About the Authors

Yanqing Zhang

Affiliation Department of Mathematics, Inner Mongolia University of Technology, Hohhot, China

Xueying Liu

liuxy@imut.edu.cn

Affiliation Department of Mathematics, Inner Mongolia University of Technology, Hohhot, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XYL. Performed the experiments: YQZ. Analyzed the data: YQZ XYL. Contributed reagents/materials/analysis tools: YQZ. Wrote the paper: YQZ.