Research On Evaluation Of Regional Network's Structural Resilience And Its Spatial Optimization

City network's structural resilience is a rising concept in the field of regional resilience,it focus on how structural properties affect the region responding to external shocks and recovering,maintaining or improving the original system characteristics and key functions,which is of great significance to the healthy development of regional space.In recent years,with the "Yangtze River Urban Agglomeration Planning","Yangtze River Economic Development Plan" and so on,the Yangtze River urban agglomeration ushered in the development opportunities.Taking the urban agglomeration in the middle reaches of the Yangtze River as the case,from the area of regional toughness to build economic,information,transportation three types of contact network,using the urban flow and complex network theory,thanks to the ArcGIS and Gephi social network analysis tool,this article try to measure the network's structural resilience and spatial characteristics of urban agglomerations,and the spatial optimization strategy of urban agglomeration is put forward according to the evaluation results.This research consists of three main parts,PART?:the construction of the research ideas,which is mainly the basic content of the introduction and related research progress,including the research background,the goal,the method,the frame,the domestic and foreign research summary and so on.Part?: Theoretical and empirical analysis.Including the urban agglomeration of the network structure resilience evaluation system(Chapter 3),analysis on the results of network structure resilience assessment of the urban agglomeration in the middle reaches of the Yangtze River(Chapter 4),the optimization strategy of network structural resilience space of urban agglomeration in the middle reaches of the Yangtze River(Chapter 5).The above three chapters are the main contents of the paper,the main line of logic is,firstly,forming the evaluation index system(four aspects of the nature of the six indicators)based on the theoretical researches.Secondly,constructing the economic,information and transportation networks of urban agglomerations in the middle reaches of the Yangtze River.Thirdly,assessing the hierarchy,assortativity,transmission and agglomeration of three networks.The results show that the structure of the urban agglomeration in the middle reaches of the Yangtze River has a certain resilience,there are differences between hierarchy and assortativity,not obvious in transmission and clustering.The structural resilience presents the characteristics of the disparity of the overall morphological patterns,the dislocation of the classified central cities,and the diversification of the network connection characteristics.Furthermore,some suggestions are put forward to optimize the spatial structure of urban agglomeration in the aspects of general structure,area structure and element flow.Part?: Research conclusions.On the basis of summarizing the main research conclusions and innovation points,the paper points out the shortcomings and problems of the research and prospects the future research direction.