图片并排
使用floatrow包
\usepackage[captionskip=0.5cm]{floatrow}
\newfloatcommand{capbtabbox}{table}[][\FBwidth]
\begin{figure}
\begin{floatrow}
\ffigbox[\FBwidth]
{\includegraphics[width=1\linewidth]{figs/fig1.jpg}}
{\caption{caption1\label{label1}}
\ffigbox[\Xhsize]
{\includegraphics[width=1\linewidth]{figs/fig3.jpg}}
{\caption{caption2}\label{label2}}
\end{floatrow}
\end{figure}