手法を比較

	潜在的ディリクレ配分法 (LDA)	Word2Vec
分野	機械学習	テキストマイニング
系統	Latent structure	Process / pipeline
提唱年	2003	2013
提唱者	Blei, D. M.; Ng, A. Y.; Jordan, M. I.	Tomas Mikolov et al.
種類	Generative probabilistic topic model (three-level hierarchical Bayesian)	Neural word-embedding model
原典	Blei, D. M., Ng, A. Y., & Jordan, M. I. (2003). Latent Dirichlet allocation. Journal of Machine Learning Research, 3, 993–1022.	Mikolov, T., Chen, K., Corrado, G. & Dean, J. (2013). Efficient Estimation of Word Representations in Vector Space.
別名	LDA, topic model, Blei-Ng-Jordan model, probabilistic topic modeling	word embeddings, skip-gram, continuous bag-of-words, Word2Vec Kelime Gömülmeleri
関連	3	4
概要	Latent Dirichlet Allocation (LDA) is a generative probabilistic model for collections of discrete data, introduced by Blei, Ng, and Jordan in 2003. It treats each document as a mixture of latent topics and each topic as a probability distribution over words, enabling unsupervised discovery of thematic structure across large text corpora. It is one of the most cited papers in machine learning and natural language processing.	Word2Vec is a neural word-embedding technique introduced by Mikolov and colleagues in 2013 that maps each word in a text corpus to a dense numeric vector. Words that appear in similar contexts end up close together in the vector space, so the embeddings capture semantic similarity that can be measured arithmetically.