| Affiliation: | 1. Department of Mathematics, Harbin Institute of Technology, Harbin 15001, PR China;2. College of Information Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China;1. Department of Mathematics, Kunming University of Science and Technology, Kunming, Yunnan 650500, PR China;2. School of Mathematics and Statistics, Yunnan University, Kunming 650091, PR China;1. School of Sciences, Zhejiang A&F University, Lin’an, Zhejiang 311300, PR China;2. School of Environmental & Resources, Zhejiang A&F University, Lin’an, Zhejiang 311300, PR China |
