1. Kani Chen is Professor, Department of Mathematics, HKUST, Kowloon, Hong Kong, China . Shaojun Guo is Assistant Professor, Institute of Applied Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, P. R. China . Yuanyuan Lin is Ph.D. Candidate, Department of Mathematics, HKUST, Kowloon, Hong Kong, China . Zhiliang Ying is Professor, Department of Statistics, Columbia University, New York, NY 10027 . Yuanyuan Lin is the corresponding author. The research of...