S.P. Fomin - Post-graduate Student, Department «Physics and Applied Mathematics», Murom branch Vladimir State University named after A.&N. Stoletovs. E-mail: sergeyfomin@f5f5.ru A.A. Orlov - Dr. Sc. (Eng.), Associate Professor, Head of Department «Physics and Applied Mathematics», Murom branch Vladimir State University named after A.&N. Stoletovs. E-mail: AlexeyAlexOrlov@gmail.com