Affiliation: | 1. School of Mechanical Engineering and Automation, P.O. Box 319, Northeastern University, No. 11 Lane 3, Wenhua Rd, Heping District, Shenyang 110819, Liaoning Province, PR China;2. Department of Mechanical and Biofunctional Systems, Institute of Industrial Science, The University of Tokyo, Komaba 4-6-1, Meguro, Tokyo 153-8505, Japan |