Research Article
A New Plant Indicator (Artemisia lavandulaefolia DC.) of Mercury in Soil Developed by Fourier-Transform Near-Infrared Spectroscopy Coupled with Least Squares Support Vector Machine
Figure 3
Optimization of LS-SVM model parameters (group A, 1–40; group B, 41–80). (a) Smoothing. (b) D2. (c) SNV.