\documentclass[]{jsbook}
\usepackage{psfrag,graphicx,color,defvar2,eclepsf,othermac}
\pagestyle{empty}
\begin{document}
\begin{minipage}{0.45\textwidth}
\centering
\epsfile[
\epsfat(-5mm,40mm){\parbox{2em}{\centering $V_{vm1}$\\ (p.u.)}}
\epsfat(53mm,-6mm){$\Pe_1$ (p.u.)}
]{file=eps-mg/090-Tv400-long.eps,width=0.95\columnwidth} %hrate=1

\bigskip

(a) $B%"%H%i%/%?(B
\end{minipage}
%
\hspace{3zw}
%
\begin{minipage}{0.45\textwidth}
\centering
\epsfile[
\epsfat(-22mm,41mm){\parbox{5em}{\centering$\Pe_1(n+1)$}}
\epsfat(55mm,-8mm){$\Pe_1(n)$}
]{file=eps-mg/090-Tv400-long-ret.eps,width=0.95\columnwidth} %hrate=1

\bigskip

(b) $B%j%?!<%s%^%C%W(B
\end{minipage}


\bigskip
\bigskip

%\end{figure}
%
%
%\begin{figure}[]

\begin{minipage}{0.45\textwidth}
\centering
\epsfile[
\epsfat(-5mm,40mm){\parbox{2em}{\centering $V_{vm2}$\\ (p.u.)}}
\epsfat(53mm,-6mm){$\Pe_2$ (p.u.)}
]{file=eps-mg/090-Tv400-siml.eps,width=0.955\columnwidth} %hrate=1

\bigskip

(a) $B%"%H%i%/%?(B
\end{minipage}
%
\hspace{3zw}
%
\begin{minipage}{0.45\textwidth}
\centering
\epsfile[
\epsfat(-22mm,41mm){\parbox{5em}{\centering$\Pe_2(n+1)$}}
\epsfat(55mm,-8mm){$\Pe_2(n)$}
]{file=eps-mg/090-Tv400-siml-ret.eps,width=0.95\columnwidth} %hrate=1

\bigskip

(b) $B%j%?!<%s%^%C%W(B
\end{minipage}

\end{document}
