COVID-19-paper-classification 问题来源: https://biocreative.bioinformatics.udel.edu/tasks/biocreative-vii/track-5/ 多标签文本分类 数据: https://ftp.ncbi.nlm.nih.gov/pub/lu/LitCovid/topic_tagger/ 多个feature,8个label,数据不均衡 模型