1. Department of Business Administration Overseas Chinese University Taichung Taiwan, ROC
2. Department of Mathematics and Statistics University of Victoria Victoria British Columbia Canada
3. Department of Medical Research, China Medical University Hospital China Medical University Taichung Taiwan, ROC
4. Department of Mathematics and Informatics Azerbaijan University Baku Azerbaijan
5. Section of Mathematics International Telematic University Uninettuno Rome Italy
6. Department of Business Administration National Chinlee University of Technology Taichung Taiwan, ROC
7. Department of Mechanical and Industrial Engineering Louisiana State University Baton Rouge Louisiana USA
8. Department of Applied Mathematics Chung Yuan Christian University Chung‐Li Taiwan, ROC