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recommand system ----Item Based CF (Collaborative filtering)

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个性化用户推荐系统


* Personal Recommand System (Item-Based CF) *

* 用户推荐系统 *

1. 基于商品的协同过滤(Item-Based CF)
  • 基于商品Item-Based CF, 保证在数据稀疏性的情况下, 减小算法扩展性差的特点(如果仅基于用户的协同过滤 User-Based CF)
  • 调整的余弦相似度计算, 基于关联计算相似度similarity, 并添加系数调整因子factor
  • “加权求和”的预测打分值计算
  • TopK商品item推荐
  • 数据: 训练集80000,测试集20000
2. 模型结果

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recommand system ----Item Based CF (Collaborative filtering)

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