【摘要】 根据货主对快运直达班列产品的需求,引入了货物发送、到达和运输时限3个"时间窗"来描述货物运输的相关时间要求。提出了以OD直达和"短途直达+组合直达"作为快运直达班列开行的两种基本形式,通过不同速度等级的组合提供6种不同层次的货物运输服务。建立了基于动态服务网络的快运直达班列开行方案优化模型,设计了基于加边、减边的启发式求解算法,设计算例对模型进行了验证,并分析了在网络中设计相同速度的服务与设计不同速度等级的服务对开行方案的影响。更多还原

【Abstract】 Based on the demand of express freight direct trains,the paper introduces three ’time windows’(departure,arrival and travel time) to describe the time requirement of freight transport.’OD express’ and ’short distance with compound express’ are proposed as the basic forms of express freight direct trains so that six kinds of service with different speed can be supplied.Furthermore,the paper establishes an optimized operation scheme model of express freight direct trains based on dynamic service network,designs a heuristic algorithm,shows an example to validate the model and analyzes the influences of designing the same speed service level and the different speed service level among networks in the operation scheme.更多还原