main component method的用法和样例：
例句
- The karst area in Guizhou Province was classified into five eco-economic categories by the principal component analysis and fuzzy poly-class method.
摘要运用主成分分析法和聚类分析法，对贵州喀斯特地区的生态经济类型进行了划分。 - 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。
