Σύγκριση μεθόδων

	Εκχώρηση Δεσμευμένων Dirichlet (LDA)	Συσταδοποίηση K-Means	Word2Vec
Πεδίο	Μηχανική Μάθηση	Μηχανική Μάθηση	Εξόρυξη Κειμένου
Οικογένεια	Latent structure	Machine learning	Process / pipeline
Έτος προέλευσης	2003	1967	2013
Δημιουργός	Blei, D. M.; Ng, A. Y.; Jordan, M. I.	MacQueen, J.	Tomas Mikolov et al.
Τύπος	Generative probabilistic topic model (three-level hierarchical Bayesian)	Partitional clustering (centroid-based)	Neural word-embedding model
Θεμελιώδης πηγή	Blei, D. M., Ng, A. Y., & Jordan, M. I. (2003). Latent Dirichlet allocation. Journal of Machine Learning Research, 3, 993–1022.	MacQueen, J. (1967). Some Methods for Classification and Analysis of Multivariate Observations. Proceedings of the 5th Berkeley Symposium on Mathematical Statistics and Probability, 1, 281–297.	Mikolov, T., Chen, K., Corrado, G. & Dean, J. (2013). Efficient Estimation of Word Representations in Vector Space.
Εναλλακτικές ονομασίες	LDA, topic model, Blei-Ng-Jordan model, probabilistic topic modeling	K-Ortalamalar Kümeleme, k-ortalamalar kümeleme, k-means, centroid clustering	word embeddings, skip-gram, continuous bag-of-words, Word2Vec Kelime Gömülmeleri
Συναφείς	3	3	4
Σύνοψη	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.	K-Means Clustering is a centroid-based partitional clustering algorithm, traced to J. MacQueen in 1967, that splits data into k clusters by assigning each observation to its nearest cluster centre. It is widely used for marketing segmentation, customer grouping, and exploratory analysis.	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.