I. Introduction
Xiaobai used the IEEE template, and there were too many formulas in the double column, so he used the following method.
2. Technical realization
1. Adjust the overall size, the code is as follows:
\small{
}\small can be replaced with: \footnotesize, \scriptsize, \tiny instead of \small, and the size decreases sequentially.
2. Adjust the width of the column spacing in the matrix, the code is as follows:
\setlength{\arraycolsep}{1.2pt}The numbers are modified as needed.
Three. Examples
\small{
\begin{align}
\setlength{\arraycolsep}{1.2pt}
\begin{array}{lc}
L=\dfrac{\partial Q}{\partial l}\Big|_{l=0}=\vspace{0.5ex}\\
\begin{bmatrix}
0 & 1 & -k_1\kappa_1 & -k_2\kappa_2 & 0\\
a_2\frac{\beta_3}{\beta_1} & a_1k_1\kappa_1 & -a_1k_2\kappa_2+\frac{\beta_3}{\beta_1}\kappa_3 & -\frac{\beta_3}{\beta_1}\kappa_3\\
1 & 0 & 0 & 0 & 1\\
\frac{\beta_2}{\beta_1}\kappa_4 & 0 & -k_1\kappa_1 & -\frac{\beta_2}{\beta_1}\kappa_4-k_2\kappa_2 & \frac{\beta_2}{\beta_1}\kappa_4\\
\frac{\beta_2}{\beta_1}\kappa_4 & -1 & 0 & -\frac{\beta_2}{\beta_1}& \frac{\beta_2}{\beta_1}\kappa_4-\beta_1\kappa_5
\end{bmatrix}
\end{array}
\label{equation: state function 11}
\end{align}}