1. Artificial Intelligence Systems and Neurotechnologies, Yuri Gagarin State Technical University of Saratov, Politehnicheskaya, 77, Saratov 410054, Russia
2. Saratov State University, Astrakhanskaya, 83, Saratov 410012, Russia
3. Center for Biomedical Technology, Technical University of Madrid, Campus Montegancedo, 28223 Pozuelo de Alarcon, Madrid, Spain
4. Department of Industrial Engineering, Laboratory of Electrical Engineering and Bioengineering, Universidad de La Laguna, Tenerife, Spain