[Zhou, Jian;Li, Lijun] Ctr South Univ Forestry & Technol, Machinery & Elect Engn Coll, Changsha 410004, Hunan, Peoples R China.^[Hu, Yihua;Cheng, Ke] Guangxi Univ Technol, Lushan Coll, Liuzhou 545006, Peoples R China.^[Yang, Jianguo] Zhuzhou Gear CO LTD, Zhuzhou 412000, Peoples R China.