Supported by the Eleventh Five-year Plan for Supporting Science and Technology of China(No. 2006BAC01A13);National Natural Science Foundation of China(No.30770412)
the scientific and technological program of Fujian Science and Technology Department(2004N026);the Natural Science Foundation of Fujian Province(B0410009);the scientific and technological program of undergraduate students in Fujian Normal university(BKL2007062)