怎样才能在不减少数值的情况下减小整个方程的大小？

Question

我有一个方程式需要减小其大小，但方程式编号似乎也变小了。我怎样才能减小其大小，同时保持其标签的正常大小？

我的源代码：

\documentclass[11pt, a4paper]{book}

\usepackage{amsmath}
\usepackage{amssymb, amsfonts}

\usepackage{tabularx}
\usepackage{booktabs}
\newcommand {\arraystretchdefaultl} {1.3}
\newcommand{\arraystretchdefault}{ \renewcommand {\arraystretch} {\arraystretchdefaultl} }
\arraystretchdefault

\usepackage{makecell}


\begin{document}


\begin{equation}
\scriptsize
\left[
\begin{array}{c}
V_{i} \\ \midrule[0.25mm]
0
\end{array}
\right]
%
=
%
\renewcommand{\arraystretch}{1.6}
\left[
\begin{array}{c c !{\vrule width 0.25mm}c c}
& Z_{orig} &  & col. \medspace k - col. \medspace p \\ \Xcline{1-4}{0.25mm}
& row. \medspace k - row. \medspace p & & Z_{th,kp}+Z_{b}\\
\end{array}
\right]
%
\arraystretchdefault
\left[
\begin{array}{c}
I_{i} \\ \midrule[0.25mm]
I_{q}
\end{array}
\right]
\end{equation}


\begin{equation}
\left[
\begin{array}{c}
V_{i} \\ \midrule[0.25mm]
0
\end{array}
\right]
%
=
%
\renewcommand{\arraystretch}{1.6}
\left[
\begin{array}{c c !{\vrule width 0.25mm}c c}
& Z_{orig} &  & col. \medspace k - col. \medspace p \\ \Xcline{1-4}{0.25mm}
& row. \medspace k - row. \medspace p & & Z_{th,kp}+Z_{b}\\
\end{array}
\right]
%
\arraystretchdefault
\left[
\begin{array}{c}
I_{i} \\ \midrule[0.25mm]
I_{q}
\end{array}
\right]
\end{equation}

\end{document}

Answer 1

由于您的问题对我来说不清楚，我只怀疑您正在寻找类似这样的内容：

对于上述方程，我删除了arrays 中所有不必要的列，减少\arraycolsep并简化了的使用\renewcommand{\arraystretch}{...}。我还equation用gather数学环境替换了：

\documentclass[11pt, a4paper]{book}
\usepackage{amsmath, amssymb}
\usepackage{array, makecell}
    \setlength\arraycolsep{3pt}
    \renewcommand{\arraystretch}{1.3}

\begin{document}
    \begin{gather}
    \renewcommand{\arraystretch}{1.6}
\left[\begin{array}{c}
V_{i}   \\
\Xcline{1-1}{0.25mm}
0
\end{array}\right]
=
\left[\begin{array}{c !{\vrule width 0.25mm} c }
                    Z_{orig}    & \text{col. } k - \text{col. } p   \\
    \Xcline{1-2}{0.25mm}
\text{row. } k - \text{row. } p & Z_{th,kp}+Z_{b}
\end{array}\right]
%
\left[\begin{array}{c}
I_{i} \\
\Xcline{1-1}{0.25mm}
I_{q}
\end{array}\right]
                            \\
    \renewcommand{\arraystretch}{1.6}
\left[\begin{array}{c}
V_{i} \\
\Xcline{1-1}{0.25mm}
0
\end{array}\right]
=
\left[\begin{array}{c !{\vrule width 0.25mm} c}
                    Z_{orig}    & \text{col. } k - \text{col. } p \\
\Xcline{1-2}{0.25mm}
\text{row. } k - \text{row. } p & Z_{th,kp}+Z_{b}
\end{array}\right]
%
\left[\begin{array}{c}
I_{i} \\
\Xcline{1-1}{0.25mm}
I_{q}
\end{array}\right]
    \end{gather}
\end{document}

注意：amssymb包（现在）包含amsfonts，因此不需要再次加载它。