地理科学进展 ›› 2008, Vol. 27 ›› Issue (4): 117-121.doi: 10.11820/dlkxjz.2008.04.017

• 交通运输地理 • 上一篇    下一篇

基于时间阻抗函数的路网可达性研究

张生瑞,王超深,徐景翠   

  1. 长安大学公路学院,西安 710064
  • 收稿日期:2008-06-01 修回日期:2008-07-01 出版日期:2008-07-25 发布日期:2008-07-25
  • 通讯作者: 王超深(1985- ),男,主要研究方向为城市及区域规划.E- mail:pacific5241@126.com E-mail:pacific5241@126.com
  • 作者简介:张生瑞(1963- ),男,长安大学教授,工学博士、博士后,现为长安大学工程设计研究院院长.主要研究领域:交通规 划、交通运输可持续发展、交通安全与环保、综合交通运输等.E- mail:zhangsr@chd.edu.cn

Resear ch on Road Network Accessibility Based on Time Impedance Function

ZHANG Shengrui, WANG Chaoshen, XU Jingcui   

  1. School of Highway, Chang'an University, Xi'an, 710064 China
  • Received:2008-06-01 Revised:2008-07-01 Online:2008-07-25 Published:2008-07-25

摘要:

阐述了可达性的概念和在不同学科的应用范围,分析了可达性的影响因素,总结了现阶段在几何拓扑学上 常用的可达性量化方法,指出重力模型法、距离法、累计机会法的使用条件和不足。在这一基础上,发现现存的问题 主要是局限于空间尺度的量化不能准确地反应空间网络的联系程度,针对此问题,提出了基于时间阻抗函数的量 化模型,以实际交通量作为主变量,能间接地反应空间需求强度。随后引入了节点重要度的概念,能更加直接地反 映路网节点上社会、经济、交通等因素对可达性的影响,能很好地弥补时空法和效用法的不足。

关键词: 度量方法, 几何拓扑学, 节点重要度, 可达性, 时间阻抗函数

Abstract:

The paper elaborates the accessibility concept and application scope in the different disciplines simply, analyzes the factors influencing accessibility, summarizes quantification method used commonly at the present stage in geometry topology, points out application conditions and insufficiency of the gravity model, the distance model, the accumulation opportunity method. In this foundation, discovers that quantification limiting to the spatial criterion can not respond the relation of the spatial network accurately, in view of this question, proposes the quantification model basing on the time impedance function, which takes the main variable by the practice capacity. This model can respond the spatial demand intensity indirectly. Then the paper introduces the node importance concept,it can reflect factors influencing accessibility in the road network even more directly, such as society, economy, transportation. This model can make up for the insufficiency of space and time method.

Key words: accessibility, geometry topology, measure method, node importance, time impedance function