基于脆弱性原理和模糊机会约束的编组站重要度评估方法.docVIP

 基于脆弱性原理和模糊机会约束的编组站 重要度评估方法 范振平* 5 10 15 20 25 30 （北京交通大学机械工程博士后流动站，北京 100044） 摘要：基于复杂网络中的脆弱性原理，提出了一种通过移除编组站节点后路网车流组织费用 的变化来评价其重要度的方法。在节点移除的过程中保留邻边，维持路网结构和车流径路的 稳定。以充分利用运力资源为宗旨，构建了基于模糊机会约束的车流组织费用最小化模型。 采用改进的禁忌算法完成模型的求解，设置了多个初始解并根据约束条件的特点设定解的编 码形式及邻域的有哪些信誉好的足球投注网站策略。案例研究表明，本文提出的方法能够全面、准确地反映编组站在 路网中的作用和地位，评价效果较脆弱性原理更符合实际，模型和算法的有效性得到了验证。 关键词：铁路运输；编组站；脆弱性；模糊机会约束；重要度评估 中图分类号：U291 An Evaluation Method of Marshalling Yard Importance Based on Vulnerability and Fuzzy Chance Constraints Theories FAN Zhenping (Postdoctoral Research Station of Mechanical Engineering, Beijing Jiaotong University, Beijing 100044) Abstract: Based on the vulnerability of complex network theory, a method is proposed in this paper which utilizes the change of network traffic organization cost after removing the marshalling yard to evaluate the importance of this station. In order to maintain the structure of railway network and the stability of traffic flow path, the adjacent links are reserved when removing the nodes. To make full use of transport resource, a model aiming to minimize the traffic organization cost based on the fuzzy chance constraint is built here. Applying the improved tabu search algorithm to estimate the model, where multiple initial solutions are set and the encoding of the solutions as well as the neighborhood search strategy are generated according to the characteristics of constraints. The empirical analysis shows that the proposed method can comprehensively and accurately reflect the role and status of the marshalling yard in the network, in addition, comparing with the result derived from vulnerability theory, this evaluation result is more plausible, which implies the validity of the model and algorithm. Keywords: Railway transport; marshalling yard; vulnerability; fuzzy chance constraint; importance evaluation 35 0 引言 目前，全路的编组站数量已由原来的 49 个缩减到 40 个，且继续呈现改编集中化的趋势。 在高铁陆续建成通车、既有线能力大规模释放的背景下，如何准确评价编组站在路网中的作 用和地位，实现运力资源的合理配置和充分利用，对优化编组站布局、提高运输组织效率等 40 具有重要的意义。 不少专家和学者在编组站布局规划以及合理性