Evolution Mechanism Of Railway Passenger Transportation Network

The recognition of the time-space complexity and the understanding of the evolution mechanism are very important in research on railway passenger transportation networks.By employing the theories and methods of complex networks, the mechanism of railway passenger transportation networks is analyzed, which includes;In research on the complexity of railway passenger transportation networks, by comparison between transportation network and some virtual ones, between different transportation modes, between freight and passenger transportation, the characteristics of railway passenger transportation networks are discovered, including dependence on geographic conditions, close correlation and interoperability among its elements, interaction with social and economic systems.In research on the evolution principles of railway passenger transportation networks, the basic characteristics under the propulsion are that the number of points is increasing gradually, the connection of points and the hierarchies of the network are clear and optimized, following some principles. The basic evolution process includes three steps, which are the growth of points and edges, the hierarchy, and the basic network.In research on the structure of railway passenger demand networks, some factors impose the influence on passenger demand, which includes the local economics, the urbanization, the geography, the operating rules and the construction patterns. Based on the spectral bisection method, the fuzzy clustering agglomerative method and modality fiction, the method to find the communities in demand network is conceived.In research on the evolution mechanism of railway passenger lines network, some factors and their influences are discussed, such as the size, the design of mechanism, the dynamics and the surroundings. The mechanism of the growing, combining, splitting and quit of points and edges, the change rules of weights are designed to construct a model of railway passenger lines network with regulable variables. The steps of the method are described.In research on the local evolution of railway passenger networks, the local world of railway passenger networks is analyzed, that is, the regional economics and its railway system. Three types of urban area with different spatial planning require different kinds of railway planning and growing rules. The correlative evolution model of regional railway passenger network is constructed and with different design ideas to get three kinds of mechanism and methods.The trend in research of this field includes the better design of evolution mechanism, and the theoretical research of the correlation of statistics such as clustering coefficient.