本文介绍了常用的几种谐波和无功电流检测方法，并进行了比较。
Several methods of measuring harmonic and reactive power current are introduced and compared in this paper.
在固定支持度阈值设置基础上，讨论了可变支持度设置的方法，并进行了比较分析。
At the basis of setting up the fixed threshold about support, discuss the methods of setting up the variable support and comparatively analyze them.
对现有的一些腐蚀剩余寿命预测方法进行分析比较，并进行了分类总结。
The existing methods of corrosion residual life prediction were analyzed and compared, then were classified.
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