TABLE 7.

Error estimation of the response surface model.

Response	$\mathit{R}\mathit{E}$	$\mathit{M}\mathit{E}$	$\mathit{R}\mathit{M}\mathit{S}\mathit{E}$	${\mathit{R}}^2$
$WIC$	1.58959E-14	4.73414E-14	1.93778E-14	0.9982
$Nij$	1.02088E-14	2.74912E-14	1.22938E-14	0.9923