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主办:中国优选法统筹法与经济数学研究会
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中国管理科学 ›› 2024, Vol. 32 ›› Issue (2): 108-118.doi: 10.16381/j.cnki.issn1003-207x.2021.2181

• • 上一篇    

分流模式下k-避难点选址策略研究

李红梅1,张湘玥1,罗太波2(),徐寅峰3   

  1. 1.西北大学经济管理学院, 陕西 西安 710127
    2.西安电子科技大学经济与管理学院, 陕西 西安 710126
    3.西安交通大学管理学院, 陕西 西安 710049
  • 收稿日期:2021-10-25 修回日期:2022-05-01 出版日期:2024-02-25 发布日期:2024-03-06
  • 通讯作者: 罗太波 E-mail:tbluo@xidian.edu.cn
  • 基金资助:
    教育部人文社会科学研究项目(18YJC630114);国家自然科学基金项目(71701162);陕西省自然科学基金项目(2022JM-425)

Minsum k-sink Location Problem on Dynamic Path Networks with Non-confluent Flow Constraint

Hongmei Li1,Xiangyue Zhang1,Taibo Luo2(),Yinfeng Xu3   

  1. 1.School of Economics and Management, Northwest University, Xi’an 710127, China
    2.School of Economics and Management, Xidian University, Xi’an 710126, China
    3.School of Management, Xi’an Jiaotong University, Xi’an 710049, China
  • Received:2021-10-25 Revised:2022-05-01 Online:2024-02-25 Published:2024-03-06
  • Contact: Taibo Luo E-mail:tbluo@xidian.edu.cn

摘要:

避难点选址是否合理直接影响灾害发生时避难疏散效率。本文在道路通行能力不同的动态路图中,以总避难时间最小化为目标,研究允许分流疏散的k-避难点选址问题。首先,根据任意相邻避难点间划分点的唯一性,找出最优划分点及其对应的权重划分。其次,考虑道路通行能力约束,分析人流汇合和堵塞的动态变化过程,将原路图转化为无汇合状态的等价路图。接着,基于动态规划方法,设计了时间复杂度为Okn3的求解算法。最后,通过算例分析可知,相比合流模式,分流模式的整体优化效果会随着避难点数量的增加而更加显著。

关键词: 避难点选址, 分流模式, 总避难时间, 动态规划

Abstract:

Over the past few decades, public healthy and security have been threatened by various natural disasters, accidents, and events occurred throughout the world. The losses the disasters bring can be decreased with appropriate emergency shelter locations. In this paper, the k-sink location problem in dynamic path networks under the non-confluent flow constraint is considered, with the goal of minimizing the total completion time. A dynamic path network is consisted of an undirected path with positive edge lengths, general edge capacity, and positive vertex supplies. For each edge, a general traffic speed is given to indicate the time that a unit weight need to travel a unit distance on this edge. The weight on the same vertex can be evacuated to different shelters during the evacuation, i.e., the non-confluent flow constraint.Firstly, according to the uniqueness of the divider between any two adjacent sinks, the optimal dividers and the corresponding weight division are determined. Secondly, the congestion situation during the evacuation is detailed analyzed, and based on that, the original dynamic path network is transformed to a new path network with new vertex weight. And no congestion occurs during the evacuation on the new dynamic path network. Thirdly, an Okn3-time algorithm is proposed based on dynamic programming.Numerical experiments and a practical example are both presented in this paper. The practical example is based on a road in Chang’an district, Xi’an. Numerical results show that as the number of sinks increases, the non-confluent flow model is more effective. According to the results of the practical example, the feasibility and effectiveness of the proposed algorithm are verified. To improve the efficiency of evacuation, non-confluent evacuation model will be a general trend. The models and algorithms constructed in this paper can provide theoretical support for future research and practical application.

Key words: sink location problem, non-confluent flow, total completion time, dynamic programming

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