G.G. Vertogradov – Dr.Sc.(Phys.-Math.), Professor,
Southern Federal University (Rostov-on-Don)
Head of Department, JSC «VNII «Gradient» (Rostov-on-Don)

E-mail: vertogradovgg@gmail.com

V.G. Vertogradov – Ph.D.(Phys.-Math.), Head of Department,
JSC «VNII «Gradient» (Rostov-on-Don)

E-mail: v.vitaly@yandex.ru

V.A. Ivanov1, N.V. Ryabova2, N.A. Konkin3, M.I. Bastrakova4, A.A. Chernov5

1–5 Volga State University of Technology (Yoshkar-Ola, Russia)

1 IvanovVA@volgatech.net, 2 RyabovaNV@volgatech.net, 3 KonkinNA@volgatech.net,
4 BastrakovaMI@volgatech.net, 5 ChernovAA@volgatech.net