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HomeDatabaseMysql TutorialCOM:一种面向群推荐的生成模型

COM:一种面向群推荐的生成模型

Jun 07, 2016 pm 02:50 PM
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摘要 引言 相关工作 推荐系统 群推荐 一致性模型 问题描述 面向群推荐的一致性模型COnsensus Model for Group Recommendation 参数估计 推荐 内容信息融合 实验 实验设置 数据集 评价指标 推荐方法 实验结果 产品选择中主题的权重 主题分析 结论 摘要 引言

    • 摘要
    • 引言
    • 相关工作
      • 推荐系统
      • 群推荐
    • 一致性模型
      • 问题描述
      • 面向群推荐的一致性模型COnsensus Model for Group Recommendation
      • 参数估计
      • 推荐
      • 内容信息融合
    • 实验
      • 实验设置
        • 数据集
        • 评价指标
        • 推荐方法
      • 实验结果
      • 产品选择中主题的权重
      • 主题分析
    • 结论

摘要

引言

相关工作

推荐系统

群推荐

一致性模型

问题描述

面向群推荐的一致性模型(COnsensus Model for Group Recommendation)

参数估计

推荐

  在向一个目标群gt进行推荐时,我们首先基于群体成员ugt发现群的主题分布。这个分布θgt可以通过对ugt根据如下公式进行吉布斯抽样学习到:
P(zj=k|z,uj=v,uj)?^ZUk,v(nGZgt,k,j+αk)(12)
  在向群推荐产品时我们应该去匹配群的主题分布θgt,根据 生成模型,我们定义候选产品i的推荐得分如下:
P(i,|ugt,θgt)?uugtzZθgt,z??^ZUz,u(λ^u??^ZIz,i+(1?λ^u)??^UIu,i)(13)
  式(13)嵌入了直觉(4)的想法(当选择产品时,群体中不同用户有着不同的影响力得分, 而这个影响力是取决于主题的):如果主题z更与群gt相关,用户uz上面的专家,那么用户u在产品选择时会更有影响力。用户u在主题z上面的知识用?ZUz,u来表示。在式(13)中,θgt,z??ZUz,u是给定主题z用户u在群体gt上的影响力得分。而λu??ZIz,i+(1?λ

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