14results about How to "Optimized area" patented technology

A method for preparing a capacitive deionization anode for phosphate adsorption and desorption, and its application, belong to the field of inorganic phosphorus wastewater adsorption and enrichment. This invention aims to solve the problems of existing adsorption materials, such as low phosphate adsorption capacity, difficulty in reusing the adsorbent, or poor conductivity. Method: 1. Preparation of a PEDOT / YMOF-NH2 composite material; 2. Preparation of a capacitive deionization anode. Application: It is used for the adsorption and desorption of phosphates in phosphate-containing water. This invention is used for the preparation of a capacitive deionization anode for phosphate adsorption and desorption.

This invention relates to a tungsten-doped tin dioxide nanopowder, its preparation method, and its application in semiconductor-type gas-sensitive elements. The method for preparing the tungsten-doped tin dioxide nanopowder includes the following steps: dissolving a soluble tungsten compound and a soluble tin compound in an aqueous solution containing a surfactant, and adding a complexing agent to obtain a homogeneous metal ion mixed solution; adding a precipitant to the mixed solution under stirring conditions to adjust the pH to 2-6, causing a metal hydroxide precursor to precipitate; aging, solid-liquid separation, washing, and drying the precipitate to obtain a precursor powder; adding a dispersant to the precursor powder and mixing evenly; and calcining to obtain the tungsten-doped tin dioxide nanopowder. The tungsten-doped tin dioxide nanopowder of this invention can be used in the preparation of semiconductor-type gas-sensitive sensors, ultraviolet detectors, lithium-ion battery anode materials, catalysts, or transparent conductive films.

The application discloses an LDH-based vaccine adjuvant and a preparation method and application thereof, and belongs to the technical field of aluminum adjuvant preparation of vaccines, and the preparation method comprises the following steps: mixing at least one of soluble magnesium salt, soluble zinc salt, soluble manganese salt and soluble calcium salt with soluble aluminum salt, and then performing a co-precipitation reaction with a sodium hydroxide aqueous solution in a colloid mill device, and performing crystallization to obtain LDH nanosheets; dispersing the LDH nanosheets in a PBS solution, adding a hepatitis B surface antigen molecule drug, uniformly mixing, and then performing centrifugation to obtain the LDH-based vaccine adjuvant. The LDH-based vaccine adjuvant can significantly promote the maturation of DC cells and the activation of T cells, and the total IgG level reflects the overall humoral immune response intensity of the body to vaccines or pathogens; the LDH-based vaccine adjuvant forms a "storage library" at an injection site to store antigens and slowly release the antigens, and the purpose of long-time continuous stimulation of the immune system in the body is achieved.

A display apparatus having improved circuit integration of a gate driver, and an electronic apparatus and a vehicle each including the display apparatus are provided. The display device includes: a substrate; a pixel transistor on the substrate; an anode electrode on and connected to the pixel transistor; a light emitting layer on the anode electrode; a pixel defining film on a portion of the anode electrode; a cathode electrode on the light emitting layer and the pixel defining film; and a gate driver in the non-display area of the substrate and connected to the pixel transistor, in which the gate driver includes a first transistor and a second transistor on the substrate, and a first gate electrode of the first transistor and a second gate electrode of the second transistor are directly connected to each other.

The application discloses a kind of carbon black supported iron manganese composite oxide cluster catalyst's Joule heat preparation method and its application in electrocatalytic nitrate reduction preparation ammonia, belong to electrocatalytic ammonia preparation technical field.The catalyst Ketjenblack EC-600JD carbon black is used as carbon carrier, iron manganese composite oxide cluster is uniformly dispersed on the surface of carbon carrier, and the carbon carrier is worm-like mesoporous structure, with high specific surface area and high defect concentration.The application uses sodium citrate as complexing agent, acetylacetone iron and manganese acetate as metal precursor, after complexing, loading, gelation, freeze drying, the target catalyst is prepared by Joule heat instantaneous heat treatment under nitrogen atmosphere;The preparation process has high heat conversion efficiency, low energy consumption, can realize atomic dispersion of iron manganese composite oxide cluster, effectively improves the exposure degree of catalytic active site.The catalyst shows high catalytic activity, high selectivity and excellent stability in electrocatalytic nitrate reduction preparation ammonia reaction, and the ammonia preparation faraday efficiency can reach more than 85%, and the preparation process does not need noble metal and toxic reagent, and the process is green and efficient, easy to scale production, can efficiently convert nitrate wastewater into ammonia, with environmental governance and nitrogen resource recycling value.

The invention relates to the technical field of batteries, in particular to a negative electrode material preparation method based on a negative electrode aged hard carbon material, which comprises the following steps: firstly, crushing and grading an aged hard carbon precursor to obtain particles with a preset particle size; the preparation method comprises the following steps: performing pretreatment such as acid washing, alkali washing, water washing and ethanol washing, mixing a purified precursor with a coating material in proportion to form a uniform coating layer, pre-sintering in a protective atmosphere, and preliminarily stabilizing a material structure by controlling parameters such as a heating rate; and carrying out specific surface area detection on the pre-sintered primary product, and dynamically adjusting pre-sintering process parameters according to the specific surface area detection to ensure that the pore structure of the material reaches the standard. And performing high-temperature carbonization treatment on the material meeting the standard so as to repair the carbon layer structure and improve the conductivity. And finally, performing quality judgment by detecting the first coulombic efficiency of a finished product. According to the invention, the first coulombic efficiency, the specific capacity and the cycling stability of the regenerated hard carbon material are improved, and the recycling of the aging material is realized.

The utility model relates to building structure technical field, specifically disclose a large-span steel wood truss structure for roof, include: end support block, it sets up in steel wood truss structure both ends, and is connected with building foundation structure, the end support block one side is arranged as the support of adapting with butt joint truss, and butt joint truss, standard truss and arc truss connection constitute truss main body structure, the support of end support block and the installation groove inlayed connection of butt joint truss one end. This large-span steel wood truss structure for roof, the inlayed connection cooperation structure of butt joint truss and end support block is filled with structure glue, utilizes the deformation adaptability of inlayed surface friction and glue, and the initial deformation difference of steel wood interface is buffered, and the node steel bar group of positioning frame one both sides is passed through the axial force transmission of the gripping force of steel bar and component, and positioning bolt one passes through radial constraint and limits lateral deformation, and the force flow interference is avoided by the staggered distribution of both, and stress concentration is reduced.

This invention relates to the field of fuel cell technology and discloses a fuel cell heat dissipation system and control method for active balancing heat dissipation in unmanned aerial vehicles (UAVs). The fuel cell heat dissipation system includes a UAV heat dissipation assembly and an active balancing control subsystem. The UAV heat dissipation assembly includes a liquid cooling circuit and rotors disposed at the tips of multiple heat dissipation arms. The liquid cooling circuit includes coolant channels disposed inside the multiple heat dissipation arms. The coolant channels include in-arm liquid inflow pipes and in-arm liquid return pipes. Multiple in-arm liquid inflow pipes are arranged close to the inner side of the heat dissipation arms, and the multiple inflow pipes converge at the tips of the heat dissipation arms and connect to the in-arm liquid return pipes. The inflow pipes have an S-shaped variable diameter pipe structure, and their arrangement density gradually decreases from the root to the tip of the heat dissipation arm. The active balancing control subsystem includes a sensor group, an actuator group, and a controller. This invention can improve the reliability and flight safety of the UAV thermal management system.

The invention belongs to the technical field of large-area photovoltaic cells, and particularly relates to a method for realizing mechanical planarization of the surface of a perovskite thin film through blade coating and a preparation method of a perovskite solar cell. The method comprises the following steps: firstly, preparing an initial perovskite layer by adopting a blade coating, gas quenching and annealing process, and then dropwise adding an alcohol auxiliary solution to carry out blade coating, gas quenching and annealing treatment again to flatten the surface of the initial perovskite layer so as to obtain a final perovskite thin film layer; the uniformity and smoothness of the upper surface of the thin film are effectively improved through the dropwise adding of the auxiliary solution and the synergistic effect of the two times of blade coating, gas quenching and annealing processes. When the perovskite solar cell is applied to the perovskite solar cell, the carrier transmission efficiency between a perovskite light absorption layer and an electron transmission layer is effectively improved; the moisture absorbed by the thin film in the blade coating process is reduced, and the damage of the moisture to the perovskite thin film in the subsequent annealing process is reduced, so that the overall performance of the perovskite solar cell is effectively improved.

The invention belongs to the technical field of analytical chemistry, and particularly relates to an aptamer functionalized COF material and application thereof in aflatoxin detection. Specifically, vinyl COF (Tpb-Dva-COF) is used as a substrate, amino groups are introduced through post-modification, and aflatoxin nucleic acid aptamers are covalently fixed on the surface of the substrate by using a chemical crosslinking method. The invention also establishes a method for detecting aflatoxins B1, B2, G1 and G2 in food and traditional Chinese medicinal materials by combining ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS / MS) based on the material as a solid phase extraction (SPE) adsorbent, and provides an efficient and reliable solution for accurate detection of trace aflatoxins in a complex matrix, so that the material has good practical application value.

The invention belongs to the technical field of livestock and poultry manure utilization and rice seedling raising. The invention provides a rice seedling raising substrate based on chicken manure biogas residues. The rice seedling raising substrate comprises the following components in percentage by mass: 25-35% of chicken manure biogas residues, 45-50% of garden soil, 4-6% of peat soil, 8-12% of rice husk charcoal, 4-6% of vermiculite and 1-3% of a seedling strengthening agent. About half of the seedling raising substrate is garden soil which is wide in source and convenient to obtain, and the cost can be effectively reduced; meanwhile, the chicken manure biogas residues are subjected to resource utilization, so that rich nitrogen, phosphorus, potassium and organic matters in the chicken manure biogas residues are fully utilized, and the problem that the stress resistance of seedlings is reduced due to too high nutrients is avoided while nutrient supply is guaranteed. In addition, only a small amount of peat soil, vermiculite and rice husk charcoal are needed as structure adjusting components, and dependence on non-renewable resources is reduced. Moreover, the obtained seedling raising substrate is moderate in volume weight, good in water retention and air permeability, high in nutrient content, stable in structure and long in storage period.

A method for recovering and reusing active materials from cathode waste is provided. The method for reusing cathode active materials according to the present invention includes the following steps: (a) heat-treating cathode waste comprising a cathode active material layer including a lithium composite transition metal oxide on a current collector in air to pyrolyze the binder and conductive material in the active material layer, thereby separating the current collector from the active material layer and recovering the active material in the active material layer; (b) rinsing the recovered active material with a cleaning solution; and (c) adding a lithium precursor to the rinsed active material and annealing the active material to obtain reusable active material, wherein the decrease in the molar ratio of lithium to other metals in the active material after heat treatment or after rinsing, compared to the molar ratio of lithium to other metals in the active material in the cathode waste before heat treatment, is within 20%.

A nitrogen-adsorption gel material, its preparation, and its application are disclosed. The nitrogen-adsorption gel material comprises a porous network structure cross-linked with polyvinyl alcohol and phytic acid, and the porous network structure is loaded with zeolite particles. The preparation method involves adding zeolite to a copolymer solution of polyvinyl alcohol and phytic acid under alkaline conditions, and then adding a cross-linking agent to the resulting polyvinyl alcohol-phytic acid-zeolite mixture for cross-linking and curing. The cross-linked and cured mixture is subjected to liquid-solid separation, and the solids after liquid-solid separation are washed until the pH is neutral. The nitrogen-adsorption gel material is used to reduce the ammonia nitrogen content in water bodies through adsorption, or added to a bioreactor to couple a biological reaction for deep denitrification. The material of this invention has good sphericity and excellent ammonia nitrogen adsorption performance.

The present application relates to livestock state monitoring technical field, especially in kind of livestock outlier detection method, electronic equipment and computer storage medium, including the following steps: S1. Construct data set; S2. Use target detection tool to carry out object detection to each picture in data set, draw the position mark of each livestock; S3. The position mark of all pictures in data set is superimposed in position, and the hotspot map is drawn;S4. According to the position mark in picture, the distance value of each livestock and the density score value of each livestock are calculated;S5. If the distance value and the density score value of certain livestock meet the outlier condition, the livestock is regarded as outlier;S6. If the time of continuously finding the livestock regarded as outlier exceeds time threshold, it is determined that there is livestock outlier in the fence;The present application does not need to be matched with identity tag, identification and tracking technology, and the calculation amount is small, fully considers space density, resource distribution, group activity mode, individual difference and other factors, and the outlier recognition precision and efficiency are significantly improved.