基于经济联系测度下的空间相互作用模型改进

Improvement of Spatial Interaction Model Based on Regional Economic Changes

基于区域经济关系视角下,引用引力模型思想和ArcGIS空间分析能力,借助SPSS统计分析和GEODA软件,针对传统模型的局限性进行相关参数改进,并分析空间相互作用对区域经济的影响。研究包括以下几点:(1)将城市综合竞争力作为目标层,从经济实力和经济结构两方面出发,通过共线性检验,最终选取19个指标作为城市质量的指标体系;(2)通过利用经济联系强度模型引入引力系数参数;(3)测算江苏省地级市间的空间相互作用力,计算地级市的综合辐射量。实验表明:模型的选择和参数的估计是决定模型好坏的关键因素;引力系数量化了城市间交通系统可达度,同时更准确地反映了区域间相互作用力的大小;不同经济发展水平较高的区域集中在省内核心城市,辐射网络呈现双核状态,空间相互作用力的增大加重了两极分化,并且对区域经济的影响是双向的,过大的不适应经济发展的空间相互作用反而会抑制经济的发展。

Based on the regional economic relations, this paper introduces the gravity model and the spatial analysis capability of ArcGIS. With the help of SPSS statistical analysis software and GEODA spatial analysis software, the relevant parameters are improved for the limitation of traditional model, and the infuence of spatial interaction on regional economic mechanism. The research contents include the following points： 1） Taking the city comprehensive competitiveness as the target layer, from the perspective of economic strength and economic structure, 19 indicators are fnally selected as the index system of urban quality according to the collinearity test. 2） The economic contact strength coefcient is used as the gravitational parameter. 3） The radiation intensity of prefecture-level city in Jiangsu Province is calculated and the comprehensive radiation of prefecture-level cities is measured. The experiment shows that the selection of the model and the estimation of the parameters are the key factors to determine the model. The gravitational coefcient quantifes the accessibility of the inter-city trafc system, and more accurately refects the inter-regional interaction forces. The regions with higher economic development levels are concentrated in the core cities of the province, the radiation network presents a dual-core state. The spatial interaction has increased the polarization, and the impact on the regional economy is two-way. The spatial interaction will inhibit the economic development of space interaction .