Copyright @2012, Department of Computer Science and Information Engineering, (E building, 5F.) Jinwen University of Science and Technology No.99, Anzhong Rd., Xindian Dist., New Taipei City 23154, Taiwan. ,R.O.C e-mail: csiedep@just.edu.tw web site: www.csie.just.edu.tw Tel: +886(02)8212-2000#2830 Fax: +886(02)8212-2801