常用free文献数据库
papers with code https://paperswithcode.com/task/automatic-sleep-stage-classification/codeless
semanticscholar https://www.semanticscholar.org/paper/Sleep-Stage-Classification-using-Wavelet-Transform-Oropesa-Cycon/0029490cd57b78d3c752a087f3a9a5b8b3c10233
https://www.sohu.com/a/237502733_358040