282results about How to "Solve the disadvantages" patented technology

The invention discloses an experiment teaching system based on a cloud desktop. The experiment teaching system based on the cloud desktop comprises a virtualized server resource pool, wherein a plurality of physical servers are arranged inside the virtualized server resource pool; each physical server is provided with a plurality of virtual machines; a cloud desktop experimental terminal is connected with the physical servers in the virtualized server resource pool through a desktop net interchanger; a main management server is connected with the physical servers through a management net interchanger and is further connected with the desktop net interchanger; a storage server is connected with the physical servers through a storage net interchanger; the physical servers is connected with at least one application server through an application net interchanger. The cloud desktop remote access and the virtual machine technology are utilized, hardware cost and maintenance cost are effectively lowered, and the resource utilization rate is improved. The cloud desktop experimental terminal is low in configuration demand and high in universality and flexibility. The standardization and refinement of the experiment teaching process are improved, safety is high, and the supervision and administration capacity of experiment teaching is enhanced.

The invention discloses a permanent-magnet-synchronous-motor sensorless control system. In permanent-magnet-synchronous-motor vector control, according to a Luenberger observer principle, a PMSM rotor speed and position estimation method based on a Luenberger observer is provided so that some disadvantages of a permanent magnet synchronous motor because of installation of a mechanical sensor are effectively overcome. A Matlab / Simulink tool is used to construct a control system simulation model and carry out simulation verification. A simulation result shows that the control system possesses good control performance. Finally, algorithm realization is performed on a hardware system taking STM32F103ZET6 as a control core. An experiment result shows that the permanent-magnet-synchronous-motor control system based on the Luenberger observer possesses high control precision and stability is good.

The invention discloses an AGV intelligent dynamic scheduling method in a workshop environment, comprising the following steps: an agent-based workshop AGV scheduling mode is built; an initial scheduling sequence of machined work pieces is acquired based on a genetic algorithm and input to a database; a device agent quires the database to get a transport task, gets a fault-free AGV list from a management agent, initiates a tendering process, and releases the transport task; an AGV agent participates in tendering based on a beat mechanism, and AGVs' inferior competitive bidding under the condition of multi-device concurrent tendering is avoided based on the beat mechanism; the device agent evaluates the AGV tendering result; the AGV agent receives the competitive bidding result, and makes a plan for next step; and if there is AGV fault disturbance, the management agent handles the disturbance. Real-time intelligent dynamic scheduling of multiple work pieces and multiple tasks in a workshop production environment is realized effectively.

The invention provides an automatic matching method for radio frequency channels of a multichannel distributed antenna system. The automatic matching method for the radio frequency channels of the multichannel distributed antenna system comprises steps of diving optical fiber transmission resources into a plurality of signal transmission units which have fixed bandwidth and mapping to any radio frequency channel; setting up a carrier wave information chart through a main AU (Access Unit) according to configuration information of the radio frequency channels and sending the information chart to all RUs (Remote Units); setting up a mapping list of main AU radio frequency channels and the signal transmission units through the main AU according to the carrier wave information chart; setting up a mapping list between auxiliary radio frequency channels and the signal transmission units when the carrier wave information chart is received; setting up a mapping list between the radio frequency channels and the signal transmission units according to the operating frequency band range of a power amplifier module of a local machine and in combination with carrier wave configuration information when the RUs receive the carrier wave information chart form the main AU. The automatic matching method for the radio frequency channels of the multichannel distributed antenna system has the advantages of providing a carrier wave free dispatching method for a multimode and multi-standard DAS (Data Acquisition System), increasing the extendibility of the system and enabling few parts to be changed for a same set of software and hardware system to satisfy networking requirements of various application scenarios.

The invention relates to the field of stamping dies, especially the continuous die blanking method used in cold stamping production. During punching, the stripper plate goes down, so that the elastic inserts go down together, and at the same time, the spring is compressed and presses the stripper plate and the stripper plate. The material in the middle of the elastic block is then punched out. After the mold is closed, the punching is completed, the stripper plate goes up, the compressed spring returns to its original state, and the elastic block is ejected to make the material separate from the punch. Avoid the upper part of the cutting edge block, and the punched waste goes out from the empty position, and the blowing device blows the punched waste from the cutting edge block to complete the continuous upward punching of the mold, which solves the problem of special structure products. The lower die cannot be used as a cutting edge or can be made into a cutting edge, so it is very easy to chip, generate burrs, and cannot complete continuous blanking, which meets the production needs, reduces production costs, and improves production efficiency.

The invention provides a lithium battery capacity online prediction method based on K-means clustering and an Elman neural network. The method comprises the following steps: firstly, determining the model of a lithium ion battery to be tested, carrying out cyclic charging and discharging experiment by utilizing a battery with the same model as the battery to be tested, recording a lithium batterydischarging time sequence, carrying out K-means clustering on the lithium battery discharging time sequence, and establishing a data model; and then, introducing a simulated annealing genetic algorithm to optimize initial weight and threshold of the Elman neural network, training the Elman neural network by using the constructed data model, and establishing a lithium ion battery actual capacity prediction system offline. When capacity prediction is carried out online, the collected actual discharging time sequence data of the lithium ion battery to be tested is input into the prediction system, and the actual capacity of the battery is predicted while the normal work of the lithium ion battery is not influenced. According to the invention, online accurate prediction of the actual capacityof the lithium ion battery can be realized.

The invention provides a POE switch testing device and a detection method thereof. The POE switch testing device comprises a temperature and humidity adjusting box; a POE switch system disposed in the temperature and humidity adjusting box; a POE system detection tool module connected with the POE switch system, arranged outside the temperature and humidity adjusting box, and used for detecting the power supply function of the POE switch system; an IP network camera connected with the POE switch system and arranged outside the temperature and humidity adjusting box; a temperature acquisition module connected with the POE switch system and used for detecting the temperature rise state of the POE switch system; and a PC arranged outside the temperature and humidity adjusting box, connected with the POE system detection tool module and used for detecting the data packet transmitting and receiving function of the POE switch system. The POE switch testing device solves the defects and the abuses of a conventional detection system using single AC voltage and power frequency by using different AC voltage and power frequency according to users at different regions.

The invention relates to a fabricated section-adjustable formwork system for square stiff pillars. The fabricated section-adjustable formwork system is of a rectangular structure formed by four surface formworks. Every two surface formworks are connected with each other through angle-steel positioning members. A plurality of evenly distributed rectangular grooves are formed in each angle-steel positioning member vertically. A plurality of limiting cross beams are arranged on the outer surfaces of the surface formworks. Two ends of each limiting cross beam are located in the corresponding rectangular grooves, and are vertically connected with the corresponding limiting cross beams on the adjacent surface formwork. Each surface formwork is formed by connection of a plurality of standard unit formworks and a non-standard unit formwork. Each limiting cross beam is formed by inserted connection of outer square steel and inner square steel, and the length of each limiting cross beam is adjusted according to the width of the corresponding surface formwork. The formwork system has the advantages that during turnover, damage degree is low, construction speed is high, auxiliary measures are few, and requirements on operation levels of operators are low; the formwork system is applicable to construction requirements of section changes of the square stiff pillars, is environment friendly and has high economic and social benefits.

The invention discloses a wireless mobile nursing ward-round system and use method thereof. The system comprises a middle-tier server, a HIS server, an EMR server, a bar code, a PDA client, a data information entry module and an information storage module, wherein the middle-tire server is respectively connected with the HIS server, the bar code, the PDA client and the data information entry module through a wireless network way; the EMR server is connected with the data information entry module through the wireless network way; the bar code and the PDA client are connected with the information storage module through the wireless network way; and the PDA client is connected with the data information entry module. The wireless mobile nursing ward-round not only can reduce the expenditure of the consumable costs, but also can reduce the nurse staffing and reduce the hospital day of the patient by improving the working efficiency of the nurse, so that the hospital can obtain good economic benefit and social benefit.

The invention provides a self-adaptive fuzzy force tracking control method based on multi-robot cooperative operation. The method comprises the steps of 1, through position information of a target operation object, according to position constraint formed by a closed chain, solving a constraint equation of the tail end coordination position of each robot to obtain the tail end expected pose of eachrobot; 2, according to each robot, carrying out inverse kinematics solving, and solving joint rotation angle control instructions needed for executing cooperative operation of each robot to obtain the expected angle of each current joint of each robot; 3, establishing an admittance control model, and carrying out force tracking control over multiple robots; and 4, introducing the learning rate eta into the established admittance control model, carrying out self-adaptive adjustment on eta through a fuzzy controller according to dynamic changes of the target operation object, and carrying out force tracking control over the multiple robots. When the multiple robots carry out cooperative operation under closed chain constraint, the robots can compensate for tracking errors in time, and forcetracking precision is improved.

The invention discloses a bridge crane energy coupling controller and control method with initial input constraint. A generalized load horizontal displacement signal is established, so that the coupling relation among trolley movement, lifting hook swinging and swinging around a lifting hook of a load is enhanced, and the transient state control performance of the controller is improved. A hyperbolic tangent function is introduced into a control rate, and initial drive force is lowered greatly by means of the control method, so that smooth starting of a trolley is guaranteed, and great swinging of the load is avoided. Strict mathematical analysis is carried out on the stability of a closed-loop system at a balance point by means of a Lyapunov method and a LaSalle invariance principle. It is indicated by the results that the control algorithm has good control performance and has very high robustness on different load mass, rope lengths, target positions and external disturbances.

The invention belongs to the field of new energy vehicles and in particular relates to a buried charging device and a charging method in the field. The buried charging device comprises a control host, a buried charging pile and a charging plug, wherein the buried charging pile is connected with the control host, and the charging plug is arranged on the buried charging pile; the buried charging device is characterized in that a plurality of sensors are arranged on the buried charging pile; the sensors are connected with the control host; a sign connected with the control host is arranged; and the charging plug on the buried charging pile is connected with a lifting device. The buried charging device can achieve that one host controls the plurality of buried charging piles; and as charging port automatic connection is adopted and the buried charging pile does not occupy any ground road, defects of the various traditional charging piles are effectively avoided, the bottleneck restricting the development of the electric vehicles is solved and the charging pile can be rapidly developed.

The invention discloses a dual-power driving system configuration for an electric tractor. The system comprises a rear power output shaft PTO transmission box, a rear axle differential, a rear deceleration transfer integrated box, a front axle driving motor, a front axle differential, a front deceleration box and a rear axle driving motor. Various defects of fuel energy can be overcome, existing limitation of insufficient power caused by a single motor can be broken through, high-housepower output is realized, and high power output needs are met; the dual-power driving system configuration canrealize two functional forms, namely functions of independent PTO and dependent PTO, of PTO output of the electric tractor, and an electric tractor with a single-drive motor does not have this characteristic; due to distributed control of the dual-motor configuration, front drive, rear drive and four-wheel drive operation conversion can be realized according to different agricultural working condition needs, and sliding during field operation can be reduced effectively.

The invention relates to the field of papermaking, and discloses a sludge paperboard and preparation thereof. The papermaking sludge paperboard is prepared from papermaking sludge and short fibers serving as raw materials. By breaking through sludge papermaking technology and solving the strength problem of the sludge paperboard, 100 percent of papermaking sludge is recycled and the pollution problem of spinning waste, namely the short fibers is partially solved; and the formed sludge paperboard product can replace a thick paperboard and has obvious cost advantage.

A moisture-proof, heatproof, size-stable, deformation-free and anti-cracking solid wood floor processing method provided by the invention relates to the technical field of building materials. By the adoption of a wet-heat resistant, anti-deformation and anti-cracking key technology, a solid wood floor blank is completely immersed in a container filled with a waterproof moisture-proof substance in a liquid state of 35-95 DEG C, and simultaneously a pressure of 0.2-1.5Mpa is applied for 24-72 hours so as to make the waterproof moisture-proof substance to be permeated into the inside of the solid wood floor blank; and after the solid wood floor blank is taken out and infiltrated, the solid wood floor blank is dried and processed according to specification requirements so as to manufacture the moisture-proof, heatproof, size-stable, deformation-free and anti-cracking solid wood floor product. The waterproof moisture-proof substance comprises, by weight, 0-100% of wax and 0-100% of dry plant oil, is used in wet-heat resistant, anti-deformation and anti-cracking processing of wood floor, and can be used to make solid wood floor moisture-proof, heatproof, size-stable, deformation-free, anti-cracking and durable.

The invention belongs to the field of software reliability forecasting, and particularly relates to a software reliability forecasting method based on selective dynamic weight neural network integration. The software reliability forecasting method mainly includes the steps: A, generating neural network individuals: selecting Elman neural networks as network individuals and generating n neural network individuals by a Bagging algorithm; B, optimizing the individuals: firstly, determining the cluster number of the generated neural network individuals by a K value optimization algorithm, secondly, clustering the neural network individuals according to a K-mean clustering algorithm to increase individual difference, and finally, integrating the clustered individuals; C, building a dynamic model: building a dynamic weight model based on a fuzzy neural network by the aid of errors of fitting data of the optimized individuals; and D, performing integrated output: combining forecasting results of the optimized individuals with weights generated by the dynamic weight model to generate final forecasting results. A neural network integration algorithm is applied to software reliability forecasting, and the software reliability forecasting method has the advantages of high precision and fine stability.

The invention discloses an intelligentized pregnant sow feeding management system which comprises a feeding trolley, an inducing trolley, a gate, positioning electronic tags, a trough, a positioning fence, a rest and activity area, a wireless handheld data manager and a pig farm data manager. An electronic tag is arranged on one ear of each sow, and sows can move or rest in the rest and activity area at ordinary times. The wireless handheld data manager and the pig farm data manager have wireless communication functions, the wireless handheld data manager further has a function of reading the electronic tags on the ears of the sows, and data of all the sows with the electronic tags on the ears in a pig farm can be recorded and checked in any place of the pig farm at any time through communication between the wireless handheld data manager and the pig farm data manager through wireless signals. The intelligentized pregnant sow feeding management system is capable of achieving accurate feeding, free movement and digital management of the sows, and is efficient, stable, easy to install and maintain, low in cost, convenient to use, and more beneficial to health of the sows and fetuses.

The invention discloses a method for manufacturing articles for daily use and relates to the technical field of articles for daily use. The method comprises the following steps: by employing the daily article formula key technology, taking natural emulsion, potassium oleate, 341 latex and sulfur as basic raw materials, mixing and blowing air to make the pH value be 8-9, manufacturing a mixture, adding sodium silicofluoride and zinc oxide into a foaming chamber, pressing air, stirring and mixing to manufacture a foamed material to be injected into a daily article mold to manufacture a mold block, baking and manufacturing a daily article block, performing mold stripping, washing, extruding, centrifuging, drying and dehumidifying, manufacturing a daily article semi-finished product and packaging in a cover for performing external packing, and manufacturing the daily article finished product. The method is used for manufacturing pillows, mattresses, sofa cushions, chair cushions, backrests, automobile cushions, automobile neck-pillows and the like. The product is simple in process, high in quality and low in cost and contributes to popularization.

The invention discloses a handheld hydraulic drilling machine; a water supply structure is installed on a machine body; water flowing channels for supplying the water are formed in a drill stem and a drill bit; when the machine works, the high pressure water flows out from a water outlet of the drill bit to assist rock drilling and simultaneously cools the drill bit, and carries out dust falling treatment on environment, and trouble shootings can be carried out in a manner of a forward-reversal rotation of the drilling machine and pressing of the high pressure water in jamming of a drilling tool; a hydraulic support claw is further installed on the machine body and can be used for locating the machine body at a rock drilling position so as to provide a support force and simultaneously assist the machine body to exert a pressure on the rock drilling position by a self weight of the machine body, thereby improving the convenience in operation and reducing the labor intensity. According to the drilling machine, the shortage brought by a pneumatic rock drill to which working air is supplied in a long distance to cause a loss is solved, and the purposes of improving the working environment, and reducing the equipment cost and the maintenance cost are achieved; meanwhile, profit reduction caused by using a lot of air compressors is avoided; and the risk of using a lot of high-pressure pressure containers is reduced.

The invention discloses a method and a system for achieving web application acceleration of a content distribution network node, which ensure the stability and the timeliness of data transmission. The technical scheme is that after optimization, the real-time web application acceleration scheme still maintains the support on the original scheme, meanwhile, an efficient and real-time web application acceleration scheme based on the WebSocket protocol is additionally brought forward, and is characterized in that the real-time part and the non-real-time part in the web application are separated, the non-real-time content in a client side is obtained through the HTTP protocol, and the real-time content is obtained through the WebSocket protocol.

The invention discloses a changeable retractor device for a railroad bridge. A waterproof ribbon can be conveniently changed under a track base plate or a track bed under the condition of keeping normal use of a top track structure. The device comprises a pair of connection strips (20) fixed on two side walls of a contraction joint (60) via an anchorage member (40) and a waterproof ribbon (10) with two edges connected with the connection strips (20), wherein the connection strips (20) are provided with anchorage grooves (21) stretching towards a full length direction. Downward convex anchorage location bosses (11) are arranged at two edges of the waterproof ribbon (10), and the section shapes of the anchorage location bosses (11) are matched with the section shapes of lower grooves (21a) of the anchorage grooves (21); two edges of the waterproof ribbon (10) are pulled into the anchorage grooves (21) from the longitudinal ends of the connection strips (20); and a lock strip (30) is pressed in a gap between the upper surface of the waterproof ribbon (10) and the tops of the anchorage grooves (21) so that the waterproof ribbon (10) is in anchored connection with the connection strips (20).

The invention relates to a cooling system for grinding process of a grinding machine, in particular to a dry-cold grinding device for the grinding machine. The dry-cold grinding device for the grinding machine comprises an infrared thermo detector, a controller, a nozzle and an air cooling mechanism. The infrared thermo detector and the nozzle are arranged over a grinding area where the grinding wheel and work piece are engaged with each other; the nozzle is connected with the air cooling mechanism; and the infrared thermo detector outputs signals and then connected with the controller after the signals are converted into voltage signals, and the controller controls the flow output to the nozzle by the air cooling mechanism. The air cooling mechanism comprises an air compressor, an air storage cylinder, an air drier, an air purifier, an air refrigerating unit and a flow adjusting valve, which are sequentially connected; and the output end of the flow adjusting valve is connected with the nozzle, and the controller outputs signals to be connected with the flow adjusting valve. The device takes hypothermal compressed air as a cooling medium to remove the heat produced in the grinding process, thereby overcoming the defects caused by a grinding fluid, improving the working environment and reducing the production cost.

The invention discloses a bottom opening type flap gate and a water storing and draining method implemented by the same. The bottom opening type flap gate comprises a dam, a gate leaf supporting seat, a gate leaf shaft, bottom water-stop rubber, a gate leaf, a sliding shaft, a slide rail, side water-stop rubber, a hydraulic cylinder, a strut, a cylinder shaft, a cylinder supporting seat, a strut shaft, a strut supporting seat, a hydraulic system, a buttress, a sealing block and a poured adjusting layer. The bottom opening type flap gate and the water storing and draining method have the advantages that the bottom opening type flap gate and the water storing and draining method are applicable to storing and draining water for river channels, a gate can be opened during water storing and can be closed during water draining completely by means of controlling the hydraulic system, and is supported by the strut when in closed or open state, and the hydraulic system is in a closed state, so that the hydraulic cylinder can be prevented from being stressed for a long time; the gate can be opened until the gate leaf is in a horizontal state, so that the water draining capacity can be maximized; various shortcomings such as impact damage due to objects, impurity blockage, shaking, flapping, floating and the like of the traditional flap gate can be overcome; a remote real-time monitoring effect can be realized by the aid of the hydraulic system, the bottom opening type flap gate is simple in structure, the cost is low, and technical merits are obvious.

The invention includes an arc furnace smoke-dust comprehensive disposal process and a smoke-dust catching device and a combined dust catcher. The smoke-dust comprehensive disposal process has the following steps: a semi-sealed cover and a roof clearstory are combined to collect smoke dust; a three-level wet dust catcher, a one level water washing or striking assemble and a two-level venturi dust catcher or a venturi dust catcher provided with a desulfurizing device are adopted to catch dusts; a multilevel heat-treatment water toughening settlement is carried out. The arc furnace smoke-dust comprehensive catcher of the invention adopts the three-level wet dust catching method to completely dissolve the SO2 gas contained in the gas flow carrying tiny dusts, so as to reduce the emission concentration of the SO2, which is also attributed to the good smoke collecting effect of the smoke-collecting cover.

The invention discloses a high-precision extinction ratio test method and system. The method includes the steps that when light signals are attenuated to be within a best work signal-to-noise ratio range of a light signal modulation amplitude test unit, and a part of the attenuated light signals are tested through the light signal modulation amplitude test unit to obtain a light signal modulation amplitude value; the extinction ratio is calculated according to the light signal modulation amplitude value. A method based on high-speed radio frequency signal peak-to-peak value detection is adopted, the extinction ratio of the detected light signals is converted into low-frequency voltage signals, and the aim of measuring the high-speed light signal extinction ratio at high precision is achieved on various signal code pattern and modulation format conditions in a wide signal speed range; meanwhile, the system greatly extends the dynamic range of the light signals capable of being tested, and testing precision, consistence of repeated tests and work stability of a test device are improved.

The invention relates to a method for manufacturing a high thermal conductivity metal-base copper-clad plate, belonging to the technical field of a circuit board. The method takes high thermal conductivity glue as key technology, and comprises the steps of: spreading the high thermal conductivity glue prepared by magnesium hydroxide, aluminum oxide, boron nitride, epoxy resin, acetone and dicyandiamide on the back of a copper foil, putting the copper foil spread with the high thermal conductivity glue on a metal base plate after drying and cutting, laminating the copper foil on the metal base plate, sticking a protective film on the copper foil, then trimming, examining and packaging, and finally, obtaining the finished product of the high thermal conductivity metal-base copper-clad plate. The high thermal conductivity metal-base copper-clad plate is used for the circuit board of a light-emitting diode (LED) lamp, an igniter, a power supply, a backlight lamp or the like with high power and heat dissipation performance. After the method is adopted, the product quality is good, the cost is low, the technical process is simple, the interlayer binding force is good, and the method is environment-friendly and beneficial to being popularized and applied.

The invention discloses a manufacturing method of a negative oxygen ion carbon crystal and carbon fiber infrared heating wallpaper mural, and relates to the technical field of heating of heating paper (film). A key technology of setting a heating carbon crystal layer is adopted, the negative oxygen ion carbon crystal and carbon fiber infrared heating wallpaper mural used as a mural layer, a wallpaper layer, a heating carbon crystal layer and an insulating layer are adhered in sequence; the two sides of the heating carbon crystal layer are electrically connected with wires; the method comprises the following steps: back-coating and drying heating carbon crystal colloid prepared from 1-30 parts by weight of nanometer carbon crystal powder, 1-15 parts by weight of carbon fiber chopped fiber, 1-5 parts by weight of graphene, 1-20 parts by weight of tourmaline, 20-40 parts by weight of flame-retardant epoxy resin, 1-2 parts by weight of dicyandiamide, 50-100 parts by weight of acetone and 5-20 parts by weight of nitrile butadiene rubber; wiring; covering with the insulating film. The wallpaper mural is used for indoor heating and decoration. The method has the advantages of simple process, good effect, low cost and contribution to generalization.

The invention provides a device making a diffusion type nitrogen-hydrogen leak detector be not affected by environmental background. The device comprises a switching valve, an air storage tank, an air inlet valve, a cover box and the diffusion type nitrogen-hydrogen leak detector. The switching valve, the air storage tank, the air inlet valve, the cover box and the diffusion type nitrogen-hydrogen leak detector are sequentially connected in series through air channels. Part of a detected object or the whole detected object is located in the cover box, the cover box is further connected with an air release valve, and a pressure controller is connected between the switching valve and the air storage tank. The device is used for helping leak detection of the diffusion type nitrogen-hydrogen leak detector, detection is not affected by the environmental background, stability, correctness and accuracy of the diffusion type nitrogen-hydrogen leak detector are improved, the defects of an existing diffusion type nitrogen-hydrogen leak detector are overcome, and the limiting requirements of the diffusion type nitrogen-hydrogen leak detector for the user site environmental background are reduced.

The invention relates to online conference, in particular to a conference exhibition system. A double-line conference exhibition system includes system management, a conference organizer user role, a value-added service module, a conference guest user role, an enterprise user role, a conference service provider user role, and attendees. Online conference and online exhibition are integrated in one system, and an opportunity and platform is created for all parties to fully display themselves.