השוואת שיטות

	מודל נושאים NMF חצי-מפוקח	מודל נושאים LDA מונחה-למחצה
תחום	למידה עמוקה	למידה עמוקה
משפחה	Machine learning	Machine learning
שנת המקור	2001 (NMF); semi-supervised variants from ~2010s	2009
הוגה השיטה	Lee & Seung (NMF); semi-supervised extensions by Jagarlamudi et al. and others	Ramage, D.; Andrzejewski, D. et al.
סוג	Matrix factorization with supervision	Semi-supervised probabilistic topic model
מקור מכונן	Lee, D. D., & Seung, H. S. (2001). Algorithms for non-negative matrix factorization. Advances in Neural Information Processing Systems, 13, 556–562.	Ramage, D., Hall, D., Nallapati, R., & Manning, C. D. (2009). Labeled LDA: A supervised topic model for credit attribution in multi-labeled corpora. Proceedings of EMNLP, 248–256.
כינויים	SS-NMF, guided NMF, constrained NMF topic model, seed-guided NMF	Labeled LDA, Seeded LDA, Constrained LDA, SS-LDA
קשורות	6	6
תקציר	Semi-supervised Non-negative Matrix Factorization (NMF) Topic Model extends unsupervised NMF by incorporating user-provided seed words or label constraints to steer discovered topics toward domain-relevant themes. It factorizes a document-term matrix into interpretable non-negative components while respecting lexical priors, yielding coherent, application-aligned topics even from modest corpora.	Semi-supervised LDA extends standard Latent Dirichlet Allocation by incorporating a small amount of supervision — seed words, labeled documents, or must-link/cannot-link word constraints — to guide topic discovery toward semantically coherent, interpretable themes. It bridges unsupervised topic modeling and fully supervised text classification, making it especially valuable when full annotation is costly.