1. Department of Petroleum Engineering, Petroleum University of Technology, Ahwaz, Iran e-mail:
2. Dynamical Systems & Control (DSC) Research Laboratory, Department of Electrical Engineering, School of Engineering, Persian Gulf University, P.O. Box 75169, Bushehr, Iran e-mail:
3. Department of Electrical Engineering, Institute of Engineering, Polytechnic of Porto, Rua Dr. Antonio Bernardino de Almeida, 431, Porto 4200-072, Portugal e-mail: