例句與造句

1. In this thesis , based on principal component analysis ( pca ) , covariance stationary processes and spectral analysis theory of linear operator , spectral principal component analysis ( spca ) is put forward
   在主成分分析的基礎(chǔ)上，基于協(xié)方差平穩(wěn)過程理論和線性算子譜分析理論，本文提出了譜主成分分析。
2. It's difficult to find theory of linear operators in a sentence. 用theory of linear operators造句挺難的