1. National Taiwan University of Science and Technology,Department of Electrical Engineering,Taipei,Taiwan, ROC
2. University of Jember,Department of Electrical Engineering,Jember,Indonesia
3. National Kaohsiung University of Science and Technology,Department of Electrical Engineering,Kaohsiung,Taiwan, ROC
4. Universitas Gajah Mada,Departtment of System Engineering,Yogyakarta,Indonesia