根据货物运输作业过程的实际需求，提出动态车辆调配问题，明确给出确定性动态车辆调配问题的定义，并利用网络图对问题进行描述。

Under some demands in process of freight transportation, the deterministic dynamic vehicle allocation problem is brought forward and defined. And the network chart is used to depict this problem.

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介绍了一种确定网络图关键线路的新方法——结点时差法。

This paper introduces a new method of determining the critical path of the network chart-node slack method.

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该方法只需计算出结点最早开始时间和最迟结束时间，便可确定出网络图的关键线路。

This method only needs computing the earliest start -time and the lastest finish-time of the node. Thus you work it out.

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