中文摘要：

基于长江经济带内126个地级市间的铁路及公路客运班次数据,运用UCINET及ArcGis软件从网络密度、城市地位及网络层级三个方面对长江经济带的城市网络结构进行了分析。结果显示：长江经济带的铁路客运网络下的省域间密度呈现出距离衰减性特征,公路客运网络形成了东中部、西部两大板块相关联的格局;度数中心度高值集聚区分别显示出轴带指向性及城市群的空间组织结构特征,铁路中介中心度的高值集聚区分布相对均衡;多层级网络分别显示出城市群核心关联格局及其组织结构拓展、客运真空地带等细节。在“海陆统筹、双向开放”的格局下,应加大西部地区交通建设投资,确立西部纵向关联轴带,加强省际边缘山区的交通网络建设,提升贫困山区中心城市的对外联系水平。

英文摘要：

Based on the network data, the number of railway and highway passenger trains between 126 cities in the Yangtze Economic Belt was extracted. Supported by UCINET and ArcGis software, the network structure was analyzed from three aspects： network density, the status of individual city and network levels. The results show that ： the inter - provincial den- sity appears distance attenuation in railway passenger transport network ; The density between provinces in road passenger trans- port network was the eastern - central and western plate - related pattern; The high - value area of the degree centrality shows the axle orientation and the spatial structure of the urban agglomera- tion, and the distribution of the high - value area of the railway between centrality is relatively balanced ; Multi - level network i- dentifies respectively the core structure of the urban agglomera- tion and its organizational structure to expand, passenger vacuum zone and other details of the characteristics. Accordingly, it puts forward that it should increase investment in the western region traffic construction, establish the longitudinal axis of the western region and strengthen the inter - provincial border mountain net- work construction, enhance the level of external contact in the central cities of poor mountainous areas in the context of ＂ Land - sea coordination and two - way open＂ pattern.