According to the modified least square algorithm of system identification technique, a diagnostic model of power transformer fault is determined and described by fuzzy relation matrix.

采用系统辨识的最小二乘法的改进算法，确定了一种用模糊关系矩阵表示电力变压器故障诊断模型。

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Based on fuzzy theory, the fuzzy relation between fault signs and fault reasons is analyzed. Then a fuzzy expert system for fault diagnosis in power plant is designed.

本文以模糊理论为基础，分析了故障征兆与故障原因之间的模糊关系，设计了一个适用于火电厂故障诊断的模糊专家系统。

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The qualitative judgment system based on fuzzy control was built after analyzing the relation between quality of spot welding and the box fractal dimension of signals in spot welding.

在对焊点质量与焊接过程中信息的盒维数统计物理关系的分析基础上建立了基于模糊控制理论的焊点质量判定系统。

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