212results about How to "Solve uneven distribution" patented technology

The invention provides an ultrasonic welding method of Al/Ti dissimilar metal TIG electrical arc micro-melting brazing and following welding, wherein an isochronous and stable ultrasonic vibration system is added in the TIG micro-melting brazing process, and the simultaneous and equi-directional welding of TIG micro-melting brazing and following welding is realized through a spherical interlinking device. The method comprises the following steps of: enabling a welding gun tungsten electrode and a test piece to reach reasonable welding height by vertically adjusting the position of a welding gun; enabling a continuous vibration ball to cling to the surface of the test piece by vertically adjusting an ultrasonic transmitting device; measuring the distance d from the contact point of the continuous vibration ball and the surface of the test piece to a TIG welding gun tungsten electrode by horizontally adjusting an ultrasonic generating device to enable d to satisfy welding requirements; and reasonably matching an ultrasonic vibration device and a TIG welding gun by adjusting d, and adjusting the acting position of ultrasonic vibration by adjusting d. The invention has strong process applicability and good stability, realizes the semi-automatic welding of Al/Ti dissimilar metal connection, and has wider usability and good improving action for the welding joints of TIG micro-melting brazing for various dissimilar metals.

The invention relates to a real-time information-based metro passenger service system. Mobile terminal equipment automatically connects wireless sensors in a metro station and in metro compartments so as to perform data interaction with the servers to acquire relevant information in the metro station in real time, and the relevant information is used for passengers to view in real time; moreover, a heuristic search strategy based on the estimated arrival time of a metro, running time between stations, the current passenger flow information of the metro station and passenger flow information in each metro compartment is proposed, and therefore the optimal proposed ride scheme is obtained, and meanwhile, a time-optimal and distance-optimal scheme is obtained for the passengers to select; after the scheme is determined, according to the position conditions of the current passengers, a prompt of the next route is provided in real time; the passenger flow conditions of the compartments are determined according to the information of the wireless servers of the metro which is about to arrive, and the best waiting position proposal can be given by the system; after the passenger ride, prompt contents, including the time that the metro is about to arrive the next station, the get-off station and the get-off time of the passengers are given in real time, the exit scheme of the metro station and corresponding map information, can be given in real time.

The invention discloses a control method and device for air conditioner running modes. The control method for air conditioner running modes includes the steps that the environment temperatures in multiple areas in the space where an air conditioner is located are detected; whether the environment temperatures in the multiple areas are uniformly distributed or not is judged; if it is judged that the environment temperatures in the multiple areas are not uniformly distributed, the air conditioner is controlled to run in the first energy-saving mode, wherein the first energy-saving mode is used for adjusting the non-uniform temperature distribution in the multiple areas into uniform temperature distribution; and if it is judged that the environment temperatures in the multiple areas are uniformly distributed, the air conditioner is controlled to run in the second energy-saving mode, wherein the second energy-saving mode is used for keeping the uniform temperature distribution in the multiple areas. By means of the control method and device for the air conditioner running modes, the problem that in the relevant technology, the refrigerating capacity or the heating capacity of air conditioners cannot be reasonably allocated, and accordingly environment temperature field distribution is not uniform is solved.

The invention provides a preparation method of a low-cost hollow spherical YSZ powder for plasma spraying, comprising the following steps: 1, adding yttrium salt and zircon salt in proportion into deionized water and stirring until yttrium salt and zircon salt are completely dissolved so as to obtain a mixed solution; 2, carrying out coprecipitation treatment, filtering and drying so as to obtain a solid mixture; 3, carrying out a hydrothermal reaction to obtain a hydrothermal reaction product; 4, successively carrying out filtration, washing and drying on the hydrothermal reaction product, and carrying out ball-milling on the hydrothermal reaction product, deionized water, a binder and a dispersant and uniformly mixing to obtain a slurry; 5, adjusting pH value and carrying out spray-drying treatment to obtain aggregates; and 6, sintering and screening to obtain the low-cost hollow spherical YSZ powder for plasma spraying. According to the invention, preparation of the hollow spherical powder is realized by controlling dispersibility of the slurry for spray drying. The YSZ powder prepared by the above method has a hollow spherical structure with a full tetragonal phase, has excellent performance, has low cost and has remarkable popularization value.

The invention discloses a preparation method of an aluminum-coated spherical lithium nickel cobalt aluminum oxide cathode material for a lithium-ion battery. The method comprises the following steps: firstly, dissolving an aluminum salt into water, and adding ammonia water to obtain sediments; dispersing the sediments, adding nitric acid to peptize the sediments, and ageing the product to obtain aluminum hydroxide gel; adding a nickel-cobalt mixed metal salt solution and the aluminum hydroxide gel, adding a complexing agent and a precipitant for reaction, and carrying out suction filtration, washing and drying to obtain inner spherical nickel cobalt aluminum hydroxide precursor powder; dispersing the precursor powder, carrying out precipitation with an aluminum salt solution and ammonia water and preparing an aluminum-coated spherical nickel cobalt aluminum precursor; mixing a lithium source and the aluminum-coated spherical nickel cobalt aluminum precursor evenly; and sintering the mixture, so as to obtain aluminum-coated spherical lithium nickel cobalt aluminum oxide powder. The nanoscale aluminum-coated lithium nickel cobalt aluminum oxide material with a constant crystal structure is prepared; and the lithium nickel cobalt aluminum oxide material with high tap density, high specific capacity and excellent cycle performance is obtained.

The invention provides an aluminum matrix composite, and a preparation method of the aluminum matrix composite based on 3D (three dimensional) printing. The aluminum matrix composite is prepared by preparing a ceramic porous body blank via the 3D printing, performing solidification and sintering on the ceramic porous body blank, and performing pressure infiltration. The method comprises the stepsof forming the ceramic porous body blank for the aluminum matrix composite via a 3D printing technology, putting the ceramic porous body blank in a carbon dioxide atmosphere or an air atmosphere for solidification, performing integrated degreasing-sintering treatment in an air furnace to form a ceramic porous body for the aluminum matrix composite, and adopting a pressure infiltration method to prepare the aluminum matrix composite. The method can solve the problems of long technical flow, complicated procedure, high cost, limited product size and the like of the existing powder metallurgic method. At the same time, the method avoids the problems of high possibility of mixing of gas and impurities, and high possibility of segregation and 'caking' due to addition of ceramic particles in theexisting stirring casting method. The 3D printing technology can effectively shorten a research, development and production period of the ceramic porous body.

The invention discloses a three-dimensional group unmanned aerial vehicle parallel type multi-target search cooperative operation method. The method comprises the following steps that a program is initialized; one-time self-organizing division is completed according to a multi-target distribution model of the response threshold; on the basis of a multi-target distribution model of sub-group scalehomogenization, resource allocation inside the sub-groups is carried out, and secondary distribution is completed; fine-grained target search is carried out by adopting an adaptive inertia weight extended particle swarm algorithm based on kinematics constraint characteristics; if the unmanned aerial vehicles in all the subgroups are close to the search target, the search is considered to be successful, otherwise, iteration is continued, and the positions and speeds of the unmanned aerial vehicles are continuously updated, a group unmanned aerial vehicle parallel search performance index evaluation model is established, and then convergence proving and analysis on the evaluation model is carried out. The method is advantaged in that parallel search efficiency of the group unmanned aerial vehicle is improved, problems that particles are prone to falling into local optimal points and search efficiency is too low are effectively solved, and system energy consumption and search time consumption are greatly reduced.

The invention discloses a catalyst for preparing propylene by disproportionation of ethylene and butane. The catalyst consists of 1-15% of active components and 85-99% of a carrier, wherein the active components comprise oxides of tungsten, molybdenum and rhenium; based on 100% of the total weight of the active components, the active components contain 80-100wt% of tungsten, 0-20wt% of molybdenum and 0-1wt% of rhenium; and the carrier is a zirconium oxide modified silicon dioxide carrier. The invention further discloses a preparation method of the catalyst. The preparation method comprises the following steps of: firstly, roasting a silicon dioxide carrier for 2-6 hours; then, dipping the roasted silicon dioxide carrier into a soluble zircon salt solution; subsequently, drying and roasting for 2-6 hours to obtain the zirconium oxide modified silicon dioxide carrier; then, dipping the zirconium oxide modified silicon dioxide carrier in a salt solution of tungsten, molybdenum and rhenium, and drying to obtain a carrier the surface of which is loaded by tungsten, molybdenum and rhenium; then, immobilizing the active components on the surface of the carrier through 0.1-6 M of an acidic precipitator, drying, and roasting for 2-6 hours so as to obtain the catalyst. The catalyst disclosed by the invention is high in catalytic efficiency and good in propylene selectivity.

The invention provides a near-field direct-writing device based on a composite receiving plate. The near-field direct-writing device based on the composite receiving plate comprises a high-voltage power supply, a pushing injection system, a temperature control system, a movement control system and the composite receiving plate. The pushing injection system is filled with printing materials, and a needle of the pushing injection system perpendicularly points to the surface of the composite receiving plate; the composite receiving plate comprises an electric conductive receiving plate and an insulation layer, and the side, facing the needle, of the electric conductive receiving plate is covered with the insulation layer; the high-voltage power supply is connected with the needle and the electric conductive receiving plate, so that a high-voltage electric field is formed between the needle and the composite receiving plate; the temperature control system controls the temperature of the pushing injection system and the composite receiving plate; and the movement control system controls the composite receiving plate to freely move along an X axis, a Y axis and a Z axis. According to the near-field direct-writing device, flow jetting positioning accuracy in a near-field direct-writing technology can be improved, and consequently, forming accuracy of a 3D printing technology based on the near-field direct-writing technology is improved.

The invention discloses a low-carbon alkane dehydrogenation olefin preparation catalyst and a preparation method of the catalyst. The catalyst comprises an active component, an auxiliary agent and a carrier, the active component is one or more of Fe, Co, Ni, V, Mo, Cr, Mn, Cu or Zn, the auxiliary agent is one or more of IA group, IIA group, rare earth elements, Al, Ti, Zr, Nb and Ga, and the carrier is silicon-based modified petroleum coke-based activated carbon. The preparation method comprises the following steps: (1) pretreating petroleum coke; (2) preparing silicon-based modified petroleumcoke; (3) preparing a composite oxide containing an active component and an auxiliary agent; (4) uniformly mixing the silicon-based modified petroleum coke, the composite oxide and an activating agent, and activating same; and washing and drying the sample obtained in the step (4) to obtain the catalyst. The prepared catalyst has the advantages of good active component dispersion, high utilization rate, high low-carbon olefin selectivity and the like.

The invention relates to a method and a device for processing metadata of an object in a distributed storage system, which relates to the technical field of storage and can solve the problem of unevendistribution of metadata of the object. The bucket of the distributed storage system includes at least two logical sub-buckets, the at least two logical sub-buckets are mapped to different partitions, a first logical sub-bucket of the at least two logical sub-buckets is mapped to a first partition, and an index node of the distributed storage system manages the first partition. The method comprises the following steps: a service node of a distributed storage system receives an IO operation including a name of a bucket and a name of a first object; The service node selects a first logical sub-bucket from the bucket according to the name of the bucket and the name of the first object. According to the mapping relationship between the first logical sub-bucket and the first partition, the service node sends a processing request including the name of the first logical sub-bucket and the name of the first object to the index node, and the processing request is used for requesting the metadata of the first object to be processed in the first partition.

The invention discloses a user flow distribution method and device, is applied to the technical field of the Internet, and is used for solving the problems of non-uniform user flow distribution and fixed distribution proportion. The method specifically comprises the following steps of: obtaining hash seeds of each flow experiment; carrying out hash operation on the user identifier of the user flow; obtaining a hash value of each flow experiment corresponding to the user identifier; for various flow experiments, when it is determined that the hash value of the user identifier corresponding to the flow experiment hits the sub-flow interval corresponding to any control experiment in the flow experiment, distributing the user flow to any control experiment. Therefore, the hash operation is carried out on the user identifier of the user flow; the user flow is distributed according to the hash value, the user flow can be uniformly and randomly distributed, and the flow proportion of each control experiment can be flexibly configured, so that the problem of fixed distribution proportion is solved, the influence of non-uniform user flow distribution and fixed distribution proportion on anexperiment result is reduced, and the accuracy of the experiment result is improved.

The invention discloses a metal plating method for carbon nanotubes. Mainly, the method adopts low-carbon-number alcohol solvents and surfactants having a functional group of thioalcohol or sulfonic acid and uses ultrasonic vibration to fully disperse the carbon nanotubes in electroless plating surface to completely coat a plating layer on the surfaces of the carbon nanotubes, thereby solving the problem of uneven plating layer distribution caused by the aggregation of carbon nanotubes in the prior art.

The invention, specific to the problem that a flue gas flow field in an absorption tower is nonuniform so that desulfurizing reaction efficiency is decreased, provides a dual-scale dynamic feedback homogenizing system for a flow field. The system comprises a horizontal dynamic rectification component, a longitudinal dynamic rectification component and a fixed diversion unit, wherein the horizontaldynamic rectification component and the longitudinal dynamic rectification component both comprise a flow field adjusting unit and a feedback control unit; the system is installed at an upstream flueof the inlet of the absorption tower, a longitudinal flow field adjusting unit is installed at an inlet segment, which is close to the adsorption tower, of a joining flue in front of the tower, a horizontal flow field adjusting unit is arranged at the upstream of the vertical flow field adjusting unit, and the fixed diversion unit is installed in a swerving flue in front of the tower; the flow field adjusting unit is provided with a blade group for adjusting a flow field, the feedback control unit is used for collecting flow field information at the downstream of the flow field adjusting unit, the angle of deflection of the blade group is adjusted according to feedback information, and the system can be used for realizing homogenizing adjustment of the flow field.

The invention provides a magnetball distributing plate for a fluidized bed, belonging to the technical field of a fluidized bed reactor. The device comprises a distributing plate which is formed by the means that magnetballs are regularly arranged on a support frame at the bottom of a reactor bed, the magnetballs are regularly and tightly arranged and are fully distributed on the support frame at the bottom of the reactor bed, and the magnetballs are distributed into monolayer or multilayer. The magnetic mutual attraction force between every two magnetballs is not less than 10N. Gas or liquid can be evenly and stably distributed after passing through the device, the magnetball distributing plate can be widely used in the technical fields such as gas-solid reaction, liquid-solid reaction, catalytic reaction and the like, and the problem that the gas can not be evenly distributed after passing through the distributing plate can be overcome. The regular magnetballs are taken as the distributing plate, so that the gas can be completely and evenly distributed after passing through the distributing plate, and the reaction time that the gas passes through a fluidized bed can be effectively controlled, therefore, the reaction efficiency can be improved, and the yield of the product can be improved.

The invention provides a separation and recycle system for water-containing organic waste liquid and organic solvents as well as a recycle method, wherein the separation and recycle system consists ofa distillation system and a pervaporation membrane separation system through process pipeline connection. A packed tower is adopted as a rectifying tower, and the material inlet of the packed tower is arranged in the center of a packed tower liquid distributor. A damping structure is arranged in the pervaporation membrane unit of the pervaporation membrane separation system. The separation and recycle system provided by the invention is suitable for online dehydration and recycle of multiple kinds of water-containing and two or more than two azeotropic or non-azeotropic organic solvents as well as for separation and reuse of the organic solvents.

The invention discloses an in-situ formation TiC reinforced high-chromium cast iron wear-resistant material and a preparation method thereof. Specifically, the preparation method comprises the steps that Ti3AlC2 and high-chromium cast iron powder are taken as raw materials, wherein the content of Ti3AlC2 is 5-30wt.%; an agate ball and ingredients are put into a ball milling tank according to the weight ratio of 2:1 for mixing for 5-10 hours; the mixed ingredients are put into a graphite mould, the graphite mould is placed in a high-temperature furnace, under an argon atmosphere, the temperature of the furnace is increased to 1200-1500 DEG C by taking the heating rate of 5-30 DEG C/minute, after the temperature is kept for 0-30 minutes, then the temperature is cooled to 1000-1300 DEG C, meanwhile, the pressure of 0-30 MPa is applied to the powder in the mould, the temperature is kept for 30-90 minutes, and finally the temperature is cooled to room temperature along with the furnace temperature, and the TiC reinforced high-chromium cast iron composite material is obtained. The TiC particles in the material prepared by the method are fine and uniformly distributed in a base body, thestructure of the high-chromium cast iron is refined, relatively high ceramic/metal bonding interface is formed between the TiC and the base body, and the comprehensive performance of the composite material is improved. The method has the advantages that the used equipment is simple, the time for compounding the material is short, and the method is suitable for large-scale production.

The invention discloses a compound phase-change material target and a preparation method thereof. The compound phase-change material target is prepared by compounding a phase-change material and another material. While in preparation, firstly, the material with higher melting point is prepared into cylindrical shape and then is taken as a matrix; an etching process is utilized to prepare cylindrical pores with the same size and shape and even distribution on the matrix; then the material with lower melting point is filled into the pores; the two materials are combined together through a vacuumhot press sintering process, and finally, a mode of mechanical polishing is utilized to treat the surface, and therefore, a smooth, even and compact compound phase-change material target is obtained.Each component in the compound phase-change material target prepared by the method has even distribution, and the constituent can be modulated according to the size and the density of the pore, thereby solving the problem that each component of the compound material target is not evenly distributed; and the target adopted to prepare a film material is beneficial to evenly compounding two different materials, and therefore, the complexity and the instability of a multi-target cosputtering process are avoided.

The invention relates to the technical field of kiwi fruit, and discloses precise kiwi fruit juice constant-pressure dripping equipment. The precise kiwi fruit juice constant-pressure dripping equipment comprises a box body I and a constant-pressure dripping mechanism; the constant-pressure dripping mechanism comprises a motor, a fixing block, a moving rod, a screw rod, a connection rod, a pressing plate, a sealing sleeve, a material inlet shield, a material inlet pipe, a material outlet pipe I, a box body II and a material outlet pipe III; and the motor is arranged on the top of the box bodyI. according to the precise kiwi fruit juice constant-pressure dripping equipment, through arrangement of the motor, the screw rod, the fixing block, the moving rod, the connection rod, the pressing plate and the sealing sleeve, the motor starts to drive the screw rod to rotate; the screw rod rotates to drive the connection rod to lift so as to drive the pressing plate to lift; the pressing platepresses liquid in the box body I; the pressing plate descends at constant speed, so that liquid which is sprinkled through a dripping head is uniformly outlet; the aim that kiwi fruit juice can be uniformly sprinkled from the bottom of the dripping head; and the problem in the prior art that during canning of the kiwi fruit juice, the flowing speed is unstable, so that the distribution of the kiwifruit juice in the bottom of a can is not uniform is solved.

The invention discloses a target detection method based on improved Mixed Pooling-YOLOV3, and the method carries out the design of a target detection algorithm based on the idea of regression, and achieves the multi-scale and multi-label classification. Based on the defects of a current one-stage target detection method YOLOV3, a DPM network based on a Darknet-53 structure is designed as a featureextractor; and secondly, an original loss function is reconstructed, and meanwhile, parameters of the original loss function are optimized, so the detection precision is effectively improved, and convergence is quicker. The DMP framework gives consideration to the complexity of the network and the accuracy of detection; compared with a common target detection feature extraction network VGG-16, the method has the advantages that the model calculation amount is reduced, the latest progress of computer vision is introduced into the field of target detection, the detection precision and the detection speed are good, and meanwhile, the method has better performance and popularization and application prospects.