About the Authors

Shanshan Yang

Affiliation School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China

Fang Zheng

Affiliation School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China

Xin Luo

Affiliation School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China

Suxian Cai

Affiliation School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China

Yunfeng Wu

y.wu@ieee.org

Affiliation School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China

Kaizhi Liu

Affiliation School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China

Meihong Wu

Affiliation School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China

Jian Chen

Affiliation Department of Rehabilitation, Zhongshan Hospital Xiamen University, Xiamen, Fujian, China

Sridhar Krishnan

Affiliation Department of Electrical and Computer Engineering, Ryerson University, Toronto, Ontario, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YW. Performed the experiments: SY FZ XL SC KL YW. Analyzed the data: SY SC YW MW JC. Contributed reagents/materials/analysis tools: XL YW SK. Wrote the paper: YW SY SC.