Inter-Provincial Accessibility and Economic Linkage Spatial Pattern in Northeast China
以东北地区40个城市为对象，用加权平均旅行时间测算省际可达性和经济联系强度，发现哈大经济带可达性高、经济联系沿该带形成主轴，而内蒙古东部与东北三省联系弱。
Taking the Northeast China as a study case, this article used the weighted mean travel times as indicators by the travel time cost gravity model to calculate the inter-provincial accessibility and economic linkage intensity among the40 cities. Then, the economic linkage subordination degree was employed to identify the inter- provincial economic linkage direction of the cities. Conclusions are drawn as follows: ①The high values of inter-provincial accessibility are centralized in the Harbin- Dalian economic belt, adjacent region between Eastern Inner Mongolia and Jilin Province,while the low value clusters in the surrounding regions; ②The disparity of inter- provincial economic linkage intensity among cities in Northeast China is remarkable, and inter- provincial economic linkage intensity is highly related to the inter-provincial accessibility, the urban economic linkages conform to the law of distance attenuation; ③Transportation and near- field directivity of inter- provincial economic linkage direction is prominent, the predominant axes of interprovincial economic linkage have formed along the Harbin- Dalian economic belt, and the economic linkage between Eastern Inner Mongolia and three provinces of Northeast China is weak, the same as surrounding regions and other regions. Finally, the driving force of economic linkage spatial pattern in Northeast China can be divided into four parts:regional strategic policy, transportation infrastructure, industrial division cooperation, physical geography condition.