【作者】 张鑫； 刘岳峰； 郑江华； 杜伟； 晏磊；

【Author】 ZHANG Xin LIU Yuefeng ZHENG Jianghua DU Wei YAN Lei (Institute of RS&GIS,Peking University,Beijing 100871)

【机构】 北京大学遥感与地理信息系统研究所；

【摘要】 交通网络由于其现实中的重要性、复杂性,需要新的研究视角来分析其特征,从而为解决交通的实际问题服务,"小世界"网络的研究适应了这种需求。"小世界"网络是具有相对较小平均路径长度和较大平均聚类系数的完全连通网络,有些学者针对交通网络的特点,对这个定义做了改进并结合一些具体的城市及交通方式,对其是否具有"小世界"特性做了验证分析。本文研究的北京公共交通网络是无尺度网络,也是小世界网络,其网络结构在现实中是基本合理的。"小世界"的理论为验证网络是否合理提供了检验方法,也为网络的规划、修改和扩充提供了理论参考依据。更多还原

【Abstract】 The transportation network is important and complex,so it needs to be studied from a thoroughly new perspective.The study of the small world net- work meets the need.The small world network is classically defined to be a wholly connected network with relatively small average path length and large av- erage clustering coefficient.Some scholars made some improvements on the mod- el based on the unique characters of the transportation network and also proved some certain cities or traffic modes to be with the small-world property.The public transportation network of Beijing is a scale-free network and also a small- world network.Its network structure is to some extent reasonable.Whether a network has the property of the small world is a method to judge whether the network is reasonable.更多还原