Novel Two-Stage Method for Low-Order Polynomial Model

Table 3

Mean and COV values of of traditional models (1RS and 2RS) and their corresponding improved models (1IRS and 2IRS) over the 1000 test sets for nine benchmark problems.

	1RS	1IRS	2RS	2IRS
GP-2	1.162E+05(0.086)	8.271E+04(0.177)	8.180E+04(0.160)	7.172E+04(0.225)
BH-2	6.611E+01(0.066)	6.352E+01(0.147)	5.862E+01(0.114)	5.106E+01(0.265)
PM-3	1.576E+01(0.060)	7.883E+00(0.416)	6.086E+00(0.118)	5.056E+00(0.175)
CP-3	4.097E+01(0.058)	7.056E+00(0.138)	7.322E+00(0.148)	1.113E+00(0.613)
PS-4	4.986E+04(0.056)	4.158E+04(0.075)	2.876E+04(0.106)	2.527E+04(0.123)
HM-4	8.414E-01(0.033)	8.479E-01(0.133)	6.623E-01(0.091)	6.484E-01(0.123)
ZH-10	1.048E+08(0.091)	5.103E+07(0.128)	5.655E+07(0.128)	2.022E+07(0.166)
DP-15	3.838E+05(0.022)	3.849E+05(0.025)	1.363E+05(0.035)	1.373E+05(0.035)
WE-20	1.365E+00(0.022)	1.297E+00(0.024)	9.506E-01(0.026)	9.505E-01(0.026)