1. School of Electronics and Telecommunications, Hanoi University of Science and Technology, 01 Dai Co Viet, Hanoi, Vietnam
2. Division of Dynamics, Lodz University of Technology, Stefanowskiego 1/15, 90-924 Lodz, Poland
3. Biomedical Engineering Department, Amirkabir University of Technology, Tehran 15875-4413, Iran
4. Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, GR-54124, Greece