1. College of Computer, National University of Defense Technology, Changsha 410073, China
2. Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China
3. School of Computer Science and Technology, Tianjin University, Tianjin 300350, China
4. BGI Genomics, BGI-Shenzhen, Shenzhen 518083, China
5. College of Computer Science and Electronic Engineering & National Supercomputer Centre in Changsha, Hunan University, Changsha 410082, China