Multi-ObjectiveLinear-Programming Model and Its Algorithmfor Car Flow Routing with Bidirectional Heavyand Empty Cars in Railway Network

On the basis ofanalyzing the previous papers published at home and abroad, and considering the specialcharacteristic of Chinese railways, the paper presents a multi-objective programming modelof car flow routing with bidirectional heavy and empty cars in a railway network, in whichthere are six objectives, twelve system constraints and two sets of non-negativeconstraints.The paper improves the GP-STEM algorithm and a case of study on the model iscarried out.