main component method的用法和樣例：
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.
摘要運用主成分分析法和聚類分析法，對貴州喀斯特地區的生態經濟類型進行了劃分。 - 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進演算法，其採用非線性方法提取主成分。
