Wang, Chunping
Luo, Kun
Wang, Liming
Zhao, Huiyan
Zhang, Gaisheng
Funding for this research was provided by:
Talents Funds of Henan university of science and technology ((09001595))
The Key Scientific and Technological Innovation Special Projects of Shaanxi ((No.2007ZDKG-020))
Chinese National Programs for High Technology Research and Development ((2009AA101102))