\begin{figure}\centering\subfigure[]{\begin{minipage}[b]{0.062\textwidth}\includegraphics[width=1\textwidth]{ u16.eps} \\includegraphics[width=1\textwidth]{p-16l.eps} \\includegraphics[width=1\textwidth]{ r-16l.eps}\end{minipage}}\subfigure[]{\begin{minipage}[b]{0.062\textwidth}\includegraphics[width=1\textwidth]{ u32.eps} \\includegraphics[width=1\textwidth]{p-32l.eps} \\includegraphics[width=1\textwidth]{ r-32l.eps}\end{minipage}}\subfigure[]{\begin{minipage}[b]{0.062\textwidth}\includegraphics[width=1\textwidth]{ u64.eps} \\includegraphics[width=1\textwidth]{p-64l.eps} \\includegraphics[width=1\textwidth]{ r-64l.eps}\end{minipage}}\subfigure[]{\begin{minipage}[b]{0.062\textwidth}\includegraphics[width=1\textwidth]{ u96.eps} \\includegraphics[width=1\textwidth]{p-96l.eps} \\includegraphics[width=1\textwidth]{ r-96l.eps}\end{minipage}}\subfigure[]{\begin{minipage}[b]{0.062\textwidth}\includegraphics[width=1\textwidth]{ U128.eps} \\includegraphics[width=1\textwidth]{p-128l.eps} \\includegraphics[width=1\textwidth]{r-128l.eps}\end{minipage}}\subfigure[]{ \begin{minipage}[b]{0.062\textwidth}\includegraphics[width=1\textwidth]{u200.eps} \\includegraphics[width =1\textwidth]{p-200l.eps} \\includegraphics[width=1\textwidth]{r-200l.eps} \end{minipage}}\end{ Figure
Reference
[1].http://blog.sciencenet.cn/blog-561346-747243.html
Minipage Multi-column sub-plot and parallel typesetting