Table 4.

ELM modeling results based on different preprocesses.

Preprocessing Methods	The Optimal Number of Neurons	Rc	RMSEc	Rp	RMSEp	RPD
X	34	0.87	0.4	0.87	0.4	1.9
SG	38	0.90	0.3	0.87	0.5	1.5
MSC	48	0.94	0.25	0.87	0.4	2.0
SNV	36	0.94	0.3	0.89	0.4	2.0
1D	38	0.92	0.3	0.89	0.3	2.2
1D + SG	37	0.89	0.3	0.89	0.3	2.2
1D + MSC	34	0.91	0.3	0.89	0.3	2.2
1D + SNV	37	0.94	0.24	0.91	0.3	2.5