N.P. Erofeev − Chief of Educational Computing Laboratory, Physics-Technical Faculty, Saratov State Technical University n.a. N.G. Chernyshevskii. Е-mail: erofeevnp@mail.ru V.M. Zakharov − Post-graduate Student, Department of Mathematics and Modeling Saratov State Technical University n.a. N.G. Chernyshevskii. Е-mail: tak@sun.ru E.Yu. Krylova − Assistant, Department of Mathematical and Computer Modeling, Saratov State Technical University n.a. N.G. Chernyshevskii. Е-mail: kat.krylova@bk.ru V.A. Krysko − Dr.Sc. (Eng.), Head of Department of Mathematics and Modeling, Saratov State Technical University n.a. N.G. Chernyshevskii. Е-mail: tak@sun.ru I.V. Papkova − Ph.D. (Phys.-Math.), Associate Professor, Department of Mathematics and Modeling, Saratov State Technical University n.a. N.G. Chernyshevskii. Е-mail: ikravzova@mail.ru