National Natural Science Foundation of China(10647002);Guangxi Natural Science Foundation for Young Researchers(0991009);Foundation of Guangxi Education Department(200807MS112);Department of Science and Technology of Guangxi(2011GXNSFA018140)~~
supported by the National Natural Science Foundation of China(Grants 10535010,10675090,and 10775068);the 973 National Major State Basic Research and Development of China (Grant 2007CB815004);CAS Knowledge Innovation Project KJCX2 -SW-N02;the Research Fund of Doctoral Point(RFDP), No .20070284016