Institution: | aAcademy of Mathematics and Systems Science, Chinese Academy of Science, Beijing 100080, PR China;bDepartment of Statistics and Actuarial Science, The University of Hong Kong, Pokfulam Road, Hong Kong;cDepartment of Statistics, East China Normal University, Shanghai, 200062, PR China;dDepartment of Mathematics, Shanxi Datong University, Datong, Shanxi, 037000, PR China |