【NLP】LSA(Latent Semantic Analysis-潜在语义分析)

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【NLP】LSA(Latent Semantic Analysis:潜在语义分析)

LSA是基于co-occurance matrix的

步骤

1.计算courpus中出现的词的集合
2.创建co-occurance matrix
3.计算co-occurance矩阵
4.SVD降维。得到词向量

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