supported by the National Natural Science Foundation of China(61170309;61202098;91130024);the Key Project of Development Foundation of Science and Technology of CAEP(2011A0202012: 2012A0202008);the Foundation of National Key Laboratory of Computational Physics
the National Natural Science Foundation of China(granted No.10571017,10701015,60373015 and 60533020);National Basic Research Program of China(granted No.2005CB221300)