传统的故障诊断专家系统大多是基于知识的故障诊断系统，有一定的局限性。
Traditional fault diagnosis expert system that is mostly based on knowledge has some limitation.
本文研究了基于知识的电子设备故障诊断的一些新方法。
Some new method of electronic equipment fault diagnosis based knowledge is studied in this paper.
提出一种基于粗糙集理论的大型旋转机械故障诊断和知识获取模型。
A model of the fault diagnosis and decision rules acquisition for large rotating machinery based on Rough set is put forward.
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