The invention belongs to the technical field of electromechanical device installation and discloses a complex pipeline collision optimization method of subway electromechanical engineering. According to the method, three-dimensional bus interface module (BIM) software is used for establishing different professional virtual BIM models which are consistent with completed engineering and then output to three-dimensional collision software for establishment of a combined three-dimensional collision model for collision analysis, collision nodes are then processed and optimized, and then decorative texture mapping and animation roaming are carried out on the combined, analysed and processed three-dimensional collision model without the collision node problem through 3D - MAX software, and therefore collision optimization of complex pipelines of the subway electromechanical engineering is achieved. According to the complex pipeline collision optimization method of the subway electromechanical engineering, the BIM technology is utilized to solve the problem that collision of various complex pipelines causes construction ceasing during electromechanical installation, reasonable planning and utilization of electromechanical pipeline equipment and the like are achieved by means of the optimized design, construction waste is reduced, construction time is shortened, working efficiency at site is improved greatly, and initial investment of a proprietor is reduced.

Complex pipeline collision optimization method of subway electromechanical engineering

The invention relates to a management method for an engineering progress and cost management system. According to the management method, members are taken as basic composition units to establish a three dimensional engineering model, moreover, an engineering is divided into a plurality of stations according to a flow, relevant information of each member of specific stations is bound to a corresponding member in the three dimensional engineering model, the system can automatically calculate relevant information such as engineering work load, progress and construction cost of the corresponding member at a corresponding station according to set corresponding rules and member specification information, so visualization engineering work load calculation, visualization engineering progress and construction cost management are realized, moreover, progress deviation threshold values and cost deviation threshold values are set, when a deviation value between planned progress and practical progress of a certain station or a deviation value between pre-estimated construction cost and practical construction cost of a certain station are greater than the set threshold values, relevant alarm information is automatically emitted, so automatic alarm is realized when engineering progress lag exceeds a set value or the engineering cost exceeds a set value.

Management method for engineering progress and cost management system

The invention belongs to the field of three-dimensional geographic information system data visualization, and particularly relates to a method for automatically building a three-dimensional model of data of an underground pipeline. The method comprises the steps of building a three-dimensional virtual geographical environment according to DEM data and DOM data, cleaning and organizing the data of the underground pipeline, establishing a pipeline node tree structure relation, building underground pipeline node joints and a pipeline three-dimensional meta model, automatically building the three-dimensional model of the underground pipeline according to the structure of the underground pipeline and the positions of nodes, in a virtual geographical scene, of the underground pipeline, building a massive underground pipeline model drawing mechanism based on the LOD, loading the three-dimensional model of the underground pipeline to the virtual geographical scene, and carrying out visualization and query management. The method for automatically building the three-dimensional model of the data of the underground pipeline has the advantages that modeling and model management are flexible and convenient, the model of the underground pipeline does not need to be built manually, expression and rapid visualization of the data structure of the underground pipeline are facilitated, and rapid building and flexible management of the model of the complex underground pipeline in the virtual geographical environment are achieved.

System and method for automatically building three-dimensional model of data of underground pipeline

The present invention provides a time-space dimension decomposition-based airport gate position allocation method and a system. The method comprises the steps of dividing all flights according to a preset time period and the airport running time of each flight so as to obtain a flight set corresponding to each time period; according to the preset attribute of each gate position, dividing all gate positions to obtain gate position sets corresponding to the attributes of the gate positions; according to flight sets and gate position sets, establishing a constraint condition and an 0-1 integer planning model; based on the branch and bound method, solving out the solution of the 0-1 integer planning model and obtaining a gate position allocation scheme. According to the technical scheme of the invention, the allocation efficiency of airport gate positions is improved and allocation results are optimized. Meanwhile, the efficient and safe operation of an airport is facilitated.

Time-space dimension decomposition-based airport gate position allocation method and system

The embodiment of the invention provides a link switching method under a high-speed motion state, a vehicle-mounted AP and a system Signal strength of a trackside AP is obtained, wherein the signal strength of the trackside AP is monitored by the vehicle-mounted AP according to a preset monitoring rule; whether a main trackside AP which sets up bridging with the vehicle-mounted AP meets the following conditions at the same time or not is judged and the following conditions are that the signal strength of the main trackside AP is less than a preset switching threshold value; the signal strength of the main trackside AP is less than that of a standby trackside AP of the vehicle-mounted AP; the signal strength difference between the main trackside AP and the standby trackside AP is larger than the preset difference threshold value; if the conditions are met, the standby trackside AP is updated to be the main trackside AP, and the vehicle-mounted AP sets up bridging with the updated main trackside AP The problem of data packet dropout caused by frequent link switching in the prior art is solved The link switching method under the high-speed motion state relates to the technical field of network communication

Link switching method under high-speed motion state, vehicle-mounted AP and system

The invention discloses a train communication system and method based on AP (Assess Point) switching The train communication system comprises a central layer, a trackside layer and a vehicle-mounted layer which are in wireless communication in sequence, wherein the central layer comprises a master wireless controller and an auxiliary wireless controller respectively connected with a server through a backbone network, the trackside layer comprises two or more APs linearly distributed beside a track, and the vehicle-mounted layer communicates with the APs through an STA (single thread apartment) As for the rain communication system and method based on AP switching, firstly, the architecture of a CBTC (communication based train control) system is improved firstly, the wireless controller is introduced on the central control layer of a train, the functional configuration of APs is simplified so that other functional configurations of the APs are transferred upwards and the functions are intensively realized in the wireless controllers; and secondly, a communication channel for the APs and the STA is designed, and the STA can work without searching an appropriate communication channel in the detection stage

Train communication system and method based on AP (Assess Point) switching

The invention discloses a system and a method for deleting repeating data. The delete system for deleting the repeating data is of a distributed-type structure, and is mainly composed of a client side, a management server and memory node servers. The client side is mainly used for receiving user requests for saving files/ restoring the files, and segmentation files/ composition files. The management server has the main functions of fingerprint value comparison, fingerprint map database maintenance, erasure code encoding and data compression. The memory node servers are mainly used for storing compressed data blocks. The client side and a management server end are connected through a local area network, and the management server is connected with the memory node server ends through the local area network. A user saves and restores the files through the client side. The erasure code encoding and the data compression are carried out on segmentation blocks, the compressed data blocks are stored in the different memory node servers in a scattered mode, once a part of memory nodes break down, the saved data in the rest memory nodes can be used for carrying out file restoring, the reliability of the system for deleting the repeating data is improved, and waste of a memory space is reduced.

System and method for deleting repeating data

The invention relates to an auxiliary management system for subway integrated pipeline construction. The system comprises a user management module, a three-dimensional management module, a construction management module and a logging module, wherein the user management module comprises user login authentication and logging off function; the three-dimensional management module comprises scene import, three-dimensional roaming, layer management, legend management and navigation functions; the construction management module comprises basic information management, pipeline modification management, spatial analysis, pipeline collision detection, process coordination, construction schedule management functions; and the logging module can record information on user operation on pipelines in real time. The auxiliary management system for subway integrated pipeline construction provided by the invention has the beneficial effect that three-dimensional visualization of construction process management is realized, so that construction schedule is more visual, and the representation of construction management effect is enhanced, and rework in pipeline construction process is effectively avoided; and through spatial analysis and pipeline collision detection means, the problem of spatial collision between professional pipelines can be effectively solved, and the smooth progress of projects is ensured.

{0>Auxiliary management system for subway integrated pipeline construction and implementation method thereof

The invention discloses a statistical learning model based gate position allocation method. The statistical learning model based gate position allocation method comprises the steps of adopting a prior probability prediction model, producing a take-off time difference value probability set, a take-off time difference value probability set and a landing time difference value probability set according to the historical flying situation of a certain flight, predicting arrival time probability distribution and parking apron airside leisure degree of the flight and accordingly performing flight gate position allocation. The statistical learning model based gate position allocation method is based on airside allocation, facilitates adjustment on only close gate positions of flights and shortens walking distances of passengers. In addition, overall evaluation on the using situation of gate positions is facilitated, allocation can be performed according to the planned landing time probability of the flights based on probability allocation, the gate position allocation accuracy is improved, gate position adjustment times caused by flight delay is decreased, and meanwhile the satisfaction degree of the passengers is improved. The utilization rate of the gate positions is comprehensively improved, and reasonable allocation of gate position resources is ensured.

Statistical learning model based gate position allocation method

Disclosed is a method for segmenting and extracting characters in a self-adaptation mode. The method comprises the steps of firstly, conducting inclination correction on a read-in image, then, positioning the coordinate (x0,y0) at the upper left corner of a table from the image, setting a rectangular frame to cut out the image according to the coordinate, and finally segmenting and extracting one single character. According to the method for segmenting and extracting the characters in the self-adaptation mode, various binarization image effects are combined, two kinds of schemes on the basis of the combination of the perpendicular-direction projection and contour features are adopted to conduct several-time segmentation and extraction in the self-adaptation mode, the segmentation rate of a character string positioned from the image is improved, and the accuracy of extracted digits to be recognized is kept between 98% and 100%.

Method for segmenting and extracting characters in self-adaptation mode

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