模型以各救援设施覆盖的需求点全部收益期望值最大作为目标，以各救援设施的位置和各救援设施分别覆盖哪些需求点作为决策变量。
The objective function is to maximize the total expected demand covered, and the decision variables are the selected location sites and the respective response facilities for every demand nodes.
模型以各救援设施覆盖的需求点全部收益期望值最大作为目标，以各救援设施的位置和各救援设施分别覆盖哪些需求点作为决策变量。
The objective function is to maximize the total expected demand covered, and the decision variables are the selected location sites and the respective response facilities for every demand nodes.
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