\def\RCSfile{prletters}%
\def\RCSversion{0.1}%
\def\RCSdate{2013/05/13}%
\def@shortjnl{\relax}
\def@journal{Pattern Recognition Letters}
\def@company{Elsevier Ltd}
\def@issn{000-0000}
\def@shortjid{prletters}
\NeedsTeXFormat{LaTeX2e}[1995/12/01]

@ifclassloaded{elsarticle}
{\typeout{elsarticle.cls is loaded…}}
{\errmessage{This package will work only with
elsarticle.cls. So please load elsarticle.cls
and try.}}

\RequirePackage{geometry}
\geometry{twoside,
paperwidth=210mm,
paperheight=280mm,
textheight=693pt,
textwidth=522pt,
inner=15mm,
top=15mm,
headheight=50pt,
headsep=10pt,
footskip=12pt,
footnotesep=28pt plus 2pt minus 6pt,
columnsep=18pt
}
\global\let\bibfont=\footnotesize
\global\bibsep=0pt
\input{fleqn.clo}
\ifpreprint
\else
\global@twocolumntrue
\fi


\usepackage{multirow}
\usepackage{color}

\AtBeginDocument{
\def\elsarticletitlealign{flushleft}
}

%%
\def\snm#1{\textcolor{red}{#1}}

%% Title page header
\def\ps@PRlettersTitle{%
\def@oddhead{
\noindent\parbox[t]
{\textwidth}{
~\hfill\thepage\
\rule{.8\textwidth}{.2pt}\[.8ex]
\includegraphics[scale=.8]{elsevier-logo}
\hfill
\raisebox{14pt}{\parbox{.5\textwidth}%
{\centering {\large Pattern Recognition Letters}\
{\sf journal homepage: www.elsevier.com}}}
\hfill
\hspace*{.15\textwidth}\[-4pt]
\rule{\textwidth}{2pt}
}}
\let@evenhead@empty
\def@oddfoot{}
\let@evenfoot@oddfoot
}

\def\ps@headings{%
\def@oddhead{\mbox{~}\hfill\thepage}
\let@evenhead@oddhead
\let@oddfoot\relax
\let@evenfoot@oddfoot
}

% Header for other than title page.
\pagestyle{myheadings}

% History info
\let@received@empty
\let@finalform@empty
\let@accepted@empty
\let@availableonline@empty
\let@communicated@empty
\def\received#1{\gdef@received{#1}}
\def\finalform#1{\gdef@finalform{#1}}
\def\accepted#1{\gdef@accepted{#1}}
\def\availableonline#1{\gdef@availableonline{#1}}
\def\communicated#1{\gdef@communicated{#1}}

\def\receivedhead{Received}
\def\acceptedhead{Accepted}
\def\finalformhead{Received in final form}
\def\availableonlinehead{Available online}
\def\communicatedhead{Communicated by}

% Article info
\def\articleinfobox{
\parbox[t]{.25\textwidth}{%
\vspace*{0pt}%
\hrule%
\vspace*{6pt}%
\fontsize{8pt}{10pt}\selectfont%
\textit{Article history}:\
\ifx@received@empty\relax
\else
\receivedhead~@received\
\fi
\ifx@finalform@empty\relax
\else
\finalformhead~@finalform\
\fi
\ifx@accepted@empty\relax
\else
\acceptedhead~@accepted\
\fi
\ifx@availableonline@empty\relax
\else
\availableonlinehead~@availableonline
\fi
\ifx@communicated@empty\relax
\[-2pt]
\else
\par
\vspace*{10pt}
\communicatedhead~@communicated
\vspace*{12pt}
\fi
\hrule
\vspace*{1pc}
\unhbox\keybox}
}

% Preprint Maketitle
\long\def\pprintMaketitle{%
\resetTitleCounters
\def\baselinestretch{1}%
\begin{\elsarticletitlealign}%
\def\baselinestretch{1}%
\vspace*{5pc}
\Large@title\par\vskip18pt
\normalsize
\ifdoubleblind
\vspace*{2pc}
\else
\elsauthors\par\vskip10pt
{\footnotesize\itshape\elsaddress}\par\vskip12pt
\fi
\vspace*{-\baselineskip}%
\parbox[t]{\textwidth}{%
\parbox[t]{.25\textwidth}{\articleinfobox\[3pt]\hrule}\hfill%
\parbox[t]{0.7\textwidth}{\rule{.6\textwidth}{.2pt}\vskip10pt
\begin{tabular*}{.6\textwidth}{c@{}p{.9\textwidth}}
\hspace*{7pt}&ABSTRACT\[8pt]
\hline\[-8pt]
\end{tabular*}
\hspace*{13.5pt}\parbox[t]{.577\textwidth}{\unhbox\absbox}
\[3pt]\rule{.7\textwidth}{.2pt}%\vskip10pt%
}}%
\end{\elsarticletitlealign}%
%\rule{.6\textwidth}{.2pt}%\vskip10pt%
\vspace*{2pc}
\printFirstPageNotes
}


% Maketitle
\long\def\MaketitleBox{%
\resetTitleCounters
\def\baselinestretch{1}%
\begin{\elsarticletitlealign}%
\def\baselinestretch{1}%
\vspace*{7.5pc}
\Large@title\par\vskip18pt
\normalsize
\ifdoubleblind
\vspace*{2pc}
\else
\elsauthors\par\vskip10pt
{\footnotesize\itshape\elsaddress}\par\vskip12pt
\fi
\vspace*{-\baselineskip}%
\parbox[t]{\textwidth}{%
\parbox[t]{.25\textwidth}{\articleinfobox\[3pt]\hrule}\hfill%
\parbox[t]{0.7\textwidth}{\rule{.7\textwidth}{.2pt}\vskip10pt
\begin{tabular*}{.7\textwidth}{c@{}p{.7\textwidth}}
\hspace*{7pt}&ABSTRACT\[8pt]
\hline\[-8pt]
\end{tabular*}
\hspace*{13.5pt}\parbox[t]{.677\textwidth}{\unhbox\absbox}%
\[3pt]\rule{.7\textwidth}{.2pt}%\vskip10pt%
}}
\end{\elsarticletitlealign}%
\vspace*{2pc}
\printFirstPageNotes
}

\long\def\finalMaketitle{%
\resetTitleCounters
\def\baselinestretch{1}%
\MaketitleBox
\thispagestyle{PRlettersTitle}%
\gdef\thefootnote{\arabic{footnote}}%
}


\def\printFirstPageNotes{%
\def\snm##1{##1}%
\iflongmktitle
\let\columnwidth=\textwidth\fi
\ifdoubleblind
\else
\ifx@tnotes@empty\else@tnotes\fi
\ifx@nonumnotes@empty\else@nonumnotes\fi
\ifx@cornotes@empty\else@cornotes\fi
\ifx@elseads@empty\relax\else
\let\thefootnote\relax
\footnotetext{\ifnum\theead=1\relax
\textit{e-mail:\space}\else
\textit{e-mail:\space}\fi
@elseads}\fi
\ifx@elsuads@empty\relax\else
\let\thefootnote\relax
\footnotetext{\textit{URL:\space}%
@elsuads}\fi
\fi
\ifx@fnotes@empty\else@fnotes\fi
\iflongmktitle\if@twocolumn
\let\columnwidth=\Columnwidth\fi\fi
}

% Abstract
\renewenvironment{abstract}{%
\global\setbox\absbox=\hbox\bgroup%
\hsize=.4\textwidth%
\hskip-1pt}
{\newline
\mbox{~}\hfill\copyright~\the\year\
Elsevier~Ltd.~All~rights~reserved.\egroup%
}



% Keyword
\def\keyword{%
%\def\sep{\newline}%
\def\sep{\unskip\ignorespaces,\space}%
\def\MSC{@ifnextchar[{@MSC}{@MSC[2000]}}%
% \def@MSC[##1]{\leavevmode\hbox {\it ##1~MSC:}\newline}%
\def@MSC[##1]{\leavevmode\hbox {\it ##1~MSC:}~}%
\def\JEL{\newline\leavevmode\hbox {\it JEL:\space}}%
\def\KWD{%
\vspace*{10pt}\newline
% \leavevmode\hbox {\it Keywords:}\newline}%
{\it Keywords:}~}%
\global\setbox\keybox=\hbox\bgroup\hsize=.3\textwidth%
\fontsize{8pt}{10pt}\selectfont%
\parskip\z@%
\noindent%
\ignorespaces}
\def\endkeyword{\egroup}

%% Other customization

% Enumerate
\def\labelenumii{\labelenumi.\arabic{enumii}}

% Caption
\def\figurename{Fig.}

\long\def@makecaption#1#2{%
\vskip\abovecaptionskip\footnotesize\bfseries
\sbox@tempboxa{#1.~#2}%
\ifdim \wd@tempboxa >\hsize
#1.~#2\par
\else
\global @minipagefalse
\hb@xt@\hsize{\hfil\box@tempboxa\hfil}%
\fi
\vskip\belowcaptionskip}

\AtBeginDocument{\ifpreprint
\advance\baselineskip by 12pt
\fi}

\def\TM{^{\rm TM}}以上sty代码中只显示abstact的标题，我该如何修改使其在显示abstract的同时并列为articleinfo添加标题，根据\hspace*{7pt}&ABSTRACT\[8pt]这一行代码，显示类似的标题，标题内容为article info