1. College
of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, P. R. China
2. NAAM
Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
3. Department
of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan
4. Collaborative
Innovation Center of Radiation Medicine of Jiangsu Higher Education
Institutions, School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, P. R. China