Research On The Evolution Of Complex Networks Of Bohai Sea Port Transportation

Transportation is the basic needs and pre-conditions of social and economic development, expanding the cooperation and personnel exchanges of international economic and trade, has important economic, social and political significance. Transportation network composed by the transport routes, transport sites, transport equipment and related facilities, directly or indirectly affect almost cover the whole country's economic, social, cultural, defense and other important areas on economy and efficiency. So it has great significance to do the research on the transport network to guide the development of transportation network planning, construction, management and operations and other aspects.Previous study on transportation network is concentrated in the graph theory, fractal theory and other methods, mainly around the optimization of spatial organization and economic efficiency of transportation network, the research lack of doing the study on the network from the overall space study. The transportation network is a comprehensive, dynamic, open and complex system requires the use of management science, information technology, control theory, economics and other disciplines to study, can't study the transport network on a single certain aspects. Complex network theory provides an important idea on the study of the complexity of the transportation network, but the research on complexity of the transportation network is still in the not very mature stage. In this paper, use complex network theory to study the Bohai Sea region transportation network to help guide the overall transportation network formation, construction and management.This paper first describes the complex network theory and the basic theory of transport networks, and combined the complex network theory and transport network together to analysis the complexity of sea transportation network; then introduced four typical network topology, and analysis the transportation network under different topologies, draw the conclusion that the sea transport network topology is a multi-hub-spoke network; The third, take the port as the center, analysis the Bohai region transportation network from the qualitative point of view, including rail transportation networks, road transportation network and the network formed by Bohai region sea transport routes; Finally, using modified BA scale-free network evolution model, selecting the hinterland economic output, throughput, and between ports From sea ports of Bohai Sea region major ports as factors to get the attract degrees and the connection probability, get the Bohai Sea the evolution of transport networks by calculating, that the Bohai sea transport network within the region of Dalian, Tianjin and Qinhuangdao as the major hub port.