1. Center for Energy and Environmental Resources, University of Texas at Austin, 10100 Burnet Road, Austin, Texas 78758, United States
2. Process Profiles, P.O. Box 8264, Calabasas, California 91372, United States
3. NICE America Research, 2091 Stierlin Ct., Mountain View, California 94043, United States
4. National Institute of Clean-and-Low-Carbon Energy, Future Science and Technology City, Changping District, P.O. Box 001, Beijing 102209, P. R. China