这样，在模糊数学中有三类测度：可能性测度、必要性测度、可信性测度。

Thus, there are three kinds of measure in fuzzy mathematics: possibility measure, necessity measure, credibility measure.

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然而，事实并非如此，在模糊集合论中正是可信性测度才扮演了概率测度的角色。

However, it is the credibility measure which plays the role of probability measure in fuzzy set theory actually.

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第五章是对本文内容的总结及基于可信性分布的模糊熵问题的研究展望。

Chapter 5 gives a summary of this paper and shows the prospects in the further study of fuzzy entropy based on credibility distributions.

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