1. Department of Theoretical Bases of Heat Engineering, National Research University Moscow Power Engineering Institute, 111250 Moscow, Russia
2. Department of Mathematics, Military Educational and Scientific Center of the Air Force “N.E. Zhukovsky and Y.A. Gagarin Air Force Academy”, 394064 Voronezh, Russia
3. Department of Physics and Technology of Electrical Materials and Components, National Research University Moscow Power Engineering Institute, 111250 Moscow, Russia