Department of Computer Science and Engineering, Yuan Ze University, Chung-Li, Taiwan, ROC. cmhsu@saturn.yzu.edu.tw|Department of Computer Science and Engineering, Yuan Ze University, Chung-Li, Taiwan, ROC. cmhsu@saturn.yzu.edu.tw|Department of Computer Science and Engineering, Yuan Ze University, Chung-Li, Taiwan, ROC. cmhsu@saturn.yzu.edu.tw|Department of Computer Science and Engineering, Yuan Ze University, Chung-Li, Taiwan, ROC. cmhsu@saturn.yzu.edu.tw|Department of Computer Science and Engineering, Yuan Ze University, Chung-Li, Taiwan, ROC. cmhsu@saturn.yzu.edu.tw|Department of Computer Science and Engineering, Yuan Ze University, Chung-Li, Taiwan, ROC. cmhsu@saturn.yzu.edu.tw|Department of Computer Science and Engineering, Yuan Ze University, Chung-Li, Taiwan, ROC. cmhsu@saturn.yzu.edu.tw