\begin{table}%t2
  \caption {\label{tab:speed}Total survey time for different FAST surveys.
   }
 %\centerline
 { \begin{tabular}{lrrrrrrr}
\hline
\hline
Parameter             & Model 1 & Model 2 & Model 3 & Model 4 & Model 5 & Model 6 & Model 7 \\
\hline
Survey region         & $|{b}| < 5^\circ$   & $|{b}| < 10^\circ$ & $|{b}| < 5^\circ$ & $|{b}| < 10^\circ$   
                      & $|{b}| < 5^\circ$   & $|{b}| < 10^\circ$  & Visible Sky \\
Pointing time (s)                        & 600    & 600    & 600    & 600    & 1800 & 1800 & 120 \\
Number of beams                          &  19    & 19     & 100    & 100    & 100    & 100    & 100 \\
Number of normal pulsars detected        & 5100 & 6300 & 4200 & 5200 & 5700 & 7000 & 4500 \\ 
Number of MSPs detected                  & 470    & 670    & 380    & 550    & 550    & 770    & 500  \\ 
Currently known normal pulsars in region & 352    & 418    & 352    & 418    & 352    & 418    &  662 \\  
Currently known MSPs in region           & 14     & 20     & 14     & 20     & 14     & 20     &  62  \\  
Total survey time (eight hour days)          &  229    &  454    &  44     & 86     &  131    &  259    &  296 \\
\hline
  \end{tabular}}
\par
  \smallskip
\par
  Except for
    model~7, the survey region is limited in Galactic longitude by
    $20^\circ<\rm{l}<90^\circ$. The survey time is expressed in number
    of days with eight hours of observation. The number of detected
    normal and millisecond pulsars are rounded to the nearest~100, and~10, respectively. The number of known pulsars has been obtained
    from the ATNF Pulsar Catalogue~\citep{Manchester05}.
  \end{table}