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。

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This paper presents a conception of software fault diagnosis based on the issue of software maintenance, and puts forward a new method of fault diagnosis matches arithmetic.

针对软件纠错性维护问题，提出了软件故障诊断的概念及一种故障模块匹配算法。

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The theory of fuzzy set is applied to discuss the fuzzy fault tree analysis and its application based on triangular fuzzy number arithmetic operations.

应用模糊集合理论，讨论了基于三角模糊数算术运算的事故树分析方法。

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