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Keywords: [长尾分布, 冷门商品, 推荐权重, 相似关系, 不信任关系约束, long tail distribution, unpopular goods, weight of recommendation, similarity relationship, constraint of distrust relationship]
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由于在线商品销售的长尾效应,冷门商品的总销量非常巨大,因而对..
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