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中文摘要：
集对分析是一种新的处理模糊和不确定问题的系统理论方法,运用同异反表达式可解决各种模糊不确定问题,而五元联系数又是集对分析理论的拓展.针对当前众多湖泊富营养化评价方法过程复杂繁琐问题,提出利用基于五元联系数的系统态势对湖泊富营养化程度进行等级评价,其评价结果与其他评价方法基本一致;并且用集对分析法对湖泊富营养化程度进行等级评价,评价结果更符合实际情况,对监测数据的利用率高,对营养化程度的划分更细致,能够得到属于同一级别的湖泊富营养化程度的排序.五元联系数克服了以往集对分析评价级别只有3个等级的缺点,扩大了评价等级范围,因此可在更多领域得到广泛应用.
英文摘要：
Set Pair Analysis （SPA） is emerging as a new system theory method for dealing with vagueness and uncertainty of facts. Many problems of uncertainty of fuzziness can be solved with the application of same-indefinite-contrary expression, and five element connection number is an extension of SPA. Aiming at the problem being too complex for the present evaluation methods on lake eutrophication, an assessment of lake eutrophication based on situation of five-element connection number was suggested, The results of the assessment are basically in concordance with other evaluation methods. The assessment result of this method accords with actual situation more accurately, the utilization efficiency of monitoring data is high and division of nutritious levels is more accurate. It can get a sorting of the same grade lake eutrophication. Five-element connection number conquers the disadvantages that other SPA only has three grades, and enlarges the range of evaluation grade. So, five-element connection number can be used in more fields.
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