\begin{figure}[!htbp]
	\centering
	\includegraphics[width=4.0in]{name.pdf}
	\caption{Descriptions of the picture}
	\label{label of the picture}
\end{figure}

\begin{table}[!htbp]
	\caption{Descriptions of the table}
	\centering
	\begin{tabular}{l l l l}
		\hline
		A  & B & C & D \\
		\hline
		x & y & z & a \\
		\hline
	\end{tabular} \label{label of the table}
\end{table}

\begin{equation} \label{label of the equation}
content of the equation
\end{equation}