It also gives a construction approach for approximating the probability density function of activity duration, which will facilitate the computer simulation of the PERT diagram.

本文还给出了一种简练的函数构造法，用该方法构造的函数能较好地逼近活动工期概率密度函数，方便了对计划网络图的计算机仿真运算。

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In addition, parents can actively monitor their child's online activity, limit play time duration and provide a virtual allowance for purchasing apps via MEEP!

ENGADGET: Oregon Scientific MEEP! tablet ships for $150, gives kids a safe, exclamation-filled place to play

In technology, a stateful activity or session sets an agreement for all the resources along the path of process flow to be solely assigned for the duration of the activity.

FORBES: Is Your Employment Model Too Stateful?

Sleep duration did not significantly affect cancer risk for women of any age in the lower physical activity bracket.

CNN: Exercise plus sleep may lower cancer risk in women