S.Yu. Tverskaya1, A.N. Tychkova2, Z.M. Yuldashev3, O.S. Simakova4, Y.R. Lukanina5

1,2,4,5 Penza State University (Penza, Russia)
3 Saint Petersburg State Electrotechnical University (Saint Petersburg, Russia)
1 tverskaya_sofya@mail.ru, 2 tychkovа-annf@mail.ru, 3 yuld@mail.ru, 4 zcsio@mail.ru, 5 kaneeva58@yandex.ru