About the Authors

Wenjuan Wei

Affiliation Department of Building Science, Tsinghua University, Beijing, China

Jianyin Xiong

Affiliation School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China

Yinping Zhang

zhangyp@tsinghua.edu.cn

Affiliation Department of Building Science, Tsinghua University, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WW JX YZ. Performed the experiments: WW. Analyzed the data: WW JX. Contributed reagents/materials/analysis tools: WW JX. Wrote the paper: WW JX YZ.