G.S. Tupitsin - Post-graduate Student, P.G. Demidov Yaroslavl State University. E-mail: genichyar@genichyar.com А.I. Topnikov - Ph.D. (Eng.), Assistent, P.G. Demidov Yaroslavl State University. E-mail: topartgroup@gmail.com А.L. Priorov - Dr.Sc. (Eng.), Associate Professor, P.G. Demidov Yaroslavl State University. E-mail: andcat@yandex.ru