交通运输系统工程与信息 ›› 2013, Vol. 13 ›› Issue (1): 118-.

• 系统工程理论与方法 • 上一篇    下一篇

基于认知更新的随机动态分配模型

张玺,郭洪洋,刘海旭*,李延来,蒲云   

  1. 西南交通大学 交通运输与物流学院,成都610031
  • 收稿日期:2012-09-18 修回日期:2012-11-08 出版日期:2013-02-25 发布日期:2013-03-04
  • 作者简介:张玺(1982-),男,重庆人,博士生.
  • 基金资助:

    国家自然科学基金项目(50908196,51278429);中央高校基本科研业务费专项资金(SWJTU09CX041).

Perception Updating Based Stochastic Dynamic Assignment Model

ZHANG Xi, GUO Hong-yang, LIU Hai-xu, LI Yan-lai, PU Yun   

  1. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2012-09-18 Revised:2012-11-08 Online:2013-02-25 Published:2013-03-04

摘要:

研究先进出行者信息系统(ATIS)环境下道路网络系统流量的随机动态变化,有利于实现ATIS在网络系统中的进一步优化配置.在出行者经验积累过程基础上,引入ATIS作用下的认知更新过程,将路网系统的路径流量明确视为随机变量,提出了一个基于认知更新的随机动态分配模型.证明了该模型产生的路径流量渐近收敛于一个平稳概率分布.在算例网络中验证了模型的可行性,模拟有ATIS和无ATIS两种情形下路径流量的随机动态变化.结果表明,两种情形路径流量均收敛于平稳概率分布.前者的平均流量近似于随机用户平衡(SUE),而后者的平均流量不是平衡流量,但其网络总费用要低于前者.

关键词: 系统工程, 随机动态分配, 随机过程, 道路网络, 先进出行者信息系统, 随机用户平衡

Abstract:

Traffic network systems endogenously display both stochasticities and dynamics with vehicle flows formed from aggregated travelers in response to their previous experiences and the information provided by Advanced Traveler Information Systems (ATIS). In consideration of the day-to-day trip-making decisions of travelers, a perception-updating-based stochastic dynamic assignment model is proposed to describe the evolution of the traffic network flow pattern. In this model, the route flows are treated explicitly as random variables and the distribution of them is proved to asymptotically converge to a stationary probability distribution. A simulation algorithm is developed for implementing the model. Numerical results under two scenarios, with and without ATIS, are also provided for comparing the stochastic dynamics of route flows.

Key words: system engineering, stochastic dynamic assignment, perception updating, road network, ATIS

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