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SPACIAL INTERACTION AND NETWORK STRUCTURE EVOLVEMENT OF CITIES IN TERM OF CHINA'S RAILWAY CONTAINER FLOW IN 1990S

The pattern of freight flows is an important aspect of spacial interaction between cities.With the development of China's economy and the transition to a consuming society,the transportation of high value-added increased rapidly,and the distribution of the flows in space changed greatly in 1990s.This paper deals with the rail container flows between cities by using a O-D flow matrix between nearly 200 cities.The distribution of flows by distance and the dominant flows are discussed,contrasted with rail passenger flows.It is found that the network structure evolvement of rail container flows is very different with rail passenger flows'.While the latter has a trend of polarizing to hubs,the former shows a tendence of decentralization with different changes in different regions.And the paper tries to explain this phenomena.