Table 1.

Results for the SVR, Tf model and NNs, parallel form GE

	MSE (−)		Fit (%)
	Training set	Test set	Training set	Test set
SVR: C = 100 γ = 2.79 × 10−2	4.6 × 10−4	9.1 × 10−4	90.93	86.96
Tf of PID	–	1.5 × 10−3	–	83.52
NNa 14-5-1	1.2 × 10−3	2.9 × 10−3	84.89	80.14

^aWhere NN 14-5-1 means: 14 is the number of inputs; five is the number of hidden neurons; one is the number of outputs