1. Key College of Mathematical Science, Bohai University, Jinzhou 121013, P. R. China
2. College of Physical Science and Technology, Bohai University, Jinzhou 121013, P. R. China
3. Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, 430070, P. R. China
4. Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao-Tung University, Hsinchu 30010, Taiwan