作者机构:[1]Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China, [2]School of Mathematics and Statistics, Huazhong Normal University, Wuhan 430079, Hubei, China
相关基金:Foundation item: Supported by the National Natural Science Foundation of China (10671081)
Biography: FAN Qiong, female, Ph.D. c ndidate, Lecturer of Huazhong Normal University, research direction: graph theory. E-mail:xfanqiong@mail. ccnu.edu.cn
To whom correspondence should be addressed. E-mail:qihuan@mail.hust.edu.cn