1. General Administration of Sport of China. Second National physical fitness monitoring report. People's Physical Culture Publishing House, 2007.
2. http://old.moe.gov.cn//publicfiles/business/htmlfiles/moe/s3273/201407/171692.html.
3. Internet of things and big data analytics for smart and connected communities;Sun;IEEE Access,2016
4. Constructing the web of events from raw data in the web of things;Sun;Mob. Inf. Syst.,2014
5. Acousticcardiogram: monitoring heartbeats using acoustic signals on smart devices;Qian,2018