[Chien, Wei-Che; Lai, Chin-Feng; Weng, Hung-Yen] Natl Cheng Kung Univ, Dept Engn Sci, Tainan 701, Taiwan.
[Fan, Zhang] Wuhan Polytech Univ, Sch Math & Comp Sci, Wuhan, Hubei, Peoples R China.
[Chao, Han-Chieh] Natl Dong Hwa Univ, Dept Elect Engn, Hualien 974, Taiwan.
[Chao, Han-Chieh] Natl Ilan Univ, Dept Comp Sci & Informat Engn, Yilan 260, Taiwan.
[Chao, Han-Chieh] Natl Ilan Univ, Dept Elect Engn, Yilan 260, Taiwan.