基于核的主成分分析是一种非线性特征提取方法,它通过一个非线性映射将数据从输入空间映射到特征空间,然后在特征空间中进行通常的主成分分析,其中的内积运算采用一个核函数来代替-Core-based principal component analysis is a nonlinear feature extraction method, which maps data　the input space to the feature space through a nonlinear mapping, and then carries out the usual principal component analysis in the feature space. The inner product calculation uses a Nuclear function instead