作者机构:[1]School of Electronics and Information Engineering, Tianjin University, Tianjin 300072, China
相关基金:Project supported by the National Natural Science Foundation of China (Grant Nos. 60771019 and 60801018), Tianjin Research Program of Application Foundation and Advanced Technology, China (Grant No. llJCZDJC15300), Tianjin Natural Science Foundation, China (Grant No. 09JCYBJC01100), and the New Teacher Foundation of Ministry of Education, China (Grant No. 200800561109).