Niu, Xiaoli
Hu, Tiantian
Zhang, Fucang
Feng, Puyu
Funding for this research was provided by:
National Natural Science Foundation of China (51079124)
National High Technology Research and Development Program of China (2011AA100504)
Fundamental Research Funds for the Central Universities of China (QN2011067)
Technology Foundation for Selected Overseas Chinese Scholar of Shaanxi