作者结合面向对象的设计思想，提出了一种实用的网络计划模型，并实现了实用网络计划工具类组件。
In this paper, based on object-oriented technique, an applied arrow network model is studied and a component of arrow network tools is developed.
结合完工隶属函数，给出了安全时差的计算模型，通过安全时差的计算结果，能够合理地反映出网络计划模型中潜在的不确定性的影响程度。
Furthermore, an approach for calculating the safe float is given, by which the influence of the potential uncertainty in network could be reflected rationally.
在时间-费用关系为非线性的假设下，建立求网络计划最低成本日程的优化模型。
An optimization model to find the lowest budget schedule of network planning is established under the assumption that the time-cost relationship is nonlinear.
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