A kernel keyset is a representation of a collection of kernel keys and the desired read or write access to them.

内核键集是内核键集合，以及对它们进行读写所需的权限的表示形式。

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Actually the kernel design in the recognition method based on discrete time - frequency representation is a problem of feature selection from the ambiguity functions to reduce feature dimension.

基于离散时频分布的信号识别方法，将时频核设计问题转化为以信号自模糊函数为原始特征的特征选择问题，以实现特征降维和信号识别。

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