latex 论文致谢

1. 

To add a non numbered section you just use

\section*{Acknowledgement}

If you want to insert this section on the table of contents, use

\addcontentsline{toc}{section}{Acknowledgement}

after the first command.

2. 自定义环境

\documentclass{report}
\usepackage{lipsum}% just to automatically generate text

\makeatletter
\newcommand\ackname{Acknowledgements}
\if@titlepage
  \newenvironment{acknowledgements}{%
      \titlepage
      \null\vfil
      \@beginparpenalty\@lowpenalty
      \begin{center}%
        \bfseries \ackname
        \@endparpenalty\@M
      \end{center}}%
     {\par\vfil\null\endtitlepage}
\else
  \newenvironment{acknowledgements}{%
      \if@twocolumn
        \section*{\abstractname}%
      \else
        \small
        \begin{center}%
          {\bfseries \ackname\vspace{-.5em}\vspace{\z@}}%
        \end{center}%
        \quotation
      \fi}
      {\if@twocolumn\else\endquotation\fi}
\fi
\makeatother

\begin{document}

\begin{abstract}
  \lipsum[1]
\end{abstract}

\begin{acknowledgements}
  \lipsum[1]
\end{acknowledgements}

\end{document}