张彤, 马帅, 沈宏. 面向公平分配的时变应急服务覆盖优化[J]. 武汉大学学报 ( 信息科学版), 2017, 42(12): 1681-1687. DOI: 10.13203/j.whugis20150065
引用本文: 张彤, 马帅, 沈宏. 面向公平分配的时变应急服务覆盖优化[J]. 武汉大学学报 ( 信息科学版), 2017, 42(12): 1681-1687. DOI: 10.13203/j.whugis20150065
ZHANG Tong, MA Shuai, SHEN Hong. Equity-Oriented Time -Varying Emergency Management Service Coverage Optimization[J]. Geomatics and Information Science of Wuhan University, 2017, 42(12): 1681-1687. DOI: 10.13203/j.whugis20150065
Citation: ZHANG Tong, MA Shuai, SHEN Hong. Equity-Oriented Time -Varying Emergency Management Service Coverage Optimization[J]. Geomatics and Information Science of Wuhan University, 2017, 42(12): 1681-1687. DOI: 10.13203/j.whugis20150065

面向公平分配的时变应急服务覆盖优化

Equity-Oriented Time -Varying Emergency Management Service Coverage Optimization

  • 摘要: 应急服务需要根据实际情况在城市的某些区位中提前布置,才能保证需求发生时能在规定时间内到达需求位置,提供应急服务。布置区位时,需要根据时变交通条件的变化,适当考虑时空的合理分布,以为城市居民提供较为公平的服务覆盖。传统最大区位覆盖模型较少考虑服务的公平分配,特别是在时变交通和复杂大规模路网条件下,缺乏对公平量度的显式建模。基于目前区域覆盖优化模型的最近进展,扩展了传统最大区位覆盖模型,建立面向公平分配的时变应急服务覆盖模型,提出了相应的启发式高效求解方法。利用武汉市数据进行实验验证,证实模型求解得到的区位配置解较之传统模型,不仅提供了更加公平的应急服务覆盖,也考虑到了时变交通条件,改善了应急资源在时空上的均衡配置水平,整体上提高了应急服务质量。

     

    Abstract: Emergency management services, such as emergency medical service, disaster relief, and homeland security, are required to be located in specific locations according to realistic situations. They are supposed to reach the scene within a target time and deliver emergency management services. In light of time-varying traffic conditions, these services should be relocated accordingly. Further, equality should be accounted for to provide reasonable service distribution. Traditional regional coverage models rarely explicitly consider equality issue. In particular, the relationships between service distribution and model constraints are usually not modeled given time-varying traffic conditions with complex road networks. Based on recent progress in regional coverage modeling, this study extends traditional location set covering models and establishes a time-varying emergency management service coverage model that explicitly considers equality. We further introduce an efficient solution algorithm and perform a comprehensive comparative analysis of three equality constraints. The experiments with Wuhan road networks demonstrate that our model can obtain more equable service coverage than traditional models, thus promoting the quality of emergency management services.

     

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