K-means algorithm has some deficiencies. The number K must be pointed and its effectiveness liable to be effected by isolated data and the input sequence of data.

均值算法的聚类个数k需指定，聚类结果与数据输入顺序相关，而且易受孤立点影响。

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K-fault diagnosis is an effective diagnosis method with small amount of after teat work. However, it is liable to be influenced by tolerance, especially when it is used to a practical circuit.

故障诊断法是一种计算量较少而又比较有效的诊断方法，但在实际使用中受容差影响较大。

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