1. Department of Mathematics and Physics, Anhui Xinhua University, Hefei, PR China
2. Department of Gas Engineering, Ahwaz Faculty of Petroleum Engineering, Petroleum University of Technology (PUT), Ahwaz, Iran
3. Department of Industrial, Manufacturing and Systems Engineering, Texas Tech University, Lubbock, Texas, USA
4. Department of Chemical Engineering, Amirkabir University of Technology, Marvdasht, Iran
5. Chemical and Biomolecular Engineering Department, Ohio University, USA