Funding for this research was provided by:
Research Foundation of Science and Technology Bureau of Shaanxi, China (2015SZS-15-05)
the China Scholarship Council (CSC) Foundation (201608615024)
Collaborative innovation center Research Foundation (QBXT-Z(P)-15-28)
Special Scientists’ Foundations of Shaanxi University of Technology (SLGKYQD2014-2-18)