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中文摘要：
为了克服一般模糊粗糙集模型中的所有模糊知识能够构成论域的弱模糊划分的不确定性,故对模糊粗糙集模型进行扩展研究.因此,构造出一种优化模糊粗糙集模型,该模型通过利用决策模糊事件F与条件模糊事件Φ的关联强度,找到模糊集的上、下近似算子,使对象可能属于模糊集与必然属于模糊集的程度达到最小,表达一种最优逼近.
英文摘要：
Since all of the fuzzy knowledge in the general fuzzy rough set models can result in uncertainty of the weak fuzzy partitions of the universe of a fuzzy set,a further extended study is done to find out more about the fuzzy rough sets.A new optimized fuzzy rough set model is constructed by use of the relationship intensity between the decision-making fuzzy event Fand fuzzy conditional eventΦ.then the upper and lower approximate operator of the fuzzy set are determined so that the possibility degree and the inevitability degree of an object belonging to a fuzzy set is maximal and the expression is the optimal approximation
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