基于重力p-median模型的支线机场物资供应中心选址

为解决偏远地区支线机场的物资供应问题，依托地区物流中心建立机场物资供应中心，从而实现地区物流中心的货物运输到各支线机场总成本最低、配送效率最高、综合效益最大。首先基于Voronoi图理论，形成了区域机场Voronoi图，采用重心法，确定出备选点位置；将重力p-median模型用于机场物资供应中心的选址，以可变运输总成本最小为目标函数，根据重力模型原理，结合机场物资供应中心点的吸引力、供应点到需求点的距离以及各机场物资需求量，采用改进的免疫优化算法，运用Matlab编程进行仿真，利用算例对选址模型进行仿真求解。仿真结果表明，p-median模型在算例中的应用，可以得出较为理想的机场物资中心选址，具有较强的实用性和可操作性。

Location of regional airport supply center based on gravity p-median model

To address the issue of provision of airport supplies in remote areas, airport material supply centers are established based on regional logistics centers. As a result, the total cost of the regional logistics center’s cargo transportation to each branch airport is lowest, distribution efficiency is highest, and comprehensive benefits are immense. First, the regional airport Voronoi diagram is formed based on the Voronoi diagram theory, and the center of gravity method is used to determine the location of candidate points. Second, the lowest total system cost is considered as the objective function based on the gravity p-median model. According to the gravity model principle, the model combines airport material supplies, attraction of the central point, distance from the supply point to the demand point, and analysis of the demand for the materials of each airport. Using the improved immune optimization algorithm, Matlab programming, the location model was simulated. Simulation results show that based on the application of p-median model in the example, an ideal airport material center selection can be achieved. The model exhibits excellent practicability and operability.