中文摘要：

CHANG Zhengshi was born Gansu Province, China, in January 1984. He received the M.S. degree in College of Physics and Electronic Engineering in 2010, from Northwest Normal University, Lanzhou, China. He is currently working toward the Ph.D. degree in electrical engineering at Xi＇an Jiaotong University, Xi＇an, China. His research interests include the atmospheric pressure cold plasmas and its applications.E-mail： changzhsh 1984@ 163.com Z atmospheric pressure plasmas jet; helium; gas temperature; grating primary spectrum; grating secondary spectrum~ optical emission spectra was born in Shandong Province, China, in October 1970. He received the B.S., M.S. and Ph.D. degrees in eleclrical engineering from Xi＇an Jiaotong University （XJTU）, in 199l, 1994 and 2001, respectively. He is currently a Profes- sor with the State Key Laboratory of Electrical Insulation and Power equipment and the School of Electrical Engineering at XJTU. In 2011, he received the support of the National Science Found for Distinguished Young Scholars of China. His current research interests include dielectric phenomena under high voltage, discharge physics and plasma technology, and condition maintenance of power equipment. E-mail： gizhang@mail.xj tu.edu.cn