1. International Engineering College, Xi'an University of Technology , NO. 58 Yanxiang Road, Xi'an 710054 , China
2. Department of Applied Mathematics, Xi'an University of Technology , NO.58 Yanxiang Road, Xi'an 710054 , China
3. School of Computer Science and Engineering, Xi'an University of Technology , NO.5 South Jinhua Road, Xi'an 710048 , China
4. Department of Mathematics, University of Sargodha , Sargodha 40100 , Pakistan