A new method for reliability analysis and calculation of the gray maintainable system is put forward using the gray theory under the condition of lacking information from its practical state.
从灰色可维修系统实际工作状态出发，在缺乏信息的条件下，运用灰色理论，提出其可靠性的分析计算新方法。
For the effect of natural condition and many other factors, the utilization of water resources is very low and the problem of lacking water is serious in Dalian area.
大连地区受自然条件及多方面因素影响，水资源利用率较低，缺水问题严重。
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