Present methods of analysis and design of DESS focus on their behavior in the steady state, a conceptualization that requires performance measures to be made "in the long run" or averaged over time.
现代离散事件随机系统的分析和设计方法集中在它们在稳定状态下的行为上，在长期的运转或超过平均时间的运作中一个需要绩效测量的概念形成了。
This paper describes first the present state of water-borne measures in our country, and points out the importance its meaning.
本文陈述了水上安全保障设施建设的重要意义及我国水上安全保障设施的现状。
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