车流平均行车时间t 一列表格高度太小,求调整
\documentclass{ctexart}
\begin{document}
\begin{table}[!htbp]
\caption{评价指标体系}\centering
\begin{tabular}{c|c}
\Xhline{1.5pt}
\makebox[0.4\textwidth][c]{指标} & \makebox[0.4\textwidth][c]{表达式} \\
\hline
路网密度$\omega$ & $ \omega=\dfrac{ L}{S} $ \\
\hline
\rule{0pt}{15pt} 车流平均行车时间t & $ t=A\cdot t_{0}\left[1+0.5668\left(\dfrac{Q}{C}\right)^{1.4331}\right]+A\cdot\frac{B}{2}\displaystyle\sum_{j=1}^{n}{t_{2}}^{j} $\\
\hline
路网节点度方差E &$ E(\phi)=\dfrac{1}{N}\displaystyle\sum_{m=1}^{N} \left(\phi_{m}-\phi\right)^{2}$ \\
\Xhline{1.5pt}
\end{tabular}
\end{table}
\end{document}