1. Instituto Politécnico de Castelo Branco, Castelo Branco, Portugal
2. ALGORITMI Research Unit, University of Minho, Braga, Portugal
3. School of Intelligent Systems Science and Engineering, Jinan University, Zhuhai, People’s Republic of China
4. INESC TEC Technology and Science, Porto, Portugal
5. School of Sciences and Technology, University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal