实现上面列表样式的代码如下：

\begin{table}[!t]
\centering
%\footnotesize
\caption{Diagnostic performances of DVB, BDM and LEB procedures under multivariate normal distribution with a long-range correlation structure.}
\label{tab1} % 表1
\setlength{\tabcolsep}{0.1mm}{
\begin{tabular}{
p{0.08\textwidth}<{\centering}
p{0.15\textwidth}<{\centering}
p{0.15\textwidth}<{\centering}
p{0.15\textwidth}<{\centering}
p{0.15\textwidth}<{\centering}
p{0.15\textwidth}<{\centering}
p{0.15\textwidth}<{\centering}
}
\hline
& \multicolumn{2}{c}{DVB} & \multicolumn{2}{c}{BDM}
& \multicolumn{2}{c}{LEB}   \\
\cmidrule(lr){2-3} \cmidrule(lr){4-5} \cmidrule(lr){6-7}
$(n_1,n_2)$ &  {$C$} & {$ENE$} & {$C$} & {$ENE$}  & {$C$} & {$ENE$} \\
\hline%\hdashline
\specialrule{0em}{2pt}{2pt}
& \multicolumn{6}{c}{$\Delta=0.6$}\\
(100,50)&0.280&1.230&0.405&1.040&0.227&1.214\\
(150,75)&0.645&0.565&0.615&0.540&0.477&0.698\\
(200,100)&0.740&0.350&0.670&0.520&0.672&0.399\\
\specialrule{0em}{2pt}{2pt}
& \multicolumn{6}{c}{$\Delta=1.0$}  \\
(100,50)&0.880&0.145&0.840&0.210&0.793&0.238\\
(150,75)&0.880&0.125&0.895&0.120&0.888&0.129\\
(200,100)&0.900&0.100&0.940&0.065&0.909&0.101\\
\specialrule{0em}{2pt}{2pt}
& \multicolumn{6}{c}{$\Delta=1.4$} \\
(100,50)&0.960&0.040&0.935&0.070&0.904&0.106\\
(150,75)&0.965&0.035&0.950&0.050&0.931&0.076\\
(200,100)&0.915&0.085&0.970&0.030&0.947&0.056\\
\hline
\multicolumn{7}{l}{}\\
\end{tabular}
}
\end{table}	

参数解释：