1. Institute of High Current Electronics, Siberian Branch (SB), Russian Academy of Sciences (RAS)Tomsk634055Russia
2. National Research Tomsk State UniversityTomsk634050Russia
3. National Research Tomsk Polytechnic UniversityTomsk634050Russia
4. Institute of Electrical Engineering, Chinese Academy of SciencesBeijing100190People's Republic of China
5. University of Chinese Academy of SciencesBeijing100039People's Republic of China