1. Department of Electrical Engineering, Measurement Technology and Instrumentation Key Laboratory of Hebei Province, Yanshan University, Qinhuangdao, China
2. School of Photovoltaic Materials, Jiangxi New Energy Technology Institute, Xinyu, China
3. Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, PA, USA
4. School of Mechanical Engineering, Yanshan University, Qinhuangdao, China