Hierarchical Optimization Model and Empirical Study on Metropolitan Emergency Material Depository NetworkA Case Study of Beijing-Tianjin-Hebei Metropolitan
Constructing an emergency material depository network with hierarchical and multi-objective characteristics is of great practical significance for the positive interaction of urban emergency material depository and the coordinated development of urban emergency material depository network.Based on the actual situation of metropolitan,the traditional hierarchical facility location model was improved.To achieve the goals of maximum total satisfaction of the people in disaster-affected location for receiving the allocation of emergency materials,the highest total correlation degree among the emergency material depositories,and the minimum cost of the construction and storage of emergency materials,the hierarchi-cal facility location optimization model of the emergency material depository network of metropolitan was constructed.According to the hierarchical and multi-objective characteristics of the constructed model,the traditional two-stage heuristic algorithm was extended and a three-stage heuristic algorithm was designed.Taking the Beijing-Tianjin-Hebei Metropolitan as an empirical region,the optimization results showed that the constructed model was robust and the designed algorithm could solve the model effectively.Six region-level emergency material depositories such as Beijing,Tianjin and Shijiazhuang should be constructed,and a three-level network structure of emergency material depositories,including region-level emergency mate-rial depositories,municipal emergency material depositories,and county(city,district)emergency mate-rial depositories,should be further formed.
emergency material depository networkhierarchical multi-objective facility locationthree-stage heuristic algorithmBeijing-Tianjin-Hebei Metropolitan
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