S.V. Ermak1, V.V. Semenov2, O.V. Ermak3

1,2 Higher school of applied physics and space technologies, Institute of Electronics and Telecommunications, Peter The Great St. Petersburg Polytechnic University (Saint-Petersburg, Russia)

3 Higher School of Hydraulic and Power Engineering, Institute of Civil Engineering, Peter The Great St. Petersburg Polytechnic University (Saint-Petersburg, Russia)

R.K. Lozov – Engineer, 

Higher School of Applied Physics and Space Technologies of Peter The Great St. Petersburg Polytechnic University E-mail: Lozov-RK@ya.ru

S.V. Ermak – Dr.Sc.(Phys.-Math.), Associate Professor, 

Higher School of Applied Physics and Space Technologies of Peter The Great St. Petersburg Polytechnic University E-mail: serge_ermak@mail.ru

V.V. Semenov – Dr.Sc.(Phys.-Math.), Leading Engineer, 

Higher School of Applied Physics and Space Technologies of Peter The Great St. Petersburg Polytechnic University E-mail: Vladimir_semenov@mail.ru

O.V. Ermak – Ph.D.(Eng.), Associate Professor, 

Institute of Civil Engineering of Peter The Great St. Petersburg Polytechnic University E-mail: ermak_olgavalentinovna@mail.ru

S.V. Ermak1, V.V. Semenov2, A.A. Baranov3, R.K. Lozov4

1–4 Peter the Great St. Petersburg Polytechnic University (St. Petersburg, Russia)