325results about How to "Guaranteed fineness" patented technology

The invention provides a lead-free silver conductive paste used for positive electrode of solar battery and a preparation technique thereof. The paste comprises the following materials by weight percentage: 65 to 85 percent of silver powder, 2 to 8 percent of lead-free glass powder, 10 to 25 percent of organic carrier and 0.1 to 3 percent of additive. The paste adopts the lead-free glass powder of Si-B-Bi-Al-Ti-Zn-O series to replace the traditional lead-bearing glass powder; and the series glass powder has lower softening point, can lead the silver electrode to have good adhesive force after sintering, and ensures the silver electrode to be well contacted with a silicon substrate. In addition, zinc resinate is used as the additive in the invention, not only can well improve the printing performance of the paste, but also can improve the electrical property of the electrode.

The present invention relates to a photocurable material for 3D inkjet printing, and a preparation method thereof, and a printing method, wherein the photocurable material comprises, by weight, 50-98 parts of a monofunctional monomer, 1-50 parts of a linear nonionic water-soluble polymer, 0-20 parts of a polar organic solvent, 0.1-5 parts of a photoinitiator, and 0.5-10 parts of an auxiliary agent. According to the present invention, the photocurable material can be used for 3D inkjet printing so as to print the support part, wherein the support part can be removed in the water or the aqueous liquid so as not to affect the precision of the target 3D object; and the 3D printing method has advantages of simple in operation, energy saving, and no harm to human body.

The invention discloses a region-division-based three-dimensional reconstruction method for a texture image. The method comprises the following steps: reading texture image information, performing region division on the texture image to obtain texture division regions, and performing region grouping; calculating height values of pixels in the texture image to obtain three-dimensional texture points of the pixels in the texture image by adopting a method of shape from shading; calculating the color roughness of each texture division region, determining the sizes of triangular meshes of different division regions, reconstructing a triangular patch of each division region, and converting the texture image into a three-dimensional texture graph to realize the three-dimensional reconstruction of the texture image. According to the method, the microscopic three-dimensional geometric shape of the surface of a virtual object reflected by the texture image is better reconstructed; microscopic details of the texture image are ensured, and complexity in the three-dimensional reconstruction of the texture image is further lowered; different physical attributes can further be endowed to different regions according to region grouping, so that a foundation is laid for the tactile sensation of the texture image.

The invention discloses dual-purpose printing equipment with the functions of transfer printing and direct printing. The equipment consists of a preprocessing device and a printing device, wherein the preprocessing device consists of a reticulate pattern roller (45) and a bearing roller (46); the printing device consists of a front main roller and a rear main roller, and each main roller is matched with printing plate rollers, roller barrel washing devices and roller barrel drying devices. The dual-purpose printing equipment disclosed by the invention adopts integrated dual-purpose design with the functions of the transfer printing and the direct printing and can meet requirements for low cost and high speed of the direct printing, and the dual-purpose printing equipment can also meet requirements for high fineness of the transfer printing.

The invention discloses a display panel and a display device, and the display panel comprises a first display area which comprises a plurality of first repeating units arranged in an array; a second display area which comprises a plurality of second repeating units arranged in an array mode, wherein the first repeating units and the second repeating units each comprise a plurality of sub-pixels, the density of the sub-pixels of the second display area is smaller than that of the sub-pixels of the first display area, and the second repeating units and the first repeating units are the same in outline shape. According to the display panel provided by the embodiment of the invention, the pixel density of the second display areas is relatively reduced, so that the array wiring in the second display area is reduced, the diffraction phenomenon of the wiring to incident light is reduced, the integration of the photosensitive module at the second display area is facilitated, and the non-display area of the display panel is reduced. The second repeating units and the first repeating units are the same in outline shape, so that the sub-pixels in the first display area and the sub-pixels in the second display area can be formed by using the same mask plate, and the design cost is reduced.

The invention discloses a crystalline silicon solar cell front silver paste and a preparation method thereof. The front silver paste comprises the following components in percentage by weight: 85-90%of silver powder, 5-10% of an organic carrier, 5-10% of an organic carrier, 1.5-5% of composite glass powder, and 0.05-1% of a silver paste additive. The silver powder in different particle size distribution is cooperatively used, the slurry is good in ink permeability, and the silver powder particles in the grid line are more uniformly and tightly filled, so that the sintering density of the gridline is facilitated, the resistance of the grid lines is reduced, and the photoelectric conversion efficiency is improved. The preparation process of the glass powder is simple, the control is facilitated; the glass powder with different components is compounded and used, so that a series of particles are uniform, the softening temperature is low, and the composite glass powder has good wettability to the silver powder and the silicon substrate, a front silver paste prepared from the composite glass powder is sintered on the front surface of the cell, the silver electrode and the silicon havegood ohmic contact and welding performance, and the adhesion strength of the electrode is high.

The invention provides a video recommendation method based on a user head portrait and a video recommendation system based on user head portrait. Combined training is performed according to the standardized head portraits of massive users and the watched video data so as to obtain a convolutional neural network model based on image representation. The possibly interested videos of the users can beautomatically learnt according to the head portraits uploaded by the users so that the problem of video recommendation of the cold start users can be effectively solved. Meanwhile, feature vectors obtained by vectorization processing of the semantic vectors outputted by the trained convolutional neural network model and the basic information of the users and the feature information of the presetmultiple candidate recommendation videos are inputted to the recommendation system to be processed. The machine learning result based on the user images, the basic information of the users and the features of the candidate recommendation videos are simultaneously considered so that the accuracy and the fineness of the recommendation videos for the users finally obtained by the recommendation system can be guaranteed.

The present invention relates to the preparation process of one kind of superfine green tea powder. The preparation process includes spreading fresh tea, steam deactivating enzyme, hot blast dewatering, kneading, re-drying, coarse crushing and final superfine crushing. The steam deactivating enzyme and the hot blast dewatering reduce the water content of tea to 58-62 %, and kneading has one cell breaking rate of 10-15 %. The said preparation process can maintain the emerald of tea, and has fast water elimination and reduced loss of tea inclusion.

The invention belongs to the technical field of novel materials, particularly relates to a novel anti-radiation material and gloves made from the novel anti-radiation material, wherein the novel anti-radiation material comprises components with weight by percentage: nanometer bismuth oxide 55-73%, aluminum fluoride 20-35%, lanthanum trioxide 3-10%, nano tungsten trioxide 3-10%, fuller alcohol nanoparticles 1-2%. Anti-radiation gloves are prepared by adding the novel anti-radiation material into raw materials of latex gloves, and the novel anti-radiation material can keep flexibility and malleability of the latex gloves, and guarantees operation elaboration and safety of operators.

A novel graphene slurry modified epoxy-zinc powder anticorrosion coating and a preparation method thereof. The anticorrosion coating includes epoxy resin, graphene-epoxy resin slurry, metal zinc powder, functional filler, and other functional additives. By preparing the graphene-epoxy resin slurry having high dispersibility and electric-conductivity, a phenomenon of aggregation due to direct addition of graphene is effectively solved and usage amount of zinc powder is meanwhile reduced. By compounding the slurry with the epoxy resin and functional filler, dispersibility of graphene in the coating is improved. According to the preparation method, by combination of sand milling and high-speed dispersion, stable dispersion of the graphene in the coating is achieved, and fineness of the coating is guaranteed, so that the coating, compared with a conventional epoxy zinc-rich coating, the coating has good adhesion force, excellent anti-salt fog performance and outstanding anticorrosion performance. Compared with the conventional epoxy zinc-rich coating, the anticorrosion coating is greatly reduced in content of zinc powder, can reach 4000 h in anti-salt fog performance, is higher than 8MPa in adhesion force, and has extensive application prospect.

The invention belongs to the field of processing agricultural products, in particular to a method for processing golden mushroom root powder. In the method, fresh golden mushroom roots serving as a raw material undergo boiling, dehydration, drying, grinding and sterilization to prepare the golden mushroom root powder, wherein in the drying step, the two-step drying method is adopted, so that the golden mushroom roots can be fully dried without damaging nutritive matters. The method has the advantages that: the golden mushroom roots which are discarded in the processing of golden mushrooms are used as a raw material, the waste golden mushroom roots are recycled, the source is wide, and the cost is low; and by processing the golden mushroom roots into the golden mushroom root powder, the wastes are changed into the valuables, and the problem that the discarded golden mushroom roots pollute the environment is solved.

The invention relates to a method for preparing bean curd sheet rolls, wherein it comprises that using one time of grinding, two times of filters, additive composite phosphate, to improve yield and quality, and continuous feeding material to improve the ratio of first bean curd sheet rolls in shade yellow, using sealed far-infrared drier to replace traditional wind drying method, to obtain high dry speed.

The invention relates to a preparation method of ultrafine magnesium-based rare earth hexaaluminate powder, which comprises the following steps: (1) preparation of precursor colloid: a, uniformly mixing an aluminum salt solution, a magnesium salt solution and a rare earth solution in a certain proportion; and b, adding the mixed solution obtained in the step a into ammonium hydroxide, stirring the obtained mixture, keeping the pH value of the obtained mixture not less than 12, and standing for ageing, so that the precursor colloid is obtained; (2) impurity removal: carrying out centrifugal solid-liquid separation on the obtained precursor colloid, washing and concentrating the obtained object, so that wet precursor gel is obtained; (3) drying: drying the wet precursor gel, so that precursor powder is obtained; and (4) heat treatment: calcinating the precursor powder, so that ultrafine magnesium-based rare earth hexaaluminate powder is obtained. The method is low in sintering temperature, the purity of the obtained powder is high, and the obtained powder can achieve nanoscale without being processed, the preparation process is simple, and required equipment is simple, therefore, the method is suitable for large-scale industrial production.

The invention provides a production process for flour paste. The process comprises the following steps: 1, material steaming: a step of adding water into the raw material flour, steaming the flour with vapor, delivering steamed flour to a koji-making pool and spreading the flour so as to cool the steamed flour; 2, inoculation: a step of adding a starter into the steamed flour and carrying out inoculation; 3, koji making: a step of putting a koji material into a koji material tank, heating the koji material after static culture, then carrying out ventilation to prepare koji, carrying out culture for 15 to 17 h and then taking the prepared koji out when the koji material is full of mycelia and generates yellowish green spores; 4, insulated speedy brewing after mixing of the koji: a step of transferring the fermented koji material into an insulated fermenting tank, adding a saline solution, allowing the koji material to be uniformly soaked by the saline solution, using steam to heat a water bath tank and turning the fermented flour over once a week; 5, primary grinding; 6, drying in the open air; and 7 secondary grinding. The production process provided by the invention adds the stepof insulated speedy brewing; compared with a later open-air drying step which lasts for 9 to 10 months in traditional methods, the insulated speedy brewing step which lasts for 1 month and the open-air drying step which lasts for 3 months in the invention enables the whole process to be decreased by 6 months, and therefore, occupation of the fermenting tank and capital is reduced while product quality is guaranteed.

The invention provides a hard pure gold material for pure gold jewelry. The hard pure gold material is prepared from, by mass, 0.1-0.4% of calcium, 0.5-0.8% of titanium, 0.01-0.1% of rare earth elements and the balance gold, wherein the gold content is 99.0% or above. In the preparation process, by introducing the trace element calcium, a dispersed cluster structure is formed in a pure gold matrix, and the structure can effectively promote precipitation of a nano-scale gold titanic compound strengthening phase, so that the hardness and strength of the pure gold are greatly improved. The pure gold in the design is suitable for conventional jewelry processing processes and can be applied to various kinds of pure gold jewelry.

The invention discloses an efficient environment-friendly crusher for food processing. The crusher comprises a machine body; a feed port is formed in the upper side of the machine body; a feed hopper is arranged on the upper side of the machine body; the bottom end of the feed hopper is connected with the feed port; slide rails are respectively arranged on the front and back two sides of the bottom end in the feed hopper, and are slidingly connected with an adjusting plate; the top end of the adjusting plate is horizontally connected with a cover plate; a cylinder is arranged at the right end of the upper side of the machine body; and the bottom end of the cylinder is fixed on the upper surface of the machine body through a fixed frame. The efficient environment-friendly crusher for food processing can control the feed quantity to prevent blockage and to reduce the working load, is excellent in crushing effect, high in efficiency, sufficient in crushing and uniform in particle size of crushed materials, guarantees the material quality, realizes automatic discharge through extraction by an extractor, has no dust spill in the discharge process, protects the environment, and improves the working environment of operators.

The invention relates to the field of farming machines, in particular to an efficient deep ploughing machine tool with controllable ploughing depth. The efficient deep ploughing machine tool comprises a rack and a rotary tillage mechanism installed on the rack. Plough share sets with adjustable wedge-in angles are arranged on the portion, in front of the rotary tillage mechanism, of the rack in rows. The rack is connected to the tail of a tractor through an upper connecting rod and a lower connecting rod, a quadrilateral structure capable of moving in the vertical direction is formed by connecting parts of the rack and the tractor, and a jacking hydraulic cylinder is arranged in the middle of the quadrilateral structure. One end of the jacking hydraulic cylinder is connected to the position, close to an upper connecting rod connecting point, of the rack, and a cushioning device is arranged at the connecting end. The other end of the jacking hydraulic cylinder is connected to the tail of the tractor, and a stable triangular structure is formed by the jacking hydraulic cylinder and the upper connecting rod. By the adoption of the scheme, the efficient deep ploughing machine tool with controllable ploughing depth is simple in structure and convenient and rapid to operate, can effectively control the ploughing depth, and efficiently completes ploughing work at high quality.

The invention discloses a processing method of green tea powder. The method comprises the following steps: selecting materials, carrying out fixation by steam, rolling, drying, performing coarse grinding and superfine grinding. The tea is pretreated by fixation by steam, activity of oxidase is rapidly passivated, tea cells are crushed after the reasonable rolling, so that water of the tea is extruded of surface of the tea, the water loss is accelerated, and loss of nutrient substances in tea is reduced, the original nutritional ingredients, pharmacological ingredients, and natural color of raw materials are kept to the greatest extent for the processed green tea powder through a manner of combining coarse grinding and superfine grinding, so that the green tea powder has good dispersibility, and the fineness of the green tea powder is guaranteed.

The invention relates to a cold zinc-sprayed anticorrosion coating doped with modified graphene. The cold zinc-sprayed anticorrosion coating is prepared from, by weight, 50-80 parts of the modified graphene, 10-15 parts of polypropylene vinyl acetate, 20-38 parts of epoxy resin, 70-210 parts of zinc powder and 17-40 parts of talcum powder. The modified graphene is obtained in the mode that ion exchange is conducted to exchange vinyl benzyl in imidazole into the edge portion of grapheme, then polymerization with methylacrylic acid armour is conducted, and the obtained graphene polymethyl methacrylate composite material is the modified grapheme. The cold zinc-sprayed anticorrosion coating is applicable to offshore wind power facility protection in a marine environment, or used for long-term anticorrosion of onshore steel structures of inland tube diameters.

The invention relates to a hand-operated drug mill which comprises a milling groove and a milling disc, wherein the milling groove is arc-shaped long groove; the milling disc is a disc with a central opening; a milling disc shaft is mounted in the opening of the milling disc in a penetrating manner; the milling groove is arranged on the base; two guide plates are arranged on two sides of the milling disc on the base respectively; an arc-shaped guide sliding hole is formed on each of the guide plate and fits the shape of the milling groove; the two end parts of the milling disc shaft are mounted in the arc-shaped guide sliding holes on two sides respectively in a penetrating manner; a hand-operating handle is fixedly connected with one of the two end parts; a plurality of compression springs are arranged between the bottom end of the milling groove and the base. The hand-operated drug mill has the advantages of simple structure, time-saving labor-saving operation and good drug-milling effect.

The invention discloses PPS with a low dielectric coefficient, and relates to the technical field of plastics. The PPS is prepared by the following steps: particles of a PPS toughening agent are ground into powder by a material grinding machine, then sieving is performed by using a high-density sieve, and sieved toughening agent powder is retained for standby application; after the material is processed, PPS resin, hollow glass microbeads, the PPS toughening agent powder and low-dielectric-coefficient glass fibers are added into a high-speed material-mixing machine in proportion, and mixing isperformed; and after the mixing is completed, the material is taken out and put into a plastic extruding machine, and extrusion molding is performed. The PPS with the low dielectric coefficient provided by the invention has excellent high-temperature resistance and mechanical properties, and shows stable dielectric properties in a wide range from -40 to 120 DEG C; and the PPS is utilized as a substrate, the dielectric coefficient is reduced to less than 3 to meet market demand by means of a modification manner (that is, cooperation of the hollow glass microbeads, the low-dielectric-coefficient glass fibers and the PPS toughening agent is utilized), at the same time, good toughness and strength are maintained, and the high-temperature resistance is strong.

The invention relates to ball-milling classification production equipment for high-purity quartz powder. The ball-milling classification production equipment comprises a lifting machine, a material bin, a belt material feeder, a ball mill, a classifier I, a classifier II, a material return spiral device, a dust remover, a draught fan and an air compressor, wherein the lifting machine is connected with a material inlet of the material bin; the belt material feeder is positioned on the lower surface of the material bin; a material outlet of the material bin is connected with the bet material feeder; a material inlet of the ball mill is positioned in the lower surface of the belt material feeder and is also connected with one end of the material return spiral device; a material outlet of the ball mill is connected with the classifier I; the other end of the classifier I is connected with the classifier II; the lower part of the classifier I is connected with the other end of the material return spiral device; the other end of the classifier II is connected with the dust remover; the draught fan is arranged on the dust remover. The ball-milling classification production equipment can guarantee the fineness and the purity of the quartz powder and can reduce the energy consumption and increase the yield.

The invention discloses a method of using a three dimensional reconstruction imaging technology to analyze the structure of root tip cells of arabidopis thaliana, and belongs to the field of cell structure analysis. According to the method, roots of arabidopis thaliana are subjected to a horizontal freezing slicing treatment to obtain root cross sections, which only contain the root caps, the thickness of the slice is only 10 [mu]m, and thus the influence of the resolution ratio of the Z axis of a microscope on the imaging reality is greatly reduced; by optimizing the conditions of microscopic photography, the shooting stepping is minimized to less than 0.4 [mu]m, the Pinhole value is reduced so as to ensure that the thickness of a calculated optical slice is less than 0.8 [mu]m, the fineness of the photos is guaranteed; the scanning range comprises the whole structure of a stele cell from top to bottom; a finer microscopic imaging picture can be obtained, the influence of stray light of non-focal planes on the images is effectively reduced, the image resolution ratio is improved, the structure of a studied object can be realistically represented; and by using the provided three dimensional reconstruction imaging technology, the intra-cell endoplasmic reticulum structure can be determined more directly and accurately.

The invention discloses a two-segment mineral grinding-classification process, it grinds the bauxite and lime in the rod mill, the grinded raw mine pulp is poured into a pump pool. The classified bottom flow after classified by water swirler is grinded in ball grinder, adjusts the best liquid and solid rate with proper alkali liquid, the discharged mine pulp is poured into the same pump pool, and adds in alkali liquid to maintain the solid content at 470-520g / L, and carries on classification to the compound mine pulp in the water swirler, the bottom flow enters the ball grinder to be grinded.

The invention discloses coated kraft paper and a production technology thereof. The coated kraft paper comprises a coated layer, a surface layer, a core layer, a bottom layer and a starch gluing layer, wherein the coated layer, the surface layer, the core layer, the bottom layer and the starch gluing layer are sequentially stacked together; the surface layer is bleached chemical wood pulp; the bleached chemical wood pulp comprises the following ingredients in percentage by weight: 20%-80% of bleached chemical hardwood pulp and 20%-80% of bleached chemical needle pulp; the core layer is mixed pulp; the mixed pulp comprises the following ingredients in percentage by weight: 30%-70% of ecru pulp and 30%-70% of mechanical pulp; and the bottom layer is 100% of ecru pulp. Because the coated kraft paper is manufactured by a three-layered net, 100% of native wood pulp is used, a front surface of the coated draft paper is a coating layer, the back surface of the coated draft paper is the starch gluing layer, the proportion of long fibers and short fibers of the pulp is reasonable, an efficient technological control means is adopted, and the strength of paper and the tenderness of paper surfaces can be guaranteed simultaneously.

The invention discloses a three-dimensional model rendering method and device, equipment and a storage medium, and belongs to the field of computer graphics. The method comprises the following steps: in an offline calculation stage, acquiring user input data; according to the user input data, performing view angle range division for a target three-dimensional model in a three-dimensional space to obtain at least two view angle regions; obtaining a triangular visible set of the target three-dimensional model in different view angle regions; constructing an index buffer region according to the triangular visible sets of the different view angle regions, wherein the index buffer region is used for storing vertex indexes of triangles in the triangle visible sets; in a real-time rendering stage, determining a target subinterval in the index buffer region according to a current view angle; and rendering the target three-dimensional model according to the triangular visible set corresponding to the target subinterval. The rendering performance of a graphic product can be optimized.

The invention provides a processing technology and method of high-quality flour. The processing technology and the method comprise the following steps of material selecting and washing, dampening and wheat wetting, rough grinding and screening, and accurate grinding and screening. Wheat is treated by various procedures, original nutritional ingredients are kept in the ground flour and are not broken, the production process of the flour is effectively improved, and the nutritional ingredient loss during the processing and production process of the flour is greatly reduced, thereby further improving the taste quality of the flour; the processing technology and the method are suitable for being further popularized.

The invention discloses a making method of a UV (ultraviolet) reverse dull polish process. A UV offset ink disclosed by the invention comprises reverse bottom oil and reverse surface oil, wherein thereverse bottom oil comprises the following components in parts by weight: 25-35 parts of a polymerism prepolymer A, 40-60 parts of a light sensitive monomer, 5-15 parts of a light initiator A, 5-15 parts of a filling material and 5-10 parts of an additive A; and the reverse surface oil comprises the following components in parts by weight: 15-25 parts of a polymerism prepolymer B, 55-70 parts of an active diluent, 5-15 parts of a light initiator B and 1-10 parts of an additive B. By preferring components and proportions of the reverse bottom oil and the reverse surface oil, the components arematched with one another, original viscosity, fineness, 4-cup coating viscosity and drying properties of the prepared reverse bottom oil and reverse surface oil can be maintained, in addition, the contact adhesiveness of the oil with a common offset ink product is greatly improved, and a UV reverse dull polish effect can be directly achieved on the common offset ink product.

The invention discloses a production method of PS plate interleaving paper. The production method comprises the process steps as follows: respective beating of softwood pulp and hardwood pulp, pulp blending and addition of auxiliary materials, wet paper sheet making, pre-drying, surface sizing, after-drying, calendaring and finishing. Through research of pulp selection, pulp proportioning, a beating process and addition of functional chemical assistants to the pulp, adoption of film transfer surface sizing treatment as well as integration of finishing measures such as a soft calendaring equipment and the like, production of qualified PS plate interleaving paper is executed according to related paper machine parameters, and the method has great significance in optimization of product structure for a company and improvement of profitability of the company.