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基于主题情感混合模型的无监督文本情感分析
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基于主题情感混合模型的无监督文本情感分析. 汇报人:周学广 教授. 主要内容. 一. LDA 模型. 二. UTSU 模型. 三. 实验对比与分析. LDA 模型. VSM 模型. VSM : Vector Space Model. LSA 模型. LSA :Latent Semantic Analysis. pLSA 模型. pLSA :Probabilistic Latent Semantic Analysis. LDA 模型. LDA :Latent Dirichlet Allocation. 情感分类方法. 有监督的机器学习方法
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基于主题情感混合模型的无监督文本情感分析
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基于主题情感混合模型的无监督文本情感分析 汇报人:周学广 教授
主要内容 一 LDA模型 二 UTSU模型 三 实验对比与分析
VSM模型 VSM:Vector Space Model
LSA模型 LSA :Latent Semantic Analysis
pLSA模型 pLSA :Probabilistic Latent Semantic Analysis
LDA模型 LDA :Latent Dirichlet Allocation
情感分类方法 有监督的机器学习方法 无监督的机器学习方法
UTSU模型 UTSU :Unsupervised topic-sentiment unification model
UTSU模型 给定所有参数,UTSU模型所有潜在变量和可观察变量的联合概率为: 其中,Nds表示文档内的句子数,Ns表示句子s内的词数。
UTSU模型求解 文档~主题分布 文档~情感分布 主题情感~词分布
实验结果与分析 数据集
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