1. Center for Post-Doctoral Studies of Computer Science and Technology, Harbin University of Science and Technology, Harbin, Heilongjiang, China;
2. College of Computer and Information Engineering, Harbin University of Commerce, Harbin, Heilongjiang, China;
3. College of Energy and Architectural Engineering, Harbin University of Commerce, Harbin, Heilongjiang, China;
4. College of Automation, Harbin Engineering University, Harbin, Heilongjiang, China