Funding for this research was provided by:
National Natural Science Foundation of China (61271233, 51401004, 61601005)
the Ph.D. Programs Foundation of Anhui Normal University (2016XJJ129)
Plan of introduction and cultivation of university leading talentsin in Anhui (gxfxZD2016013)
the HIRP program of Huawei technology
Article History
First Online: 18 May 2018