1. Amirkabir University of Technology,Department of Electrical Engineering,Tehran,Iran
2. Natural Resources Canada,CanmetENERGY Research Centre,Ottawa,Canada
3. K. N. Toosi University of Technology,Department of Electrical Engineering,Tehran,Iran
4. Georgia Institute of Technology,Dept. of Electrical and Computer Engineering,Atlanta,GA,USA
5. University of Houston,Dept. of Electrical and Computer Engineering,Houston,TX,USA,77004