Minimize	$f\left(\overrightarrow{x}\right)=1.10471x_1^2{x}_2+(4.811\times {10}^{-2})\times x_3{x}_4(14+x_2),$
Subject to:	$\left\{\begin{array}{c}\begin{array}{c}{g}_1\left(\overrightarrow{x}\right)=\tau \left(x\right)-{\tau }_{max}\le 0\\ \begin{array}{c}{g}_2\left(\overrightarrow{x}\right)=\sigma \left(x\right)-{\sigma }_{max}\le 0\\ g_3\left(\overrightarrow{x}\right)=\delta \left(x\right)-{\delta }_{max}\le 0\end{array}\end{array}\\ \begin{array}{c}\begin{array}{c}{g}_4\left(\overrightarrow{x}\right)=x_1-x_4\le 0\\ g_5\left(\overrightarrow{x}\right)=P-P_c\left(x\right)\le 0\end{array}\\ \begin{array}{c}{g}_6\left(\overrightarrow{x}\right)=0.125-x_1\le 0\\ g_7\left(\overrightarrow{x}\right)={1.10471x}_1^2+(4.811\times {10}^{-2}){\times x}_3{x}_4(14+x_2)-5\le 0\end{array}\end{array}\end{array}\right.$	(26)
Variable range:	$\left\{\begin{array}{c}\begin{array}{c}0.1\le x_1\le 2.0\\ 0.1\le x_2\le 10\end{array}\\ \begin{array}{c}0.1\le x_3\le 10\\ 0.1\le x_4\le 2.0\end{array}\end{array}\right.,$