因为有公式太长，一行打不下，换行又很别扭，所以最好是排版成双栏，这样美观一些。今天搜了一下怎么在 IEEE 论文模板下将公式排版成双栏的方法，特此记录。目前老唐采用的是下面的方法 1，效果达到预期。

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方法 1：IEEE官方修改（本文推荐）

\begin{figure*}
    \begin{equation}
    \label{eq-13}
    +++++++++++++++++
	Put equation here
	+++++++++++++++++   
    \end{equation}
    \hrulefill
    % \vspace*{4pt}
\end{figure*}

方法 2：IEEE官方，\begin{document}前插入\newcounter{mytempeqncnt}

\begin{figure*}[!t]
    % ensure that we have normalsize text
    \normalsize
    % Store the current equation number.
    \setcounter{mytempeqncnt}{\value{equation}}
    % Set the equation number to one less than the one
    % desired for the first equation here.
    % The value here will have to changed if equations
    % are added or removed prior to the place these
    % equations are referenced in the main text.
    \setcounter{equation}{12}
    \begin{equation}
    \label{eqn_dbl_x}
    
	+++++++++++++++++
	Put equation here
	+++++++++++++++++    
	
    \end{equation}
    % Restore the current equation number.
    \setcounter{equation}{\value{mytempeqncnt}}
    % IEEE uses as a separator
    \hrulefill
    % The spacer can be tweaked to stop underfull vboxes.
    \vspace*{4pt}
\end{figure*}

方法 3：\begin{document}前插入\usepackage{cuted}

\begin{strip}
    \begin{equation}
    +++++++++++++++++
	Put equation here
	+++++++++++++++++   
\end{strip}

参考：https://blog.csdn.net/qq_33039859/article/details/121891600