E.A. Lupanova - Senior Lecturer, Nizhny Novgorod State Technical University n.a. R.E. Alekseev. E-mail: ealupano-va@yandex.ru S.L. Morugin - Head of Department, Nizhny Novgorod State Technical University n.a. R.E. Alekseev. E-mail: smoru-gin@yandex.ru