I.V. Donets1, A.S. Pashchenko2, Ya.A. Reyzenkind3, V.N. Schevchenko4

1,3,4 JSC «ARSRI «Gradient» (Rostov-on-Don, Russia)

1,3 Southern Federal University (Rostov-on-Don, Russia)

2 Don State Technical University (Rostov-on-Don, Russia)