实验数据 FM https://www.yelp.com/dataset_challenge http://www.dtic.upf.edu/~ocelma/MusicRecommendationDataset/lastfm-1K.html https://webscope.sandbox.yahoo.com/catalog.php?datatype=r 关系网络 https://snap.stanford.edu/data/ https://linqs.soe.ucsc.edu/data