针对变压器故障诊断中的不足，介绍了模糊聚类分析的理论、方法及聚类效果的判别原则。
For the deficiency of fault diagnosis of power transformer, fuzzy set analysis theory and method are described and applied to the diagnosis of power transformer.
由于影响砂土液化的因素太多，而且许多的判别条件不容易获取，应用模糊理论判别砂土液化是比较合理的方法。
Because there are many impact factors, and some judgment conditions are not easy to obtain, the application of Fuzzy theory to distinguish sandy soil liquefaction is a fairly reasonable approach.
本文应用非参数统计理论，提出了一种新的分类判别方法，用于测井解释中的岩性划分。
A new recognition method based on the theory of non-parameter statistics is used to lithology identification in log interpretation.
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