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Accurate spatial-temporal traffic flow forecasting is essential for helping traffic managers to take control measures and drivers to choose the optimal travel routes. Recently, graph convolutional networks (GCNs) have been widely used in traffic flow prediction owing to their powerful ability to capture spatial-temporal dependencies. The design of the spatial-temporal graph adjacency matrix is a key to the success of GCNs, and it is still an open question. This paper proposes reconstructing the binary adjacency matrix via tensor decomposition, and a traffic flow forecasting method is proposed. First, we reformulate the spatial-temporal fusion graph adjacency matrix into a three-way adjacency tensor. Then, we reconstructed the adjacency tensor via Tucker decomposition, wherein more informative and global spatial-temporal dependencies are encoded. Finally, a Spatial-temporal Synchronous Graph Convolutional module for localized spatial-temporal correlations learning and a Dilated Convolution module for global correlations learning are assembled to aggregate and learn the comprehensive spatial-temporal dependencies of the road network. Experimental results on four open-access datasets demonstrate that the proposed model outperforms state-of-the-art approaches in terms of the prediction performance and computational cost., 11 pages, 8 figures

To realize the aim of rapid design, data management, and process management of process route for those small and medium-sized contractors which produce for group enterprises cheaply, a kind of information system architecture based on process route driven is proposed in this paper. On the basis of workflow technology, the information management system which includes the visual process route modeling tool, BOM (Bill Of Material)management of jig & fixture on the production line(process route), the production management of process route, the function of part quality, workload checking and calculating is developed. Finally, the running flow and key implemented technology of the whole system are introduced.

Railway coach system has been developed from simple and single to integrated and intelligent electric devices. Now, as PLC system has failed to meet the requirement of rapid development of coach system because of its resource constraints, in order to overcome limitation of the current system, improve the integral performance and central control, realize uniform control and information platform, the system architecture of railway coach electric safety monitoring system is put forward in the paper, and relevant hardware and software system is designed. The system has been applied to the Chinese 25T train, and also can operate in other public transport such as metro subway, light rail, and MARC train.

As using IT systems that can efficiently plan trains, manage operations and provide passengers with information, the art of state of onboard digital multimedia system is introduced. The structure and main functions of onboard digital multimedia System for subway are described. The Media Controller, audio communications, video display, content management, CCTV Surveillance and communications interface are designed in this paper. The video decoder steps and Software hierarch of Media Player are introduced. The proven complete onboard digital multimedia solutions have been successfully implemented in some city subway.The onboard digital multimedia solutions can also operate in a variety of public mass transit transportation modes.

The totally secure goal of building the Passenger information system of subway is proposed; the security management principle of the subway PIS is analyzed; the safe system structure of the subway PIS is studied. Finally, the safe solutions of the subway PIS is proposed. The method that constructs efficient network security protection system in the PIS designing process is proposed, which thus can ensure the security operation of the whole system and network.

The art of state of onboard metro passenger information system is introduced. The structure and main functions of onboard metro passenger information system are described. The main controlling and remote connected, audio communications, video display, content management, CCTV surveillance subsystem and communications interface are designed in this paper. The onboard metro passenger information system can also operate in a variety of public mass transit transportation modes.