Shu-Han Liao¹, Min-Hui Ho¹, Rainfield Y. Yen This email address is being protected from spambots. You need JavaScript enabled to view it.¹ and Hong-Yu Liu²

¹Department of Electrical Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.
²Department of Electrical Engineering, Fu Jen Catholic University, Xinzhuang, Taiwan 242, R.O.C.

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