23results about How to "Improve structural properties" patented technology

The invention provides a biochar loaded sulfur modified zero-valent iron material and application thereof in groundwater remediation, and particularly relates to the technical field of inorganic materials. According to the biochar-loaded sulfur-modified zero-valent iron material, sulfur-modified zero-valent iron is loaded in a porous structure of biochar; the sulfur modified zero-valent iron has a core-shell structure; wherein the inner core of the core-shell structure is zero-valent iron, and the outer shell of the core-shell structure is iron sulfide. According to the biochar-loaded sulfur-modified zero-valent iron material provided by the invention, a sulfide layer is formed on the surface of zero-valent iron, so that a zero-valent iron core is prevented from being in direct contact with water or dissolved oxygen, and the durability of the zero-valent iron core is improved. Delocalized electrons in the sulfide layer promote the electron transfer process, and the catalytic performance of the material is enhanced. The biochar loaded sulfur modified zero-valent iron material provided by the invention is high in stability and wide in application range. Due to the multifunctionality of the material, the material has potential application value in a plurality of fields such as environmental restoration and pollutant degradation.

The invention belongs to the technical field of resource utilization of engineering residue soil, and particularly discloses an adjustable backfill material based on low-viscosity fine-grained soil and a preparation method of the adjustable backfill material. The adjustable backfill material comprises the following components in percentage by mass: 65-85% of low-viscosity engineering waste soil, 5-10% of a high-strength curing material system, 0-1% of a fluidity promoting material system, 0-1.5% of a compactness reinforcing material system and 5-25% of water, wherein the sum of the percentages of the components is 100%. According to the backfill material, low-viscosity fine-grained soil serves as base soil, three different material systems including a high-strength curing material system, a fluidity promoting material system and a compactness enhancing material system are doped, and cured soil with the properties of high fluidization, self-compaction, controllable strength, low permeability and the like is obtained; the raw materials of the backfill material are simple and easy to obtain, the process is simple and convenient, different engineering requirements can be met by regulating and controlling the proportion of different material systems, and the problems that the muck containing area is insufficient and the disposal cost is high can be effectively solved.

The utility model belongs to the field of ore drawing machines for mining industry, and relates to a vibration ore drawing machine which comprises a vibration supporting shaft and a vibration tailstock. The vibration tailstock comprises a vibration tailstock side plate, a supporting plate and a reinforcing plate. The supporting plate is vertically arranged on the periphery of the side plate of the vibration tailstock. The number of the supporting plates is two, the first supporting plate is located on the outer edge of the side plate of the vibration tailstock, and the second supporting plate moves inwards relative to the first supporting plate. The first group of supporting plates, the second group of supporting plates and the vibrating tailstock side plate form a groove; the plurality of reinforcing plates are dispersed and filled in the groove, and the groove is divided into a plurality of grids by the plurality of reinforcing plates; the vibration supporting shafts are installed in the grids. According to the technical scheme, the vibration tailstock of the vibration ore drawing machine and the connecting mode of the vibration supporting shaft and the vibration tailstock are mainly improved, and the vibration tailstock is reinforced.

The invention discloses a large-scale target detection data sample generation method, particularly relates to the field of target detection, and is used for solving the problem of insufficient detection performance of rare category samples caused by data set long-tail distribution in the prior art. The method comprises the following steps: acquiring an initial image data set containing multi-category target object labels, calculating the occurrence frequency of each category of target objects, and determining the category of which the occurrence frequency is lower than a preset threshold value as a rare category; performing dynamic behavior and geometric complexity analysis on the image of the rare category target object, and judging whether the distinguishable degree of the target object and the background is abnormal or not; for the target object with the abnormal distinguishable degree, adjusting the pixel intensity through a contrast enhancement algorithm, and screening a background image conforming to the features of the target object based on a scene matching algorithm; and embedding the adjusted target object into the screened background image to generate a composite image, and adding the composite image into the initial data set to form an expanded image data set.

The invention relates to a converter valve group and a direct current power transmission system. The converter valve group comprises a converter valve string and a cooling loop. The converter valve string comprises multiple stages of converter valve units which are sequentially connected in series in the first direction. The converter valve unit comprises a converter valve module and a damping loop. The converter valve module comprises a converter valve and a radiator arranged beside the converter valve. The damping loop is connected in parallel with the converter valve, and comprises a water-cooled damping resistor and a damping capacitor which are arranged in a second direction away from the converter valve and are connected in series. The second direction intersects the first direction. The cooling loop comprises a main cooling channel extending in the first direction, a first cooling loop communicated with the main cooling channel and the water-cooled damping resistor, and a second cooling loop communicated with the main cooling channel and the radiator. The size of the radiator can be reduced, the weight of the converter valve string can be reduced, and the reliability of the converter valve group can be improved, so that the structural stability and the insulation characteristic of the converter valve group can be improved.

The application discloses a nitrogen-doped carbon-coated three-metal catalyst and a preparation method and application thereof, and belongs to the field of catalyst preparation and application. The method adopts sucrose, melamine and metal salt as low-cost raw materials, and forms an alkaline environment with the assistance of sodium hydroxide. In the environment, melamine is hydrolyzed into cyanuric acid, which is complexed with sucrose metal ions to form a stable supramolecular aggregate precursor containing metal, and then realizes effective encapsulation of the metal in a high-temperature pyrolysis process. The synergistic effect of the three metal elements Co, Ni and Zn significantly improves the performance of the catalyst, so that CoNiZnO@NC-600 not only exhibits high conversion rate (98.4%) and selectivity (99%) in the reaction of hydrogenation conversion of furfural to furfuryl alcohol, but also has excellent cycle stability, thereby providing a new efficient method for the hydrogenation conversion of biomass-derived compounds.

The present invention proposes a method for optimizing the design of an energy-saving butterfly valve structure, which relates to the technical field of computer-aided three-dimensional modeling. The energy-saving butterfly valve is three-dimensionally modeled to create a valve body and a valve plate of the energy-saving valve. A fluid channel and a fluid domain that penetrate the valve body are created inside the valve body. The fluid domain includes a curved area located at the center of the inner surface and a plane area located on both sides of the center. The sealing parameters of the sealing structure of the valve plate periphery are designed to ensure that the actual sealing pressure of the sealing structure is within a limited range. The three-dimensional model of the energy-saving butterfly valve is fluid simulated to optimize the curved area and plane area parameters of the fluid domain. The energy-saving butterfly valve structure designed by optimization can extend its service life, reduce the amount of sealant used, and reduce costs while ensuring the sealing performance.

The application discloses an alumina carrier and a preparation method and application thereof. The method comprises the following steps: using at least two kinds of alumina dry glue powders with different peptization indexes as raw materials, and then performing mixing and / or rolling, forming, drying and calcining to obtain a final alumina carrier, wherein the difference between the peptization indexes of the two kinds of alumina dry glue powders is 10-90%, preferably 15-80%, and further preferably 15-75%. The alumina carrier has high strength, suitable pore channels and specific surface area, and is suitable for preparing heavy distillate oil hydroprocessing catalysts.

The utility model discloses a wear-resistant antibacterial ceramic tile, which relates to the field of ceramic tiles, and comprises a bottom plate, the top of the bottom plate is connected with a wear-resistant mechanism, the wear-resistant mechanism further comprises antibacterial glaze, the antibacterial glaze is also connected to the upper surface of an activated carbon layer, and an aluminum oxide material and the antibacterial glaze are mixed to form the wear-resistant antibacterial ceramic tile. The upper surfaces of the antibacterial glaze and the aluminum oxide material are connected with a microporous DLC (Diamond Like Carbon) protective film. According to the wear-resistant antibacterial ceramic tile, silver ions can be diffused to the surface of the ceramic tile through the microporous buffer fluid and micropores of the microporous DLC protective film, the antibacterial effect of the ceramic tile can be achieved through the silver ions of the antibacterial glaze, the humidity of the ceramic tile can be balanced through the silicon dioxide aerogel, the activity of the silver ions is guaranteed, and the antibacterial effect is improved in a disguised mode; in addition, impact force borne by the silicon dioxide aerogel and the honeycomb blocks can be transmitted to the microporous buffer fluid, the hardness of the microporous buffer fluid can be increased after the microporous buffer fluid is subjected to high-speed impact through the characteristics of an object, and protection on the ceramic tile is greatly improved.

The invention relates to the technical field of conjugated microporous polymer materials, and discloses a covalent triazine unit-based conjugated microporous polymer membrane with negative charges and a preparation method thereof. The method comprises the following steps: firstly, preparing a negatively charged cyanophenyl monomer through nucleophilic substitution reaction of a cyanophenyl-containing compound and 1, 4-butane sultone, then taking the monomer and biphenyl nitrile as comonomers, and carrying out step-by-step polymerization, heating film formation, shock cooling shaping and dual-solvent soaking post-treatment under the catalysis of trifluoromethanesulfonic acid to obtain the cyanophenyl-containing polymer film. And finally obtaining the covalent triazine unit-based conjugated microporous polymer membrane with negative charges. The preparation process is high in controllability, and the obtained film has high stability of a covalent triazine structure and the porous characteristic and negative charge function of conjugated micropores, and has wide application prospects in the fields of gas separation and the like through verification.

This invention discloses a method for preparing N-doped β"-AlON solid electrolyte powder, which includes the following steps: (1) Slurry preparation: weigh anhydrous ethanol and dispersant, add the dispersant to anhydrous ethanol and stir evenly to obtain a mixed solution, then weigh aluminum source powder, lithium source powder, sodium source powder and nitrogen source powder to obtain a mixed powder, add the mixed powder to the mixed solution and stir thoroughly until the mixture is evenly mixed to obtain a mixed slurry; (2) Grinding to prepare precursor slurry: grind the mixed slurry thoroughly to obtain a precursor slurry; (3) Spray drying: spray dry the wet-ground precursor slurry to obtain spray-dried powder; (4) Calcination: calcine the spray-dried powder in a nitrogen atmosphere, and keep warm after calcination to obtain N-doped β"-AlON powder.

The invention belongs to the technical field of chemical power sources, and particularly relates to application of liquid nitrogen rapid cooling in preparation of a nickel-manganese-based sodium ion battery positive electrode material. The sodium-ion battery positive electrode material is synthesized by taking Ni0. 25Mn0. 75 (OH) 2 as a precursor, adding a sodium source and adopting a high-temperature solid-phase method, and the material subjected to high-temperature calcination by liquid nitrogen is rapidly cooled during cooling, so that the local chemical environment of the sodium-ion battery positive electrode material is obviously changed, and the performance of the sodium-ion battery positive electrode material is improved. Therefore, the prepared nickel-manganese-based sodium-ion battery positive electrode material shows excellent electrochemical performance in a wide potential range of 2.0-4.3 V and still has high specific discharge capacity after 100 cycles, and meanwhile, the air stability of the material is improved.

The invention relates to an anti-radiation electronic protective film, and belongs to the field of preparation of electronic protective films. The electronic protective film comprises a double-sided adhesive tape and a soft magnetic radiation-proof layer on the double-sided adhesive tape, the soft magnetic anti-radiation layer is obtained by curing a soft magnetic anti-radiation coating; the soft magnetic anti-radiation coating comprises the following raw materials in parts by mass: 90-100 parts of epoxy resin, 35-70 parts of a solvent, 60-110 parts of a curing agent, 2-4 parts of a flame retardant and 3-6 parts of soft magnetic anti-radiation powder. The prepared electronic protective film is moderate in production cost, beneficial to industrial production, suitable for a high-frequency electromagnetic range and good in magnetic permeability and electromagnetic shielding effect.

The invention discloses a beneficiation-metallurgy combined comprehensive utilization method for germanium-rich lignite. The method comprises the following steps: grading and grinding the germanium-rich lignite, performing catalytic pre-oxidation treatment, performing nitric acid leaching treatment, and recycling, separating and enriching a germanium solution. According to the method, separation and extraction of germanium in the germanium-rich lignite are achieved through a method combining mineral separation, hydrometallurgy and chemical preparation, meanwhile, activation and conversion of organic components in the germanium-rich lignite are achieved, the humic acid product with the high depolymerization degree is prepared, huge carbon emission and waste of organic matter resources in the traditional pyrogenic enrichment process of the germanium-rich lignite are effectively avoided, and the method is suitable for industrial production. Meanwhile, raw materials are provided for the metallurgical industry and agriculture, and the method has the advantages of low environmental pollution, high extraction efficiency and low comprehensive cost.

The invention discloses preparation and uranium separation application of a magnetic element doped cerium dioxide photocatalyst with a spin polarization effect, and belongs to the technical field of rare earth oxides, and the preparation method comprises the following steps: stirring metal nitrate or metal chlorine salt, cerium salt and a mineralizing agent in an aqueous solution until the materials are uniformly mixed, transferring the mixture into a reaction kettle for a hydrothermal reaction, and drying to obtain the magnetic element doped cerium dioxide photocatalyst with the spin polarization effect. Centrifuging, washing and drying, and collecting precursor solid powder; uniformly grinding the precursor solid powder, calcining in an atmosphere furnace, and cooling to room temperature to obtain the magnetic element doped cerium dioxide photocatalyst with the spin polarization effect. The magnetic element doped cerium dioxide photocatalyst with the spin polarization effect prepared by the invention has relatively high uranium separation and removal efficiency and relatively good catalytic stability for separating and removing uranyl ions in complex uranium mine wastewater.

A kind of circuit board manufacturing method of machine single-axis joint module with three-dimensional circuit, manufacture the first core plate with resin plug through hole and circuit pattern in uncovering area, and second core plate, stack and press to form press plate;Second through hole is drilled to the non-uncovering area of press plate and is electroplated, forms second through hole, surface circuit pattern is made, forms pattern plate;Second solder resist pattern is made, uncovering processing is carried out, the resin of resin plug through hole is drilled, forms first molding through hole, surface treatment is formed, second pattern plate;Rigid-flexible combination layer is made and is welded with second pattern plate, forms circuit board;Through uncovering processing, the three-dimensional circuit of rigid plate is formed, the solid hole of three-dimensional circuit is formed, the three-dimensional circuit structure of high reliability, high strength, high hardness;And rigid-flexible combination layer one end and second pattern plate are mutually welded, the other end is contacted in mode, realize effective straight state electric connection, bending state is separated from the dynamic deformation of state.

The utility model relates to the technical field of assembly type buildings, and discloses a prefabricated wall and a prefabricated wall connecting node, the prefabricated wall comprises a wall body, a plurality of pouring holes are formed in the wall body along the length direction of the wall body at intervals, each pouring hole extends along the height direction of the wall body to penetrate through the top and the bottom of the wall body, and the wall body is connected with the prefabricated wall. The bottoms of the pouring holes expand outwards towards the two sides in the length direction of the wall body to form flaring openings. When the prefabricated wall is poured, concrete is poured from the tops of the pouring holes, the concrete flows towards the bottom along the pouring holes, the bottoms of the pouring holes are set to be flared openings, so that the concrete can conveniently flow from the wall bottom of the prefabricated wall to the adjacent pouring holes, and it is guaranteed that the concrete is fully poured at the wall bottom seam of the prefabricated wall; and the construction quality of the prefabricated wall is improved.

The invention relates to a preparation method of an integrated circuit resistant to a space environment, and relates to the technical field of semiconductors, and the preparation method comprises the following steps: S1, a reflow soldering process; s2, a bonding process; s3, a bonding process; s4, a plastic packaging process; s5, scribing; and S6, coating the composite film, wherein the coating process is as follows: B1, carrying out surface modification to form a SiON alkane coating; b2, depositing by a sputtering method to form a SiO2 layer, wherein the SiON alkane coating and the SiO2 layer form a composite atomic oxygen protective film layer; b3, annealing treatment is conducted on the composite atomic oxygen protective film layer, the stability of the composite atomic oxygen protective film layer is verified through a cold and hot cycle test, and the SiON / SiO2 composite film layer is well combined with a plastic packaging material. The technology combines the advantages of organic and inorganic protective layers, provides high flexibility and strong erosion resistance, is simple and convenient in preparation process, low in cost and environment-friendly, is suitable for the fields of electronic packaging, integrated circuits, aeronautical materials and the like, and shows excellent structural characteristics and bonding performance.

The present invention proposes an energy-saving butterfly valve, which relates to the technical field of butterfly valves. The energy-saving butterfly valve includes: a valve body and a valve plate. The inner surface of the valve body is provided with a curved area located in the center and a flat area located on both sides of the center; the thickness of the curved area gradually and continuously increases from the center of the valve body to both sides. The valve plate includes a valve plate body and a sealing structure directly provided on the valve plate body. The sealing structure is composed of at least three sealing elements. The highest points of at least three sealing elements are connected to form a peripheral sealing surface. The height of at least three sealing elements gradually decreases from the middle to both sides. The formed sealing structure is an axially symmetrical structure with a high middle area and a low peripheral area. The peripheral sealing surface is adapted to the curved area of ​​the valve body. The present invention cooperates with the valve plate through a curved valve body with a high middle area and low sides. When the fluid pressure is too large, the sealing performance of the valve plate is compensated during the movement of the valve plate. Within a certain range, the greater the pressure, the tighter the seal, and the compensation is bidirectional.

The invention belongs to the technical field of beauty cosmetics, and particularly relates to a freeze-dried powder composition with anti-aging and repairing functions and a preparation method of the freeze-dried powder composition. The freeze-dried powder composition with the anti-aging and repairing functions is prepared from the following raw materials: 1 to 2 parts of polyoxyethylene stearate, 10 to 15 parts of propylene glycol, 5 to 10 parts of squalane, 1 to 2 parts of acrylamide grafted hydroxyethyl cellulose, 0.1 to 0.5 part of sodium citrate, 0.5 to 1 part of vitamin E, 0.5 to 1 part of vitamin C, 1 to 2 parts of natural extract, 5 to 10 parts of polyethylene glycol-trehalose eutectic and 80 to 100 parts of deionized water. According to the freeze-dried powder, active ingredients are protected through the polyethylene glycol-trehalose eutectic, a powerful moisturizing effect is provided, the stability of the emulsion is prolonged, the stable emulsion is formed through rapid rehydration, the use process is simplified, the moisturizing performance and the oxidation resistance are remarkably improved, skin repair is promoted, and aging is delayed.

The present invention relates to the technical field of heat dissipation of battery packs, and discloses a multi-layer heat dissipation structure for a battery pack, comprising: a carrying box, which comprises a box body and a box cover matched therewith, wherein the inner cavity of the box body is divided into a carrying area and a heat dissipation area from top to bottom; the heat dissipation area is provided with a water cooling mechanism and an air cooling mechanism, and the air cooling mechanism is located below the water cooling mechanism; a partition plate is provided with a plurality of groups, which are plugged into the top side wall of the water cooling mechanism and limited to the edge side wall of the box body; in the present invention, by improving the box structure for accommodating the battery pack, the box body has the heat dissipation modes of natural cooling, water cooling and air cooling, and the overall structure of the carrying box is simple, which meets the requirements of lightweight, is easy to install the battery pack, meets different heat dissipation requirements, and has excellent structural characteristics.

The present invention discloses a method for generating large-scale target detection data samples, which specifically relates to the field of target detection and is used to solve the problem in the prior art that the long-tail distribution of data sets leads to insufficient detection performance of rare category samples; by obtaining an initial image data set containing annotations of multiple categories of target objects, calculating the occurrence frequency of target objects of each category, and determining that the category with an occurrence frequency lower than a preset threshold is a rare category; performing dynamic behavior and geometric complexity analysis on the image of the rare category target object to determine whether the degree of distinguishability between the target object and the background is abnormal; for the target object with an abnormal degree of distinguishability, adjusting the pixel intensity through a contrast enhancement algorithm, and screening a background image that meets the characteristics of the target object based on a scene matching algorithm; embedding the adjusted target object into the screened background image to generate a synthetic image, and adding the synthetic image to the initial data set to form an expanded image data set.