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Solving a multi periodic stochastic model of the rail-car fleet sizing by two-stage optimization formulation

机译:用两阶段优化公式求解轨道车辆车队规模的多周期随机模型

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摘要

We propose a formulation and solution procedure for optimizing the fleet size and freight car allocation under uncertainty demands. There are important interactions between decisions on sizing a rail-car fleet and utilizing that fleet. Consequently, the optimum use of empty rail-cars for demands response in the length of the time periods one of advantages the proposed model. The model also provides rail network information such as yard capacity, unmet demands, and number of loaded and empty rail-car at any given time and location. Consequently, the model helping managers or decision makers of any train company for planning and decision making. We propose two-stage solution procedure for solve rail-car fleet sizing problem. Numerical examples are given to illustrate the model and solution methodology.
机译:我们提出了一种在不确定性需求下优化车队规模和货车分配的方案和解决方案。在确定有轨电车车队的规模和利用该车队的决策之间存在重要的相互作用。因此,空轨道车在时间段内的需求响应的最佳利用是所提出模型的优势之一。该模型还提供了铁路网络信息,例如堆场容量,未满足的需求以及在任何给定时间和位置的已装载和空车的数量。因此,该模型可以帮助任何火车公司的经理或决策者进行计划和决策。我们提出了两阶段的解决程序,以解决铁路车队的规模问题。数值例子说明了模型和求解方法。

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