预防交通网络级联失效的重要路段与节点扩容策略

发布时间：2018-06-24 06:17

本文选题：城市道路交通网络 + 复杂网络　；参考：《长沙理工大学》2015年硕士论文

【摘要】：城市道路交通网络具有复杂网络特性,级联失效是城市道路交通网络的重要特征。建立城市道路交通网络级联失效模型,分析级联失效的传播过程,探寻级联失效预防与控制措施,提高城市道路交通网络的运行安全性、可靠性,具有重要的理论及实际意义。本文研究城市道路交通网络级联失效的预防策略,通过对重要路段与重要节点进行扩容,可以预防级联失效的发生,主要研究工作包括：(1)考虑级联失效的事件性重要路段(节点)识别模型研究。根据城市道路交通网络中路段(节点)特征,将其重要路段(节点)分为常规性和事件性两类。基于删除法,提出考虑级联失效的事件性重要路段(节点)识别方法,认为边(节点)删除后引发的级联失效后果越严重,说明该边(节点)越重要,从而可以有效的选择事件性重要路段(节点)。(2)考虑级联失效的重要路段与重要节点扩容策略。本文解决了扩容策略的两个关键问题：1)扩容路段和节点的选择；2)路段与节点扩容量的优化确定。首先根据重要性初选扩容的重要路段与重要节点,然后不断试算扩容量,根据扩容后的效果终选扩容的重要路段(节点)及其最佳扩容倍数。最后给出了计算流程,并进行了试验分析,验证了该算法的有效性。(3)考虑级联失效的路口路段联合扩容策略。道路交通网络是通过路段和路口连接的整体,单独的路口扩容策略、路段扩容策略往往不能有效的提高整个路网的通行能力(或提高路网抵抗级联失效的能力)。因此,本文提出了路口路段的联合扩容策略。即首先选定需扩容的整体单元集；分别试算整体单元中的路段和节点的扩容量,求得整体扩容量；然后选取扩容量最小的整体单元为最佳扩容整体单元,其对应的扩容量为最佳扩容量。最后给出了详细的计算流程,并通过试验分析,验证了该算法的有效性。
[Abstract]:Urban road traffic network has complex network characteristics, cascade failure is an important feature of urban road traffic network. It is of great theoretical and practical significance to establish a cascade failure model of urban road traffic network, to analyze the process of cascade failure propagation, to explore the prevention and control measures of cascade failure, and to improve the safety and reliability of urban road traffic network. In this paper, the prevention strategy of cascade failure of urban road traffic network is studied. By expanding the capacity of important road sections and important nodes, the cascade failure can be prevented. The main research work includes: (1) the identification model of event important sections (nodes) considering cascade failure. According to the characteristics of road sections (nodes) in urban road traffic networks, the important road sections (nodes) are divided into two categories: routine and event. Based on the deletion method, this paper proposes an event recognition method for important sections (nodes) considering cascade failure. It is considered that the more serious the consequence of cascade failure caused by edge (node) deletion, the more important the side (node) is. Therefore, the event-important section (node). (_ 2) can be effectively selected to consider the cascade failure of the important section and important node expansion strategy. In this paper, two key problems of expansion strategy are solved: 1) selection of expansion sections and nodes, and 2) optimal determination of expansion capacity of sections and nodes. First, according to the importance of the primary expansion of important sections and important nodes, and then continue to try to calculate the expansion capacity, according to the effect of the expansion of the final selection of important sections (nodes) and the best expansion multiple. Finally, the calculation flow is given, and the experimental analysis is carried out to verify the effectiveness of the algorithm. (3) the joint capacity expansion strategy of intersection considering cascade failure is proposed. The road traffic network is a whole through the link between the road section and the intersection. The expansion strategy of the road link can not effectively improve the capacity of the whole road network (or the ability of the road network to resist the cascade failure). Therefore, this paper puts forward the joint expansion strategy of intersections. That is, first of all, select the whole unit set that needs to be expanded; try to calculate the expansion capacity of the section and node in the whole unit, and then select the whole unit with the smallest expansion capacity as the optimal expansion integral unit, The corresponding expanding capacity is the optimum capacity. Finally, the detailed calculation flow is given, and the validity of the algorithm is verified by experimental analysis.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491

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