[Xue, Hao;Li, Yanjun;Zhang, Ying;Yue, Tao;Cheng, Hu] Petrochina Lanzhou Petrochem Co, Electromech Instrument Operat & Maintenance Ctr, Lanzhou, Peoples R China.^[Gou, Hengxiang] Changsha Univ Sci & Technol, Inst Elect & Informat Engn, Changsha, Peoples R China.