基金supported by the National Natural Science Foundation of China(21073143)“Chunhui Project”from the Ministry of Education of China(Z2009-1-71002,Z2009-1-71006)+2 种基金Graduate Starting Seed Fund of Northwestern Polytechnical University(NPU),China(Z2015152)NPU Foundation for Graduate InnovationChina~~
基金the National Natural Science Foundation of China (20471027) for the financialaid to this researchChina Postdoctoral Research Fund (1107040063)supported by Nanjing University Graduate Students Innovation Funding(2006CL09)~~