69results about How to "Reduce vacancy rate" patented technology

The invention discloses a park alliance management system and method based on a block chain. The system comprises a user layer, a service logic layer and a data storage layer, wherein the user layer comprises a Web browser and a mobile phone client; the service logic layer comprises three modules of user management, park information management and charge management. The method comprises the following steps: when a vehicle enters a park entrance, judging whether a vehicle is registered, and performing registration if the vehicle is unregistered; performing state judgment if the vehicle has beenregistered, and returning the parked information if the vehicle has been parked; and judging a vehicle balance state if the vehicle is not parked; returning insufficient balance information if the balance is insufficient; judging whether available parking spaces are existent in the park if the balance is sufficient, and returning the non-parking space information if the available parking spaces are inexistent; and enabling the vehicle to successfully enter the park if the available parking space is existent; judging the current state of the vehicle when the vehicle enters the exit of the park, enabling the vehicle to successfully leave if the vehicle is parked at the park, and deducting the parking charge; or displaying failed leaving. Through the system disclosed by the invention, the parking space information sharing and the parking charge automatic payment function can be realized, and the system has thee advantages of being safe and reliable.

The invention relates to an information-based taxi calling system, which includes a positioning terminal, a global satellite positioning system, a mobile communication base station, a monitoring system and a mobile customer inquiry terminal; the positioning terminal is arranged in the taxi and communicates with the taxi. The positioning terminal is connected with the global satellite positioning system through satellite signals, and is connected with the monitoring system through the mobile communication base station; the mobile customer inquiry terminal is connected with the monitoring system through the mobile communication base station. The information-based taxi hailing system and the hailing method of the present invention can effectively solve the existing problem of "a car looking for a person, and a person looking for a car", so as to meet the needs of the market.

The invention discloses a recycling system for waste electrical and electronic products. The recycling system is characterized by comprising a control system as well as a crushing system, a separation system, a dust collection system, a waste gas collection system and a draught fan which are controlled by the control system, wherein the crushing system comprises a knocking crusher, the separation system comprises a winnower and a plastic and metal separation device, and the knocking crusher, the winnower and the plastic and metal separation device are connected through conveyer devices sequentially to form a plastic and metal separation production line; the knocking crusher and an air outlet of the winnower are connected with the dust collection system respectively for collecting light materials and dust of the whole recycling system; an air outlet of the dust collecting system is connected with the waste gas collection system; and the draught fan is connected with the waste gas collection system, so that the knocking crusher, the winnower, the dust collection system and the waste gas collection system are in negative pressure states. The system can be applied to crushing and separation treatment of various waste electrical appliances such as a refrigerator, a circuit board and the like respectively.

The invention discloses a double-loop-line intersected belt sorting machine, an intersected belt sorting system and a sorting method thereof. The double-loop-line intersected belt sorting machine comprises at least one annular rail, two sets of intersected belt cars for forming two conveying loop lines circularly rotated on the annular rails side by side, and a power device for driving the two sets of intersected belt cars to move along the annular rails. The double-loop-line intersected belt sorting machine is delicate in design and simple in structure; as two sets of cars are used in one annular rail, the number of the intersected belt cars is increased by using internal space of the loop lines under the precondition of not increasing the floor area to multiply the sorting capacity, theuse efficiency of the sorting machine is improved, and the equipment cost is reduced; and meanwhile, parcels can be transferred between two conveying annular intersected belt cars, so that the idlingrate of the cars can be reduced, meanwhile, the parcel loading flexibility is improved, and the arrangement requirements and the occupied space of a particle loading line are reduced.

The invention discloses a method for establishing customized chartered vehicle travel demand thermodynamic diagrams. The method includes the following steps that statistical data of a starting point and the demands for arriving at passenger stations are matched and counted according to the corresponding relation between start and arrival of passengers, pie charts with the screened corresponding relation are marked based on a start demand thermodynamic diagram to express a travel demand thermodynamic diagram of the starting point, only the corresponding relation needs to be adjusted for the customized chartered vehicle travel demand thermodynamic diagram oriented to stop demands, pie charts with the screened corresponding relation are marked based on a stop point thermodynamic diagram to express a demand thermodynamic diagram of stop points, and the customized chartered vehicle travel demand thermodynamic diagram oriented to start demands and the customized chartered vehicle travel demand thermodynamic diagram oriented to the stop demands are formed through marking based on the start demand thermodynamic diagram and the stop point thermodynamic diagram respectively. According to the method that transport capacity efficiency can be effectively improved according to different start time periods, the tourism chartered vehicle vacancy rate is reduced accordingly, and operating benefits of tourism chartered vehicles are increased.

The invention discloses a parking space sharing system and method based on a block chain. The system comprises an application layer, a server layer, a middleware layer and a data storage layer, wherein the server layer comprises data statistics, data processing and data query modules; the middleware layer comprises member management, Fabric SDK and chain code function modules; and the data storagelayer comprises relation and state databases. The method comprises the following steps: when a user searches for a shared parking space, the system firstly judges whether the user performs registration or not, then judges whether the parking space is being used or not and finally judges a credit point state of the user, and parking space reservation is carried out on the user meeting the condition; when the user arrives at the parking space, an order state of the user is judged, and a parking operation is carried out; and when the user finishes the use of the parking space, use evaluation issubmitted, the credit grades of the user and a parking space releaser are updated, and an order is completed. The system can realize the functions of releasing parking space sharing information and using the shared parking space, and has the advantages of being safe and reliable.

The invention belongs to the technical fields of overall performance analysis of an unmanned underwater vehicle (UUV) and multi-objective solving of an NSGA-II algorithm and particularly relates to an optimization method for lowering the empty rate of the UUV based on the NSGA-II algorithm. According to the method, a multidisciplinary optimization model of the UUV is established, an optimization objective function is clarified, overall design of the UUV is subjected to subsystem disintegration, and model design of the UUV is completed; then, by determining continuous variables and discrete variables contained in multidisciplinary optimization design, an objective function is calculated, and constraint conditions are stipulated; and finally multidisciplinary optimization is performed on the UUV according to multidisciplinary optimization design based on the NSGA-II algorithm to obtain an optimal result of the empty rate of the UUV. According to the method, the NSGA-II algorithm is selected to serve as a search algorithm for system optimization, multi-objective, multi-constraint and multi-variable actual UUV comprehensive performance problems are solved, comprehensive optimization of a typical UUV structure, performance and the empty rate of the UUV is realized, the empty rate of the UUV is lowered, good performance indicators of the UUV in all aspects are guaranteed, and therefore the method has high practicability.

The invention discloses a shared office management system capable of being used by multiple platforms, and the system comprises a management platform, the management platform is connected with a multi-platform entrance, and the management platform is connected with a third-party payment platform. According to the invention, through the Smart system, client information can be managed more quickly,potential clients can be mined, the vacancy rate can be reduced, the use efficiency of a conference room can be improved, and resources dispersed in each system can be centralized in the Smart system,so that more efficient management can be achieved, the management cost of an enterprise can be reduced, and the working efficiency can be improved; The multi-platform entrance can realize multi-platform integration, potential clients are mined, internal and external resources are effectively integrated, the space check-in rate is improved, and management of clients, products, sales, reports and the like is integrated to improve the space business efficiency; The whole platform supports, is simple and convenient, achieves integrated perfect management, and embodies the value of office services.

The invention provides a system and a method for optimizing empty driving order management. A foreground portal is taken by a user as an entrance, relevant management and scheduling work is carried out by an administrator at the background, through butt joint of an enterprise logistics plan interface and an enterprise logistics system, coordination of management and blending use of empty driving logistics transport power can be realized. According to the method, empty driving logistics capability is taken as stock commodity disclosed on the Internet, the intelligent information processing technology is utilized, business content including intervals and time of empty driving logistics is pre-determined in advance through logistics plans, the business content is disclosed in advanced, sale promotion prices are set to attract clients to reserve, a utilization rate of empty driving logistics capability is greatly improved, the empty rate is reduced, and efficiency improvement and cost saving are realized. Through the method, informatization, e-commerce management and scheduling of empty driving logistics transportation power are excellently realized.

The invention discloses a parking lot parking place charging management method comprising the steps that whether the current vehicle has the parking place authority and the shared parking place authority is judged according to the license plate number of the current vehicle when the vehicle enters the parking lot; if the current vehicle has the shared parking place authority, whether the shared parking place is in the idle state is judged; if the shared parking place is in the idle state, the current vehicle is determined as the authorized vehicle; and if the shared parking place is in the occupied state, the current vehicle is determined as the external vehicle. The invention also discloses a parking lot parking place charging management system. The parking places and parking place charging of the parking lot can be flexibly managed and the vacancy rate of the parking places can also be reduced so as to enhance the utilization rate of the parking places of the parking lot.

The invention discloses express storage equipment and a control method thereof, relates to the technical field of express storage, and mainly aims to reduce the vacancy rate of the express storage equipment. The invention has the main technical scheme that the express storage equipment comprises a fixing mechanism and a movement box, wherein the fixing mechanism is provided with a plurality of spacing parts; the movement box is detachably connected to any one spacing part of the fixing mechanism and comprises a box body, a box door, a safe lock element and a verification component, wherein theverification component is used for obtaining verification information, and when the verification information is preset information, the verification component controls the safe lock element to unlock. The equipment is mainly used for storing express objects.

The invention discloses a vehicle and ship freight concealed quotation system and method. The system comprises a server module, a delivery information module, a concealed bid module, a GPS real-time tracking module, an insurance purchasing module, an invoice purchasing module, an evaluation module and a B / S query module. By use of the vehicle and ship freight concealed quotation system and method, enormous freight source information or vehicle and ship information can be easily obtained, freight owners and vehicle and ship owners are in direct contact, intermediate links are reduced, the logistics cost is decreased, malicious competition can be reduced, and market order is maintained.

The invention provides a convertible welding mold. The convertible welding mold comprises a mold body, overturning devices, outer clamping devices and inner clamping devices, wherein the mold body comprises side plates, an upper connecting plate and a lower connecting plate; the side plates are positioned on two sides of the mold body; the side plates are connected with each other by the upper connecting plate and the lower connecting plate; the overturning devices are arranged at two ends of the mold body; the outer clamping devices are arranged on the side plates on two sides of the welding mold; and the inner clamping devices are arranged on the upper connecting plate and the lower connecting plate. A workpiece to be welded is positioned and clamped by the inner clamping devices and the outer clamping devices of the turnover mold body, workpieces with two different crotch sizes can be continuously welded, the welding efficiency and the utilization rate of equipment are improved, the space is saved on overall arrangement of a workshop, the vacancy rate is reduced, and the welding cost is also reduced.

The invention discloses a hotel flexible pricing and client multi-price selection auction system and method, and the system can achieve the hotel flexible pricing and client multi-price selection auction room selection mode through the hotel flexible pricing, client multi-price selection auction and the user tourism travel online customization technology, and assists the management of the earningsof a hotel, thereby breaking through a consumption barrier between consumers and middle- and high-level hotels, guiding the rise of consumption price, reducing the vacancy rate of hotels, and solvinga problem that social resources are low in efficiency and are wasted. The system and method can help the hotel quickly enlarging a consumer market, reduce the operation cost, and improve the earningcapability. Meanwhile, the system and method also can reduce the travel cost of consumers, obtain service products with the high cost performance, obtain the quick check-in service of tourism, and enable the consumers to enjoy the travel and high-quality life.

The invention discloses a cloud mobile phone monitoring system and method. The system comprises a cloud mobile phone pool, a server, a client and a monitoring module. The cloud mobile phone pool is used for storing cloud mobile phones, the cloud mobile phones comprise a first cloud mobile phone and a second cloud mobile phone, the first cloud mobile phone is a rented cloud mobile phone, and the second cloud mobile phone is an idle cloud mobile phone; the monitoring module monitors the running state of the first cloud mobile phone, and when the first cloud mobile phone breaks down, the monitoring module generates fault information of the first mobile phone and sends the fault information to the server; the server is used for calling the second cloud mobile phone from the cloud mobile phonepool and distributing the second cloud mobile phone to the client, and used for restarting the first cloud mobile phone with a fault. According to the invention, the operation state of the rented cloud mobile phone is monitored from multiple aspects, and when any one aspect fails, the system can respond to the cloud mobile phone in time, so that the best experience of a user is guaranteed.

The invention discloses a partition combined cut-and-filling stoping method, which includes the following steps: step 1, arranging a stope: dividing the stope into a front left stope and a rear rightstope along the trend of the ore body, and dividing the stope into three sections in the vertical height direction and dividing each section into three layers: step 2, constructing a transverse drifting prospecting lane to a bottom column to the vertical ore body, performing construction to a measurement inclined shaft from the stope boundary to the position above the bottom column, constructing undercutting level along the ore body trend at the position above the bottom column and near the measurement inclined shaft, then constructing a filling return air shaft inside the stope near to the lower section, and communicating the two sections at the upper part; step 3, constructing a lode outer slipping shaft and a pedestrian drainage well from the transverse drifting prospecting lane, takingthe undercutting level as a free face, then respectively performing primary lamination and secondary lamination stoping inside the two subsection stope layers, then performing stoping layer by layer;erecting the pedestrian drainage well, laying an artificial false bottom and filling an undercutting layer after the stoping is finished. The method has the advantages that the structure is simple, the construction is reasonable, the stoping efficiency is high, and the two adjacent stopes can be combined for combined stoping.

The invention discloses a semi-dismounting-type greenhouse back wall structure comprising a lower half section composite wall body and an upper half section composite wall body. The lower half section composite wall body comprises a heat radiation layer, a heat-accumulating layer and a heat-insulation layer from the inside out; the dismounting-type wall body comprises a back wall column supporting structure, a detachable inner layer jute fiber board and a detachable outer layer jute fiber board which are respectively installed at the inner side and outer side of the back wall column supporting structure; the jute fiber board can be freely installed and dismounted; the installation of the jute fiber board can reduce the indoor heat dissipation to the outside in winter and has the function of heat insulation; the jute fiber board can be dismounted in summer for increasing ventilation area of the greenhouse and therefore the indoor temperature can be effectively reduced. The semi-dismounting-type greenhouse back wall of the invention can be used in Jiangsu areas for overwintering production and over summer production, thereby solving the problem that year-round production cannot be carried out in greenhouses in the south and increasing the soil utilization rate; meanwhile, the cost for the greenhouse back wall structure is low; the construction is convenient and economic benefit is increased.

The invention relates to a typified form of ribbed floors. The typified form of the ribbed floors is characterized by comprising unfolded arm type forms, side forms and corner forms. The unfolded arm type forms are connected with one anther, the side forms are connected with the unfolded arm type forms, and the corner forms are connected with the unfolded arm type forms and the side forms. The typified form of the ribbed floors further comprises extending bars, the unfolded arm type forms are connected with one anther through the extending bars, the side forms are connected with the unfolded arm type forms through the extending bars, and the corner forms are connected with the unfolded arm type forms and the side forms through the extending bars. The typified form of the ribbed floors adopts the unfolded arm type forms, the forms have elasticity, the cases of the unfolded arm type forms are connected with one another, the sides of the ribbed floors are formed through the side forms, and the corners of the ribbed floors are formed through the corner forms. The flange size of the cases of the forms are adjusted through the extending bars, the most economical rib distance is achieved, and the economical advantages of a ribbed floor system technology are performed to the greatest extent.

The present invention provides a parking space sharing method and a system using the same. The method includes the following steps of: installing a parking space lock; uploading parking space positioninformation; forming a recommendation list; selecting a parking space; submitting a garage entering unlocking instruction; forwarding the garage entering unlocking instruction; performing unlocking upon garage entering; performing locking after garage entering; submitting a garage leaving unlocking instruction; verifying the garage leaving instruction; performing unlocking for garage leaving; andperforming locking after garage leaving. With the method and system provided by the invention adopted, convenient and efficient docking services can be provided for both the supply side and demand side of parking space sharing, the efficiency of parking can be improved, and people's travel time can be decreased.

The invention provides a structural plane shear strength size effect sample mold manufacturing method based on a large number decomposition algorithm. The method comprises the following steps: (1) a series of sizes of coiled concrete samples on a structural plane are obtained according to test requirements of rock mass structural plane shear strength size effect research, and a length matrix is formed; (2) the form of a pouring mold is selected according to the length of the sample; (3) simultaneously pouring samples of which the lengths belong to the matrix by adopting a partition plate typemold; (4) pouring a sample of which the length belongs to the matrix by adopting a spliced mold; (5) designing the lengths of small side plates in the spliced side plates to form a length matrix; (6)calculating according to the large number decomposition algorithm; (7) obtaining the total required number of the small side plates and manufacturing the small side plates; and (8) the partition plates are inserted into the inserting grooves and the side plates to be spliced and then the partition plate type mold and the splicing type mold for pouring the series-size structural plane concrete samples are obtained. The utilization rate of the small side plates can be increased through repeated utilization during pouring, the vacancy rate of the mold is reduced and the sample manufacturing efficiency is improved.

The invention discloses a bus real-time regulation and control information system and a scheduling method based on a genetic algorithm. The bus real-time regulation and control information system comprises a network service center, and a mobile client, a vehicle-mounted terminal, a bus control center end and a bus stop board end which are connected with the network service center through a wireless communication part; and the vehicle-mounted terminal comprises a first microprocessor, and an infrared detector, a GPS positioning module, a two-dimensional code scanning device and a first displaywhich are connected with the first microprocessor. The infrared detector is connected with a P1.0 interface of the first microprocessor; the GPS positioning module is connected with a P1.2 interface of the first microprocessor; the two-dimensional code scanning equipment is connected with a P1.1 interface of the first microprocessor; and the first display is connected with a P1.4 interface of thefirst microprocessor. Multi-channel passengers can be integrated, the advanced communication technology is combined, all-around bus information is provided, the bus is dispatched in time, the travel requirements of the passengers are met, and the utilization rate of the bus is increased.

The invention discloses a medical Internet of Things cloud platform method and system based on big data, and a storage medium. The method comprises the following steps: encrypting and transmitting generated service data; acquiring a log in a log management system, and sending the log to a big data analysis system; receiving an effective error log sent by the big data analysis system; generating acorresponding work order according to the effective error log. The system comprises a cloud platform server, a log management system, a big data analysis system and an intelligent terminal collector.A computer program which can be loaded and executed by the processor is stored in the medium, so that powerful support is provided for fine management and long-term operation of medical equipment, anda positive effect is achieved for benefit improvement of an institution.

The invention discloses a new energy charging pile parking scheduling system, which comprises the following steps: counting the number, model and destination information of new energy electric vehicles driven in at the entrance and exit of an expressway, and predicting the site position of a charging station which possibly queues for charging; a ferry power distribution vehicle is arranged at a station position of the charging station where queuing charging may occur or a previous highway charging entrance and exit at the station position, and a part of new energy electric vehicles needing charging are commanded to run to the ferry power distribution vehicle to be charged; the probability of vacant charging stations and queuing charging of the charging stations is reduced, and efficient charging is achieved under the condition that the electric vehicles do not go out of the expressway; meanwhile, the power consumption possibly required by the charging station on the highway can be predicted in advance, and power grid debugging and power transmission configuration can be carried out in advance.

The embodiment of the invention is suitable for the technical field of container scheduling, and provides a container scheduling method and device and a server, and the method comprises the steps: receiving a scheduling request of a to-be-scheduled logistics node, wherein the scheduling request comprises the number of to-be-scheduled containers; aiming at the scheduling request, determining a target logistics node meeting the number requirement of the containers to be scheduled; obtaining a target scheduling path between the target logistics node and the logistics node to be scheduled; and generating a scheduling instruction according to the target logistics node and the target scheduling path, and sending the scheduling instruction to the to-be-scheduled logistics node and the target logistics node to indicate the to-be-scheduled logistics node and / or the target logistics node to perform container scheduling according to the scheduling instruction. By adopting the method, the cooperative operation capability of each logistics node can be improved, and the utilization rate of the container is improved.

The invention related to the technical field of an energy storage system and discloses a fluid heat accumulating system and a usage method thereof. The fluid heat accumulating system includes a plurality of heat accumulating tanks, a gas-liquid separator, a lower temperature pump, a high temperature pump, a heat exchange device of the external heat supplied and a heat exchange device of a thermalload used outside. Initial filling liquid level of the heat accumulating tank is a zero liquid level; a feeding liquor valve of the separator is connected with a plurality of discharging valves of theheat accumulating tanks, a discharging gas valve is connected with a plurality of pressure maintaining valve, an inlet of the lower temperature pump is connected with a lower temperature dischargingliquor valve, an outlet of the lower temperature pump is connected with an inlet of the heat exchange device of the external heat supplied; an inlet of the high temperature pump is connected with a high temperature discharging liquor valve, an outlet of the high temperature pump is connected with an inlet of the heat exchange device of a thermal load used outside; an outlet of the heat exchange device of the external heat supplied and an outlet of the heat exchange device of a thermal load used outside are connected with a plurality of the feeding liquor valves of the heat accumulating tanks.The fluid heat accumulating system has the advantages of high usage rate of the heat accumulating tank and simple and flexible control and the like, the cost of the heat accumulating heat system can be lowered, and the covering area is reduced.

The invention relates to an intelligent logistics storage system and a working method thereof. The intelligent logistics storage system comprises a server, a courier hand-held terminal and multiple express access boxes connected with the server; the server is suitable for allocating the storage position number of the express access boxes for all courier delivery companies and sending storage position information to the courier hand-held terminal. According to the intelligent logistics storage system and the working method thereof, the storage position number can be allocated to the courier delivery companies in advance, couriers can know the working state of the express access boxes conveniently, and by combining billing, the express access boxes can be subjected to charge management conveniently; according to the average daily application amount of storage positions of the courier delivery companies, the storage position number of the next day is dynamically allocated, and thus the number of the storage positions adapts to the delivery quality of the courier delivery companies; the usage rate of the express access boxes is increased, and the vacancy rate of the storage positions is lowered.

The invention discloses a film-coated product cleaning mechanism for optical filter production, relates to the technical field of film-coated cleaning of optical filters, and aims to solve the problems that cleaning liquid is scattered and a working motor operates under load when an existing device is used for cleaning the optical filters by moving a water tank, the optical filters are damaged in the stirring process, and the cleaning liquid is not filtered to cause secondary pollution. The mechanism comprises a workbench, a cleaning tank and a cleaning basket. The cleaning tank is fixedly connected to one side of the workbench, the cleaning basket is installed in the cleaning tank, an oscillation assembly is installed above the workbench and acts on the cleaning basket, a stirring assembly is installed in the cleaning basket, a filtering assembly is installed outside the cleaning tank, a vertical plate is fixed to the top of the workbench through spot welding, and a transverse plate is fixedly connected to one side of the vertical plate. Through mutual cooperation of the oscillation assembly, the stirring assembly, the filtering assembly and the clamping assembly, the energy-saving, efficient and cleaner cleaning effect is achieved.

The invention discloses a single-row sorting machine for rhizome materials. The single-row sorting machine for the rhizome materials comprises a rack, circular chains, a driving shaft, a driven shaft and a plurality of rollers arranged on the rack in parallel, the driving shaft and the driven shaft are arranged at the front end and the rear end of the rack, the circular chains are driven to convey circularly through chain wheels on the driving shaft and the driven shaft, two ends of each roller are fixedly connected with the circular chains positioned on two sides of the roller, at least one single-row conveying passage used for conveying the materials is arranged on a roller conveying surface formed by the rollers, and the width of each single-row conveying passage is a passing width of one single material; a friction guide rail is arranged on the rack and arranged below the rollers along the material conveying direction, and the rollers rotate and roll by 360 degrees along the friction guide rail. By the single-row sorting machine for the rhizome materials, quick material sorting and conveying are realized, too many vacancies of the materials or material accumulation in the testing process is avoided, and productivity unification of sorting, feeding and testing is achieved.

The invention belongs to the technical field of big data, and particularly relates to a railway train operation apartment management system based on big data. The system comprises a data acquisition unit configured to acquire train operation data and apartment operation data in real time; the train operation data comprises train station information in a set time range and time information when a train arrives at each station; the apartment operation data comprises apartment position information, and check-in information and emigration information of the apartment in a set time range; and the apartment planning unit is configured to calculate the vacancy condition of each room in the apartment under each time node in the set time range based on the check-in information and the emigration information of the apartment in the set time range. Through combined calculation of train operation and apartment operation, apartment check-in management is automatically carried out, the intelligent degree of railway train operation apartment management is improved, manpower resources are saved, and meanwhile the utilization rate of the apartment is improved.

The invention relates to a circulating system for a final assembly vehicle. The circulating system comprises two lifting devices for lifting or landing the final assembly vehicle, multilayered tracksfor guiding the final assembly vehicle to move and a rotating device for adjusting orientation of the final assembly vehicle. The vertical separation distance between adjacent two tracks is greater than the height of the final assembly vehicle. The rotating device comprises multiple rotating mechanisms corresponding to the tracks one by one and the rotating mechanisms are used for bearing the final assembly vehicle and driving the final assembly vehicle to rotate, and connecting tracks of the rotating mechanisms can be aligned to the end parts of the tracks, so that the final assembly vehiclecan travel to the tracks from the connecting tracks or travel to the connecting tracks from the tracks. Joining tracks of the two lifting devices can be aligned with the end parts of the tracks, separately, so that the final assembly vehicle can travel from the joining tracks to the tracks or travel from the tracks to the joining tracks. The joining tracks, the connecting tracks and the tracks jointly form a circular traveling circuit of the final assembly vehicle. Therefore, the final assembly vehicle is circularly used, and the stability of the final assembly vehicle in the travelling process is improved.