\documentclass[a4paper]{article}
\usepackage{array}
\setlength\extrarowheight{0.5pt}
\begin{document}
\begin{equation}
q\_s_ {a,b} \stackrel{.}{=} (q(s_ {semantic}), \ q(s_ {QoS}))
\end{equation}
\begin{equation}
q\_s_ {a,b} \stackrel{.}{=} (q(s_ {mt}), \ q(s_ {dst}), \ q(s_t),\ q(s_c),\ q(s_r),\ q(s_a))
\end{equation}
% Please add the following required packages to your document preamble:
% \usepackage{multirow}
\begin{table}[]
\caption{Quality Aggregation Matrix for semanic web service composition}
\begin{tabular}{|c|c|c|c|c|l|l|}
\hline
\multirow{\begin{tabular}[c]{@{}c@{}}$Composition$\\
$Construct$\end{tabular}} & \multicolumn{6}{c|}{$Quality Factors$}
\\ \cline{2-7}
& \multicolumn{2}{c|}{$Functional$} & \multicolumn{4}{c|}{$Non Functional$} \\ \cline{2-7}
$& $Q(s_ {mt})$ & $Q(s_ {dst})$ & $Q(s_t)$ & $Q(s_c)$ & $Q(s_r)$ & $Q(s_a)$ \\ \hline
$Sequence$ $& $\prod_{n=1}^{m} q(s_ {mt})$ & $(\sum_{n=1}^m q(s_ {dst}))/m$&$\sum_{n=1}^m q(s_ {t})$&$\sum_{n=1}^m q(s_ {c})$&$\prod_{n=1}^{m} q(s_r)$&$\prod_{n=1}^{m} q(s_a)$\\ \hline
$Parallel$ & $\prod_{n=1}^{m} q(s_ {mt})$ &$(\sum_{n=1}^m q(s_ {dst}))/m$ & $max(q(s_ {t})) &$\sum_{n=1}^m q(s_ {c})$ &$\prod_{n=1}^{m} q(s_r)$ &$\prod_{n=1}^{m} q(s_a)$ \\ \hline
$Choice$ & $\sum_{n=1}^m w\_s \cdot q(s_ {mt})$ & $\sum_{n=1}^m w\_s \cdot q(s_ {dst})$ & $\sum_{n=1}^m w\_s \cdot q(s_ {t})$ & $\sum_{n=1}^m w\_s \cdot q(s_ {c})$ &$\sum_{n=1}^m w\_s \cdot q(s_ {r})$ & $\sum_{n=1}^m w\_s \cdot q(s_ {a})$ \\ \hline
\end{tabular}
\end{table}
\end{document}
答案1
在表环境定义后添加\small或。\tiny
答案2
\noindent
\resizebox{\linewidth}{!}{%
... your tabular ...
}
然后您可以选择默认字体大小。需要包graphicx。