Believing degree criterion of fuzzy characteristic quantity of risk grade of system was discussed, and unreason of believing degree in property recognized theory was pointed out.

探讨了系统危险等级模糊特征量的置信度准则，指出了属性识别理论中置信度准则的不合理性。

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A solution as compensating the controlled quantity by fuzzy inference is put forward in this paper to the problem of model mismatch caused by the predictive function control.

针对预测函数控制中模型失配的影响，提出了用模糊推理对控制量进行补偿的新型预测函数控制。

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This article introduced fuzzy concept and quantity in the field of medical imaging technique. The theory of fuzzy mathematics was described and its application in image quality control Investlgatecl.

作者在医学影像技术范畴，提出模糊概念和模糊量，并简介模糊数学理论概要及其在影像质量评价中的应用。

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