Institution: | 1. School of Mathematics and Statistics, Shandong Normal University, Ji’nan 250014, PR China;2. Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, and Institute of Data Science and Technology, Shandong Normal University, Ji’nan 250014, PR China;3. School of Mathematics, and Research Center for Complex Systems and Network Sciences, Southeast University, Nanjing 210096, PR China |