The optimal harvesting policy problem is modified to be more reliable and better results are obtained.

对于最优捕获策略问题做了更实际的改进，得到了较好的结果。

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S&T policymaking procedure includes S&T policy problem acknowledgement, S&T policy agenda setting, S&T policy planning, and S&T policy legitimatizing.

科技政策制定的程序包括确认科技政策问题、建立科技政策议程、科技政策规划及科技政策合法化。

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Optimal maintenance policy problem in a system is discussed and analysed in this paper. Due to the random variable concerned, one objective mathematical model of expectation value is developed.

本文讨论了系统的最优维修策略问题，考虑到题目中所涉及的变量大多为随机变量，我们建立了单目标的期望值模型。

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The problem,he says, is that policy makers and planners have been slow to recognize this and to support such efforts.

VOA: special.2009.09.01

Still others said the problem was caused by the government's money policy.

VOA: special.2010.06.17

Cohen says part of the problem is an urban bias among policy elites in both the donor and affected countries.

VOA: standard.2010.07.16

And this is a major public policy problem, for at least two reasons.

CNN: Americans' 90% tax rate

The moment zombies are added to the mix, a dry public policy problem suddenly becomes a game of sorts, accessible to ordinary citizens.

WSJ: Why Zombies Are Everywhere

Despite all this, obesity has proved a thorny policy problem.

ECONOMIST: Lexington