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

Table 5

The predictions of ABTS scavenging activities by OSWLS-SVM.

Prediction samples	Actual ABTS radical scavenging activity (TEAC)			Recoveries (%)
	MIR	NIR	Fusion data	MIR	NIR	Fusion data
1	4.44	4.44	4.44	97.4	99.4	100.0
2	4.46	4.44	4.44	100.0	99.8	100.0
3	4.44	4.46	4.43	96.1	100.5	100.4
4	4.46	4.44	4.44	98.2	99.6	100.7
5	4.11	4.44	4.11	100.5	99.2	100.2
6	4.11	4.46	4.11	100.0	99.5	100.0
7	4.12	4.11	4.14	100.0	100.7	100.0
8	4.14	4.14	4.14	100.0	99.8	99.3
9	4.11	4.11	4.11	100.5	99.8	100.3
10	4.12	4.11	4.12	100.2	99.4	100.0
11	4.14	4.03	4.14	100.0	100.2	100.0
12	4.04	4.04	4.04	100.0	99.7	100.0
13	4.04	4.04	4.04	100.0	100.3	100.1
14	4.04	4.04	4.04	100.0	99.7	100.2
15	4.04	4.04	4.04	97.8	97.0	100.0
16	4.21	4.21	4.21	100.1	101.2	100.3
17	4.22	4.22	4.22	100.0	100.0	100.0
18	4.23	4.23	4.23	99.8	100.4	99.9
19	4.22	4.22	4.22	100.2	100.4	100.1
20	4.23	4.23	4.23	99.5	98.8	100.0
21	4.33	4.33	4.33	100.0	101.8	100.3
22	4.35	4.35	4.35	99.7	100.7	99.9
23	4.36	4.33	4.36	99.5	100.4	100.0
24	4.33	4.35	4.33	100.0	99.2	100.0
25	4.36	4.36	4.36	100.0	100.5	100.0
26	4.27	4.28	4.27	100.4	100.4	100.0
27	4.28	4.29	4.28	100.0	99.8	98.4
28	4.30	4.30	4.30	100.0	99.4	100.0
29	4.27	4.27	4.27	100.0	100.3	100.0
30	4.29	4.27	4.29	99.8	100.4	99.7
Correlation coefficient				1.0000	0.9990	1.0000
Regression equation				y = 1.0000x + 3.6935 × 10^−6	y = 0.9860x + 0.0565	y = 1.0000x + 2.7420 × 10^−6
Average recoveries (%)				99.7 ± 1.0	99.9 ± 0.8	100.0 ± 0.4
RMSEC^a				1.1315 × 10^−6	0.0394	7.6170 × 10^−7
RMSEP^b				0.0447	0.0347	0.0155
T(t-test) = 2.045				0.4615 <	0.0634 <	0.0054 <

^aRMSEC denotes calibration root-mean-squared error; ^bRMSEP denotes prediction root-mean-squared error.