1. Department of Computer Science, Faculty of Engineering, Universidad de Talca, Curicó, Chile
2. Technological Center for Energy Conversion, Faculty of Engineering, Universidad de Talca, Curicó, Chile
3. Department of Electrical and Electronic Engineering, Faculty of Science and Engineering, University of Nottingham, Nottingham, U.K.
4. School of Electrical Engineering and Computer Science, University of Newcastle, Callaghan, NSW, Australia
5. Department of Electrical Engineering, Faculty of Engineering, Universidad Católica de la Santísima Concepción, Concepción, Chile
6. Department of Electrical and Electronic Engineering, Universidad del Bío-Bío, Concepción, Chile