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平时积累的java代码

leetcode刷题

对数似然率相似度: 计算步骤如下: 计算行熵(rowEntropy),计算列熵(columnEntropy),计算矩阵熵(matrixEntropy) UserSimilarity=2∗(matrixEntropy−rowEntropy−columnEntropy)

redis缓存,解决mysql查询压力过大

SimHash的应用: 排重(两个01特征向量代表的样本,如果simHash值完全相同就判定两样本相同) 计算相似度(推荐系统,减少海量数据存储与计算)

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