详细介绍了主元分析方法、其存在的缺点及相应的改善方法。
Principal Component Analysis (PCA) is studied and some modifications are discussed to improve the performance of PCA.
对于连续生产过程，可以采用普通的主元分析方法进行过程数据分析；
For continuous process, the normal PCA can be used to analyze the process data.
根据现实过程测量数据的时序相关特点，提出了一种动态主元分析方法；
To meet the needs of timely responses of process parameter measurements on paper machine operations, an analytical method based on the major dynamic components is applied on a paper process model.
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