淮海经济区城市综合实力评价及其空间解析

Evaluation of urban comprehensive strength in Huaihai Economic Zone and its spatial analysis

以淮海经济区内20个地级市区为研究单元,从城市规模、经济增长、社会发展、开放创新和设施保障5个方面,选取20个指标,构建城市综合实力评价指标体系,采用熵值法对淮海经济区各城市的综合实力进行测度.在此基础上,运用引力模型、扩展断裂点模型及隶属度公式对各城市空间影响力进行定量分析.结果显示:淮海经济区城市的综合实力整体表现为苏北强于皖北、鲁南强于豫东的特征,空间上呈东高西低分布趋势;城市影响范围的大小取决于城市自身综合实力,且与其相邻城市的综合实力大小有紧密联系;城市影响方向上具有较强的交通指向性和邻近地域指向性特征.

Taking 20 prefecture level cities in Huaihai Economic Zone as the research units, 20 indicators were se lected ftom five aspects of urban scale, economic growth, social development, open innovation and facility guaran tee, and an evaluation index system for urban comprehensive strength was constructed. Then the overall strengths of cities in the Huaihai Economic Zone were measured with entropy values. On this basis, the spatial influence of each city in the zone was comprehensively analyzed by using the gravity model, extended breaking point model and membership degree. On the whole, the comprehensive strength of city in northern Jiangsu is stronger than that in northern Anhui, and that in southern Shandong is stronger than that in eastern He＇nan. On the spatial structure, the strengths of cities are higher in the eastern part and lower in the western part of the zone. Moreover, the size of city influence depends on city own comprehensive strength, and is closely related to the size of the overall strength of neighboring cities. Particularly, the direction of the city influence has strong traffic directionality and the character istics of the adjacent areas.