Supported by National Natural Science Foundation of China 81371174,Natural Science Foundation of Fujian Province 2012J01345 and Key Project of Production,Teaching and Research of Department of Science and Technology of Fujian Province 2011Y4001.国家自然科学基金81371174;福建省自然科学基金2012J01345;福建省科技厅产学研重大项目2011Y4001