V.N. Klyachkin - Dr. Sci. (Eng.), professor of chair «Applied mathematics and computer science» Ulyanovsk State Technical University. E-mail: v_kl@mail.ru
D.S. Bubyr - post-graduate student of chair «Applied mathematics and computer science», Ulyanovsk State Technical University. E-mail: lbubir91@mail.ru

I.A. Damaratskiy – Ph.D.(Eng.), Senior Research Scientist, 

Bauman Moscow State Technical University

E-mail: IDamaratskiy@yandex.ru