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 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 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 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 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 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 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.