## 6 Combined Algorithm of PSO and ACO
### Restart of the Search Process When It Gets Stuck
\begin{table}
\begin{tabular}{c c c c} \hline
**Instance** & [26] & [27] & **Proposed Model** \\ \hline Att48 & - & 10,628 & 10,436 \\ \hline Brlin52 & 7542 & - & 7498 \\ \hline Lin318 & 42,020 & - & 41,998 \\ \hline Eil101 & 629 & 629 & 627 \\ \hline \end{tabular}
\end{table} 
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