\documentclass{article}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}
\begin{abstract}
\begin{center}
{\large {\bf your title here}} \\[+.1in]
{\bf your name\\[1ex]
your address \\
} \\ [+.2in]
\end{center}

\noindent
your abstract here

\end{abstract}
\end{document}