然后采用加权平均粗糙度的概念，作为选择分离属性的标准，构造电网故障决策树，从而实现对电网的故障诊断。

Then the decision tree of electric power grid diagnosis is built by using weighted mean roughness as separating attributes standard to realize electric power grid fault diagnosis.

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用决策树知识作为有关案例知识的索引对案例进行触发，对二者得到的诊断结论进行综合后输出。

Cases are triggered by the index which is gotten from knowledge represented by decision trees and diagnostic conclusions derived from the two approaches are output by synthesize.

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因此，决策树是一种简便可行的计算机辅助诊断方法。

Therefore, the decision tree method is a simple and useful tool for computer-aided diagnosis.

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