传统方法用主成分分析、逐步回归分析和数量化理论来实现对森林立地进行分类和评价。
Traditional method analyze, return to with main composition analysis with quantity theory come, realize, set up to forest type go on, divide and appraise progressively.
利用主成分和逐步回归分析了影响土壤重金属的有效性及其微生物学效应的因素。
Principal component analysis and stepwise regression were employed to characterize availability of heavy metals, microbial responses and their effect factors in the studied soil.
基于逐步回归分析与主成分分析，提出了用于中药质量预测的软测量方法。
Based on the stepwise regression analysis and the principal component analysis, the soft-sensing method is presented to predict the quality of Chinese herb.
然后分别运用灰度关联、逐步回归分析、主成分方法选取主要影响因素；
By using the methods of grey relational analysis, stepwise regression analysis and key part analysis the key factors are fownd.
然后分别运用灰度关联、逐步回归分析、主成分方法选取主要影响因素；
By using the methods of grey relational analysis, stepwise regression analysis and key part analysis the key factors are fownd.
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