Network Analysis of Economic Contacts Variability in Poyang Lake Ecological Economic Zone based on Travel Time Cost
利用GIS空间分析修正引力模型距离参数，测量2000、2005、2010年鄱阳湖生态经济区城市间经济联系强度，并通过社会网络分析揭示其空间网络特征与演变趋势。
By the time cost of road data obtained from the spatial analysis methods of GIS,the distance parameter of gravity model is modified and the intensity of economic contacts between every two cities are measured and compared in 2000、2005 and 2010 in Poyang Lake Ecological Economic Zone.And then,use the society network analysis to explain the space economic contacts’network characteristic among cities.The results indicate that: There is significant disparity of the quantity of every city’s economic contacts and remarkable hierarchical character,the economic contacts among cities are formed characterized by a spatial structure that center on transportation network around Poyang Lake;the spatial economic contacts’network structure tends to be complicated,but not strong;By the betweenness centrality analysis spatial economic contacts among cities tends to be balanced gradually.The research suggest that the agglomeration and diffusion of essential factors,the improvement of transport accessibility,the construction of development zone which together formed the reason that actuated space economic contacts changing continuously in Poyang Lake Ecological Economic Zone.