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邮政运输网络是邮政企业运营的重要保障,区县内运输网则是其关键的底层组成部分。从系统的优化目标、问题范围、车辆因素、时限及频次规定、运输成本等方面对邮政运输问题进行了系统的分析,依据区县邮政运输网络的特点,提出了针对降低固定成本和运输成本的字典序线性规划模型,并给出了求解该模型的遗传算法框架,实验仿真结果表明该模型对于邮政企业目前运行模式的调整和改进具有较好的指导意义。
The postal transport network is an important guarantee for the operation of the postal enterprises and the transportation network within the district and county is the key underlying component. According to the characteristics of the postal transportation network in the district and county, this paper systematically analyzes the postal transportation problems from the aspects of the optimization objective, the scope of the problem, the vehicle factors, the time limit and the frequency regulation, the transportation cost and so on. According to the characteristics of the postal transportation network in the county, Dictionary sequence linear programming model, and gives the genetic algorithm framework for solving the model. The experimental simulation results show that the model has good guiding significance for the adjustment and improvement of the current operating mode of the postal enterprises.