1. The Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. XinJiang Laboratory of Minority Speech and Language Information Processing, Chinese Academy of Sciences, Urumqi 830011, China
4. Guang Dong Polytechnic College, Zhaoqing 526100, Guangdong, China