\documentclass[]{jsbook}
\usepackage{psfrag,graphicx,color,defvar2,eclepsf,othermac}
\pagestyle{empty}
\begin{document}
\centering
\psfrag{theta (deg)}[][]{$\theta$ (deg)}
\psfrag{N(theta)}[][]{$N(\theta$)}
\psfrag{P(theta)}[][]{$P(\theta$)}
\psfrag{alpha = 90 deg}[][]{{\scriptsize $\alpha=90$ deg}}
%\includegraphics[width=0.55\figbasewidth,clip]{eps-fl/Image42.eps}
\includegraphics[width=0.8\figbasewidth,clip]{eps1/theta-membership.eps}

$B0LAj3Q(B$\theta$$B$K4X$9$k2CB.$*$h$S8:B.$N%a%s%P%7%C%W4X?t(B

\end{document}
