[1] College of Information Science and Engineering, Yanshan University, No. 438, Hebei Ave., Qinhuangdao 066004, China
[2] Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province, Yanshan University, No. 438, Hebei Ave., Qinhuangdao 066004, China
[3] College of Electrical Engineering, Yanshan University, No. 438, Hebei Ave., Qinhuangdao 066004, China