70results about How to "Meet application requirements" patented technology

The invention discloses a band-gap reference circuit which comprises a band-gap reference core module used for superposing a positive temperature coefficient voltage and a negative temperature coefficient voltage to generate a band-gap reference voltage; and the reference output module is used for dividing the band-gap reference voltage to generate a reference voltage. Wherein the band-gap reference core module comprises a temperature excursion trimming unit, the temperature excursion trimming unit is used for trimming the temperature excursion of the band-gap reference voltage by adjusting the positive temperature coefficient voltage, and the reference output module further comprises a temperature excursion compensation unit used for adjusting the voltage division proportion of the reference output module. Therefore, the offset generated in the reference voltage in the temperature drift trimming process is eliminated. According to the band-gap reference circuit, it can be guaranteed that the reference voltage is not affected by the temperature condition, the consistency of the reference voltage can be guaranteed, and the application requirement is well met.

The invention provides a polymer alloy material, a preparation method thereof and a flow cell panel frame, and belongs to the technical field of high polymer materials. The polymer alloy material comprises the following components: 25-80% of polyolefin, 10-20% of engineering plastic, 1-5% of a compatilizer, 5-50% of an inorganic filler and 0.1-5% of an auxiliary agent. Wherein the engineering plastic is selected from one or more of a styrene methyl methacrylate copolymer, a styrene-butadiene methyl methacrylate copolymer, polycarbonate, polyphenyl ether, polyphenylene sulfide, a styrene-maleic anhydride copolymer or a styrene-acrylonitrile copolymer. The polymer alloy material forms a bicontinuous phase structure with'sea-sea 'microscopic dispersion characteristic and tight interface bonding, can simultaneously have the characteristics of excellent heat resistance, corrosion resistance, high flow, low shrinkage, high modulus and the like, and makes up for the defect of insufficient performance of the existing liquid flow cell panel frame plate PP material.

The invention discloses a preparation method of high-oil-resistance nitrile rubber, which comprises the following components in parts by weight: 275 parts of soft water, 50-55 parts of butadiene and 45-50 parts of acrylonitrile, wherein the addition amount of butadiene and acrylonitrile is 100 parts; the emulsifier is a dodecylbenzene sulfonic acid and naphthalene sulfonic acid formaldehyde condensate sodium salt composite system, and the dosage of the emulsifier is 2.5-5 parts; the initiator adopts persulfate, and the use amount of the initiator is 0.1-0.5 part; 0.1 part of triethanolamine; the preparation method comprises the following steps: synthesizing butyronitrile rubber cement by adopting an intermittent feeding mode of replenishing a molecular weight regulator in batches and a thermal polymerization process, adding a terminating agent and an anti-aging agent, and degassing, condensing, washing and drying to obtain a high-strength butyronitrile rubber product. The nitrile rubber has the Mooney viscosity ML (1 + 4) 100 DEG C of 90-120, the tensile strength of more than or equal to 27.5 MPa and the elongation at break of more than or equal to 450%, and can meet the application requirements in the fields of automobiles, aerospace, sealing washers and the like.

The invention discloses modified asphalt concrete and a preparation method and application thereof, and belongs to the technical field of asphalt concrete.The preparation method comprises the steps that sodium silicate, sodium hydroxide and water are stirred and mixed and then transferred into a stirring machine to serve as an alkali activator, and then fly ash, electrolytic manganese residues, cement, modified sugarcane fibers and fine sand are added into the stirring machine to be stirred and mixed; vibrating to discharge internal gas, standing, demolding and crushing to obtain geopolymer aggregate; the modified asphalt, the geopolymer coarse aggregate and the basalt fine aggregate are stirred and mixed in proportion, and the modified asphalt concrete is obtained; the geopolymer aggregate takes the electrolytic manganese residues and the fly ash as main raw materials, the utilization rate of waste resources is increased, and the modified sugarcane fibers are doped, so that the mechanical property of the geopolymer can be improved, and the application requirements of asphalt road aggregate are met. And compared with addition of steel fibers and polymer fibers, the sugarcane fibers are degradable and more environmentally friendly, and dismantling and recycling of temporary asphalt roads are facilitated.

The invention discloses a single-ring absolute time grating angular displacement sensor and an absolute angular displacement value measuring system and method.The single-ring absolute time grating angular displacement sensor comprises a stator base body and a rotor base body, the rotor base body is provided with an induction electrode assembly and a reflection electrode assembly, and the stator base body is provided with an excitation electrode assembly and a receiving electrode assembly; the differential induction electrode assembly and the excitation electrode assembly are connected with the channel selector. The absolute angular displacement value measuring system comprises a single-circle absolute time grating angular displacement sensor with controllable electrode cycle number, a subtraction circuit, a shaping circuit and an FPGA signal processing system. According to the scheme, a single-loop absolute design is adopted, absolute coding of each position in the whole measuring range is achieved, the number of electrode cycles can be flexibly controlled, compared with a double-loop structure, the loop width, the circuit cost and the decoding and coding mode are greatly improved, and meanwhile the industrial use environment adaptability is improved.

The invention relates to the technical field of high polymer materials, and discloses a double-color gradient PVB (Polyvinyl Butyral) film and a preparation method thereof. The double-color gradient PVB film comprises a first surface layer, a sound insulation layer and a second surface layer which are arranged in a stacked mode. In the first surface layer, one side of a breadth center line contains a wedge-shaped gradient layer; the wedge angle of the wedge-shaped gradient layer is close to the width center line of the first surface layer; the breadth of the wedge-shaped gradient layer is smaller than 1 / 2 of the total breadth of the double-color gradient PVB film; the thickness of the wedge-shaped gradient layer is smaller than or equal to the thickness of the first surface layer. According to the double-color gradient PVB film, the design of the pure color area and the gradient color area is formed on the appearance, the light transmittance of the pure color area reaches 25% or below, and the light transmittance of the dark color part of the gradient color area reaches 5% or below; the sound insulation layer is arranged between the first surface layer and the second surface layer, so that the PVB film has sound insulation performance; and the PVB film also has good flexibility and stretch resistance.

The invention discloses a cashew nut shell oil modified phenolic aldehyde amine epoxy curing agent and a preparation method thereof. The cashew nut shell oil modified phenolic aldehyde amine epoxy curing agent is prepared from the following components in percentage by mass: 10-20% of low-molecular fatty amine, 15-30% of formaldehyde, 35-55% of cashew nut shell oil and 15-20% of organic alcohol. Performance detection shows that the cured product has the characteristics of quick drying and high hardness, has toughness and impact resistance similar to those of a polyamide curing agent, is also suitable for low-temperature curing under a normal-temperature curing condition, is low in price and has good curing performance compared with a common phenolic aldehyde amine epoxy curing agent, and is suitable for being used in the field of high-temperature curing. The epoxy resin is mainly suitable for epoxy floor coatings, building structural adhesives and the like.

The invention relates to the technical field of deep processing of natural products, in particular to water-soluble liquid curcumin as well as a preparation method and application thereof. Curcumin is used as a raw material, an antioxidant, a food surfactant and the like are matched, edible ethanol is used as a solvent, and a temperature control crystallization technology is adopted to prepare curcumin compound crystals; and with the curcumin compound crystal as a raw material and a surfactant as an auxiliary material, the water-soluble liquid curcumin which is high in content, good in stability and clear and transparent in solution is obtained by combining technologies such as temperature-controlled emulsification, heat preservation, dilution and the like. The product can meet the requirements on hue, clarity and stability of the curcumin aqueous solution in different application scenes, and is suitable for the fields of food, medicine, cosmetics and the like.

The invention provides a heat sink process and a heat sink assembly, and the process comprises the following steps: S1, carrying out the punching of an AlN-SiC ceramic substrate, obtaining an AlN-SiC ceramic substrate with a blind hole, and filling the blind hole with metal slurry, and obtaining a composite substrate; s2, TiAlN layers are deposited on the two sides of the composite substrate in situ respectively, and a composite substrate is obtained; s3, the side, provided with the blind holes, of the composite substrate is coated with a photoresist layer and patterned, and then a Cu layer, an Ag layer and a graphene / nano-silver composite layer are sequentially electroplated; one side, without the blind holes, of the composite substrate is coated with a heat dissipation insulating layer, and an electroplated plate is obtained; and S4, stripping the photoresist of the electroplating plate to obtain the heat sink assembly. The heat sink assembly obtained by the invention is conductive on one side and insulated on the other side, and has the advantages of good heat dissipation performance and conductivity.

The invention discloses silanized hyaluronic acid as well as a synthesis method and application thereof, and belongs to the technical field of biological material synthesis. The synthesis method of the silanized hyaluronic acid comprises the following steps: dissolving hyaluronic acid in a bio-based solvent to form a hyaluronic acid solution; mixing the hyaluronic acid solution with an amino-containing silane coupling agent, and carrying out a first reaction to form an intermediate reactant; mixing the intermediate reactant with a catalyst, and carrying out a second reaction to form silanized hyaluronic acid; the bio-based solvent is glycerol and / or hexafluorophosphate ionic liquid; the catalyst is an ionic liquid loaded metal oxide. The invention provides the environment-friendly and efficient synthesis method of the silanized hyaluronic acid, and the synthesized silanized hyaluronic acid has higher silicon content, is a water-soluble macromolecule and can meet the application requirements of the silanized hyaluronic acid in cosmetics, health care products and medical auxiliary materials.

The invention discloses a flash evaporation polyolefin conductive film as well as a preparation method and application thereof, and relates to the technical field of flash evaporation breathable films. The preparation method comprises the following steps: calcining a carbon nanotube, modifying with hexadecyl trimethyl ammonium bromide, preparing conductive master batches from the polymer melt A, a coupling agent and the modified carbon nanotube, and preparing the thin film from a spinning solution containing the polymer melt B, the conductive master batches and a spinning solvent through flash spinning equipment. According to the preparation method, the carbon nanotubes can efficiently adsorb hexadecyl trimethyl ammonium bromide to form a molecular wrapping layer, so that uniform dispersion of the carbon nanotubes in a spinning solution is promoted, the conductivity uniformity of the prepared thin film is guaranteed, the carbon nanotubes are of a curled round tube morphology structure, the porosity of the thin film is improved due to dispersion of the carbon nanotubes in the thin film, and the conductivity of the thin film is improved. The air permeability of the film can be highly maintained, and the prepared film is high in conductivity and hydrophobicity, can replace carbon paper to prepare a film electrode gas diffusion layer, and is low in cost.

The utility model relates to a 45-degree oval thoracic cavity curettage spoon, which belongs to the technical field of medical supplies. The utility model discloses handle and harrow hook are connected as an organic whole, the harrow hook includes the harrow hook main part and the spatula who are connected, the spatula is arranged at the front end of the harrow hook main part, the handle is arranged at the rear end of the harrow hook main part, and the spatula adopts oval long groove type design. The utility model has simple and reasonable structure design, is safe and reliable, convenient to operate, can be applied to single-hole and multi-hole thoracoscope, and satisfies the use demand.

The utility model relates to a metal ring antenna structure suitable for wearable equipment, which comprises a PCB mainboard, a metal ring is arranged on the outer ring of the PCB mainboard, a clearance groove with a certain width is reserved between the metal ring and the PCB mainboard, an antenna feed end and an antenna grounding pin are arranged on the metal ring, a first metal elastic sheet and a second metal elastic sheet are arranged on the PCB mainboard, and the first metal elastic sheet and the second metal elastic sheet are arranged on the PCB mainboard. A leading-out pin of an antenna feed end on the metal ring is connected into the PCB mainboard by being connected with a first metal elastic piece, an antenna grounding pin on the metal ring is connected with a second metal elastic piece, and the second metal elastic piece is connected with a single-pole four-throw switch chip on the PCB mainboard through a corresponding circuit and used for switching of different states of the antenna. The working frequency band of the antenna is expanded, and the performance is improved. The antenna provided by the utility model is simple in structure and small in size, and can be very suitably applied to wearable equipment to realize a voice communication function, and the return loss and efficiency parameters of the antenna completely meet the application requirements of the wearable equipment.

The invention provides an unmanned aerial vehicle routing inspection method and system based on semantic guidance and an asset value cost graph, and the method comprises the steps: reasoning a possible distribution region of a target when the target is not directly observed through analyzing the structure law of semantic information, such as an equipment number, a function partition identifier and the like, in a transformer substation; generating a confidence map to guide the unmanned aerial vehicle to efficiently inspect; constructing a semantic cost graph fusing the static asset value and the dynamic operation risk, and quantifying potential loss of different regions when collision or falling occurs; according to the real-time health state of the unmanned aerial vehicle, semantic guidance is emphasized during normal inspection through a dual-guidance function fusion and switching mechanism, and the unmanned aerial vehicle is automatically switched to asset value cost minimization guidance in an abnormal or emergency state to realize safe disposal; the system adopts a framework of semantic reasoning, cost evaluation and flight control module decoupling, and guidance intelligence and control reliability are ensured. According to the invention, the inspection blindness of the unmanned aerial vehicle is obviously reduced, and the abnormality handling risk is reduced.

The invention relates to a light-transmitting cement-based material preparation device and a method for using the same, and belongs to the technical field of light-transmitting cement-based material production equipment, comprising: a bracket; a placement frame, which is vertically arranged on one side of the bracket and suspended in the air, and the placement frame is connected to the bracket; a wire-laying component, which is arranged just above the placement frame and is used to fix optical fibers; a plurality of frame plates, which are horizontally stacked inside the placement frame; a fixing component, which is arranged inside the placement frame and is used to fix the frame plates; a cutting component, which is arranged below the placement frame and is used to cut the optical fibers in a horizontal direction; the invention ensures the standardization of frame construction through the gravity of the frame plates and the optical fibers themselves, and the electric heating riveting plate can not only cut the optical fibers but also form a connection anchor point between the optical fibers and the frame plates, so as to prevent the displacement of the optical fibers during the pouring process and improve the quality of preparing light-transmitting cement-based materials. The invention is simple to operate, easy to use, highly practical, and worthy of promotion.

The invention provides an environment-friendly high polymer material additive as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials, the preparation method comprises the following steps: dissolving beta-cyclodextrin into an anhydrous solvent, adding methacryloyl chloride, controlling the molar ratio of methacryloyl chloride to beta-cyclodextrin to be 1: 1, carrying out substitution reaction, then adding excessive acetic anhydride, and carrying out heat preservation reaction to obtain the environment-friendly high polymer material additive. Carrying out acetylation reaction, and purifying to obtain modified beta-cyclodextrin; adding glycidyl methacrylate, ethylene and modified beta-cyclodextrin into a reaction kettle, and carrying out high-pressure free radical polymerization in the presence of an initiator and a chain transfer agent to obtain the environment-friendly high polymer material additive, wherein the mass ratio of the glycidyl methacrylate to the ethylene to the modified beta-cyclodextrin is (4-8): (88-94): (2-4). According to the prepared additive, the processing rheological property and mechanical toughness of a PCR material are improved, meanwhile, the release characteristic of low-volatility organic compounds is considered, and the application requirements of the fields of automobile interiors and high-end packaging are easily met.

This invention discloses a method for preparing high oil-resistant nitrile rubber. Based on 100 parts by weight of butadiene and acrylonitrile, the mixture includes 275 parts soft water, 50-55 parts butadiene, and 45-50 parts acrylonitrile. The emulsifier is a composite system of dodecylbenzene sulfonic acid and naphthalene sulfonic acid formaldehyde condensate sodium salt, with an emulsifier dosage of 2.5-5 parts. The initiator is a persulfate, with a dosage of 0.1-0.5 parts. Triethanolamine is 0.1 parts. A nitrile rubber paste is synthesized via a thermal polymerization process using a batch feeding method with the addition of a molecular weight regulator. A terminator and antioxidant are added, and the paste is then degassed, coagulated, washed, and dried to obtain a high-strength nitrile rubber product. This nitrile rubber exhibits a Mooney viscosity (ML). (1+4) 100℃ With a strength of 90-120, tensile strength ≥27.5MPa, and elongation at break ≥450%, it can meet the application requirements of automobiles, aerospace, gaskets and other fields.

The present invention relates to the technical field of electronic ceramic substrate materials, and more specifically, to a tape casting slurry, a green porcelain tape and a preparation method thereof. The tape casting slurry of the present invention is made of component A, component B and component C, wherein component A comprises: calcium borosilicate glass powder; component B comprises: solvent, binder, plasticizer and dispersant; component C comprises: one or more of acrylic adhesive, alkane mixture, pre-dispersant and auxiliary agent; the mass ratio of component A, component B and component C is 100:(50-150):(0.02-20). The tape casting slurry provided by the present invention has moderate viscosity and good fluidity, and can obtain a green porcelain tape with uniform film thickness and smooth surface.

The invention discloses a carbon fiber reinforced soybean protein adhesive as well as a preparation method and application thereof, the adhesive comprises modified carbon fibers and a soybean protein matrix, and the modified carbon fibers are dispersed in the soybean protein matrix; the surface of the modified carbon fiber is rich in at least one active functional group of hydroxyl, carboxyl or epoxy group. According to the adhesive, the modified carbon fibers are combined with the soybean protein matrix, the bonding strength of the adhesive is enhanced, and when the adhesive is used for bamboo product bonding, the mechanical strength of bamboo products is improved, and the service life of the bamboo products is prolonged.

The invention relates to a low-smoke halogen-free material for a B2ca high-flame-retardant high-flexibility cable and a preparation method of the low-smoke halogen-free material. The raw materials comprise 30-50 parts of POE resin; 10 to 20 parts of metallocene polyethylene; 10 parts of a flame-retardant plasticizer; 10 to 20 parts of a flame retardant PPO; 50 to 100 parts of flame retardant phosphorus nitrogen; 50-100 parts of a flame retardant magnesium hydroxide; 0.3 to 0.5 part of an antioxidant; 15-20 parts of a shell forming agent; and 1 part of an auxiliary agent. The preparation method comprises the steps that all the raw material components are put into an internal mixer according to the proportion to be heated and pre-stirred, the temperature of the internal mixer is controlled to range from 170 DEG C to 180 DEG C, and the internal mixing time ranges from 15 min to 20 min; feeding the internally mixed and clustered micellar cones into a double-screw granulator for extruding and granulating, wherein the heating temperature of each section of the double-screw granulator is equally divided from 150 to 120 DEG C according to the number of heating sections; and extruding and granulating to obtain the material. The cable has the advantages of being flexible, easy to bend, good in insulativity, low in heat release amount and the like.

This invention discloses a semantic understanding method and engine based on multi-model collaborative reasoning and self-supervised learning, belonging to the fields of natural language processing and artificial intelligence. The method includes preprocessing input data to extract semantic features; intelligently scheduling at least two models from a large language model, task-oriented model, and rule engine for collaborative reasoning through a dynamic routing module based on multi-level policies and meta-learning networks; using a multi-model fusion module to perform hierarchical fusion and conflict resolution of the reasoning results, outputting the final semantic understanding result; and continuously optimizing the system through feedback learning. A self-supervised pre-training task is used to learn a general semantic representation from unlabeled data to enhance the model's generalization ability. The engine includes core modules such as input processing, dynamic routing, multi-model fusion, feedback learning, model repository, and monitoring and security, which work together to implement the above method. This invention achieves high-precision, high-efficiency, and adaptive semantic understanding.

The application provides a monolithic adsorbent based on 3D printing technology. The application selects halloysite nanotubes and hydroxypropyl methyl cellulose as binders. The halloysite nanotubes have excellent high-temperature resistance, hardness and durability, and chemical stability, and can meet the application requirements of the catalyst under high-temperature complex working conditions, so that the catalyst structure remains mechanical stability. The hydroxypropyl methyl cellulose has processability and plasticity, and can help to print complex shapes and structures. The super strong bonding force and interlayer adhesion can effectively bond the printing materials, ensure the firmness and stability of the interlayer adhesion in the printing process, and help to reduce the distortion and deformation in the printing process. The monolithic passive NO x adsorbent provided by the application has a simple and feasible preparation method, is a non-noble metal adsorbent with economic benefits, and can be connected in series with a downstream SCR treatment unit to realize ultra-low emission in the NOx cold start stage.

The invention discloses an azeotropic composition containing environment-friendly insulating gas trans-1, 1, 1, 4, 4, 4-hexafluoro-2-butene and application of the azeotropic composition, and relates to the field of insulating gas. The azeotropic composition comprises a gas 1 and a gas 2, the gas 1 is trans-1, 1, 1, 4, 4, 4-hexafluoro-2-butene, the gas 2 is perfluorobutane, and the azeotropic composition can be used as an insulating medium to be applied to the field of electrical equipment. The gas azeotropic system formed by the gas 1 and the gas 2 in a specific ratio has a lower liquefaction temperature than a single gas and has a lower liquefaction temperature than gases such as perfluoropentanone, the azeotropic composition can be kept in a gaseous state at normal temperature or cold conditions, the operation cost of power equipment is reduced, the GWP is low, and the gas azeotropic composition is suitable for industrial production. The insulating strength can meet application requirements, and the application field is widened.

The invention discloses a PVC / polyester composite outer sheath material for a high-shielding cable and a preparation method thereof, and relates to the technical field of cables, the outer sheath is prepared from the following components by weight: 100 parts of PVC, 30-50 parts of polypropylene glycol adipate, 20-40 parts of an inorganic filler, 4-12 parts of modified conductive carbon black, 1-3 parts of a stabilizer, 1-3 parts of an antioxidant, and 0.5-2 parts of a silane coupling agent; the material has excellent electromagnetic shielding performance and mechanical strength, and also shows good weather resistance and corrosion resistance; the processing window is wide, and the processing performance is excellent; according to the invention, various performances are ensured, the addition amount of the conductive filler is reduced, the production cost is effectively reduced, various technical requirements of the high-shielding cable can be met, and the high-shielding cable has important application value.

The utility model discloses a kind of power line communication noise suppression device and power line communication system, including power line transmitting end module and power line receiving end module;Power line transmitting end module includes the double-stage encoding unit connected in turn, multiplexing modulation unit, mixed noise suppression unit;Double-stage encoding unit includes first stage encoder and second stage encoder, and first stage encoder is Turbo encoder, and second stage encoder is RS encoder;Multiplexing modulation unit includes orthogonal frequency division multiplexing modulator;Power line receiving end module includes iterative decoding unit, and iterative decoding unit includes soft output Viterbi algorithm decoder.The utility model is by designing a kind of fusion based on Turbo encoder and RS encoder double-stage encoding unit and based on soft output Viterbi algorithm decoder iterative decoding unit, and apply the noise suppression device of orthogonal frequency division multiplexing modulator, improve the anti-noise ability of power line communication, optimize the performance of power line communication system.

This invention provides a silicone / polyurethane / epoxy resin composite emulsion, its preparation method, and its application. It is prepared by the following steps: (1) after dehydration of polyethylene glycol and hydroxyl silicone oil, diisocyanate is added, and the mixture is heated to prepare a silicone / polyurethane prepolymer; (2) a hydrophilic chain extender is added to continue the reaction, resulting in a hydrophilic silicone / polyurethane prepolymer; (3) a diluent and epoxy resin are added, and the reaction yields a silicone / polyurethane / epoxy resin composite resin system; (4) a neutralizing agent is added after cooling; (5) water is added under high-speed stirring to form a silicone / polyurethane / epoxy resin composite emulsion; (6) the diluent is removed by vacuum distillation. The silicone / polyurethane / epoxy resin composite emulsion provided by this invention, when combined with a water-based curing agent, can be used to reinforce glass fiber filter media for lubricating oil filtration. The reinforced filter media can meet the requirements of pleating processes and high-temperature lubricating oil applications at 220℃.

The invention discloses an aircraft pallet locking device which is applied to the technical field of air freight and comprises a lock box, a rolling rod is installed on the front portion of the lock box, a spring bolt is installed on the rear portion of the lock box through a hinge shaft, connecting rods are arranged on the two sides of the spring bolt, and the spring bolt is connected with the two connecting rods through the hinge shaft. A large torsion spring is arranged on one side of the spring bolt, two supporting arms are arranged on the front side of the spring bolt, the side, close to the supporting arms, of the connecting rod is rotationally connected with the supporting arms, supporting arm shafts are installed in the supporting arms, and the supporting arms are connected with the lock box through the supporting arm shafts. The over-dead-point connecting rod mechanism is adopted, and the torsion spring is combined for assisting, so that two use states of locking and unlocking can be realized; the manual handle and the electric steering engine can be switched as required, so that the switching between manual locking and unlocking and automatic locking and unlocking of the device can be met; and the application requirements of the device in different environments are met.

This application discloses a method for forming a part, the method comprising: obtaining a first digital model and a first filling molding parameter based on a target part; obtaining a first part sample based on the first digital model and the first filling molding parameter; obtaining a density value and elongation of the first part sample based on the first part sample; if both the density value and elongation of the first part sample meet a preset threshold, then using the filling molding parameter corresponding to the first part sample as a second filling molding parameter; obtaining a second part sample based on the first digital model and the first printing molding parameter; obtaining a surface roughness value of the second part sample based on the second part sample; if the surface roughness value of the second part sample meets a preset threshold, then using the printing molding parameter corresponding to the second part sample as a second printing molding parameter; and obtaining a target part based on the second filling molding parameter and the second printing molding parameter.

The invention relates to the technical field of metal powder preparation, in particular to silver powder for a conducting ring brush body material and a preparation method and application of the silver powder. The silver powder is prepared through an electrolytic method. The method comprises the steps that firstly, silver nitrate and pure water are prepared into a silver nitrate solution according to a certain proportion; adjusting the pH value of the silver nitrate solution, adding carbamide and other additives according to a certain proportion, and controlling the temperature of the silver nitrate solution; and by taking the silver nitrate solution as an electrolyte, adjusting electrolysis parameters such as current, voltage and powder brushing period in the electrolysis process to obtain the granular silver powder with the particle size D50 of 2-15 microns and the purity of 99.999% or above. The silver powder prepared through the method is high in purity, uniform in silver particle and good in dispersity, an alloy material prepared through the silver powder is smooth in surface, silver is evenly distributed in a metallographic phase, and the silver powder is suitable for the field of silver-based contact materials such as aerospace conducting ring brush bodies and silver bonding wires.

A performance analysis method for an electric transmission system of a pure electric mining dump truck comprises the following steps: 1, checking a model selection result of a power transmission component: checking the maximum traction braking power and the maximum traction braking torque of a vehicle motor according to road conditions and vehicle parameters of vehicle operation, and drawing an operation characteristic curve; 2, traction gear shifting logic performance analysis: according to the running road condition of the vehicle, the lowest gear of the gearbox under the maximum climbing torque of the gearbox is matched, and gear shifting performance analysis of traction climbing of the gearbox is completed; 3, brake gear shifting logic performance analysis: according to the running road condition of the vehicle, matching the highest gear of the gearbox under the maximum downhill torque of the gearbox, and completing downhill gear shifting performance analysis of the gearbox; 4, traction efficiency analysis: according to the gear shifting logic in the step 2, calculating a common rotating speed interval of each gear and comparing the common rotating speed interval with a motor efficiency map; and 5, brake efficiency analysis: according to the gear shifting logic determined in the step (3.7), calculating a common rotating speed interval of each gear and comparing the common rotating speed interval with a motor efficiency map.