A.S. Davydenko 1, E.N. Popov 2, I.A. Tsikin 3
1 LLC «Special Technology Center» (Saint-Petersburg, Russia)
2,3 Peter The Great St. Petersburg Polytechnic University (Saint-Petersburg, Russia)
1 adavydenko@stc-spb.ru; 2 evgeniy.retc@gmail.com; 3 tsikin@mail.spbstu.ru