Ya.E. Lvovich1, A.P. Preobrazhenskiy2, Yu.P. Preobrazhenskiy3, T.V. Avetisyan4

1 Voronezh State Technical University (Voronezh, Russia)

2–4 Voronezh Institute of High Technologies (Voronezh, Russia)

1 office@vivt.ru, 2 app@vivt.ru, 3 petrovich@vivt.ru, 4 vtatyana_avetisyan@mail.ru