基金Supported by National Natural Science Foundation of China(60574011)
Acknowledgement The authors would like to thank Professor YANG Guang-Hong for his guidance.
基金National Natural Science Foundation of P. R. China (60084002 and 60174018) National Key Project for Basic Research of P. R. China ( G2002cb312205) +1 种基金 National Excellent Doctoral Dissertation Foundation of P. R.China (200041) and National Natural Sci