基于交通系统可达性的城市空间相互作用模型重构方法研究

An Approach on Reconstruction of Intercity Spatial Interaction Model Based on Spatial Traffic System Accessibility

为了对区域城市之间的空间相互作用进行定量化描述与计量,本文提出一种新的基于空间交通系统可达性的引力模型重构方法,将交通距离、运输量、运输能力、最短旅行时间等综合性因素纳入模型参数。城市间的距离不仅考虑了交通线的长度,还顾及两地客货运量的大小;模型系数也不是简单地设为常数,而是包含客运数量和货运能力比重,长途汽车、火车、航班和航运日均班次,以及两地最短旅行时间的变量。通过对山东省城市群进行实证分析,结果证明了该方法的合理性和有效性,能够用于城市(区域)间相互作用力的分析研究。

In order to describe and measure the spatial interaction among cities in a re-gion, a new approach on reconstruction of intercity spatial interactional model based on spatial traffic system accessibility has been put forward in this paper. Comprehensive fac-tors such as traffic distance, transport volume, transport capacity and the shortest travel time etc. have been considered. Traffic distance considers not only the length of traffic lines, but passenger and freight transportation displaces spatial distance here. The coeffi-cient of the model is not be set as constant but a variable which includes the proportion of passenger quantity and freight capacity, average number of long-distance buses, trains, scheduled flights and passenger liners in each day, and the shortest travel time and so on. And an example of reconstruction of intercity gravity model in Shandong Province has been done and the results prove that the most reasonable results have been gained？ by applying the new approach. It is a reasonable and effective method to analysis and research the capability of spatial interaction among cities （regions）.