基于时间距离的鄱阳湖生态经济区经济联系变化网络分析研究

Network Analysis of Economic Contacts Variability in Poyang Lake Ecological Economic Zone based on Travel Time Cost

利用GIS软件空间分析方法获取市县间公路交通的时间距离,对引力模型进行修正并测算鄱阳湖生态经济区市县间2000年、2005年和2010年的经济联系,然后采用社会网络方法,分析市县经济联系变化的影响因素。结果表明:市县间经济联系差异显著并呈现出以鄱阳湖为中心的"环形"路网骨架分布;空间经济联系的网络结构渐趋复杂,但经济联系强度还不强,区域还具有较大发展空间;由中间中心度分析可知市县间经济联系正渐趋均衡。进一步分析可知要素的集聚与扩散、市场经济的引导、交通可达性的改善、开发区建设共同构成鄱阳湖生态经济区空间经济联系不断变化的影响因子。

Abstract： 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 20-10 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.