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select p1.username as username1, p2.username as username2, p1.urlfrom post p1, post p2where p1.url=p2.urland p1.username <>p2.username) t.select title,url from post where username in (select top 10 username2 from relateduserwhere username1 = ''jiangtao'' and commoncount >=10order by coeff desc... 阅382 转0 评0 公众公开 09-02-03 14:51 |
Jaccard’s Coefficient.Jaccard''s coefficient (measure similarity) and Jaccard''s distance (measure dissimilarity) are measurement of asymmetric information on binary (and non-binary) variables.Compare Jaccard''s coefficient with Simple matching coefficient.Jaccard''s coefficient remove... 阅1006 转5 评1 公众公开 09-01-21 17:44 |
文本相似度计算--余弦定理和广义Jaccard系数 - 搜索引擎研究 - 19楼空间文本相似度计算--余弦定理和广义Jaccard系数 在7.9余弦定理+空间向量--我的数学3 中简单地说了一下利用余弦定理来计算文本相似度。下面是利用余弦定理和广义Jaccard系数来计算文本相似度。简单介绍一下Jaccard系数:广义Jaccard系数可以用于文档数据，并在二元属性情况下归... 阅1922 转4 评0 公众公开 09-01-21 17:36 |
