The problem is to determine the optimal replacement policy ( N , T )? such that the long-run expected cost per unit time is minimized.

利用几何过程，以系统大修次数N和大修时间间隔T为更换策略，选择最优策略（ N ， T）使系统经长期运行单位时间的期望费用最小。

youdao

It has similarly failed to respond to an invitation by European Union Foreign Policy chief Javier Solana for a new round of talks on its nuclear program with the five permanent U.N.Security Council member countries and Germany,the P5+1.

VOA: standard.2009.06.24

If you wrote only one policy, what's the probability distribution of x/n?

如果你只签了一份保单,那么x/n的概率分布是怎样的?

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Jay Schalin is director of state policy for the John William Pope Center for Higher Education Policy, Raleigh, N.

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But there was a catch: Helms insisted on U.N. policy changes that are still holding up the bulk of the payments.

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George Leef is the director of research and Jane Shaw is the president of the John W. Pope Center for Higher Education Policy in Raleigh, N.

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