403results about How to "Improve distribution uniformity" patented technology

The invention discloses a large-scale point cloud registration method, system and device based on a power grid power transmission line and a storage medium, and the method comprises the steps: collecting point cloud data of the power transmission line under different visual angles, and forming a source point cloud set and a target point cloud set; down-sampling point cloud data in the source point cloud set and the target point cloud set, dynamically adjusting the sampling granularity of different density regions, and obtaining representative point cloud data from the source point cloud set and the target point cloud set; extracting point cloud feature points, accelerating neighborhood search through a KD-Tree structure, and adaptively adjusting a neighborhood search radius; constructing a geometric topology model; performing coarse registration based on an improved RANSAC algorithm, selecting non-collinear feature points, and optimizing a transformation model; an improved ICP algorithm is adopted to carry out fine registration, and normal vector features are utilized to introduce weighting factors to optimize registration precision. According to the invention, large-scale power transmission line point cloud data can be efficiently and accurately processed, and the method is especially suitable for power inspection, three-dimensional modeling and maintenance scenes.

The invention discloses an air conditioner energy-saving control method and system based on multi-objective optimization, a medium and a product, and relates to the field of data processing. The method comprises the steps that optimization targets for conducting energy-saving control on the air conditioner and corresponding constraint conditions are determined, and the optimization targets comprise target air conditioner energy consumption and target comfort degree; acquiring current environment data of the air conditioner; the equipment operation parameter combination of the air conditioner is used as particles in the multi-target particle swarm algorithm; determining an optimal solution through a multi-target particle swarm algorithm; the air conditioner is controlled according to the parameter combination corresponding to the optimal solution; the actual air conditioner energy consumption and the actual comfort degree are obtained; based on the target air conditioner energy consumption, the target comfort level, the actual air conditioner energy consumption and the actual comfort level, the equipment operation parameters of the air conditioner are adjusted through a PID control algorithm, and final equipment operation parameters are obtained; and controlling the air conditioner to work according to the final equipment operation parameters. According to the method, both the energy-saving effect and the comfort level of the air conditioner are balanced.

The invention provides a supported catalyst as well as a preparation method and application thereof. The preparation method of the supported catalyst comprises the following steps: S1, carrying out precipitation reaction on vanadate and first ammonium salt in a first solvent to obtain a first product system containing a carrier precursor; s2, enabling the carrier precursor, a second ammonium salt, a noble metal-containing compound, a chelating agent and a first reducing agent to react in a second solvent to obtain a second product system containing a catalyst precursor; and S3, carrying out annealing treatment on the catalyst precursor and a second reducing agent in protective gas to obtain the supported catalyst. The noble metal in the supported catalyst prepared by the method is not easy to migrate and aggregate, and the stability is better. In addition, the dosage of precious metal needed by the preparation method is smaller, and the atom utilization rate is higher.

According to the energy storage coupling heat pump steam generation method and system, the mode that the heat pump device and the energy storage device cooperatively operate is adopted, and efficient and economical steam supply is achieved. The method comprises the steps that high-temperature water is prepared and stored in the off-peak electricity period through the heat pump device, and the high-temperature water is further heated through the energy storage device to generate superheated steam for a user to use. The energy storage device comprises a plurality of energy storage modules, and a heat exchange pipeline of the energy storage device can be switched between a parallel connection mode and a series connection mode through switching, so that deep heat release and flexible regulation and control are achieved. According to the method, the energy storage capacity and heat release power of the energy storage module are dynamically adjusted, enthalpy increment distribution of the heat pump and the energy storage device is optimized in combination with load prediction, and diversified steam requirements are met. And meanwhile, preheating or dynamic supplement is conducted on the energy storage module through the heat pump device, waste heat recovery is achieved, and the energy efficiency is improved. According to the method, the operation cost is remarkably reduced, the capacity of the system for adapting to load fluctuation is enhanced, and the method is suitable for industrial steam use scenes and has the advantages of being efficient, stable and flexible.

The invention belongs to the technical field of power battery cooling, and particularly relates to a flow control method and system for a liquid cooling system of an electric vehicle-mounted power battery, and the method comprises the steps: carrying out the parameterization of a geometric model of the liquid cooling system; establishing an equipment resistance model based on the equipment flow resistance characteristics; initializing flow distribution, constructing a dynamic flow distribution model, calculating the flow of each node and judging whether the flow meets a target requirement or not, and if not, readjusting the flow; calculating the resistance of each section, determining the total resistance of the pipeline, and checking the water pump lift; the flow uniformity is judged by calculating the pipeline resistance between the nodes, and if the flow is not uniform, the flow is redistributed or the pipeline design is optimized until the flow is uniform. Through flow control, the problems of non-uniform flow distribution and poor temperature consistency of multiple battery packs in the prior art are solved, the optimal working state of the power battery is ensured, overheating and overlarge temperature difference are avoided, and the operation efficiency, stability, durability and safety are improved.

The invention discloses an AGV obstacle avoidance path planning method in an unmanned warehousing system, and the method comprises the steps: employing nested Logistic mapping and Skew Tent mapping to generate a chaotic initialization population to replace a population generation mode of a conventional differential evolution algorithm, carrying out the Levy flight operation after the selection operation, and carrying out the global path search on an environment map, thereby achieving the optimal path planning. And obtaining an AGV global feasible path avoiding obstacles in the environment map, and when the AGV has an unknown obstacle on the feasible path, re-planning the local path by adopting a dynamic window method so as to enable the AGV to realize an obstacle avoidance process in an interval where the unknown obstacle is located. The improved differential evolution algorithm enhances the global search capability through chaos initialization and a Levy flight strategy, and the AGV can quickly respond to an unknown obstacle through a dynamic window rule. The adaptability and the accuracy of path planning are improved, and the obstacle avoidance capability and the safety of the AGV in a complex environment are enhanced at the same time.

The utility model provides a lower electrode device and semiconductor processing equipment, the lower electrode device comprises a chuck, and a plurality of gas paths and a plurality of radio frequency introduction assemblies distributed around the center of the chuck, the chuck is used for bearing a plurality of wafers, the plurality of gas paths are used for being in one-to-one correspondence with the plurality of wafers, the gas paths are arranged on the chuck and penetrate through the thickness of the chuck, and the radio frequency introduction assemblies are arranged on the chuck. A gas outlet of the gas circuit is positioned in a corresponding wafer placing area on the chuck; the radio frequency feed-in pieces are used for being in one-to-one correspondence with a plurality of wafers, the radio frequency feed-in pieces are in conductive contact with the bottom of the chuck, and the orthographic projection of the contact position on the top surface of the chuck is located in the center of a corresponding wafer placing area borne on the chuck. Therefore, the gas medium flowing out of the gas path can be blown to the lower part of the corresponding wafer for heat exchange, the temperature distribution uniformity of the wafer is high, the distribution uniformity of the magnetic field is high, the process uniformity is greatly improved, and the product yield is high.

The invention discloses a high-compaction-density ferromanganese phosphate precursor and a preparation method thereof, and belongs to the technical field of lithium batteries, and the provided preparation method comprises the following steps: step 1, respectively dissolving a manganese source, an iron source and a phosphorus source in water to form solutions; 2, adding a complexing agent into the iron source solution to form a complexing iron salt solution; step 3, mixing the complexing ferric salt solution, the manganese source solution and the phosphorus source solution, adding an oxidizing agent and alkali liquor, keeping the pH value of the system to be 5.5-8, heating and stirring for reaction, and synchronously introducing oxygen for bubbling during reaction; and 4, after the reaction is finished, carrying out solid-liquid separation, and drying and roasting to obtain the ferromanganese phosphate precursor. According to the method, under the action of the complexing agent, the homogeneity of iron-manganese coprecipitation is improved, oxygen is introduced for bubbling in the reaction process, and excessive growth of crystals is inhibited while the oxidation condition is ensured, so that the ferromanganese phosphate precursor is proper in particle size and uniform in distribution, and the positive electrode material prepared from the precursor has high compaction density and excellent electrochemical performance.

The invention discloses a traveling wave electric curtain lunar dust conveying device based on three-dimensional electrodes, and relates to the field of lunar dust conveying. In order to solve the problems of low utilization rate of an electric field, easy abrasion of equipment and high energy consumption in the existing lunar dust transportation work in the prior art, the technical scheme provided by the invention is as follows: the traveling wave electric curtain lunar dust transportation device based on the three-dimensional electrode comprises a substrate; the wedge-shaped microstructure is arranged on the upper surface of the substrate, and the wedge-shaped microstructure is in a triangular prism shape; and the electrodes are arranged on the side walls of the wedge-shaped microstructures and used for generating electrodes and transporting lunar dust particles. The invention also provides a traveling wave electric curtain lunar dust transportation method based on the three-dimensional electrode, the method is realized based on the device, and the method comprises the following steps: collecting the motion state of lunar dust particles; a step of adjusting a driving voltage according to the motion state; and driving the electrode according to the adjusted driving voltage. The lunar dust conveying device is suitable for lunar dust conveying work.

A feeding system for potassium sulfate production relates to the technical field of raw material feeding equipment and comprises a horizontally-arranged supporting base, a vertically-arranged reaction kettle body and a supporting bracket are fixedly arranged at the top of the supporting base, two vertically-arranged raw material tanks are fixedly inserted into the top of the supporting bracket, and a built-in mixing assembly is arranged on the upper inner wall of the reaction kettle body. Quantitative material taking assemblies are arranged on the lower inner walls of the raw material tanks, the built-in mixing assembly is communicated with the two quantitative material taking assemblies through a communication assembly, a transmission rod which is rotationally arranged is coaxially arranged at the inner bottom of the reaction kettle body, and a plurality of stirring blades are uniformly distributed on the outer wall of the transmission rod in the circumferential direction; an exhaust pipe communicated with the inner cavity of the reaction kettle body is fixedly arranged at a position, below the built-in mixing assembly, of the outer wall of the reaction kettle body. The problem that an existing feeding mode for producing potassium sulfate is poor in raw material feeding continuity is solved; the adjustability of the feeding ratio of the raw materials is poor. And the distribution uniformity of the fed raw materials is poor.

The invention provides mupirocin ointment as well as a preparation method and an application method thereof. The weight of mupirocin accounts for 0.1-0.5% of the total weight of the ointment. The water-soluble matrix is selected from polyethylene glycol, glycerol, propylene glycol or a mixture thereof. The stability and the curative effect of the medicine can be improved, and meanwhile, the safety and the use convenience of the ointment are ensured.

The invention relates to the technical field of semiconductor devices, in particular to a manufacturing method of an avalanche high-voltage silicon stack, and the method comprises the steps: randomly obtaining a diode distribution vector and a doping concentration vector according to the range of the working voltage of the avalanche high-voltage silicon stack and the number of sub-modules; simulating avalanche high-voltage silicon stacks by the aid of simulation software to obtain simulation qualified vectors, silicon stack power and voltage distribution vectors; calculating a simulation qualified rate; obtaining a voltage adaptation degree of each voltage distribution vector; obtaining a high voltage weight, and carrying out weighted summation on the voltage adaptation degree to obtain a high voltage tolerance degree; and obtaining a voltage-sharing effect evaluation value, and obtaining a final manufacturing scheme of the avalanche high-voltage silicon stack by adopting an optimization algorithm. The invention aims to balance the divided voltage between the diodes in the silicon stack, improve the voltage distribution uniformity, improve the tolerance to high voltage, and reduce the Zener breakdown risk.

The invention discloses a multilayer circuit board preparation method and system based on via hole filling optimization and a multilayer circuit board, and relates to the technical field of circuit board preparation, and the method comprises the steps: obtaining the size of a via hole, calculating the depth-to-width ratio, constructing a viscosity gradient function, taking a via hole filling quality evaluation index as a first optimization target, and solving an optimal ratio; designing a vacuum degree control strategy; the current capillary pressure is obtained, differential pressure driving force is calculated according to the current through hole gas pressure intensity, the time needed for filling and the preset ultrasonic vibration duration are calculated in combination with the through hole diameter, the hole depth and the viscosity gradient function, and ultrasonic auxiliary filling is carried out while through hole filling is carried out; filling the via hole, and controlling the vacuum degree according to the vacuum degree adjusting curve; and the real-time filling rate and the cavity volume are obtained, a second target function is constructed with the difference between the minimum target filling rate and the actual filling rate and the filling cost as a second optimization target, and the optimal filling step number and the optimal single injection material volume are solved.

The invention relates to ultrahigh-strength ultrahigh-toughness concrete and a preparation method thereof, and the process of the preparation method is as follows: designing the mix proportion of concrete slurry based on a close packing theory, and selecting a slurry formula with the fluidity of not less than 180mm and the initial strength of not less than 60MPa as a reference mix proportion; steel fibers are selected as end hook type steel fibers, a wood plate or a steel plate is used for formwork supporting according to the size requirement of the test piece, then a steel fiber cage is laid with the end hook type steel fibers within the supporting range, and the steel fibers are staggered with one another to form a macroscopic steel fiber space framework within the supporting range; preparing slurry according to a standard mixing ratio, then infiltrating the slurry into the built steel fiber space framework, and vibrating after the steel fiber space framework is completely infiltrated with the slurry; and then curing and form removal are performed to obtain the ultrahigh-strength ultrahigh-toughness concrete. The problem of agglomeration effect caused by too high fiber mixing amount is solved, and the unified requirements on the strength and toughness of concrete materials in engineering are met.

The invention discloses an additive manufacturing method for generating a nanoparticle strengthening phase through an aluminum-silicon alloy in-situ reaction, which is characterized in that reaction gases such as N2, C2H2 and the like are introduced in a selective laser melting additive forming process, the volume fraction of the reaction gases is greater than 50%, and the gases and metal are subjected to a combination reaction on the surface of a molten pool under the action of a high-energy laser beam, so that the surface of the metal is subjected to a nano-particle strengthening phase; and particles generated on the surface of the molten pool are dispersed into the molten pool under the violent stirring effect of the molten pool under the laser effect. After laser spots move, a molten pool is solidified, a certain volume fraction of nano-particles with a precipitation strengthening effect are produced in situ in a tissue, and the problems of generation of a coarse precipitation phase and unmelted particles and the like are solved. According to the method, various nano-sized reinforced phase particles can be generated in situ in the selective laser melting additive forming process, the particles are fine and are uniformly dispersed, the strengthening effect is good, and the mechanical property of the formed aluminum-silicon alloy can be remarkably improved.

The invention relates to the technical field of lignite humic acid fertilizer preparation, in particular to a technology and equipment for producing lignite humic acid fertilizer through spraying granulation, the equipment comprises a bottom plate, a temperature rise detection mechanism is arranged above the bottom plate, the temperature rise detection mechanism comprises a cylinder, the cylinder is fixedly installed at the top of the bottom plate, and a temperature rise detection mechanism is arranged above the cylinder. A round rod is rotatably connected to the inner wall of the top of the cylinder, a plurality of stirring blades are rotatably connected to the outer side of the round rod at equal intervals, the section of each stirring blade is a parallelogram, and a plurality of first limiting blocks and second limiting blocks are fixedly connected to the outer side of the round rod at equal intervals; and the outer sides of the first limiting blocks can abut against the outer sides of the corresponding stirring blades. In the heating process, the heating mixing mechanism and the viscosity detection mechanism are integrated together, so that on one hand, the mixing effect is improved, on the other hand, the viscosity of slurry at the temperature can reach a set range after the slurry reaches the set temperature, and the production efficiency and quality are further ensured.

The invention relates to an AEM electrolytic bath. The current density and the heat exchange capacity of the electrolytic bath are improved. Liquid on the anode side of each single section of the electrolytic cell can uniformly and quickly flow on the surface of the anion exchange membrane, oxygen generated on the anode side can be quickly and effectively discharged out of the electrolytic cell, and hydrogen generated on the cathode side and water permeated from the anion exchange membrane can be timely and efficiently discharged out of the electrolytic cell; certain pressure is provided for the cathode catalyst layer and the anode catalyst layer, so that the catalyst layers are uniformly stressed and attached to the two sides of the anion exchange membrane. In a comparison test of electrolysis with an active area of 300cm < 2 >, under the same conditions of 2V voltage and temperature of 60 DEG C, the current value of the electrolytic bath of a cutting machining flow field on a metal pole plate is 218A, the current value of the electrolytic bath of a spongy foam metal flow field with a groove-shaped flow channel is 289A, and the efficiency is improved by 32.56%. And under other working conditions, the test current is also improved by 20%-32%.

The embodiment of the invention provides a preparation method of a tungsten-copper alloy and the tungsten-copper alloy, and relates to the technical field of alloy preparation.The method comprises the steps that superfine tungsten oxide powder, tungsten salt, copper salt and a polymer additive are added into deionized water to be evenly mixed, and a precursor mixed solution is obtained; carrying out spray granulation on the precursor mixed solution by adopting a spray dryer to obtain spherical tungsten-copper precursor composite powder; roasting the spherical tungsten-copper precursor composite powder to obtain tungsten-copper oxide composite powder, and carrying out segmented reduction on the tungsten-copper oxide composite powder to obtain tungsten-copper composite powder with tungsten grains having a nanocrystalline / ultra-fine grain bimodal distribution characteristic; and the tungsten-copper composite powder is pressed to obtain an alloy blank, the alloy blank is sintered, and the tungsten-copper alloy is prepared. According to the double-peak distribution tungsten-copper composite powder, full densification of the alloy can be promoted through coupling rearrangement of large and small tungsten particles in the sintering process, and the compactness, the heat conductivity and the electric conductivity of the tungsten-copper alloy can be improved.

The invention discloses a method for recycling a scrapped auxiliary electrode, and relates to the technical field of titanium alloy materials, and the method comprises the following steps: carrying out machining, sand blasting or acid pickling on the auxiliary electrode to remove black skin and weld beading on the surface; the head and bottom end faces are machined and flattened; the treated auxiliary electrodes with the diameter error not exceeding 5% are connected end to end in series to form a 1 * N consumable electrode, the alloy adding procedure is transferred to the vacuum consumable smelting procedure from electrode preparation, the risk that high-density inclusion is introduced due to punch cracking when an oil press is used in the electrode preparation process is avoided, and technical innovation is achieved; before wrapping, the sponge titanium and the alloy additive are mixed in a stainless steel or titanium container, it is ensured that TiO2, C powder, aluminum molybdenum and other alloy additives are fully dispersed, a blocky low-density inclusion source formed after the powdery alloy additive is stacked and subjected to high-pressure compression molding is avoided, and the technical principle is obviously superior to that of a traditional compression process.

The invention relates to a single-sided polishing method for an 8-inch silicon carbide wafer, which adopts a ceramic disc with the radius less than 8 inches to perform single-sided polishing on the 8-inch silicon carbide wafer, and ensures mechanical balance and efficient polishing in the polishing process by reasonably setting the distance between the wafer and the ceramic disc as well as the distance between the wafer and a polishing disc. And the fluidity and the uniformity of the polishing solution are further enhanced through the optimal design of the polishing cloth and the groove body. The small-size wafer is used as an auxiliary tool, the stability and the machining flexibility of the polishing process are improved, the surface flatness of the polished wafer meets the actual production requirement, meanwhile, the production cost is remarkably reduced, and the equipment utilization rate and the production efficiency are improved. The silicon carbide wafer polishing method is efficient, low in cost and high in flexibility, and has remarkable economic benefits and practical value.

The invention relates to the technical field of circuit board production equipment, and discloses multi-layer circuit board vacuum pressing equipment and a control method.The multi-layer circuit board vacuum pressing equipment comprises a machine base, a pressing device and a controller, a pressing cavity is formed in the machine base, the pressing cavity is connected with vacuumizing equipment through a pipeline, and an upper pressing plate and a lower pressing plate are arranged in the pressing cavity; the pressing device comprises a main oil cylinder and a pressure supplementing assembly, the pressure supplementing assembly comprises a seat body, a cover plate, a plurality of first pistons and a plurality of second pistons, output rods of the first pistons and output rods of the second pistons are connected with an upper pressing plate, the cover plate is connected to the upper end of the seat body, and a first oil inlet connector and a second oil inlet connector are connected to the cover plate. The first oil inlet connector and the second oil inlet connector are each provided with an electric control pressure regulating valve, the first oil inlet connector is communicated with the first annular groove, the second oil inlet connector is communicated with the second annular groove, an output rod of the main oil cylinder is connected with the cover plate, and the first oil inlet connector, the second oil inlet connector and the main oil cylinder are connected to a hydraulic station through pipelines.

The invention relates to the technical field of redox flow batteries, in particular to a flow battery electric pile bipolar plate and a flow battery. The flow battery stack bipolar plate comprises a bipolar plate body, the bipolar plate body is provided with more than two annular spiral grooves, each annular spiral groove forms an annular spiral flow channel, the annular spiral flow channels are used for flowing of electrolyte, the annular spiral flow channels are nested, each annular spiral flow channel is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with each other. A liquid inlet and a liquid outlet in each annular spiral flow channel are independent from each other; the annular spiral flow channels on the bipolar plate of the redox flow battery stack can be independently controlled and do not influence one another, the flowing speed, the flow and the distribution uniformity are completely kept consistent, and the performance of a redox flow battery is improved.

The utility model provides a master batch main material mixing and blanking mechanism, which solves the problems of distribution uniformity of master batch blanking and the like, and comprises a blanking barrel, a plurality of feeding barrels are connected to the upper end of the blanking barrel, a plurality of blanking plates which are arranged in a stacked manner are arranged in the blanking barrel, and a pushing assembly which extends to the edge is mounted in the middle of each blanking plate. Material collecting funnels are installed below the blanking plates correspondingly, and a feeding assembly is installed at the bottom of the discharging barrel. The master batch mixing device has the advantages of good master batch mixing effect, stable operation and the like.

The invention discloses a low-nickel matte grinding and selecting device, and relates to the technical field of low-nickel matte grinding and selecting. Comprising a mounting frame, a magnetic separator is mounted on the lower side of the mounting frame, a feeding port is formed in the magnetic separator, a base is fixedly connected to the upper side of the mounting frame, two supporting seats are fixedly connected to the base, hollow shafts are rotationally connected to the opposite sides of the two supporting seats, and feeding ports are formed in the hollow shafts; the two hollow shafts are jointly and fixedly connected with a barrel, a plurality of grinding balls different in size are placed in the barrel, a power system used for providing power for rotation of the barrel is arranged on the base, and a plurality of discharging grooves are formed in the barrel. And the plurality of screens are fixedly connected to the interiors of the adjacent discharging grooves respectively. By arranging the screen, particles with qualified particle sizes are discharged through the screen in real time in the ball milling process, the condition of over-milling is prevented, the particle size qualification rate of the finished low-nickel matte is increased, and meanwhile, the influence on the subsequent grading step is reduced.

The invention relates to the technical field of mullite brick production, in particular to a mullite brick production pouring device which comprises a conveying frame. The storage barrel is arranged above the conveying frame through a supporting frame; the fixing frame is fixedly mounted on the top surface of the conveying frame; the air cylinder is fixedly installed on the top face of the fixing frame, and the telescopic end of the air cylinder penetrates through the top face of the fixing frame; the pressing plate is fixedly installed at the telescopic end of the air cylinder. Compared with the prior art, by arranging the pressing plate and the cleaning assembly, in the resetting process of the pressing plate, a third transmission gear drives a connecting rod to rotate, a coil spring accumulates force, and when the pressing plate is completely reset, the coil spring releases energy, drives the connecting rod to rotate reversely and drives a reciprocating lead screw to rotate, so that a sliding plate is driven to slide back and forth along a guide rod, and a cleaning scraping plate cleans the bottom face of the pressing plate; the bottom face of the pressing plate can be automatically cleaned after the pressing plate is used every time, residues are prevented from affecting next-time use, and therefore automatic cleaning of the bottom face of the pressing plate and collection of materials are achieved.

The invention relates to the technical field of batteries, in particular to a surface-modified positive electrode material and a surface modification method thereof. The positive electrode material surface modification method provided by the invention comprises the following steps: S1, mixing a cobalt source with an organic solvent to obtain an intermediate, and depositing the intermediate on a graphite sheet by adopting a chemical deposition method to obtain a coating material; and S2, mixing the positive electrode material with the coating material obtained in the step S1, and calcining to obtain the surface-modified positive electrode material. According to the invention, the cobalt source is deposited on the graphite flake through a chemical deposition method to form the graphite flake of which the surface is uniformly coated with cobalt hydroxide, so that not only can the stability of the coating material structure be improved, but also the electrochemical activity of cobalt hydroxide in the coating material can be further improved; the graphite flake with cobalt hydroxide deposited on the surface is used as a coating material to be sintered with the positive electrode material, so that the obtained surface-modified positive electrode material is good in structural stability and high in specific capacity, and the cycle retention rate of the battery can be improved.

The invention discloses steel for a bearing outer ring of a super-power wind generating set and a manufacturing process of the steel, and belongs to the technical field of wind power equipment manufacturing. The invention discloses steel for a bearing outer ring of a super-power wind generating set. The steel comprises the following components in percentage by mass: 0.48%-0.52% of C, 0.28%-0.33% of Si, 0.62%-0.66% of Mn, 0.97%-1.04% of Cr, 0.16%-0.21% of Mo, 0.005%-0.01% of Ti, 0.003%-0.008% of Zr, 0.0007%-0.001% of Ba and the balance of Fe. According to the method, alloy elements such as Ti, Zr and Ba are used for refining the sizes of grains and inclusions, meanwhile, the crushing degree and uniform distribution of the blank tissue and the inclusions are enhanced through extrusion and torsion, a fine and uniform metal flow line can be obtained after ring rolling, and the mechanical property of a forged piece is improved.

The invention discloses a negative pole piece and a lithium ion battery, belongs to the technical field of lithium ion batteries, and overcomes the defects that the rate capability of the lithium ion battery in the prior art is relatively low, and lithium is easy to separate out in a circulating process. The negative electrode active material comprises a first negative electrode active material and a second negative electrode active material, the negative electrode active material satisfies the following conditions: A-B = 0.01-0.75 g / cm < 3 >; a is the ultimate compaction density of the first negative electrode active material, and B is the ultimate compaction density of the second negative electrode active material; in the negative electrode active material layer, the negative electrode active material layer comprises n coating layers along the direction far away from the current collector, n is more than or equal to 3 and less than or equal to 10, and n is an integer; along the direction far away from the current collector, the content of the first negative electrode active material in the n coating layers is gradually reduced, and the content of the second negative electrode active material is gradually increased. The problem of local black spots or lithium precipitation of the anode interface can be avoided, and meanwhile the cycling stability is improved.

The invention discloses a temperature response type charge controllable nano bactericide. The average particle size range of the nano bactericide is 80-200nm, and the average Zeta potential range of the nano bactericide is-4.2 mV to 41.5 mV; the nano-bactericide is in a regular spherical shape and is composed of a positive polymer, a negative polymer and pyraclostrobin, surface charges of nano-particles are controlled by adjusting the proportion of the positive polymer to the negative polymer, and the deposition and uptake effects of the nano-particles on leaves are optimized through temperature response. Compared with the prior art, the pyraclostrobin has the advantages that the control effect on the botrytis cinerea can be up to 84% at most, meanwhile, the control effect on the botrytis cinerea can be improved to about 88% under temperature control and is nearly doubled compared with normal temperature, the application efficiency of the pyraclostrobin is remarkably improved, and the deposition uniformity of nano-particles and the uptake ability of plants are improved.

The invention relates to the technical field of superhard composite materials, in particular to a manufacturing method of a superfine diamond compact, which is characterized by comprising the following steps: S1, raw material selection and pretreatment: diamond particles: selecting high-purity diamond powder with the particle size of 0.1-1 mu m; a hard alloy, such as a cobalt-based alloy, is adopted as a matrix material; nanoscale ceramic particles such as silicon nitride and aluminum oxide are added to serve as the reinforcing materials, gaps between the base body and the diamond particles are filled, and the compactness of the materials is improved; and S2, diamond particle uniform distribution treatment is conducted, specifically, a mechanical stirring and ultrasonic dispersion combined method is adopted, the diamond particles and the matrix powder are fully mixed, the matrix powder and the diamond particles are stirred at a low speed through mechanical stirring, and the particles are preliminarily dispersed. And the uniformity is improved: mechanical stirring, ultrasonic dispersion and electrostatic dispersion are combined, so that the distribution uniformity of diamond particles in a matrix is remarkably improved.