TABLE 2.

BP neural parameters with output variable O₂ depletion.

Input variables	Time, temperatures (°C)	Time, organic: aqueous phase ratio	Time, PPOW content (v/v) in the second phase
Hidden layer(s)	1	1	1
Weights(w)	$w_1=\left[\begin{array}{cc}-0.9324& 1.2334\\ -0.6326& -1.2459\\ -1.9805& 1.5764\end{array}\right]$ $w_2={\left[\begin{array}{c}-0.8029\\ -0.7036\\ -0.4302\end{array}\right]}^{\mathrm{T}}$	$w_1=\left[\begin{array}{cc}0.8707& -0.3224\\ 0.7219& 2.8714\end{array}\right]$ $w_2={\left[\begin{array}{c}1.0964\\ 0.3264\end{array}\right]}^{\mathrm{T}}$	$w_1=\left[\begin{array}{cc}2.4668& -2.0015\\ 1.4439& -1.8794\\ 2.2218& 1.3387\end{array}\right]$ $w_2={\left[\begin{array}{c}0.0785\\ 0.8277\\ 0.9288\end{array}\right]}^{\mathrm{T}}$
Bias(b)	$b_1=\left[\begin{array}{c}0.1060\\ -0.9516\\ -3.2437\end{array}\right]$ $b_1=-0.8936$	$b_1=\left[\begin{array}{c}0.0665\\ 2.4206\end{array}\right]$ $b_1=-0.3557$	$b_1=\left[\begin{array}{c}-1.1562\\ 0.6093\\ 2.5823\end{array}\right]$ $b_1=-0.7915$
MSE	2.06  10–3	2.86  10–3	1.23  10–3
R 2	0.9903	0.9895	0.9952