A Sequential Optimization Sampling Method for Metamodels with Radial Basis Functions

Table 4

Metamodel accuracy results for functions 1–6 between SOSM and one-stage sampling methods.

Number	SOSM			LHD			RND			𝑓min
	RMSE	NRMSE	𝑓min	RMSE	NRMSE	𝑓min	RMSE	NRMSE	𝑓min
1	0.663	28.214	−10.002	0.722	30.698	−9.137	0.817	34.766	−8.728	−10
2	0.061	9.798	−1.715	0.090	14.524	−1.611	0.122	19.659	−1.662	−1.715
3	1.674	6.464	−0.002	1.790	6.913	0.140	2.072	8.001	0.040	0
4	0.728	38.118	−6.556	0.810	42.456	−5.786	0.861	45.116	−5.374	−6.551
5	2.455	10.531	−34.243	3.353	14.380	−12.928	3.789	16.253	−9.907	−34.63
6	0.995	10.011	0.116	0.992	9.991	2.284	1.076	10.830	2.070	0