4636 results about "Safety coefficient" patented technology

The invention provides a vehicle autonomous parking path programming method used for multiple parking scenes. The method is used for automatically parking a vehicle in a parking space through an autonomous parking system when the autonomous parking system detects the available parking space. The method includes the steps that target parking space information is detected, and a parking scene is determined; the initial state and target state of the to-be-parked vehicle are determined; a vehicle kinematics differential equation is established; state variables and control variables of the vehicle are segmented, equidistance sampling is performed on each segment according to certain time step, and to-be-optimized variables are obtained; an equality constraint, boundary constraints and inequality constraints of the to-be-optimized variables are formed; motion range constraints of the to-be-parked vehicle are formed according to the motion range limit in the parking process of the vehicle; an optimization objective is determined, and an objective function is established; and by means of a nonlinear programming solver, an optimal solution of a parking path is obtained. The vehicle autonomous parking path programming method is suitable for the multiple parking scenes, the design is reasonable, abundant information can be provided so as to control autonomous parking of the vehicle, and the security coefficient is high.

The invention provides an unmanned aerial vehicle bridge bottom surface crack detection method and system. The unmanned aerial vehicle bridge bottom surface crack detection system comprises an unmanned aerial vehicle end and a ground workstation. The unmanned aerial vehicle end utilizes an airborne laser radar and an inertial measurement unit to position an unmanned aerial vehicle and form an unmanned aerial vehicle peripheral barrier point cloud to avoid barriers and plan a path; and an airborne platform camera photographs a bridge bottom surface at a constant frequency and stores a high-definition image into a memory. The ground workstation processes the photographed image, and splices an image between bridge piers to form a large-sized bridge bottom surface image; then the edge information in the image is acquired, the morphological corrosive expansion and connection are performed on the edge to extract a complete crack, and the crack is roughly positioned by virtue of a bridge pier position at which the spliced image is arranged; and finally the crack is evaluated, and information about the crack such as a length, a width, a distribution density and the like is analyzed and measured. The unmanned aerial vehicle bridge bottom surface crack detection method and system are high in automation degree, high in efficiency, high in safety coefficient, low in cost and wide in application prospect on the aspect of the bridge bottom surface route inspection.

The invention discloses a UWB-positioning-based intelligent automobile transfer robot and a control method thereof. A traveling mechanism, a lifting mechanism, a clamping mechanism, an electrical control unit, a central control unit and a charging unit are arranged on two load-bearing faces, control can be realized through an instruction of the central control unit, and the position of a clamping arm can be adjusted in advance during traveling according to an instruction sent by a parking lot main control system; an automobile can be clamped by only a slight action when reaching a parking position. Compared with existing automobile transfer equipment, the intelligent automobile transfer robot can remarkably reduce automobile transfer time, safety coefficient in the automobile transfer process can be improved, and safe, quick and intelligent parking can be realized.

The invention relates to a steel plate surface polishing device, in particular to a steel plate surface polishing device for hardware machining. The steel plate surface polishing device for hardware machining aims to achieve the technical purposes that manual labor is not needed, the requirement for professional operation skills is not high, operation is easy, the price-performance ratio is high, the safety coefficient is high, and harm of the operation environment to health of operators is small. In order to achieve the technical purposes, the steel plate surface polishing device for hardware machining comprises a bottom plate, a first sliding rail, a first sliding block, a collection tank, a fixing stop block, a spring, a supporting rod, a first bearing pedestal, a first air cylinder, a disc and the like, wherein the first sliding rail is arranged in the middle of the top of the bottom plate. Through ingenious cooperation of the components, the effects that manual labor is not needed, the requirement for professional operation skills is not high, operation is easy, the price-performance ratio is high, the safety coefficient is high, and harm of the operation environment to health of the operators is small are achieved.

The invention relates to the field of community management, and provides a community personnel file intelligent management method. The method comprises the steps that faces are detected by using a deep learning model, and list database comparison is conducted; management and classification of community personnel are conducted by adopting a mechanism of black, white, and gray lists to achieve real-time alert of special personnel; cleaning of acquired image data is conducted to optimize and train the deep learning model; entry and exit time of the community personnel are analyzed to achieve advance warning of abnormal events; archive information of list database personnel is used for forming relevant statistical data and charts of the community. By means of a community management system, specification management of the community personnel and timely warning of the special personnel and the abnormal events are achieved to reduce work load of security personnel and effectively improve safety coefficient of the community, and community management is more intelligent.

The invention discloses a screen display data protection method and belongs to the field of computer information safety. The method includes that the triggering mechanism and the watermark information of secret-associated data and a screen data protection system are set; a user accesses the secret-associated data and trigger the screen data protection system; the screen data protection system extracts current user information, generates watermark and displays the information; a secret divulging user is searched according to the watermark information on the secret divulging document. The protection system is triggered when the user accesses the secret-associated data and generates the protection watermark with the information of the current user to display the watermark on the screen, the possibility of stealing the secret-associated data and documents through camera shooting, screenshot, picture recording and the like is effectively reduced. Once the data are disclosed, the secret divulging source can be tracked quickly according to the user information recorded by the watermark in the secret divulging document. The watermark is set to be a two-dimensional code or a bar code, the user information can be hidden, the fact that the user who steals the information avoid or remove the watermark on purpose is avoided, and the safety coefficient of the secret-associated data is further improved.

The present invention discloses remote real-time safety monitoring system for hoisting apparatus and its control method. The present invention has a remote transmission device for data transmission with the upper monitoring server, and a sensing signal acquirer for real-time acquisition of the parameter information of the hoisting apparatus. The control method is to adopt several parallel remote control threads for data processing, and includes the first setting the received data into idle data processing queue with the data monitoring and processing thread and the subsequent processing the data in the queue with the data statistics and saving thread. The monitoring system of the present invention can realize critical state alarm and emergency state control as well as understand the running state of the hoisting apparatus remotely.

The invention provides a novel relay type corridor elevator, which comprises a closed box body that is erected on a slope direction of a corridor; the closed box body is internally provided with an upper rail, a lower rail and a rail car; the rail car comprises a frame structure, an axle sliding seat, a rotating shaft, a first torsional spring and a pedal; the axle sliding seat is fixed on the frame structure of the rail car; the rotating shaft can be rotatably arranged on the axle sliding seat; a pedal shaft of the pedal is fixedly arranged on the rotating shaft; one end of the first torsional spring is fixed on the rotating shaft, and the other end of the first torsional spring is clamped on the frame structure; the rotating shaft is connected with a pedal opening and closing driving device used for driving to rotate; the pedal shaft is provided with an externally extending section; a bearing support upright rod is correspondingly arranged on the externally extending section; and the upper end of the bearing support upright rod is provided with a pedal releasing and triggering travel switch. The novel relay type corridor elevator has the advantages of high operation efficiency, greatly reduced fault rate, higher safety coefficient and good stability.

Disclosed are a computer-implemented method for determining safety factors or a safety factor formula for use in a braking model of at least one train, a computer-implemented method for determining a plurality of safety factors for use in a braking model of at least one train, and braking systems for use on trains.

The invention mainly discloses a traveling case fingerprint lock. The traveling case fingerprint lock comprises a locking bar, wherein one end of the locking bar is provided with an inwardly-concave locking groove and is embedded in a lock shell, a tapered end matched with the locking groove is arranged in the lock shell and is matched with an engaging and disengaging gear to lock the locking bar tightly, a battery is arranged in the lock shell and is connected with the engaging and disengaging gear, and a fingerprint identifier is arranged on the lock shell and is electrically connected with a fingerprint sensor which is electrically connected with the engaging and disengaging gear; when the traveling case fingerprint lock is used, a finger is only required to be placed on the fingerprint identifier, a signal is transmitted to the engaging and disengaging gear by the fingerprint sensor, and the engaging and disengaging gear controls locking and unlocking, a user does not worry key losing, the finger is only required to be placed on the fingerprint identifier for realizing unlocking, the operation is convenient and the safety coefficient is improved.

The invention relates to the technical field for the engineering of large-section tunnel, in particular to an engineering method for the double lateral tunnel of a three-arc tunnel on soft and weak geological condition, which resolves the problem of longer duration for the exposure of wall rock, easy deformation of tunnel and poor waterproof effect in existing tunnel engineering method. The invention comprises: (1) excavation of lateral tunnel; (2) lining of later tunnel: first of all, dismantle the primary support of the whole section, then pour the arc invert secondary lining and arc section secondary lining with the construction joint being configured at the lower section of the middle wall for the lateral tunnel; (3) after the circular lining a left lateral tunnel I and a right lateral tunnel II on a same section, excavate and line a middle tunnel III. This method realizes simple equipment and convenient engineering; with the construction sequence of building the lateral tunnel and then the middle tunnel, the invention gives full play to the supporting function of the secondary lining of the middle wall, so as to reduce the load borne by the primary support of the arc section of middle tunnel and elevate the safety coefficient; the invention reduces the settlement and impact on peripheral environment, so as to ensure the stability and safety of the excavation working face; small number of construction joint and high working efficiency.

The invention discloses a granular PLA modified material for FDM printing and a preparation method of the granular PLA modified material for the FDM printing, and in particular relates to a novel environmental protection PLA modified material of the FDM printing for large industry and the preparation method of the novel environmental protection PLA modified material for the FDM printing. The granular PLA modified material for the FDM printing comprises the following components in parts by weight: 100 parts of polylactic resin, 10 to 30 parts of inorganic fillers, 5 to 30 parts of polymer elastomers and 1 to 10 parts of other additives. The PLA modified material is manufactured by granulating the components through a mixing extrusion process. The product disclosed by the invention is easy to degrade, environment-friendly and non-toxic, smooth in printing, free of smells and pollution and high in safety coefficients, the printed product has the good characteristics of smooth surface, beautiful appearance, symmetry, stable dimension, difficult shrinkage and the like and is very suitable for use in an FDM 3D printer. Furthermore, waste materials in the production process can be fully recovered and recycled. According to the invention, the polymer elastomers are added, so that the durability of the product printed by using the PLA material is further better than that of the conventional PLA material, and the product further can withstand more pressure and wear.

The invention relates to an urban rail operation vehicle and in particular relates to a straddle type monorail operation vehicle with a structure comprising two pairs of wheels. The straddle type monorail operation vehicle comprises a carriage, a steering frame, an engine, a transfer case and a walking pump, wherein the steering frame is connected with an underframe of the carriage through a central pin dragging device; the steering frame comprises a framework, a secondary suspension device and a dragging device; the overall framework is of an II-shaped full-steel installed and welded plate type box structure and comprises a side beam, end beams connected to two ends of the upper part of the side beam and two vertical beams which are connected between the end beams; a motor bracket is fixed between the upper part of the side beam and the corresponding vertical beam; two independently-driven walking wheel assemblies are mounted on two motor brackets; four guide wheel assemblies are mounted on two sides of the middle part of the side beam; two stabilizing wheel assemblies are mounted on two sides of the lower part; the secondary suspension device adopts a secondary steel coil spring assembly. The straddle type monorail operation vehicle can reasonably meet the circuit requirements of monorail PC beams and is high in safety coefficient, excellent in dragging performance, simple and compact in structure, easy to maintain, stable in running and excellent in brake performance.

The invention discloses a transformer substation device maintenance safety monitoring system and method. The system adopts non-contact human body induction and wireless transceiving signal technologies. When a person approaches a device which needs to be monitored, the system carries out automatic verification on the identity of the person and makes a corresponding action and if the identity verification is successful, a camera is started to record videos of a work project, or a database takes corresponding measures of alarm check and the like so as to prevent non-maintenance personnel from approaching a dangerous device and prevent maintenance personnel from personal injuries caused by finding of a wrong target device. The database allocates operation permission electronic certificates to maintenance personnel who already obtain work tickets or operation tickets and the maintenance personnel can only enter specific allowed areas to work when wearing the operation permission electronic certificates and can maintain a device only after fingerprint verification. The transformer substation device maintenance safety monitoring system and method have the advantages of being high in spontaneity, accurate in monitoring, high in safety coefficient, reasonable in design, simple and convenient to operate and high in performance cost ratio so that the security of devices and maintenance personnel is ensured.

The invention provides a method and equipment for binding an intelligent mobile terminal and intelligent wearable equipment, and solves the problems that operation is inconvenient, a safety coefficient is low in conventional equipment binding and the like. The method comprises steps as follows: the intelligent wearable equipment has a number and can generate an encryption code, and a two-dimensional code picture is generated according to the encryption code and the number and is displayed on a screen; a related APP (application) is loaded onto the intelligent mobile terminal, the two-dimensional code picture is scanned, and then a scanning result and the number are uploaded to a server; the server judges whether transmission content is valid after receiving the data, and if the answer is positive, the uploaded data are forwarded to the intelligent wearable equipment; the intelligent wearable equipment verifies whether the data are valid after receiving the forwarded data, and if the answer is positive, a module of the intelligent wearable equipment is activated, and an activation and binding success response is sent to the server; the server binds and associates a number of the intelligent wearable equipment with the number of the intelligent mobile terminal after receiving the binding success response, and the binding operation is completed.

The invention discloses a method for calculating the slope stability safety coefficient based on strength reduction of a humidifying condition. The method comprises the steps of testing the dry density rhod, the natural moisture content omega1, and the percentage of saturated moisture content omega2 of a slope soil body sample, testing the cohesive force c and internal friction angles of samples with different moisture contents, and calculating the volume weight gamma of the samples, wherein the formula of internal friction angles is shown in the description; drawing the relation curves of the cohesive force c and the internal friction angles respectively with the moisture content omega, and obtaining a mathematic formula of a fitting relation curve; adopting a dichotomy approximation method and considering the volume weight change, and calculating the moisture content omegaF when the slope is in critical failure; calculating the slope stability safety coefficient F. According to the method for calculating the slope stability safety coefficient based on the strength reduction of the humidifying condition, anti-shearing strength of the slope soil body is reduced based on the humidifying condition, the method better conforms to the engineering practice that the moisture content of the soil body is increased, and thus the strength is lowered due to rainfall infiltration or irrigation or the like, and the shortcoming that a prior strength reduction method is not clear in mechanical concept is overcome. When strength reduction is conducted, the adverse influence of the increase of the volume weight of the soil body on the slope stability is further considered. Therefore, the method for calculating the slope stability safety coefficient based on the strength reduction of the humidifying condition is more scientific and safer.

The invention discloses a slope slipping preventing system of an electric car and a work method of the slope slipping preventing system.The slope slipping preventing system of the electric car comprises a four-channel anti-lock system, a vehicle control unit, a gear sensor, a motor controller, a motor, an accelerator pedal, a brake pedal, a hand brake switch and a gradient sensor.The accelerator pedal, the brake pedal, the hand brake switch and the gear sensor are all connected with the vehicle control unit through hard wires.The four-channel anti-lock system and the vehicle control unit are connected through a hard wire or CAN wire.The vehicle control unit and the motor controller are connected through a CAN wire.The motor controller and the motor are connected through a hard wire.According to the slope slipping preventing system, the safety coefficient of the whole car can be increased, and the slope slipping danger of the electric car is effectively eliminated.After the electric car gets into the slope slipping preventing mode, An ABS works, the motor and a battery can be effectively protected, the service life of the whole car can be prolonged, energy consumption can be effectively reduced, and driving mileage can be increased.The electric car adapts to the driving habit of a driver and can be safety driven without special operation, and the slope slipping preventing system can be fast put into use in batches.

The invention relates to an auxiliary power supply system for a motor train unit and a power supply method and a load reducing method of the auxiliary power supply system. The auxiliary power supply system for the motor train unit comprises auxiliary current transformers, a bus I, a bus II, bus connectors, a contactor box, medium-voltage loads and a low-voltage power supply system. The bus I and the bus II penetrate through the whole auxiliary motor train unit through the bus connectors on the two sides of carriages. The auxiliary current transformers and the medium-voltage loads are connected with the bus I or the bus II alternately according to the parity number of the motor train unit carriages. Part of the medium-voltage loads of the motor train unit operate in a load reducing mode or are directly disconnected when the auxiliary current transformers break down. The auxiliary power supply system operates in a parallel connection mode through the buses penetrating through the whole auxiliary motor train unit, the relative concentration and flexible arrangement eliminating mode of the motor train unit is achieved, the requirement for the redundancy of each set of auxiliary current exchanging system is low, the economic cost is greatly reduced, the power supply of the whole train unit is stable and reliable, and the passenger comfort level and the running safety coefficient of the motor train unit are guaranteed.

The invention provides a smart construction site management system based on a cloud platform, a server and a storage medium, and the system comprises a construction site module which collects work information about construction equipment and workers on a construction site; a data storage module which is used for storing the working information in a distributed manner according to the classification of workers, construction equipment and safety; a data analysis module which is used for calling the working information and carrying out real-time data analysis on the working information to generate an analysis result related to the construction equipment and workers associated with the construction equipment; a monitoring system module which is used for acquiring video information corresponding to the workers, construction equipment and safety; the cloud platform, which judges whether working personnel, construction equipment and safety on the construction site generate early warning information or not according to the analysis result and the monitored video information; and an early warning terminal which makes an early warning response according to the early warning information so asto remind the workers and construction equipment on the construction site. Through real-time monitoring, early warning feedback is analyzed in time, and the safety coefficient of construction site management is improved.

The invention relates to an automatic stamping production line for electric appliance casings. As casing parts need to be stamping/stretching-molded by multiple procedures in the existing electric appliance industry, different stamping/stretching presses are needed. Meanwhile, a large quantity of assisting labor is needed for transport, locating and the like among the procedures, so that the existing electric appliance industry also has the defects of large worker labor intensity, low safety coefficient and low efficiency. According to the automatic production line provided by the invention, four numerical-controlled stamping/stretching hydraulic machines are used for the stamping/stretching molding of casing sheets, off-line blanks are conveyed to a centering table one by one to be located after being detached by a set of disassembling and stacking manipulators, the blanks on the centering table are conveyed into a press one by one by a feeding manipulator to be stamped/stretched, the stamped/stretched blanks are taken out by a next feeding manipulator, conveyed to a next centering table to be located, sent to a next press and pressed into products, and the finished products are finally conveyed to an output machine by a discharging manipulator. The provided automatic stamping production line for the electric appliance casings is fully novel, can meet the technical requirements of electric appliance casing production and has the advantages of compact structure, simplicity in operation and convenience in maintenance.

The invention discloses a method for distributing code stream encrypting and decrypting keys in an SIP video monitoring system. In the method, in a process for calling a 3 pcc between code stream encrypting monitoring front end equipment and code stream decrypting customer premise equipment, or a process of calling a 3 pcc between the code stream encrypting monitoring front end equipment and a media server and a 3 pcc between code stream decrypting customer premise equipment and the media server, seeda, seedb and seedc, which are obtained by the monitoring front end equipment, the media server and the customer premise equipment in an identity authentication process during registration, are used as keys shared with an SIP server and identifiers, the content of an SIP signaling message bodySDP is expanded to carry the encrypting and decrypting keys, and a symmetric algorithm or asymmetric algorithm is used to guarantee the safety of the transmission of the encrypting and decrypting keys. The method has the advantages of generating different keys at each time of broadcasting, greatly improving safety coefficient, resisting replay attack and eliminating the safety hazards of the storage of the keys at multiple places.

The invention relates to a crawler belt and suction disc combined-type special walking device. The device adopts a combined integral structure with a walking crawler belt which is a synchronous belt and special suction discs which are self-designed. Through the engagement transmission between the synchronous belt and synchronous belt pulleys and the adsorption and desorption effects of the special suction discs, the device is enabled to have the function of reliably walking and flexibly steering on smooth, flat and vertical surfaces such as glass curtain walls, tile exterior walls and the like. Since the walking device adopts the crawler belt and suction disc combined structure, the walking speed is fast, the manipulation performance is good, the volume is small, the steering is flexible and the device can surmount certain obstacles. Since the desorption subsystem of the walking device adopts air-valve-type suction discs, active adsorption or passive adsorption can be realized and the walking device has the characteristics of high adsorption efficiency, high safety factor, simple structure and wide application scope.

The invention discloses a single-rail bogie central suspension device provided with an aluminum alloy connection sleeper beam. The single-rail bogie central suspension device is characterized in that a center pin is connected with a connection sleeper beam; two air spring seat holes in the lower surface of the connection sleeper beam are connected with air springs; a height adjusting device consists of a height valve, a horizontal rod, an upper spherical hinge, a lower spherical hinge, an upper double-end stud, a lower double-end stud and a helical buckle; the upper double-end stud and the lower double-end stud are reverse in rotation directions and construct a bidirectional screw-nut mechanism together with a middle helical buckle; one end of the height valve is fixed to a train body; the other end of the height valve is connected with the horizontal rod; the horizontal rod is connected with the upper end of the screw-nut mechanism through the upper spherical hinge; the lower end of the screw-nut mechanism is connected with a bogie truss through the lower spherical hinge; one end of an anti-rolling steel wire rope is fixed to the connection sleeper beam through a hoisting base; a circular block at the other end is limited through a blocking base on the truss. By adopting the single-rail bogie central suspension device, the connection sleeper beam is provided, so that the stress state of a chassis of an aluminum train body is improved greatly, and convenience is brought to height adjustment of the train body; the single-rail bogie central suspension device has a simple structure and high adjustment accuracy; the anti-rolling safety coefficient of the train body under the working condition of heavy wind is increased greatly through the anti-rolling steel wire rope.

The invention discloses an intelligent integrated device of an integrated kitchen, comprising kitchen cabints and kitchen electrical equipments, the kitchen cabints and the kitchen electrical equipments are components of the intelligent integrated device of the integrated kitchen, the device is provided with a center controller, respective electrical equipments are interconnected with a center controller circuit, centralization control by the center controller and independent work of the kitchen electrical equipments can be realized simultaneously, each kitchen electrical equipment in the intelligent integrated device of the integrated kitchen comprises a uniform power supply line, a uniform venting and heat sink passage, a uniform plumbling tube and independent smoke evacuation tubes. The kitchen electrical equipment is provided with a temperature detection member for increasing a safety coefficient, safe operation and use condition of the electrical equipments can be operated and monitored on a display screen of the center controller; the center controller also can be accessed to a network to realize network remote control. The invention completely integrates the kitchen cabints and the kitchen electrical equipments, circuits, the vent and heat sink passages are uniform, arrangement is handsome, and operation is safe and convenient.

The invention belongs to the technical field of maintenance of mine top plates, and provides an automatic subpackage and injection device of an anchoring agent cartridge to solve the technical problems of bad working environment and high security risk in maintenance of anchor rods by manual cartridge loading. The device comprises a push oil cylinder, a push rod, the anchoring agent cartridge, a cartridge storage box, an injection guide pipe, an injection hose, a positioning sleeve, a nozzle, a spring, a positioning oil cylinder and a drilling rig; one end of the push oil cylinder is connected with the back end of the push rod; the front end of the push rod is inserted in the back end of the injection guide pipe; the cartridge storage box is arranged above the injection guide pipe; an injection port is formed in the side surface of the injection guide pipe; the front end of the injection guide pipe is connected with the back end of the injection hose; the front end of the injection hose is connected with the positioning sleeve; the nozzle and the spring are arranged in the positioning sleeve; a hydraulic oil pipe is arranged at the lower part of the positioning sleeve; and the positioning sleeve is connected with the drilling rig through the positioning oil cylinder. The device is adopted to reduce the work quantity of workers, to improve the working environment and to improve the safety coefficient of the workers.

A safety stock amount calculation method includes step S8 for calculating a probability Pb that a delivery time for a certain commodity required by a customer is shorter than its lead time L, step S9 for calculating an average value LL of a difference between the lead time L and the customer's required delivery time when the lead time L exceeds the customer's required delivery time, step S10 for correcting an inventory adjustment period N by using the average value LL, and step S11 for calculating a safety stock amount SS by the equations SS=PB×k×(√{square root over ( )}N×F)×σ, wherein σ is a standard deviation of demand for the commodity, N is a corrected inventory adjustment period, Pb is a probability, F is a shipment frequency, and k is a safety coefficient.

The invention relates to the field of coal mine safety, in particular to a distributed optical fiber temperature measurement-based fire early warning method for a belt conveyor. The method comprises the following steps of: dividing a temperature measuring optical fiber into a temperature measuring point, a channel and an area, and processing temperature data measured by the temperature measuring optical fiber by an absolute temperature early warning method, an area relative temperature difference early warning method, an area normal distribution early warning method, a measuring point temperature rise slope early warning method and a measuring point temperature rise variation trend early warning method to acquire a channel threshold early warning characteristic value, an area threshold early warning characteristic value, an area relative temperature early warning characteristic value, an area temperature normal distribution statistical characteristic value, a measuring point threshold early warning characteristic value, a measuring point temperature rise slope early warning characteristic value and a measuring point temperature rise accumulated trend early warning characteristic value; inputting the characteristic values and the measuring point temperature rise accumulated trend early warning characteristic value into a back propagation (BP) neural network model; and outputting a warning coefficient, an early warning coefficient and a safety coefficient by using the BP neural network model.

The invention discloses a washing control method of a full-automatic impeller washing machine. The method comprises the following steps that: a, a computer program controller judges whether the work is a drainage work; if the work is not a drainage work, the process is over; otherwise, the step b is executed; b, in the drainage work, a water level sensor detects the water level; if the water level is equal to or lower than the no-water level, the process is over; and if the water level is higher than the no-water level, the step c is executed; c, the computer program controller controls to open a drainage valve to start drainage; and d, the computer program controller controls a motor to rotate so as to drive an inner drum to rotate according to the water level, and continuously increases the rotation speed of the inner drum along with the drop of the water level until the water level is equal to or lower than the no-water level. According to the invention, particles in the suspension can hardly attach to the drum wall, and thus the dirt accumulation is eliminated; and the motor speed is controlled, and the output of the motor is controlled below the rated power so as to improve the mechanical properties and the safety coefficient.

The invention discloses a preparation method of indium tin oxide targets. The preparation method includes taking indium tin oxide powder with the purity higher than 99.99% and the average particle size of 0.02-2 micrometers as a main material, preparing premixed liquid from pure water, water-soluble epoxy resin and dispersing agents, subjecting the main material and the premixed liquid to ball milling sufficiently to obtain slurry capable of dispersing uniformly and flowing easily, pouring, curing and drying the slurry to obtain high-intensity green bodies, and degreasing to obtain high-quality indium tin oxide targets which are of In2O3 single-phase cubic structures, have relative density reaching 99.5%, resistivity lower than 0.1megohm/centimeter and are uniform in composition. The indium tin oxide targets are high in density and can be produced in large size and various shapes; isostatic pressing treatment to the green bodies is omitted, so that production efficiency and field can be improved greatly; nontoxic water-soluble epoxy resin serves as a gel system so that production safety coefficient can be increased greatly while pollution of industrial production to environments can be lowered greatly.

The embodiment of the invention discloses a smart community management system for an edge computing server on the Internet of things, The smart community management system comprises: a perceptual layer, an operations layer, a platform layer, and an application layer; the sensing layer is comprised of a plurality of intelligent hardware, the sensing layer uploads the data of the intelligent hardware to the operation layer through the network layer, The edge computing server in the operation layer processes the data, the platform layer is a smart community cloud platform, the operation layer isconnected with the platform layer through the multicast technology, the application layer is an interactive entrance of the smart community cloud platform, and the application layer comprises a plurality of application modules to realize different interactive control. The invention solves the problems of low intelligence degree and low safety coefficient of the existing community management system.