作者机构:[1]Beijing Research Center for Information Technology in Agriculture, Beijing 100097, P.R.China, [2]Information Engineering Institute, Capital Normal University, Beijing 100048, P.R. China, [3]Chengdu Dawan High School, Chengdu 610300, P.R.China
相关基金:supported by the National Natural Science Foundation of China (40701120); the Beijing Natural Science Foundation, China (4092016); the Beijing Nova, China (2008B33)