvinyl alcohol can be used as a polymer-based binder to make the alumina particles more tightly and firmly bonded, significantly improving the relative density, compactness and flexural strength of alumina ceramics.

The invention discloses a preparation method and application of a carbon-based single-atom oxygen reduction reaction electrocatalyst, using dopamine functionalized polypyrrole nanoparticles as a skeleton material, ethylenediaminetetraacetic acid and bipyridine as ligands, and forming a multi-level stable loaded complex with Fe-O and Fe-N coordination structure on the skeleton material through dynamic timing ligand regulation, gradual temperature increase and coordination time control, and then the obtained complex-loaded polypyrrole nanoparticles are subjected to 200-300°C low-temperature pre-calcination, corrosive gas etching and 500-900°C high-temperature step-by-step calcination treatment to stably generate FeN4 / Fe2O3 active site structure linked by N-Fe-O bridge bonds, and at the same time obtain a rich pore structure to optimize the contact between electrolyte and active site, and finally prepare a carbon-based single-atom oxygen reduction reaction electrocatalyst. The oxygen reduction reaction electrocatalyst prepared by the present invention exhibits excellent catalytic activity and catalytic stability.

The invention relates to biological glue as well as a preparation method and application thereof. The biological glue comprises the following components: tannic acid, gelatin and polyvinylpyrrolidone, the polyvinylpyrrolidone comprises a mixture of polyvinylpyrrolidone K30, polyvinylpyrrolidone K60 and polyvinylpyrrolidone K90, and the polyvinylpyrrolidone K30 is a mixture of polyvinylpyrrolidone K60 and polyvinylpyrrolidone K90. The biological glue has good biocompatibility and high-strength adhesiveness.