Table 8.

Optimal values and $r_y^p$ obtained through the fitted main model (iteration no. 2) for gas NO${}_2$ and gas CO.

Optimal Value	Mt1	Mt2	Mt3	Mt4	Mt5	Mt6	Mt7	Mt8
				Target gas = $N{O}_2$
Response	−19.76	−15.55	−13.29	−22.20	−18.30	−18.12	−11.67	−16.94
Working Temperature	179.90	164.99	165.00	194.97	209.90	194.60	209.90	179.90
Gas Concentration	11.09	15.83	15.83	15.83	11.09	6.33	15.83	11.09
$r_y^p$	0.59	0.35	0.06	−0.14	0.21	−0.70	0.09	0.12
				Target gas = $CO$
Response	7.33	12.44	15.86	4.22	9.29	11.52	17.49	9.56
Working Temperature	309.39	264.90	239.90	239.70	239.90	239.80	284.67	239.71
Gas Concentration	284.0	284.0	284.0	142.0	142.0	284.0	284.0	71.0
$r_y^p$	−0.11	0.07	0.42	0.13	−0.32	0.06	0.22	−0.25