基于拓扑强度的城市道路网络层次表达

Hierarchical Representation of Urban Road Network Based on Topological Intensity

复杂网络理论是进行网络拓扑分析的一个重要工具。现有的研究大多是利用复杂网络理论研究城市道路网络的整体拓扑结构,从而难以衡量每条道路在维持整个路网拓扑连通性方面的能力。本文提出了一种道路网络拓扑强度层次表达模型。首先,研究城市道路网络中每条道路在维持路网拓扑连通性方面的重要程度,提出了一种定量描述指标,即拓扑强度;然后根据拓扑强度对道路网络进行层次表达;最后采用层次表达模型对长沙市道路网络进行实验分析,验证了该模型的合理性和有效性。

Complex network theory is an important topological analytic for networks.Current work applies complex network theory to address the entire topology of an urban road network but lacks capability to measure the influence of each road segment in maintaining the entire road network topology connectivity.In this article,a hierarchical representation model of road network topology intensity is proposed.The importance of the role each road segment plays in maintaining the topology connectivity of the entire network,topology intensity,is determined.Street networks are represented as a hierarchical model based on topology intensity.Experiments were conducted with the street networks of Changsha city.The rationality and the effectiveness of the hierarchical representation model were validated from an analysis of the experimental results.