Modeling cascade dynamics of railway networks under inclement weather

Modeling cascade dynamics of railway networks under inclement weather
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恶劣天气下铁路网级联动力学建模

DOI:
10.1016/j.tre.2015.05.009
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发表时间:
2015-08
影响因子:
10.6
通讯作者:
Qin Yong
Qin Yong
中科院分区:
工程技术1区
文献类型:
--
作者:
Wei Dali;Liu Hongchao;Qin Yong

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了解恶劣天气下的延迟传播的级联动力学对于积极主动的铁路管理至关重要。本文提出了一个开关最大加系统(SMPS)来模拟铁路网络上的延迟传播,它扩展了传统的MPS,通过合并多个系统矩阵来捕捉恶劣天气的动态影响。提出了一种基于全配对关键路径图的开关电源问题求解算法,该算法无需回溯先前事件即可计算次级时延。在人工网络和经验网络上进行了离散时间仿真,验证了所提出的模型及其求解算法的有效性。还利用脆弱性和扩散率的概念分析了铁路服务的稳健性。
Understanding the cascade dynamics of delay propagation under inclement weather is crucial to proactive railway management. In this paper, we proposed a Switching Max-Plus System (SMPS) to model the delay propagation on railway networks, which extends the conventional MPS by incorporating multiple system matrices to capture the dynamic impacts of inclement weather. An algorithm based on the All-Paired Critical-Path (APCP) graph was developed to solve the SMPS, which calculates secondary delays without backtracking the precedent events. The proposed model and its solution algorithm were validated using discrete-time simulations on both artificial and empirical networks. The robustness of railway services was also analyzed using the concepts of vulnerability and diffusivity.
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