1. Laboratory of Modeling and Simulation in Engineering, Biomimetics and Prototypes, Faculty of Science, University of Yaoundé I 1 , P.O. Box 812, Yaoundé, Cameroon
2. Chaos and Complex Systems Research Laboratory, Department of Physics, University of Burdwan 2 , Burdwan 713 104, India
3. Institut für Theoretische Physik, Technische Universität Berlin 3 , Hardenbergstraße 36, 10623 Berlin, Germany
4. Potsdam Institute for Climate Impact Research 4 , Telegrafenberg A 31, 14473 Potsdam, Germany
5. Bernstein Center for Computational Neuroscience Berlin, Humboldt-Universität 5 , 10115 Berlin, Germany
6. Fundamental Physics Laboratory, Department of Physics, Faculty of Science, University of Douala 6 , P.O. Box 24 157, Douala, Cameroon