提出了一种简化的确定关键路径方法，该方法可分别运用于单代号和双代号网络图中。

This paper put forward a simplified method that can be used on activity on node network and activity on line network to identify the critical path of schedule.

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设计并开发了单代号网络图自动绘制系统，生成的网络图逻辑关系清楚、布局合理、直观清晰。

The software automatic plotting activityonnode network is developed, and the diagram plotted by it has clear logical relations, rational layout and simple appearance.

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文章通过对双代号网络、单代号网络及时标网络的对照及论证，得出虚工作的时间参数可以不计算的结论。

With the demonstration and comparison of activity-on-arrow network and time-scaled network in this paper, proper conclusion is expected to drawn.

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