\begin{table}%t3 \caption{\label{Tab:nowd}Parameters of models without wind.} %\centerline {\small \par \begin{tabular}{cccccc} \hline \hline \noalign{\smallskip} Model & $\epsilon$ & $n$ & $t$\tablefootmark{a}& $d$ & $\tau$\\ name &~Gyr$^{-1}$ & &~Gyr &~Gyr &~Gyr \\ \hline 1 & 0.1 & 3 & 2/5/12.5 & 1/1/1 & 0.5 \\ 2 & 0.1 & 3 & 2/5/12.5 & 1/1/1 & 8 \\ 3 & 0.3 & 10 & 2/3/4/5/6/7/8/ & 0.4/0.1/.../0.1 & 8 \\ & & & 9/10.5/12.95 & & \\ 4 & 0.5 & 3 & 2/7/12.5 & 1/7/1 & 8 \\ 5 & 0.5 & 10 & 2/3.5/5/6.5/7.5/8.5/& 0.5/0.5/.../0.5 & 8 \\ & & & 9.5/10.5/11.5/12.75 & & \\ \hline \end{tabular}} \tablefoot{\tablefoottext{a}{The middle time of each burst.}} \end{table}