34results about How to "To achieve reasonable application" patented technology

The invention belongs to the field of high-voltage power-on and power-off control methods for automobiles, and particularly relates to a high-voltage power-on control method and high-voltage power-offcontrol method for a pure electric vehicle. Pre-charging of a PTC, DCDC circuit and MCU circuit is performed separately in a high-voltage power-on process, the MCU circuit is controlled to achieve active discharging in a high-voltage power-off process, the MCU circuit, the PTC and the DCDC circuit are controlled separately in the high-voltage power-on process and the high-voltage power-off process. When only the PTC needs to work, the MCU does not need to be powered by high voltage, thereby reducing the closing frequency of an MCU circuit contactor, and the service life of the MCU circuit contactor is prolonged.

The invention discloses a display rack for gear selling. The display rack comprises a rack body of a regular hexagonal prism shape. A plurality of gear storage cavities are sequentially arranged on the hexagonal prism surface of the rack body from top to bottom. An explanation panel is arranged on the inner side of each gear storage cavity. A base is disposed at the bottom of the rack body. A rotating device is disposed between the rack body and the base. The rotating device comprises an upper plate, a ball limiting ring and a lower plate, wherein the upper end face of the lower plate and the lower end face of the upper plate are provided with corresponding annular grooves, balls are mounted in the annular grooves, and the ball limiting ring is arranged between the upper plate and the lower plate. The display rack for gear selling has the advantages that gears of different types can be stored by the plurality of gear storage cavities, reasonable space utilization is achieved, the rack body can be rotated by the rotating device, and people can conveniently watch and compare the gears.

The invention relates to the technical field of intelligent optimization, in particular to an intelligent picking optimization system. The system comprises a map generation module, a path route planning module, a path time planning module, a time conflict optimization module and an AGV trolley, and is characterized in that the map generation module, the path route planning module, the path time planning module and the time conflict optimization module are in communication connection through software, and control the operation of the AGV trolley through wireless communication. Compared with theprior art, by providing the intelligent picking optimization system, reasonable application of the station is realized; Repeated simulation operation shows that the system can reasonably distribute the stations, reduce the workload difference of each station, and avoid the conditions that some stations are particularly busy and some stations are particularly idle (the problems existing in realityrestrict the overall efficiency of the unmanned cabin and not restrict the efficiency of the unmanned cabin due to the advantages and disadvantages of pure path planning).

The invention belongs to the field of agricultural machinery and particularly relates to a cornstalk lodging resistance tester. The cornstalk lodging resistance tester comprises a vertical plate (1), a sliding groove (2) is formed in one side of the vertical plate (1), a trapezoid slider (3) capable of moving up and down along the sliding groove is embedded in the sliding groove (2) and connected with a spring (7) mounted on the upper portion of the vertical plate, a gradienter (4) is mounted on a slope of the trapezoid slider (3), a tension meter (5) is mounted on the front end face of the trapezoid slider (3), a rope sling (6) is arranged at one end of the tension meter (5), a cardan joint (8) is mounted on the lower portion of the vertical plate (1), a pedal (9) is mounted on one side of the bottom end of the vertical plate, and fixing fork heads (10) are welded to the bottom face of the vertical plate. The cornstalk lodging resistance tester has the advantages that one worker can complete cornstalk lodging resistance testing in a field, injuries to living qualified corn plants can be avoided, and the cornstalk lodging resistance tester is convenient to use and low in manufacturing cost.

The invention discloses a deep purifying method for domestic sewage. The deep purifying method comprises the following steps of S1, primary treatment of sewage; S2, fermentation of the sewage; S3, purification of a biological pond; S4, chemical precipitation; S5, deep purification. The deep purification method has the advantages that the sewage is deeply treated by combining sewage biological purification and chemical purification, so that the characteristics of low power consumption, high quality of drained water and the like are realized; the sewage is effectively treated, the environment isbeautified, the ecology is protected, and the energy source is saved; the operation is simple, the implementing is easy, the sewage treatment cost is low, and the effect is good.

The invention relates to a sedimentation tank, which comprises a pool body, a bidirectional screw rod is rotationally connected between two opposite inner walls of the tank body; one end of the two-way screw rod penetrates through the exterior of the pool body; a motor fixedly connected with the end part of the bidirectional screw rod is arranged on the outer wall of the tank body; guide rods arearranged on the two opposite inner walls of the pool body and on the two sides of the two-way lead screw respectively; a mud scraping plate penetrates through the bidirectional screw rod and the two guide rods; the mud scraping plate is in threaded connection with the bidirectional screw rod; two opposite outer walls of the pool body are sunken inwards to form mounting grooves. In the process thatthe mud scraping plates move towards the two sides, the outer walls of the corresponding mounting grooves, the bottom wall of the pool body and the inner walls of the three sides can form a closed mud treatment space, wherein mud cleaning holes communicating with the interior of the pool body penetrate through the two opposite side walls of the pool body correspondingly, and a cover plate is arranged on the outer side wall of the pool body. A sealed sludge treatment space is formed by the sludge scraping plate, the outer wall of the mounting groove, the bottom wall of the tank body and the inner walls of the three sides, the sedimentation tank can still work when sludge is cleaned, and the working efficiency is improved.

The invention provides a control method for coolant charging of an energy storage unit (2) through a coolant charging device (1). The control method comprises a coolant charging starting step, a communicating step and a coolant charging step, wherein the coolant charging device (1) is started in the coolant charging starting step, the coolant charging device (1) is connected with the energy storage unit in the communicating step, the coolant charging device (1) is used for charging coolant to the energy storage unit for a first time period in the coolant charging step, and the first time period is determined based on a preset coolant charging condition. According to the control method, the coolant charging duration is controlled on the basis of the preset coolant charging condition, reasonable coolant charging can be realized according to requirements of different energy storage units, so that unnecessary cooling capacity waste is avoided while the coolant charging requirements are met.

The invention relates to the field of unmanned monitoring car systems, and discloses a wind-powered and solar-powered unmanned monitoring car system for a field environment. The system comprises a monitoring car, a foldable solar photovoltaic panel, and a hydraulic jacking type fan, wherein the monitoring car comprises a control computer, a storage battery, a steering wheel, and a driving wheel; alaser and infrared detection device, a video detector, a panoramic camera, an external environment monitoring sensor and a mechanical gripping arm are arranged on the outer side of a car body of themonitoring car. The system provided by the invention has the advantages that photovoltaic and wind power supply are achieved, and power is directly supplied to control the computer, the infrared detection device, the video detector, the panoramic camera, a steering motor, a direct current motor, the mechanical gripping arm, electro-hydraulic presses and the storage battery, so that self-powering of the unmanned monitoring car in uninhabited field areas is achieved, exploration and mining of unknown environments in the uninhabited areas can be carried out, and the problems of high risks and dangers brought by environment monitoring and information exploration and mining in the areas are solved.

The invention relates to a method for extracting V2O5 and carbon from a low-carbon stone coal mine, and belongs to the field of beneficiation and metallurgy united technology. According to the method, the low-carbon stone coal mine with the grade of V2O5 larger than or equal to 0.65% and the mass percentage of carbon smaller than or equal to 18% is taken as the raw material, flotation enrichment is performed on carbon and vanadium respectively, industrial fuel with the combustion value of 2,400-3,100 cal / g as well as a vanadium-rich solution is obtained through leaching, and V2O5 is obtained by subjecting the vanadium-rich solution to purification, dissolving, vanadium precipitation and calcination. According to the technology, a pollution-free smelting process is performed through flotation enrichment of carbon and vanadium in stone coal, the smelting treatment quantity is reduced, carbon resources in the stone coal are used sufficiently, the production cost and investment cost are reduced, the total V2O5 recovery rate can reach 78%-82%, the utilization rate of carbon can reach 70%-85%, the low-carbon stone coal mine with low V2O5 grade can be treated, and the method has the advantages of low production cost, environment friendliness and the like and facilitates industrial application.

The invention discloses a method for preparing high-quality superfine and light calcium carbonate by taking gypsum as a raw material, belonging to the technical field of calcium carbonate production. The method for preparing high-quality superfine and light calcium carbonate by taking gypsum as a raw material comprises the following steps: (1) by taking gypsum as a raw material, adding a proper amount of water into the gypsum to blend into slurry in which the solid content of calcium sulfate is 40 to 60%; (2) adding the calcium sulfate slurry in step (1) with sodium carbonate of which the mass is 0.8 to 1.2 times the mass of calcium sulfate, and a surfactant of which the mass is 1 to 3% of the mass of calcium sulfate, stirring at room temperature for reaction for 2 to 4h to obtain sodium sulfate and calcium carbonate mixed slurry; (3) filtering the slurry obtained in step (2), and storing the filtrate and precipitate separately. The invention aims to provide the method for preparing high-quality superfine and light calcium carbonate by taking gypsum as a raw material, the production method has the advantages of simple operation, energy conservation and environmental protection, and high-quality superfine and light calcium carbonate can be produced.

The invention relates to a cooling system and a wind generating set. The cooling system comprises a first cooling loop, a second cooling loop, a third cooling loop, a first heat exchanger and a second heat exchanger, the first cooling loop comprises a first fluid pipeline and a first pump set, the second cooling loop comprises a second fluid pipeline and a second pump set, and the second fluid pipeline comprises a main path and a bypass; and the third cooling loop comprises a third fluid pipeline and a third pump set. The third fluid pipeline is communicated with the first heat exchanger and the second heat exchanger at the same time. The first heat exchanger is configured to enable a first cooling medium, a second cooling medium and a third cooling medium to be thermally coupled in a mutual isolation manner; and the second heat exchanger is configured to thermally couple the second cooling medium and the third cooling medium in a mutual isolation manner via the bypass. Reasonable distribution of cooling capacity and reasonable application of waste heat are achieved through mutual-isolation thermal coupling between the cooling loops, so that balanced utilization of cold and heat is achieved, and power consumption of the system is reduced.

The invention relates to an energy-saving pediatric nursing cleaning device which comprises a workbench and further comprises a mounting box fixed to the workbench and having openings formed in the two sides, five mounting grooves formed in the bottom wall of the mounting box, and five partition plates vertically arranged in the corresponding mounting grooves in a penetrating mode in a sliding mode, and the five partition plates divide the interior of the mounting box into a bottle placing chamber, a washing chamber, a flushing chamber, a steam chamber, a disinfection chamber and a bottle taking chamber in sequence; a washing mechanism, a flushing mechanism, a steam mechanism and a disinfection mechanism are arranged in the mounting box; a supporting plate is slidably connected to the top wall of the mounting box, and a plurality of spring clamping jaws are arranged at the lower end of the supporting plate. Feeding bottles are conveyed through the supporting plate and the spring clamping jaw, then the washing mechanism cleans the feeding bottles, the flushing mechanism flushes the feeding bottles, the steam mechanism conducts thermal steaming on the feeding bottles, and the disinfection mechanism disinfects the feeding bottles, so that automatic cleaning and disinfection of the feeding bottles are achieved, and then the workload of nursing staff is reduced.

The invention discloses an intelligent sensing inspection system and method for a transformer substation, and relates to the technical field of electric power system inspection. The system comprises an edge end data acquisition and analysis subsystem, a station end management subsystem and a cloud artificial intelligence subsystem, the edge end data acquisition and analysis subsystem is used for acquiring target inspection data based on an inspection task and performing edge analysis on the target inspection data based on an artificial intelligence model to obtain an inspection analysis result; the station end management subsystem is used for generating and issuing an inspection task, managing inspection related data and generating an original sample set for training and optimizing an artificial intelligence model; and the cloud artificial intelligence subsystem is used for training and optimizing an artificial intelligence model according to the original sample set and issuing the artificial intelligence model. By multiplexing existing equipment of the transformer substation and deploying intelligent equipment, intelligent and automatic inspection of the transformer substation is realized, the manual operation and maintenance cost is saved, and high-quality operation and maintenance are realized.

The invention discloses an energy-saving heating system for a greenhouse and relates to the technical field of heating for greenhouses. The system comprises the greenhouse, a solar panel and a fan, and a floor heating pipe is laid at the bottoms of planting areas of the greenhouse; a cooling fin is installed between every two adjacent planting areas; the heating pipe and the cooling fins are communicated with a water collection device and a water division device; the solar panel, the fan and a controller are connected, and a solid heat storage electric boiler, a water heat storage electric boiler and an air source heat pump are connected to an inverter; the solid heat storage electric boiler, the water heat storage electric boiler and the air source heat pump are communicated with the water collection device and the water division device. According to the system, through power supply of the solar panel and the fan and combination of solid heat storage, water heat storage and the air source heat pump, heating is conducted for the greenhouse at low temperature, heat supply is achieved through floor heating and the cooling fins, the temperate of air in soil and the greenhouse is evenly increased, the temperature range of hot water can be adjusted, energy is saved, and low-energy-consumption and low-cost planting is achieved.

The invention discloses a brake warning lamp of a self-power generation bicycle. The lamp comprises a shell body and a bicycle power generation device, wherein a storage battery, an acceleration sensor and an MCU control module are disposed in the inner cavity of the shell body; a warning lamp is disposed on one side face of the shell body; the bicycle power generation device is disposed on the bicycle, contacted with a bicycle wheel and electrically connected to the storage battery; the acceleration sensor is electrically connected to the MCU control module; the MCU control module is electrically connected to the warning lamp; and the storage battery powers the acceleration sensor, the MCU control module and the warning lamp respectively. The brake warning lamp disclosed by the invention is characterized in that the wheel drives the bicycle power generation device to generate electricity; electric energy is stored in the storage battery; and when the bicycle is slowed down or braked, the acceleration sensor can sense variation of a motion state in time and feed back a signal to the MCU control module, and the MCU control module makes a response immediately and turns the warning lamp on, so that rear bicycles can be warned.

The invention discloses an irrigation system for cotton in an arid desert region and relates to the field of cotton planting and irrigation. The irrigation system comprises a drip irrigation zone, a photovoltaic panel and a draught fan, wherein mulching films are arrayed in the drip irrigation zone in an array; the drip irrigation zone is internally provided with a water capillary pipe and a water-soluble fertilizer capillary pipe; a side face of the water capillary pipe is provided with water drop pipes corresponding to the mulching films; the photovoltaic panel and the draught fan supply electric power to a first water pump, a second water pump, a water-soluble fertilizer preparation barrel, a rainwater collection device and an underground water collection device. According to the irrigation system disclosed by the invention, the electric energy is provided through utilizing photovoltaic power, wind power and valley power, and the electric energy is directly supplied to the underground water collection device, the rainwater collection device, the water pumps and the water-soluble fertilizer preparation barrel; the mulching films, the water capillary pipe, the water-soluble fertilizer capillary pipe, a water supply main pipeline and a water-soluble fertilizer supply main pipeline are paved in the drip irrigation zone of a cotton planting region, so that the problems in an existing cotton planting process that the moisture evaporation amount of ground surface soil is great, the supply of moisture and nutrients is not enough, agricultural water is not scientific, agricultural power utilization resources are lacked and the planting cost is high are solved.

The invention relates to a method for extracting V2O5 and carbon from a low-carbon stone coal mine, and belongs to the field of beneficiation and metallurgy united technology. According to the method, the low-carbon stone coal mine with the grade of V2O5 larger than or equal to 0.65% and the mass percentage of carbon smaller than or equal to 18% is taken as the raw material, flotation enrichment is performed on carbon and vanadium respectively, industrial fuel with the combustion value of 2,400-3,100 cal / g as well as a vanadium-rich solution is obtained through leaching, and V2O5 is obtained by subjecting the vanadium-rich solution to purification, dissolving, vanadium precipitation and calcination. According to the technology, a pollution-free smelting process is performed through flotation enrichment of carbon and vanadium in stone coal, the smelting treatment quantity is reduced, carbon resources in the stone coal are used sufficiently, the production cost and investment cost are reduced, the total V2O5 recovery rate can reach 78%-82%, the utilization rate of carbon can reach 70%-85%, the low-carbon stone coal mine with low V2O5 grade can be treated, and the method has the advantages of low production cost, environment friendliness and the like and facilitates industrial application.

The invention relates to the technical field of safety guarantee, in particular to a personal safety warning method, system and platform and a storage medium. The method comprises the following steps:acquiring alarm data; analyzing and converting the alarm data; and generating personal safety alarm real-time information. Various suspected alarm information can be mastered in real time, analyzed and converted; real-time understanding and mastering of essential data of the alarm situation are realized; according to the method and the system, false alarm reporting and missing alarm reporting ormissing alarm detecting are avoided, so that the severity of the alarm condition can be acquired at the first time according to the essential data of the alarm condition, namely, the police service center can perform targeted police service in real time according to the severity of the alarm condition, blind police service is avoided, time and labor are saved, and reasonable application of policeservice resources is realized.

The invention discloses a LoRa-based intelligent cold chain vehicle system and a measurement and control method. The system comprises a measurement and control subsystem, a measurement and control main system and a remote monitoring system. The measurement and control subsystem comprises five terminal nodes, and the measurement and control main system comprises a LoRa radio frequency board, a core control board and a touch display screen. The remote monitoring system is used for displaying temperature and humidity, position information, opening and closing states, sound and light alarm information and video information in the container and outside the cold chain vehicle detected by the five terminal nodes on a mobile terminal or a PC terminal, and the information is also displayed on a touch display screen. According to the invention, the data is captured from the sensor and the state of the data is displayed on the webpage, so that a worker in a cab can observe the temperature and humidity of the cold chain vehicle, the door state and the real-time picture condition around the container door in real time. Reasonable application of resources and intelligent control of refrigeration are achieved, intelligence of the cold chain vehicle is achieved, and a system which is long in distance, long in battery life and large in capacity can be achieved.

The invention discloses an inspection device with a safety protecting function for telecom tower high altitude. The inspection device comprises a base; a group of hydraulic pushing rods are mounted onthe left side and the right side in the base through fixed seats; the central position of the bottom end of the base is fixedly connected with a mounting block through a hydraulic cylinder; plugs arearranged at the bottom end of the mounting block at equal distance; the top ends of the hydraulic pushing rods are movably connected with an inspection table; first protective nets are arranged at the left side, the right side and the rear end of the inspection table; the top end of the inspection table is fixedly connected with a sunshade board; a group of supporting rods are movably connected with the left side and the right side in the inspection table through electric telescopic rods; a group of fixing clamps are mounted at the front ends of the supporting rods; and a second protective net is fixedly connected between the inner sides of the supporting rods. Through the arrangement of the structures of the plugs, the fixing clamps, the sunshade board, the first protective nets and thesecond protective net, the inspection device with the safety protecting function for the telecom tower high altitude has the advantages of safety protection, space conservation, convenience in inspection and stable structure.

A control method for supplying cold energy to an energy storage unit (2) by means of a cold energy supplying device (1), the control method comprising the following steps: in a cold energy supplying starting step, starting the cold energy supplying device (1); in a connection step, connecting the cold energy supplying device (1) to the energy storage unit; and in a cold energy supplying step, supplying cold energy to the energy storage unit by means of the cold energy supplying device (1) for a first time period, the first time period being determined on the basis of a preset cold energy supplying condition. Said control method controls the refrigerant charging duration on the basis of the preset refrigerant charging condition, such that reasonable refrigerant charging can be realized according to requirements of different energy storage units.

The invention discloses a scheduling method based on data calculation and analysis, and the method comprises the following steps: S1, collecting the states and load information of different resourcesin a resource pool, and storing the states and load information in a database; s2, integrating the states and the load information of different resources in the database, and performing resource cooperative scheduling on the data by the states and the load information of different resources according to a preset scheduling strategy and scheduling priority; and S3, enabling the big data computing platform to dynamically allocate and analyze the resources according to a resource cooperative scheduling result, and output data indexes. The big data analysis process is subjected to dynamic scheduling processing according to the preset scheduling strategy and priority, resource consumption is reduced, cluster configuration is reduced under the condition that service requirements are kept, reasonable application and efficient data analysis of server resources are achieved, and the method has positive significance in enterprise compression cost.

The invention discloses a rapid detection method for coal gangue aggregate weathering in a service state and application of the rapid detection method. Comprising the following steps that coal gangue aggregate is wrapped with cement paste and cured for 14-28 days, and the service state of the coal gangue aggregate in concrete or a semi-rigid base material is simulated; or wrapping the coal gangue aggregate with an asphalt binder to simulate the service state of the coal gangue aggregate in the asphalt mixture; then placing in water at the temperature of 20-90 DEG C for 7-28 days, accelerating weathering, and detecting a crushing value; and comparing and analyzing with the requirement on the crushing value of the aggregate in the related standard, and judging the actual application scene of the coal gangue aggregate. According to the method, a basis is provided for judging whether the coal gangue is suitable for concrete, a pavement base layer or an asphalt pavement mixture or not, performance reduction caused by weathering of the coal gangue aggregate in the service process is effectively avoided, reasonable application of the coal gangue is achieved, and the discharging and stockpiling pressure of the coal gangue is relieved.

The invention relates to a compressor heating device control method in the operational stage of a compressor. The method includes the steps that S1, a reference database of compressor electric power relative to the outdoor unit environment temperature and compressor operating frequency is established in advance; S2, the real-time values of the outdoor unit environment temperature, compressor winding phase currents and busbar voltages are obtained, and the actual electric power and operating frequency of the compressor are further calculated; and S3, a corresponding compressor electric power consumption reference value is searched for in the reference database according to the outdoor unit environment temperature and the compressor operating frequency, and the compressor electric power reference value is compared with an actual electric power value; and when the deviation value between the actual electric power value and the electric power reference value is greater than a power deviation threshold value, a heating device is started and the electric power of the heating device is adjusted in accordance with the deviation value. According to the compressor heating device control method in the invention, the refrigerant state inside the compressor is judged through real-time power, misjudgment can be effectively avoided, and electric losses are reduced. The invention further provides a computer readable storage medium and air-conditioner for realizing the method.

The invention discloses an inspection device with a safety protecting function for telecom tower high altitude. The inspection device comprises a base; a group of hydraulic pushing rods are mounted onthe left side and the right side in the base through fixed seats; the central position of the bottom end of the base is fixedly connected with a mounting block through a hydraulic cylinder; plugs arearranged at the bottom end of the mounting block at equal distance; the top ends of the hydraulic pushing rods are movably connected with an inspection table; first protective nets are arranged at the left side, the right side and the rear end of the inspection table; the top end of the inspection table is fixedly connected with a sunshade board; a group of supporting rods are movably connected with the left side and the right side in the inspection table through electric telescopic rods; a group of fixing clamps are mounted at the front ends of the supporting rods; and a second protective net is fixedly connected between the inner sides of the supporting rods. Through the arrangement of the structures of the plugs, the fixing clamps, the sunshade board, the first protective nets and thesecond protective net, the inspection device with the safety protecting function for the telecom tower high altitude has the advantages of safety protection, space conservation, convenience in inspection and stable structure.

The invention discloses a high-rockfill-dam transient-rheological-parameter inversion method based on the response surface method.The method includes the steps that a rockfill-dam three-dimensional finite element model is built in combination with dam body material sections and construction grading conditions, the sensitivity of the transient parameters and the rheological parameters of rockfill of the material sections is analyzed, and the transient parameters with the high sensitivity and the rheological parameters with the high sensitivity are selected as to-be-inversed parameters jointly; a material static force model is a Duncan EB model, and a rheological model is a Nanjing-Hydraulic-Research-Institute five-parameter model; the implicit relationship between the finite-element-calculated settling volume and the calculation parameters is represented through a specific-form response surface function, undetermined coefficients of a response surface equation set are solved through several times of finite element calculation, and therefore the nonlinear mapping relationship between the settling volume and the calculation parameters is built.On the bases of the response surface equation, the objective function aims at obtaining the minimum root-mean-square error between the calculated settling volume and the practically-measured settling volume, the transient parameters and the rheological parameters are inversed with the genetic algorithm at the same time, and the obtained set of optimal calculation parameters are the inversion result.

The invention discloses a locomotive double-end wireless synchronous control communication equipment data channel redundancy control method, which can select three communication modes or combinations of an LTE-R, a GSM-R or a data transfer radio according to the actual application environment of a combined train, and realizes reasonable application of network channel resources on the premise of ensuring the service reliability requirement. And meanwhile, a data transmission channel can be rebuilt in time through the data transfer radio under the condition that network data is interrupted, the data transmission channel is provided for the head master control locomotive and the middle slave control locomotive of the combined train, and synchronous traction and synchronous braking of the whole combined train are achieved.

The application provides a communication method and device. The communication method can comprise the following steps: detecting a user operation performed by a home terminal user for a public call request; determining a current public number used to respond to the user operation when the home terminal user has a plurality of corresponding public numbers, wherein the public numbers are pre-configured to be bound to the group of the home terminal user; and sending a request message for the opposite terminal user to a server, so that the server executes the call operation based on the current public number through the communication network to the communication numbers of the home terminal user and the opposite terminal user respectively. Through the technical scheme provided by application,the appropriate public number can be selected from the plurality of public numbers corresponding to the home terminal user, so as to realize the reasonable application of the public number resources.