如何在 Elsevier 类中的关键词部分后添加额外的一行

Question

在使用 Elsevier 类时，我想插入一行

DOI: 10.xxxxx/blah

紧接着关键词部分。

我所做的就是在块后面输入此行\begin{keyword} ... \end{keyword}作为标准（常规）文本。但是我想要插入的字符串（例如DOI: 10.xxxxx/blah）并没有按预期出现在关键字部分之后，而是单独出现在第一页中。

请帮我解决这个问题。非常感谢。

Answer 1

您可以使用以下想法https://tex.stackexchange.com/a/154216/4427

\documentclass[preprint, authoryear]{elsarticle}

\usepackage{etoolbox}

\makeatletter
% patch \maketitle to accommodate the new information before the first rule
\patchcmd{\pprintMaketitle}
  {\vskip36pt}
  {\ifvoid\extrainfobox
     \vskip36pt
   \else
     \vskip10pt\unvbox\extrainfobox\par\vspace{10pt}%
   \fi\relax
  }
  {}{}
% patch \maketitle to accommodate the DOI after the keywords
\patchcmd{\pprintMaketitle}
  {\fi\hrule}% the second rule
  {\fi
   \ifx\@DOI\@empty
   \else
     {\normalfont\normalsize\@DOI}\hspace*{\fill}\par\vspace{10pt}%
   \fi\hrule
  }
  {}{}

% an environment for the new information
\newenvironment{extrainfo}
  {\global\setbox\extrainfobox=\vbox\bgroup\parindent=0pt }
  {\egroup}
\newsavebox\extrainfobox

% The DOI
\newcommand{\DOI}[1]{%
  \gdef\@DOI{DOI: #1}%
}
\let\@DOI\@empty % initialize
\makeatother

\bibliographystyle{annesstyle}

\begin{document}

\begin{frontmatter}

\title{title}
\author[firstaddress]{Aaddress}
\author[secondaddress]{address}
\author[thirdaddress]{Haddress}
\author[thirdaddress]{address}
\author[thirdaddress]{address}
\author[thirdaddress,firstaddress]{address}

\address{Address for correspondance:}

\address[firstaddress]{address}
\address[secondaddress]{address}

\begin{abstract}abstract\end{abstract}

\begin{keyword}keywords\end{keyword}

\DOI{10.xxxxx/blah}

\begin{extrainfo}
\begin{center}
\textbf{Article history}

blah blah
\end{center}
\end{extrainfo}

\end{frontmatter}

\section{References}
\bibliography{mybib}
\end{document}