Ya.V. Aleksakina1, G.S. Voronkov2, A.Kh. Sultanov3, I.V. Kuznecov4

1-4 Ufa University of Science and Technology (Ufa, Russia)

1 alelsakinayv@uust.ru; 2 voronkov.gs@ugatu.su; 3 sultanov.ah@ugatu.su; 4 kuznecov.iv@ugatu.su