关键词: 兴趣子类 兴趣分类树 协作推荐 数据稀疏性 平均绝对误差 推荐算法 用户兴趣 子类处理 协作 用户数据 稀疏性 电子商务 传统 相似

Abstract: With the development of E-commerce, the magnitudes of users and Web documents grow rapidly, and result in the extreme data sparseness of users. The traditional algorithms of collaborative recommendation can＇t solve the problem very well. To address this i

Key words: Interest sub-class, Interest category tree, Collaborative recommendation, Data sparseness, Mean Absolute Error（MAE）