North China University of Science and Technology,
21 Bohai Road, Caofeidian, Tangshan, Hebei 063210, P. R. China
Professor in College of Informatics, Huazhong Agricultural University,
No. 1 Shizishan St., Wuhan, Hubei 430070, P. R. China
Xiao-Ming Song Email: songxiaoming116@163.com
Qing-Yong Yang Email: yqy@mail.hzau.edu.cn
