1. Department of Intelligent Commerce, National Kaohsiung University of Science and Technology, Kaohsiung 824004, Taiwan
2. Department of Electrical Engineering, Cheng Shiu University, Kaohsiung 83347, Taiwan
3. Department of Computer, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran
4. Department of Mathematics and Statistics, University of Neyshabur, Neyshabur, Iran