Douban book

该数据集包含了从中国一个图书论坛收集的用户-物品评分数据以及用户之间的信任关系。为了确保数据质量，少于十次互动的样本被排除在外，并且在训练过程中采用了随机抽样的方法。这是一个大规模的数据集，主要任务包括评分预测和排名任务。

This dataset contains user-item rating data and user-user trust relationships collected from a Chinese book forum. To ensure data quality, samples with fewer than ten interactions were excluded, and random sampling was adopted during the training phase. This is a large-scale dataset, and its main tasks include rating prediction and ranking tasks.