Then BP neural network is trained by use of the unified sample groups and used to analog fault diagnosis at sub-network-level.

然后利用统一样本集训练BP神经网络，并将神经网络用于子网络级模拟故障诊断。

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In this paper, a module level diagnostic method is presented which considers multi-port device or sub-network as the basic unit.

本文以多端口元件或子网络为基本单元，提出了一种模块级故障诊断方案。

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