Study on the Processing Technology of Calamine Calcination by Near-Infrared Spectroscopy

Table 4

NIR models for predicting characteristic T value of XRD pattern.

Model	Spectral band (cm^−1)	Pretreatment	Internal cross-validation			External validation			Rank
			R^2 (%)	RMSECV (%)	RPD	R^2 (%)	RMSEP (%)	RPD
1	7436.6–5778, 4601.6–3999.9	SNV	96.01	0.0721	5.01	94.95	0.0829	4.64	10
2	5446.3–3999.9	MSC	94.53	0.0844	4.28	90.26	0.1150	3.51	9
3	7436.6–5778, 5446.3–3999.9	SNV	94.49	0.0848	4.26	95.15	0.0813	5.23	9
4	7436.6–6607.3, 4601.6–3999.9	SNV	93.44	0.0924	3.91	92.36	0.1020	3.9	8
5	6607.3–5778, 4601.6–4300.7	SNV	93.35	0.0931	3.88	93.12	0.0968	3.96	6
6	5446.3–3999.9	SNV	93.28	0.0936	3.89	90.83	0.1120	3.62	9