Coordinated Optimization of Wagon Calculating and Taking-Out and Placing-In Wagons Applying Bi-Level Programming Model

Wagon-flow allocation problems and shunting locomotive utilization are the two important problems that need to be solved in station stage plan. Because the wagons ready to be taken out from freight yards (special lines) are one of the wagon flow's resources of the departure trains, considering the close connection among breaking up operation, marshalling operation, taking-out and placing-in operation, and shunting locomotive activity, takes the shunting locomotive as the core and the breaking up order arrangement of arrival trains, marshalling order arrangement of departure trains, the timing and content of taking-out and placing-in as well as wagon calculating as a whole, and the builds the corresponding bi-level programming model.