Study on Urban economic region of Huaihai Economic Region Based on Economic Contacts
利用引力模型和综合交通模型计算淮海经济区城市间的经济联系势能和流量强度，分析经济辐射范围并划分出5个城市经济区，对区域规划有参考价值。
Along with the socio-economic development,the various contacts between cities and regions are becoming more and more close and complicated.By using the gravity model and comprehensive passenger transportation model,we calculated the potential energy of economic contacts and economic flow Intensity between cities in Huaihai Economic Region then analysis the economic radiation and memberships of this region.The result indicate that:the spatial structure of the potential energy of economic contacts appears as radiated with some important node cities such as Xuzhou,Shangqiu,Linyi,HuaiAn.Spatial Heterogeneity Patterns for the Economic flow intensity of Huaihai Economic Region present as the framework just like word kai which contains Jining,Linyi,Fuyang,Bengbu as network node points,with the central city Xuzhou.However,the Connection between Xuzhou and its peripheral cities shown Consistency in two aspects we said above.Finally,we divided Huaihai Economic Region into 5 urban economic region as follows:core urban economic region,Bian-shang urban economic region,Lai-tai urban economic region,Lin-zhao urban economic region and Yan-huai urban economic region.