G.V. Antsev - Ph. D. (Eng.), Associate Professor, General Director, General Product Engineer of Concern «Agate». E - mail: gen_director@concern-agat.ru E.G. Borisov - Ph. D. (Eng.), Associate Professor, Leading Research Scientist, Bonch-Bruevich Saint-Petersburg State University of Telecommunications E-mail: begspb1967@mail.ru I.A. Lebedev - Ph. D. (Phys.-Math.), Associate Professor, Department of Higher Mathematics, The National Mineral Resources University (Saint Petersburg) E-mail: Lebed98@yandex.ru