1. University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
2. INESC TEC-INESC Technology and Science, Porto, Portugal
3. Institute of Engineering of Coimbra/Polytechnic Institute of Coimbra, Coimbra, Portugal
4. Knowledge Research Group on Intelligent Engineering and Computing for Advanced Innovation and Development (GECAD) of the ISEP, IPP, Porto, Portugal