1. Department of Computer and Information Science; R. O. C. Military Academy; Feng-Shan District Kaohsiung 830 Taiwan
2. Department of Electrical Engineering; R. O. C. Military Academy; Feng-Shan District Kaohsiung 830 Taiwan
3. Department of Computer Science and Information Engineering; Southern Taiwan University of Science and Technology; Yung-Kang District Tainan 710 Taiwan