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中文摘要：
水库分期汛限水位控制能在不增加防洪风险的条件下提高水库的兴利效益,而汛期的分期则是分期汛限水位控制的前提.介绍了集对分析理论及联系数的计算方法,以三峡水库宜昌站为例,利用统计学方法确定了洪水分期数目,并计算了汛期每一天的联系度和联系数,从而最终确定三峡水库的汛期分期.分期结果比较后表明,用集对分析方法得到的三峡水库汛期分期和其他方法的分期结果基本一致,但集对分析法原理易于理解,计算过程客观,实际使用方便,说明集对分析理论在汛期分期中的应用是可行的,值得进一步深入研究.
英文摘要：
Controlling the limited water level of reservoir by stage can have more economical benefits with no addition of risk in flood control,and the partition of stages in flood season is the precondition of controlling the limited water level by stage.The set pair analysis theory and the computation of connection number are introduced by taking the Yichang gauging station of Three Gorges Reservoir for example and by using the traditional statistics method.It is revealed that the periods of Three Georges Reservoir determined by using set pair analysis theory are consistent with that from other methods;but the method using set pair analysis theory is much more objective;and it is feasible and needs to be further discussed and applied.
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