About the Authors
- Heng Liu
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* E-mail: liuheng@mail.dlut.edu.cn
Affiliation Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, China
- Xingyuan Wang
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Affiliation Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, China
- Guozhen Tan
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Affiliation Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, China
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: LH. Performed the experiments: LH WX. Analyzed the data: LH TG. Contributed reagents/materials/analysis tools: LH. Wrote the paper: LH.