V.N. Ruchkin1, B.V. Kostrov2, D.V. Grigorenko3, D.R. Pikulin4, E.V. Ruchkina5

1 Moscow University named after S.J. Vitte (Ryazan branch) (Moscow, Russia)
2,3,5 Ryazan state radioengineering university named after V.F. Utkin (Ryazan, Russia)
4 Ryazan state university named after S.А. Yesenina (Ryazan, Russia)
1 v.ruchkin@muv.ru, v.ruchkin@rsu-rzn.ru, 2 kostrov.b.v@evm.rsreu.ru, 3 info@rznprb.com, 4 d.pikulin@rsu-rzn.ru,
5 ek-ruchkina@yandex.ru