Research On Evolution Of Spatial Network Structure In Urban Area Of Yinchuan Plain

Network space structure of urban area is the space level structure composed of associative network between different cities. It is the result of traffic network, economic network, and information network stack with each other. The purpose of this paper is to analyse the position which is the urban in the relation network and the relationship between each other in different periods, to judge the space network morphology of the whole town and the law which presented in the evolution process. I hope the result of this study can provide a theoretical decision for the urban's development direction in the future.Based on the urban in the yinchuan plain area as the research object, this paper summarizes the research results of the urban network and regional spatial network in recent years,with defines the urban regional spatial network, information network and the urban complex network. Referencing network cities, flow space and the complex network theory,the paper analyzes the formation, the evolution process and evolution characteristics of network space structure in research area.First of all,this paper takes topological transformation among different traffic map in Yinchuan plain, selecs the accessibility, correlation degree and the centricity index to analysis evolution process, rules and influence factors of the traffic network.It is to get a different period of yinchuan plain space structure characteristics of the present. Secondly, through the construction of economic relation model,the paper divides the urban classes of different times, determines the relationship between direction of each town, in order to analysis the flow of economic fluctuation space process, discusses the economic center and yinchuan gateway city of overlap effect. Again,the paper analysis the process of the information network to promote urban area from level structure to the network structure evolution theoretically, through the establishment of regional informatization spatial difference evaluation system, the paper measures the informatization level of urbans of different periods using the analytic hierarchy process. It analyses the classification of information space difference, and discusses the information space of the differences between urban development trend. Finally, based on the calculation of complex network coordination degree, the paper gets the result of space structure of the complex network in the yinchuan plain in different period and discusses the optimization strategy.The results show that, the spatial structure of Yinchuan plain has a change from the single center mode of center to multiple centers network mode. In the process of the development, Yinchuan has been a core city. In network structure, only a few towns node has a large number of network connections; towns node is biased in favor of the nearest connection:the network connection between town gradually complicated; the core position of Wuzhong will be highlighted.