1. Senior Lecturer, Dept. of Mechanical Precision Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia International Campus, Jalan Semarak, 54100 Kuala Lumpur, Malaysia (corresponding author).
2. Chair Professor, Dept. of Mechanical Engineering, National Taiwan Univ. of Science and Technology, Taipei 10672, Taiwan, R.O.C.
3. Graduate student, Dept. of Mechanical Engineering, National Taiwan Univ. of Science and Technology, Taipei 10672, Taiwan, R.O.C.
4. Associate Professor, Dept. of Mechanical Engineering, National Taiwan Univ. of Science and Technology, Taipei 10672, Taiwan, R.O.C.