First, it researches the category and design process of the fault diagnosis model based on neural network. The model includes 6 categories and 5 design processes.

首先研究了基于神经网络的故障诊断模型的分类和设计步骤，并将诊断模型大体分为6类和5个设计步骤；

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The introduction of competition pattern in the sub-population is to optimize the model, and it has used evolutionary algorithm based on population category.

对模型的优化，引入了分种群的竞争模式，采用基于种群分类的进化算法。

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"This low PEG ratio falls into the best-case category on one of my Lynch-based model's most important tests, " points out Reese.

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