I.V. Donets 1, A.M. Lerer 2, S.M. Tsvetkovskaya 3

1,2 JSC «All-Russian Scientific Research Institute «Gradient» (Rostov-on-Don, Russian)

1,2 Southern Federal University (Rostov-on-Don, Russian)

3 Don State Technical University (Rostov-on-Don, Russian)

1 igor_don2002@mail.ru, 2 amlerer@sfedu.ru, 3 tsvetkovskayas@mail.ru