主成分分析方法能够克服一些其他分析方法的缺点，减少主观的因素，使分析结果能够客观地反应事实。

Principal component analytical method can get rid of disadvantages of other methods, reduce subjective factors and make analytical result reflect facts objectively.

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本文详细阐述了这一励磁方式的优点和缺点，讨论了自并励励磁系统设计中主回路、起磁回路、灭磁回路的有关问题。

This thesis sets forth the merit and flaw of excitation system and other concerned problems of main loop, magnetizing field loop and de-excitation loop in detail.

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引入了主成分分析与偏最小二乘回归等多元统计与回归方法，并分析了其基本思想与优缺点。

Then the basic concepts of principal component analysis and partial least square regression are studied, as well as their advantages and disadvantages.

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