Table 5.

Basic RVM model hyperparameters configured with a k-fold value of 5.

Hyperparameters	SRVM model	DRVM model
Parameter settings
Kernel functions	Linear, Polynomial, Gaussian	and Laplacian
Maximum iterations	1000	1000
Number of kernels	Single	Two
Free basis	Enable	Enable
Optimizer settings
Methods	GA and PSO	GA and PSO
Target	Single kernel	Dual kernel
Lb	2–6	$2^{-5},{10}^{-2},{10}^{-3},{10}^{-3}$
uB	2–6	$2^{-5},{10}^0,{10}^3,{10}^3$
Num. variable	1	4
Maximum iterations	100	100
k-folds	5	5