公共自行车加权有向网络建模与仿真  

Modeling and Simulation of Weighted Directed Network for Public Bicycles

作　　者：申江龙 SHENG Jiang-long

机构地区：[1]陕西地建土地工程技术研究院有限公司,陕西西安710075 [2]陕西省土地工程建设集团有限责任公司 [3]自然资源部退化及未利用土地整治工程重点实验室 [4]陕西省土地整治工程技术研究中心

出　　处：《内蒙古公路与运输》2021年第6期53-59,共7页Highways & Transportation in Inner Mongolia

基　　金：青年科技新星计划项目(2020KJXX-051,2021JQ-961)。

摘　　要：对网络结构特征研究是理解复杂系统功能的关键。文章针对公共交通网络,理解网络的拓扑特征,可以为交通系统的规划和设计提供参考。现有的公共交通网络建模集中在公交和地铁网络,公共自行车系统作为城市公共交通中不可缺少的一部分却缺乏关注。为了说明公共自行车系统的演化机制,构建了流量加权有向网络、时间加权有向网络、时效网络三种网络模型,提出了强度差分布与单位强度分布,结合度分布、强度分布、边权分布等拓扑指标来分析网络的拓扑特征;针对时效网络,揭示了其统计特征的演化过程;利用纽约Citi Bike系统的数据进行仿真分析,验证了所提出模型和拓扑参数的有效性。The study of network structure characteristics is the key to understand the function of complex systems.In view of the public transport network,understanding the topological characteristics of the network can provide reference for the planning and design of the transport system.Existing public transportation network model mainly focuses on bus and subway networks.As an indispensable part of urban public transport,the public bicycle system lacks attention.To explain the evolution mechanism of the public bicycle system,this paper constructs three network models,including traffic weighted directed network,time weighted directed network,and temporal network.The intensity difference distribution and the unit intensity distribution are newly proposed.Topological indicators such as degree distribution,intensity distribution,and edge weight distribution are combined to analyze the topological characteristics of the network.The evolution process of statistical characteristics of temporal network is revealed.Finally,the validity of the proposed model and topological parameters is verified by simulation analysis using data from Citi Bike system in New York.

关 键 词：公共自行车系统 流量加权有向网络 时间加权有向网络 时效网络 拓扑特征 

分 类 号：U484[交通运输工程—载运工具运用工程] TP311.13[交通运输工程—道路与铁道工程]