1. CINVESTAV-IPN, Evolutionary Computation Group, Dpto. de Ing. Elect./Secc. Computatión, Av. IPN No. 2508, Col. San Pedro Zacatenco, México, D.F. 07300, MEXICO
2. Department of Electrical and Computer Engineering, Graduate School of Engineering and Management, Air Force Institute of Technology, WPAFB, Dayton, Ohio, 45433, USA