Affiliation: | 1. State Key Laboratory for Geomechanics and Deep Underground Engineering, Department of Mathematics, China University of Mining and Technology, Xuzhou, 221116, P.R. China 2. College of Mathematics and Information, Ludong University, Yantai, 264025, P.R. China 3. College of Science, Linyi University, Linyi, 276005, P.R. China 4. College of Mathematics and System Sciences, Shandong University of Science and Technology, Qingdao, 266510, P.R. China
|