一、问题的提出在铁路运输生产中，为适应车流波动，保证运输任务的完成，必须有预见地进行车流调正，以确保及时供应装车所需空车、加速卸车站、编组站作业，以达到充分有效地使用机车车辆及线路通过能力，质量良好地完成国家运输任务之目的。 First, the issue raised In the railway transport production, in order to adapt to fluctuations in traffic flow, to ensure the completion of transport tasks, traffic flow must be predictable to ensure that the timely supply of empty car loading, accelerating unloading stations, marshalling yard operations, In order to achieve the full and effective use of locomotives and rolling stock through the ability to complete the national transport mission in good quality.