1. Yantai Research Institute, Harbin Engineering University, No. 1 Qingdao Street, Yantai Economic & Technological Development Area, Yantai 264000, P. R. China
2. Weihai Tiante Intelligent Technology Co. Ltd., Weihai 264209, P. R. China
3. School of Automotive Engineering, Harbin Institute of Technology, Weihai 264209, Shandong, P. R. China
4. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China