Affiliation: | 1.School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo, 255000, Shandong, People’s Republic of China ;2.School of Engineering, Qufu Normal University, Rizhao, 276826, Shandong, People’s Republic of China ;3.School of Electrical Engineering, Korea University, Anam-Dong 5-Ga, Sungbuk-Gu, Seoul, 136-701, Republic of Korea ; |