B. Khuc1, A.L. Gelgor2, T.E. Gelgor3, V.A. Vargauzin4, S.V. Rozov5

1–5 Peter the Great St. Petersburg Polytechnic University (St. Petersburg, Russia)

1 huk.tb@edu.spbstu.ru; 2 agelgor@spbstu.ru; 3 tanya.gelgor@yandex.ru; 4 vargauzinhn@gmail.com; 5 svroz@ya.ru

Bang Khuc1, A.L. Gelgor2

1, 2 Peter the Great St. Petersburg Polytechnic University (St. Petersburg, Russia) 1 huk.tb@edu.spbstu.ru; 2 agelgor@spbstu.ru

A.S. Beksaev1, S.V. Zavyalov2, Z.A. Erovenko3
1−3 Peter the Great St. Petersburg Polytechnic University (St. Petersburg, Russia)
1 beksaev_as@spbstu.ru; 2 zavyalov_sv@spbstu.ru; 3 zabalueva_za@spbstu.ru