基于网络测度的宝鸡至汉中铁路功能定位研究

针对铁路规划项目功能定位定性分析为主的客观性不足问题,以宝鸡至汉中铁路为研究对象,选取节点间旅客交流时间或节点间运输距离为权重,运用Space L构造法建立区域铁路客、货运输网络拓扑结构模型;采用复杂网络分析方法,基于"有无对比"思想及等级化线路技术标准,结合应用Pajek软件与R软件,测算区域铁路运输网络直径、平均距离、边介数、网络效率等加权特征参数,以及非加权特征参数集聚系数进行网络测度分析,并进行网络最小生成树分析;以网络分析结果为基础,从路网、通道、客运、货运四个方面对铁路规划项目功能进行定量化综合定位,宝汉铁路为宁陕及陇东地区与川渝地区间南北纵向新通道的骨架干线,是一条以货为主、客货共线的区域路网干线铁路。

Research on Function Orientation of Baoji-Hanzhong Railway Based on Network Measurement

Aiming at the function orientation for railway planned project with insufficient objectivity qualitative analysis,this paper takes Baoji-Hanzhong railway as the research object to select passenger travel time and transportation distance between nodes for the weight to construct the passenger and freight transportation network topology model for regional rail network by means of the Space L method. With the adoption of complex network analysis method based on the idea of "with and without comparison"and hierarchical line technical standards,along with the combination of Pajek software and R software,network measurement analysis is executed by calculating the weighted characteristic parameters such as network diameter,average distance,edge betweenness,network efficiency,and unweighted cluster coefficient; in the meantime,the minimum spanning tree is analyzed. Finally,integrated and quantitative function orientation is conducted in terms of network,channel,passenger and freight transportation based on network measurement results. Baoji-Hanzhong railway is the trunk line of the new vertical channel from north to south between Ningxia-Shanxi-Eastern Gansu and Sichuan-Chongqing regions,and a regional trunk line of mixed passenger and freight transportation.