如何防止双线变成单条粗线

Question

\begin{table*}[!htp]
\setlength\extrarowheight{6pt}
\renewcommand{\arraystretch}{1.3}
\setlength\doublerulesep{.5pt}
\caption{something}\label{title}
\centering
\begin{tabular}
{| >{\centering\arraybackslash}m{1in} || >{\centering\arraybackslash}m{1.1in} || >{\centering\arraybackslash}m{1.4in} || >{\centering\arraybackslash}m{1.2in}|}
 \hline
 \hline
 \textbf{\small Techniques}   &  \textbf{\small Aim} & \textbf{\small Distinctive attributes} &  \textbf{\small Limitations} \\ %\midrule
 \hline
something \cite{8}&  something& something& something\\
\hline

我遇到一个问题，即其他列中有双线，但我只有单条粗线，请解决它。

Answer 1

这是一个已知的查看器问题。在某些缩放级别，您会看到上面发布的效果，而在其他缩放级别，您会看到不同的效果。以下是使用修改后doublerulesep和默认的示例。代码取自你之前的帖子。

\documentclass[two column,conference]{IEEEtran}
\usepackage{array}
\begin{document}

\begin{table}[!htp]
%\setlength\extrarowheight{6pt}
\renewcommand{\arraystretch}{1.3}
\setlength\doublerulesep{.5pt}
\caption{something doublerulesep = 0.5pt}\label{title0}
\centering
\begin{tabular}
{| >{\centering\arraybackslash}m{1in} || >{\centering\arraybackslash}m{1.1in} || >{\centering\arraybackslash}m{1.4in} || >{\centering\arraybackslash}m{1.2in}|}
 \hline
 \hline
 \textbf{\small Techniques}   &  \textbf{\small Aim} & \textbf{\small Distinctive attributes} &  \textbf{\small Limitations} \\ %\midrule
 \hline
something \cite{8}&  something& something& something\\
\hline
\end{tabular}
\end{table}

\begin{table}[!htp]
%\setlength\extrarowheight{6pt}
\renewcommand{\arraystretch}{1.3}
%\setlength\doublerulesep{.5pt}
\caption{something doublerulesep as default}\label{title1}
\centering
\begin{tabular}
{| >{\centering\arraybackslash}m{1in} || >{\centering\arraybackslash}m{1.1in} || >{\centering\arraybackslash}m{1.4in} || >{\centering\arraybackslash}m{1.2in}|}
 \hline
 \hline
 \textbf{\small Techniques}   &  \textbf{\small Aim} & \textbf{\small Distinctive attributes} &  \textbf{\small Limitations} \\ %\midrule
 \hline
something \cite{8}&  something& something& something\\
\hline
\end{tabular}
\end{table}

\end{document}

在另一个缩放级别（160％）下，它显示如下：

然而，使用booktabs包可以得到更好的结果：

\newcolumntype{M}[1]{>{\centering\arraybackslash}m{#1}}
\begin{table*}[!htp]
\caption{something with booktabs}\label{title1}
\centering
\begin{tabular}{M{1in} M{1.1in} M{1.4in} M{1.2in}}
\toprule
\textbf{Techniques} & \textbf{Aim} & \textbf{Distinctive attributes} & \textbf{Limitations} \\ \midrule
something \cite{8}  & something    & something                       & something            \\
something \cite{8}  & something    & something                       & something            \\
\bottomrule
\end{tabular}
\end{table*}