1. The Chinese University of Hong Kong,Department of Information Engineering,Hong Kong
2. Harbin Institute of Technology,School of Electronics and Information Engineering,Shenzhen,China
3. The Chinese University of Hong Kong,School of Science and Engineering, Shenzhen Research Institute of Big Data,Shenzhen
4. Huawei Technology Co., Ltd.,the eLab of the Service & Software R&D Mgmt Dept
5. Huawei Technologies Co.,Ltd.,Service & software R&D,Algorithm Technology Department