%0 Journal Article %T EMPSACO: An improved hybrid optimization algorithm based on particle swarm, ant colony and elitist mutation algorithms %A Abbas Khashei- Siuki %A Issa Tadayoni Navaei %A Ghahraman, Bijan %A Mahdi Kouchakzadeh %J Iranian Journal of Science and Technology-Transactions of Civil Engineering %@ 2228-6160 %D 2013