1. College of Computer Science and Engineering, Northeastern University, Shenyang, China
2. College of Computer Science and Engineering and the State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang, China
3. College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
4. School of Computing and Communications, Lancaster University, Lancaster, U.K
5. School of Information Science and Engineering, Shenyang University of Technology, Shenyang, China
6. Distributed Systems Group, TU Wien, Wien, Austria