本文就情报检索语言中存在的模糊不确定现象，用模糊数学的理论给出三个模糊数学描述。
This article, using the theory of fuzzy mathematics, gives three fuzzy - mathematics models to describe the confused, uncertained phenomena in the information - searching language.
在使用内部收益率方法进行工程项目的论证和此较时，由于方法内在原因，可能发生不确定现象。
When assessing or comparing engineering projects with the method of internal profit rate, ambiguous answers might take place because of the internal reasons of the method.
改进与推广了模糊信息的熵度量方法，探讨了用信息熵理论来研究既含有模糊性又含有随机性的不确定现象，从而得到了混合熵。
The paper also extends the method of fuzzy information measured by entropy, explores a uncertainty phenomenon including random as well as fuzzy, which infers compound entropy.
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