用户平衡配流条件下易腐货物运输损耗研究

Research on the Loss of Perishable Cargo During Transportation While Clients Assigning Equilibrium Cargo Flow to Railway

易腐货物的运输损耗量是交通时间的函数,确定交通时间对于运输损耗的计算尤为重要。以易腐货物为研究对象,建立双层规划模型,上层为易腐货物运输损耗模型,下层为用户平衡配流模型。当路径中车流形成用户平衡配流状态时,用凸组合法对模型进行求解。并通过算例说明模型的计算和应用。

The loss of perishable cargo during transportation is the function of traffic time, so the confirmation of traffic time is important for the calculation of the kind of loss. A bi-level programming model is established with research object of perishable cargo, the upper level is the transport loss model of perishable cargo, and lower level is the clients＇ equilibrium traffic assignment model. The model shall be solved by Frank-Wolf algorithm when the clients＇ equilibrium assignment is formed in the routing flow. Then, an example is provided to illustrate the calculation and application of the model.