"八桂学者"建设工程专项经费资助;广西自然科学基金创新研究团队项目2011GXNSFF018003;广西科学基金项目桂科基0832017,桂科自0848022;the Special Funding for Guangxi ' Bagui Scholars' Construction Projects Funds,the Guangxi Natural Science Fund Innovative Research Team Project2011GXNSFF018003;the Guangxi Science Fund Project0832017,0848022