Chien-Hsing Chou This email address is being protected from spambots. You need JavaScript enabled to view it.¹, Mu-Chun Su² , Yu-Xiang Zhao³ and Fu-Hau Hsu²

¹Department of Electrical Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.
²Department of Computer Science & Information Engineering, National Central University, Taoyuan, Taiwan 320, R.O.C.
³Department of Computer Science & Information Engineering, National Quemoy University, Kinmen, Taiwan 892, R.O.C.

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