1. Tennessee Technological University,Department of Electrical and Computer Engineering,Cookeville,TN,USA,38505
2. National Institute of Standards and Technology (NIST),Mechanical Systems and Controls Group in the Building Energy and Environment Division,Gaithersburg,MD,USA,20899
3. University of Virginia,Charles L. Brown Department of Electrical and Computer Engineering,Charlottesville,VA,USA,22904-4743