As proposed by Hsu and Lin [8], for each problem, weestimate the generalized accuracy using different combinationof cost parameters C and kernel parameters g: C ¼½212; 211; . . . ; 21; 22 and g ¼ ½24; 23; . . . ; 29; 210. Therefore,for each problem we try 15 15 ¼ 225 combinationsof parameters ðC; gÞ for SVR. Average results of 50 trials ofsimulations with each combination of ðC; gÞ are obtainedand the best performance obtained by SVR are shown inthis paper as well.