城市道路网络演变模型

Evolution Model of Urban Road Network

摘要:

为了探寻城市道路网络的内在演变规律,基于叶脉生长模型,提出了道路网络演变模型,分析路网中节点的生成规律;根据道路网络的特点,提出生成节点与已有路网的连接规则.以上海市浦东新区为研究对象,研究节点新增比例与经济、人口等指标的关系,提出了节点新增比例模型.按照提出的演变模型,模拟研究年的道路网络,对比实际路网和模拟路网的一些复杂网络指标.结果表明,该模型能较好地模拟实际路网的变化.

关键词:网络演变; 城市道路网络; 复杂网络; 节点生成

Abstract:

In order to explore the evolution rule of urban road network,the paper presents a road network evolution model based on the vein growth model and an analysis of the generation mechanism of new nodes in the network.According to this mechanism,a connection rule among the generated nodes and existing road network was established.A case study was made of Pudong New District of Shanghai on the relationship among nodes generation proportion and indicators such as economy and populations,and a node generation proportion model was proposed.The proposed network evolution model was employed to simulate the evolution of road network in different years.Some complex network indicators were defined to compare the actual and simulated road network.The results demonstrate that the road network evolution model is able to simulate the evolution of the actual road network.

Key words:network evolution; urban road network; complex network; node generation