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基于目标用户近邻修正的协同过滤算法*

DOI: 10.16451/j.cnki.issn1003-6059.201509005, PP. 802-810

Keywords: 协同过滤,用户群体,倾向性,稀疏性

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Abstract:

在基于用户的协同过滤算法中,用户评分倾向性和评分矩阵的稀疏性致使难以准确可靠地搜寻目标用户的近邻.基于此,文中提出基于目标用户近邻修正的协同过滤算法.首先定义积极评分和消极评分两类用户群体,选择从目标用户评分倾向性一致的用户群体中寻找其近邻.然后对与目标用户共同评分项数量少而相似度可能高的近邻进行修正,为目标用户寻找更准确的近邻集合.实验表明,文中算法在一定程度上能有效提高推荐质量.

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