1. Dept. of Engineering Mechanics, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province; Zhejiang University; Hangzhou 310027 China
2. Dept. of Chemical Engineering; University of Florida; Gainesville FL 32611
3. School of Mechanical Engineering; Purdue University; West Lafayette IN 47907
4. Worldwide Research and Development; Pfizer, Inc.; Groton CT 06340
5. College of Engineering; University of California; Davis CA 95616