Xiaohong Guan received the B.S. and M.S. degrees in control engineering from Tsinghua University, Beijing, China in 1982 and 1985 respectively, and Ph.D. degree in electrical engineering from University of Connecticut in 1993. He was a Senior Consulting Engineer with PG&E from 1993 to 1995. He visited the Division of Engineering and Applied Science, Harvard University, Cambridge, MA, from January 1999 to February 2000.