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科学合理的多机场系统场址选择是一项涉及众多因素和利益主体的重要决策问题，就是要使系统中各机场容量协调并使系统收益最大化. 在分析旅客机场随机性选择行为基础上，构建双层规划模型来描述多机场系统场址选择决策过程中多目标价值准则，定量研究宏观机场决策者与微观旅客的相互作用. 模型上层规划从决策者的角度出发，使总的机场建设费用最小，下层规划则描述旅客机场选择行为，并使其总的出行费用最小. 考虑到变量的离散特性，文章分析了求解所构模型的方法，并通过实例模型的求解来检验模型和算法的可行性和有效性. 实例计算表明，双层规划模型的多价值准则决策方法更接近实际情况，在多机场系统选址规划中具有一定的实用性，对优化机场资源配置和提高机场竞争力具有现实意义.

Bi-Level Programming Model for Airport Location in the Multi-Airport Region

Scientific and rational selection of multi-airport site is one of the important decision-making problems which involve a number of factors and different interests groups, and generate coordinated capacity of each airport system and maximum benefits. Based on impact analysis of the departing air travelers' airport random choice behavior a bi-level programming model is proposed to describe the multi-objective criteria in the process of location decision in the multi-airport region. The upper level model is to maximize the decision makers' benefits and the lower level model describes the travelers' airport choice behavior. Thus, benefits of both traffic decision makers and air travelers are considered in the proposed model. The heuristic algorithm is used to solve the model. Finally, an example is used to show the validity and rationality of the proposed model. The results indicate that the multicriteria decision making method is close to the actual situation, and it has practical significance in the aspect of optimizing airport resource allocation and improving airport competitiveness in multiple airport region.