城市群城镇交通网络特性研究

为了研究城市群城镇交通网络特性,本文运用primal approach方法以城镇为节点,以其之间的道路为边构造长沙城镇交通网络、株洲城镇交通网络等城市群城镇交通网络模型,使用Matlab和VC++6.0分别对它们的平均度、网络密度、聚集系数、平均最短路径、随机网络聚集系数、随机网络平均最短路径、网络结构熵、全局系数等网络特性指标进行计算和比较分析,得到以下结论:(1)城市群城镇交通网络都具有小世界性,是小世界网络;(2)城市群城镇交通网络都不存在幂律特征,不存在无标度性,不是无标度网络;(3)城市群城镇交通网络都不存在指数特征,不是随机网络;(4)城市群城镇交通网络中,长株潭城市群市县交通网络整体效率最高、网络密度最大,长株潭城市群城镇交通网结构熵最小,表明其最有序。

The Properties of Traffic Networks in Urban Agglomeration

In order to research properties of traffic network of urban agglomerations, We design the model of Urban Agglomeration by primal approach to describle the Changsha traffic network, the Zhuzhou traffic network, the Xiangtan traffic network, the C-Z-T city traffic network, the C-Z-T city and town traffic network, the C-Z-T city and town traffic network. We use Matlab and VC++6.0 to figure out averaged-degree, averaged-clustering coefficient, betweenness centrality of roads with degree and structure entropy based on node betweenness centrality, global coefficient. The results show that (1) traffic networks have small-world behavior but no scale-free property (2) traffic networks have not scale-free and random property, (3) the global coefficient of the C-Z-T city traffic network is greatest and the entropy of the C-Z-T city and town traffic network is smallest, which show it is in order.