Simultaneous Recognition of Species, Quality Grades, and Multivariate Calibration of Antioxidant Activities for 12 Famous Green Teas Using Mid- and Near-Infrared Spectroscopy Coupled with Chemometrics

Figure 5

Sample weights after a 70-cycle PSO search for the (a) DPPH scavenging activity characterized by MIR, (b) ABTS scavenging activity characterized by MIR, (c) DPPH scavenging activity characterized by NIR, (d) ABTS scavenging activity characterized by NIR, (e) DPPH scavenging activity characterized by fusion of MIR and NIR, (f) ABTS scavenging activity characterized by fusion of MIR and NIR using OSWLS-SVM.

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