1. School of Information Science and Technology, Southwest Jiaotong University Chengdu China
2. School of Software Engineering Chengdu University of Information Technology Chengdu China
3. School of Energy Power and Mechanical Engineering North China Electric Power University Baoding China
4. Digital Media Art, Key Laboratory of Sichuan Province Sichuan Conservatory of Music Chengdu China
5. Department of Computer Science Rensselaer Polytechnic Institute New York New York USA