Evolution and spatial correlation characteristics of inter-provincial rail freight transport network in China from 1990 to 2019
Against the backdrop of new development,the domestic circulation plays a critical role in boosting social and economic development.Based on inter-provincial rail freight data,this paper explores the evolution characteristics of the inter-provincial rail freight network structure on three fronts:node characteristics,spatial association and proximity.The results show that:(1)Network node centrality obeys a power-law distribution with obvious clustering characteristics.There are obvious spatial differences in outdegree and indegree,showing the pattern of sending goods from the central and western regions to the eastern region.The areas with both high indegree and outdegree are located in North and Northeast China.Low outdegree and indegree provinces are concentrated to the southwest of the Fujian-Xinjiang Axis Belt,while high outdegree and low indegree provinces are mainly in Inner Mongolia,Shanxi and Shaanxi.Low outdegree and high indegree provinces present a pattern of scattered distribution.(2)The spatial association has obvious clustering and spatial directionality,with a significant'Matthew effect'.East-Central-West geographical heterogeneity and gradient nudging characteristics are significant,and path dependence and path locking coexist.The organization models of inter-provincial freight network are characterized by core-periphery and pole-axis.However,the spatial structure feature is not obvious and it does not present a rhombic distribution.(3)The roles of sectors are reasonable and stable,with good reciprocity in inter-provincial freight trade.The bidirectional spillover sector is concentrated in Northeast and North China,net beneficiary sector is mainly in Southwest China,broke sector has shifted from the Yangtze River Delta to the Fujian-Xinjiang Axis Belt,and there are few net spillover sector provinces scattered.Regional proximity,geographic distance,social distance and cultural distance have significant effects on inter-provincial trade,but economic distance does not have.(4)The impact of social and cultural distance on inter-provincial freight transportation is decreasing,while the degree of impact of spatial proximity and industrial distance is increasing.
inter-provincial rail freight transport networknetwork structurespatio-temporal evolutionary characteristicsorganization modelsproximityChina
万方数据
