带有一个半间距和 \linebreak 命令的标题

Question

我想使字幕对齐，并将其间距设置为 1.5。同时，我希望能够\linebreak在字幕环境中使用命令在所需位置分割线。

例子：

\documentclass[a4paper, 12pt]{article}

\usepackage{geometry}
\geometry{margin=25mm}
\setlength{\parskip}{1em}
\setlength\parindent{0em}

\usepackage{float}

\usepackage[onehalfspacing]{setspace}

\begin{document}

\begin{table}[H]
\caption{Gas permeability and CO2-CH4 selectivity of PEI-GO MMM (Koolivand et al. [34])}
\label{tab:mmm1}
\vspace*{-\baselineskip}
\begin{center}
    table is here
\end{center}
\end{table}

\end{document}

这里我有一个两端对齐的标题。我想设置一个半间距。我还想在“PEI-GO MMM”之后拆分行，并使第一行两端对齐。

当使用caption带font=onehalfspacing选项的包时，标题的第一行会缩进。其次，命令\linebreak运行出错。结果如下：

\documentclass[a4paper, 12pt]{article}

\usepackage{geometry}
\geometry{margin=25mm}
\setlength{\parskip}{1em}
\setlength\parindent{0em}

\usepackage{float}

\usepackage[onehalfspacing]{setspace}
\usepackage[style=base,font=onehalfspacing]{caption}

\begin{document}

\begin{table}[H]
\caption{Gas permeability and CO2-CH4 selectivity of PEI-GO MMM \linebreak (Koolivand et al. [34])}
\label{tab:mmm1}
\vspace*{-\baselineskip}
\begin{center}
    table is here
\end{center}
\end{table}

\end{document}

出现linebreak错误：

Argument of \caption@ydblarg has an extra }. ... (Koolivand et al. \cite{Koolivand2014})}
Paragraph ended before \caption@ydblarg was complete. ... (Koolivand et al. \cite{Koolivand2014})}

有人可以重现这个错误并建议如何删除第一行缩进和错误吗？

完整文档的日志文件是这里。

Answer 1

\abovecaptionskip您可以使用长度和来控制标题周围的间距\belowcaptionskip。请注意，表格环境内部和标题内部的本地更改。

\documentclass[a4paper, 12pt]{article}

\usepackage{geometry}
\geometry{margin=25mm}
\setlength{\parskip}{1em}
\setlength\parindent{0em}

\usepackage{float}

\usepackage[onehalfspacing]{setspace}

\begin{document}

\begin{table}[H]
\hrule
\caption{\baselineskip=1.5\baselineskip
  Gas permeability and CO2-CH4 selectivity of PEI-GO MMM (Koolivand et al. [34])}
\label{tab:mmm1}
\hrule
\end{table}

\end{document}

Answer 2

还有一些其他的解决方案，包括copyrightbox和threeparttable。对于标题和表格之间的间距，caption包中有键，并且它足够智能，可以在调用标题时交换和skip=的值\abovecaptionskip\belowcaptionskip前表格代码。

\documentclass[a4paper, 12pt]{article}

\usepackage{geometry, copyrightbox, threeparttable}
\geometry{showframe, margin=25mm}
\setlength{\parskip}{1em}
\setlength\parindent{0em}

\usepackage{float}

\usepackage[onehalfspacing]{setspace}
\usepackage[style=base, font=onehalfspacing, format=hang, skip = 6pt]{caption}

\begin{document}

\begin{table}[H]
\caption{Gas permeability and CO2-CH4 selectivity of PEI-GO MMM \\ (Koolivand et al. [34])\medskip}
\label{tab:mmm1}
\centering
\fbox{\makebox[0.5\linewidth]{ table is here}}
\end{table}
\vskip1cm
\begin{table}[H]
\centering
\captionsetup{font=singlespacing, skip = 0pt}
\caption{Gas permeability and CO2-CH4 selectivity of PEI-GO MMM}
\label{tab:mmm2}
\copyrightbox[b]{\fbox{\makebox[0.5\linewidth]{ table is here}}}{(Koolivand et al. [34]}
\end{table}

\vskip1cm
\begin{table}[H]
\centering
\captionsetup{font=singlespacing}
\begin{threeparttable}
\caption{Gas permeability and CO2-CH4 selectivity of PEI-GO MMM\tnote{*} }
\label{tab:mmm3}
\begin{tabular}{@{}c@{}}
\fbox{\makebox[0.5\linewidth]{ table is here}}
\end{tabular}
\begin{tablenotes}[flushleft]\footnotesize\smallskip
  \item[*]Koolivand et al. [34]
\end{tablenotes}
\end{threeparttable}
\end{table}

\end{document}