Lv, Shengmei
Xiong, Liming
Su, Guifu
Zhao, Ning
Funding for this research was provided by:
the National Natural Science Foundation of China (11471037)
Specialized Research Fund for the Doctoral Program of Higher (20131101110048)
Natural Science Foundation of Qinghai (No.2011-z-911)
Qinghai Nationalities University (2015XJZ11)