Table 7. Comparison of the New Model with Other Models.

models	AARD (%)	SD	RMSE	R2
Roberts model	64.36	0.86	0.67	0.6792
Guo–Wang model	12.84	0.15	0.17	0.9833
Hu model	17.32	0.22	0.21	0.9731
Chen model	4.15	0.06	0.032	0.9968
Amar model	3.51	0.07	0.023	0.9981
Bian model	3.50	0.07	0.024	0.9976
WOA-WLSSVM	3.45	0.07	0.021	0.9987
GWO-WLSSVM	3.47	0.07	0.022	0.9983