principal components an alysis 基本例句 主成分分析 KPCA extracting principal component with nonlinear method is an improved conventional PCA.摘要核主成分分析方法是主成分分析的改进算法,其采用非线性方法提取主成分。 By using principal component analysis, turfs insect communities can be divided into three types.经主成分分析,草坪昆虫群落可以分为三个类型。