Table 4. The optimal robust solution obtained under different G.

Parameters		ESOA solution			WOA solution			DBO solution
λ	G	m	s	r	m	s	r	m	s	r
10	55	13.8169	1.2405	0.439986	13.8417	1.2391	0.440028	13.6891	1.2479	0.440086
10	60	13.3167	1.1779	0.330009	13.1684	1.1873	0.330019	13.2120	1.1846	0.330031
10	65	12.9005	1.1081	0.203472	12.8649	1.1106	0.203526	12.7987	1.1153	0.203571