切片运算符也可以用于选取某一区间的元素。

And the slice operator selects a range of elements.

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将优化得到的复合特片作为故障识别的分类器，并根据不同的检测环境，选取不同的终端符集，从而降低检测环境对诊断结果的影响。

Then the optimal compound feature is searched by GP in the statistics and operators library. The compound feature is taken as classifier of fault diagnosis.

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