1. Ph.D. Candidate, Dept. of Mechanical Engineering, Sharif Univ. of Technology, Azadai Ave., Tehran, Iran 11155-8639.
2. Assistant Professor, Dept. of Aerospace Engineering, Sharif Univ. of Technology, Azadai Ave., Tehran, P. O. Box 1115-8639, Iran 11155-8639.
3. Associate Professor, Dept. of Aerospace Engineering, Sharif Univ. of Technology, Azadai Ave., Tehran, P. O. Box 1115-8639, Iran 11155-8639 (corresponding author).