1. Shanghai Jiao Tong University, and Key Laboratory of Shanghai Education Commission for Intelligent Interaction and Cognitive Engineering,Department of Computer Science and Engineering,Shanghai,China,200240
2. Shanghai Jiao Tong University, and Key Laboratory of System Control and Information Processing, Ministry of Education of China,Institute of Image Processing and Pattern Recognition,Shanghai,China,200240
3. Carnegie Mellon University,School of Computer Science,Computational Biology Department,Pittsburgh,PA,USA,15213