Methods: to introduce the correlation principal components regression (CPCR) and compare the difference between the CPCR and top-down PCR.
方法：介绍相关主成分回归cPCR法并将该法与传统的主成分回归进行比较。
It is proved that the combining ridge and principal components regression have the minimum variance sum in the class of reduced-dimension estimators.
证明了在一类岭型降维估计中，岭型主成分估计的方差和最小。
Predictive capability between the new model (principal components ANN model) and linear regression model for the same predictors is discussed based on the independent samples and historical samples.
将这种新的预测模型（主成分神经网络预报模型）与同样根据这些预报因子建立的逐步回归预报模型进行了对比分析。
Predictive capability between the new model (principal components ANN model) and linear regression model for the same predictors is discussed based on the independent samples and historical samples.
将这种新的预测模型（主成分神经网络预报模型）与同样根据这些预报因子建立的逐步回归预报模型进行了对比分析。
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