Comparison of three regression analysis methods for application to LAI inversion using Hyperion data Analysis the relationship between ecological footprint (EF) of ningxia and influencing factors: Partial Least-Squares Regression (PLS) Optimization for compatibility of Ramulus Uncariae cum Uncie total alkaloids and Semen Raphani total alkaloids based on partial least-squares regression analysis Correlation between ginsenoside contents in Panax ginseng roots and ecological factors, and ecological division of ginseng plantation in China Analysis of Tuber Characters Impact on Potato Tuber Bruises Analysis of Tuber Characters Impact on Potato Tuber Bruises