中文摘要：

LIU Fei was born in Jiangxi Province, China in 1982. He received the B.S. and M.S. degrees in electrical engineering in 2003 from Xi＇an Jiaotong University and in 2006 from Shanghai Jiao Tong University, China, respectively. Since 2006, he has become an employee of Shanghai Jiao Tong University, China. In 2008, he became a Ph.D. student in electrical engineering at Shanghai Jiao Tong University. E-mail： feiliu@sjtu.edu.cn JIANG Pingkai was born in Jiangxi Province, China in 1960. He received the Ph.D. degree in electrical materials and insulation technology in 1995 at Xi＇an Jiaotong University. Currently, he is the Director of Shanghai Key Lab of Electrical Insulation and Thermal Ageing and Director of Research Center of Dielectric and Electrical Insulation. He also is a professor of Department of Polymer Science and Engineering at Shanghai Jiao Tong University. He has worked on electrical/thermal ageing of polymeric insulating materials, VPI insulation technology, fire retardant materials for cable insulation, water treeing phenomena in XLPE and polymer nanocomposites for dielectric application. E-mail： pkjiang@sjtu.edu.cn LEI Qingquan was born in Sichuan Province, China in 1938. He was elected academician in the Chinese Academy of Engineering in 2003. He is a professor of the School of Electrical and Electronic Engineering, Harbin Polytechnic University. He conducts teaching and research on basic theory of insulation technology and its application. He studied the movement of electrons in insulating polymeric material, in the use of technology of the thermally stimulated current curve, and in assessing the characteristics of the electrical ageing as well as in directing material modification. He discovered new conductive properties and has produced pressure and temperature sensors. He is the Director of the Academic Committee of Shanghai Key Lab of Electrical Insulation and Thermal Ageing.