V.R. Krasheninnikov – Dr. Sc. (Eng.), Professor, Head of Department «Applied Mathematics and Informatics», Ulyanovsk State Technical University

E-mail: kvrulstu@mail.ru

O.E. Malenova – Post-graduate Student, Department «Applied Mathematics and Informatics»,  Ulyanovsk State Technical University E-mail: nika-lilu@yandex.ru