1. Department of Mechanical and Aerospace Engineering, The George Washington University, 800 22nd St., NW, Washington, DC 20052, USA
2. School of Energy and Power Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei St., Nanjing 210094, People's Republic of China
3. Bridge 12 Technologies, Inc., 37 Loring Dr., Framingham, Massachusetts 01702, USA