[1] Int Islamic Univ, Dept Math & Stat, Islamabad, Pakistan
[2] King Fahd Univ Petr & Minerals, Ctr Modeling & Comp Simulat, Res Inst, Dhahran, Saudi Arabia
[3] King Fahd Univ Petr & Minerals, Ctr Commun & IT Res, Dhahran, Saudi Arabia
[4] Univ Calif Riverside, Dept Mech Engn, Riverside, CA 92521 USA