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| 基于关键路段的路网可靠性的改进 | |
| 引用本文： | 刘海旭,蒲云. 基于关键路段的路网可靠性的改进[J]. 西南交通大学学报, 2006, 41(5): 645-648 |
| 作者姓名： | 刘海旭 蒲云 |
| 作者单位： | 西南交通大学交通运输学院,四川,成都,610031 |
| 基金项目： | 四川省应用基础项目（D2JY029-116） |
| 摘 要： | 为简化资源约束下路网可靠性的改进问题，只选择关键路段（即被选择的概率大于预定阀值的路段）进行改进．由于出行者在事件（例如地震、洪水、飓风等）前后的路径选择行为用弹性需求随机用户平衡刻画，路段的选择概率可以基于路段水平有效求得，因而容易确定关键路段．建立了以路网净经济效益相关的可靠性最高为目标，并有资源约束的数学模型．提出了模型的一种启发式算法．算例的结果表明了该方法的有效性． |
| 关 键 词： | 可靠性 路网 净经济效益 随机用户平衡 关键路段 改进 |
| 文章编号： | 0258-2724（2006）05-0645-04 |
| 收稿时间： | 2006-02-20 |
| 修稿时间： | 2006-02-20 |
Improvement of Road Network Reliability Based on Critical Links |
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| LIU Hai-xu,PU Yun. Improvement of Road Network Reliability Based on Critical Links[J]. Journal of Southwest Jiaotong University, 2006, 41(5): 645-648 | |
| Authors: | LIU Hai-xu PU Yun |
| Affiliation: | School of Traffic and Transp. , Southwest Jiaotong University, Chengdu 610031, China |
| Abstract: | To simplify the problem of improving road network reliability with limited resources,only critical links,which are chosen by travelers with higher probabilities than a prescribed threshold,were selected.Because stochastic user equilibrium with elastic demand is used to characterize the travelers' route choice behaviors before and after incidents(e.g.,earthquakes,floods,hurricanes,etc.),the link choice probabilities can be computed in an efficient link-based manner,and the critical links can be easily determined.A mathematical model was presented,in which the highest reliability corresponding to net economic benefit was taken as the objective for the road network subject to a resource constraint.A heuristic algorithm for the model was designed.The results of a numerical example were presented to show the effectiveness of the proposed method. |
| Keywords: | reliability road network net economic benefit stochastic user equilibrium critical link improvement |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |