Hsin-Hung Chiang¹, Wei-Ming Chen This email address is being protected from spambots. You need JavaScript enabled to view it.², Chiou-Shan Chou² and Han-Chieh Chao^1,2

¹Department of Electrical Engineering, National Dong Hwa University, Hualien, Taiwan 974, R.O.C.
²Institute of Computer Science and Information Engineering, National Ilan University, Yilan, Taiwan 260, R.O.C.

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