А. А. Baydarov - Ph.D. (Eng.), Research Scientist, Perm National Research Polytechnic University. Е-mail: cchp@bk.ru
А. А. Yuzhakov - Dr.Sc. (Eng.), Professor, Perm National Research Polytechnic University. Е-mail: uz@at.pstu.ru
D. G. Chuhriy - Under-Graduate, Perm National Research Polytechnic University