supported by the National Natural Science Foundation of China(No.30970353);the Key Laboratory Project of Department of Education of Liaoning Province;China(No.LS2010095);the College Students' Innovative Project of Educational Department;Liaoning Province;China(No.CSXL201210165007)
supported by the National Natural Science Foundation of China (No. 30970353);International Science and Technology Cooperation Projects of Ministry of Science and Technology;China (No. 2010DFR30850)