差异化运输产品开行设计优化模型研究

Design and Organization of Differentiation Transport Product of Railway

随物流服务发展的多元化、竞争的激烈化,铁路需要实施差异化战略增强竞争力.在车流组织过程中的优化是保证差异化实施的重要环节.本文在不同服务水平的约束下,以总开行成本最小为目标构建差异化铁路运输产品开行设计优化模型.考虑铁路运输每支车流的可选径路数量的规模,求出车流可选径路集,在此基础上为每支车流选择合适径路.针对模型特点,设计一种两阶段启发式算法进行求解.最后设计算例对模型与算法进行验证,算例结果表明,所提出的优化思想和方法对铁路运输组织有一定的借鉴意义.

With the diversification of logistics service development and the intensification of competition,the railway needs to implement differentiation strategy to improve its competitiveness.The optimization in the process of traffic organization is an important link to ensure the differentiation.Under the restriction of different service levels,this paper proposes the optimization model of the design and organization of differentiated transportation products of railway,with the object function of minimum total operation cost.Taking the number of optional route for each traffic flow into consideration,this study gets the optional route set for all the flows at first,and then selects a suitable route for each traffic flow.According to the characteristics of the model,this paper designs a kind of two-stage heuristic algorithm to solve it.Finally,this paper devises a numerical example to test and verify the model and algorithm.The results shows that the optimization ideas and methods proposed have a certain referential significance to the railway transportation organization.