关于美国西北大学David Boyce教授学术报告会的通知

发布时间： 2011-12-02

题目：静态交通分配问题解属性的挖掘（Solution Attributes of the Static Traffic Assignment Problem Revealed）
主讲人：Prof. David Boyce 美国西北大学(NU) 土木与环境工程系教授
时间：2011年12月8日（星期四）下午15:00
地点：交通大楼604会议室
欢迎广大师生参加。
                                             交通运输工程系
                                             土木与交通学院
                                              2011年12月2日

主讲人介绍：
    David Boyce教授目前担任美国西北大学土木与环境工程系教授、伊利诺伊芝加哥大学土木与材料工程系运输与区域科学方向名誉教授，重点从事城市交通出行预测模型、运输网络分配方法以及城市交通预测方法和实践历史的研究。他长期以来从事的另一个重点研究方向是大城市居民出行行为的集计模型的数学表述、执行、估计和效果评价。David Boyce教授还曾先后担任宾夕法尼亚大学（1966-77）、伊利诺伊大学香槟分校(1977-88)和伊利诺伊芝加哥大学(1988-2003)终身教授。2003年，他获得了Robert Herman Lifetime终身成就奖和INFORMS优秀会员奖，在2009年获得美国土木工程协会优秀会员奖。
Dr. David Boyce, P.E., is an Adjunct Professor in the Department of Civil and Environmental Engineering of Northwestern University, Evanston, Illinois, and Professor Emeritus of Transportation and Regional Science in the Department of Civil and Materials Engineering of the University of Illinois at Chicago. He presently conducts research on urban travel and location forecasting models, transportation network assignment methods, and the history of urban travel forecasting methods and practice. One of his long-term research interests concerns the formulation, implementation, estimation and validation of large-scale, integrated models of urban travel behavior, as an alternative to the traditional multi-step travel forecasting procedure.
Professor Boyce was a tenured faculty member of the University of Pennsylvania (1966-77), the University of Illinois at Urbana-Champaign (1977-88), and the University of Illinois at Chicago (1988-2003). In 2000 he was awarded the Founder’s Medal of the Regional Science Association International (RSAI) in recognition of his research achievements; in 2002, he was elected a Fellow of the RSAI. In 2003, he received the Robert Herman Lifetime Achievement Award of the Transportation Science and Logistics Section of the Institute for Operations Research and the Management Sciences (INFORMS). He also received the INFORMS Fellows Award in 2003, and the Fellows Award of the American Society of Civil Engineers in 2009.

报告概要：
常规的静态用户均衡交通分配模型能提供唯一确定的路段流量，但不能提供唯一的路径流量。2010年，Bar-Gera提出一种更有效的交通分配方法(TAPAS)，它可根据路径分配比唯一确定路径流量。尽管这种算法已成功应用于各种不同规模的运输网络，但是对于其中提出的“可替代路径对”的贡献尚未得到深入挖掘。此项研究通过对芝加哥地区网络中三种单一车型情形下的拥挤状态进行研究，检验了满足路径分配比条件的可替代路径集的作用，探索性地使用图形和地图表征所选择的可替代路径集来阐述结论，并提供了对TAPAS路径解结构的详细解释。对TAPAS的深入理解对于交通规划者更好地利用均衡分配路径流量解有着极为重要的意义。
The solution of the static deterministic user equilibrium (UE) traffic assignment problem uniquely determines total link flows but not route flows. In 2010, Bar-Gera proposed a computationally efficient algorithm, Traffic Assignment by Paired Alternative Segments (TAPAS), to determine route flows uniquely by incorporating a behaviorally justifiable condition of proportionality. Although TAPAS has been successfully applied to various scales of transportation networks, detailed solution attributes of the Pairs of Alternative Segments (PASs) that comprise the solutions of the UE model have not been explored. This paper examines the attributes of PASs found by solving the traffic assignment problem with the condition of proportionality for three single-class congestion scenarios for Chicago regional network. Exploratory, descriptive analyses using graphical and map representations of selected PASs are used to illustrate findings and substantiate conclusions, and to provide a detailed examination of the structure of the route flow solutions yielded by TAPAS. An improved understanding of the results from TAPAS will assure transportation planning practitioners an improved basis for their analyses especially when UE route flow solutions are required.

另注：兹定于12月9日（星期五）上午9:00在交通大楼518室召开广州市交通规划同行与DAVID BOYCE教授的研讨会，将邀请市内规划设计单位和其他院校学者参与，欢迎感兴趣的老师和有关人士参加。