滇黔桂省际边界区域城镇经济联系的网络结构特征与演化分析

以滇黔桂省际边界区域28个城镇为例，构建城镇中心性评价指标体系，利用改进的熵值法测度各城镇的中心性得分，评价滇黔桂省际边界区域经济空间结构演变，利用修正的引力模型测度了1995年、2004年、2014年3个年份各城镇之间经济联系强度；借助GIS技术手段分析了城镇经济联系强度的空间格局，评价城镇等级体系演化特征；最后利用社会网络分析方法考察了城镇经济空间联系和网络关系的演化规律，得出如下结论：滇黔桂省际边界区域中心城市逐渐形成，经济重心由南向北转移，由右江区单中心逐步发展到兴义市、右江区、文山市三中心，再到兴义市发展成为强中心，平果县与靖西市具备发展为滇黔桂次中心城镇的潜力；城镇间的经济联系总体较弱，区域整体网络密度低，但呈现出不断增强的趋势，低等级城镇对高等级城镇的引力与高等级城镇对低等级城市的引力不同，形成两种不同的城镇网络体系，经济联系紧密地区主要集中在中心城市之间及中心城市与经济强县之间；三角结构的外围经济联系密度明显较低，对于大多数城镇来说，尚不具备经济辐射能力，辐射效应极弱。

NETWORK STRUCTURE AND EVOLUTION ANALYSIS OF URBAN ECONOMIC CONNECTION IN THE YUNNAN-GUIZHOU-GUANGXI PROVINCIAL BORDER REGION

This paper studies 29 cities and towns in the Yunnan-Guizhou-Guangxi provincial border area. We construct an evaluation index system of urban centrality, and use the improved entropy method to measure the urban centrality score, to evaluate the evolution of the regional economic spatial structure in the YunnanGuizhou-Guangxi provincial border area. The modified gravity model is used to measure the economic connection intensity between cities and towns in 1995, 2004, and 2014. The spatial pattern of urban economic connection intensity, and evolution characteristics of urban hierarchy system are analyzed by means of GIS techniques. Finally, we use social network method to examine the urban economic spatial connection and network evolution. We have the following conclusions:the center cities are in the process of forming in the Yunnan-Guizhou-Guangxi provincial border area; the economic center is shifting from south to north, from Youjiang District as the single center to XingyiCity, Youjiang District and Wenshan City as the new three centers, and to Xingyi City as the strong center with Pingguo County and Jingxi City as the potential sub-centers.