1. University of Quebec,Dept. of Elect. Engineering,Trois-Rivières,QC,Canada
2. University of Douala,Dept. of Elect. Engineering,Douala, LT,Cameroon
3. Paderborn University,Power Electronics/Electrical Drives,Paderborn,Germany
4. University of Fuzhou,Dept. of Elect. Engineering,Fuzhou,China