A.P. Preobrazhenskiy1, Ya.E. Lvovich2, T.V. Avetisyan3, Yu.P. Preobrazhenskiy4

1–4 Voronezh Institute of High Technologies (Voronezh, Russia)

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