This article proposes a usage of rough collection theory by optimizing the BP nerve network model method, and will apply the optimized network model in the rolling bearing breakdown diagnosis.
提出了使用粗糙集理论优化BP神经网络模型方法，并将优化后的网络模型应用于滚动轴承的故障诊断中。
Based on fault diagnosis theory, network theory, matrix theory and computer arithmetic, a method of optimized erosion diagnosis for medium or large-scale grounding grid is discussed in this paper.
本文所研究的中大型接地网腐蚀优化诊断方法是将故障诊断学原理、网络理论、矩阵理论及计算机算法结合起来，应用于接地网腐蚀诊断这一工程实际问题。
According to theory of optimized design, a practicable method on optimized design of circuit is proposed and can improve efficiency of optimized design.
根据优化设计理论，提出一种电路优化设计的实用方法，可以提高优化设计的效率。
The structure of the lid is designed according to the wave penetrating theory and is optimized by using finite element method.
结构设计依据电磁透波原理，并应用有限元进行结构优化。
The structure of the lid is designed according to the wave penetrating theory and is optimized by using finite element method.
结构设计依据电磁透波原理，并应用有限元进行结构优化。
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