Porovnat metody
Prohlédněte si vybrané metody vedle sebe; řádky, které se liší, jsou zvýrazněny.
| Jemně doladěný tematický model LDA× | Model témat NMF× | |
|---|---|---|
| Obor | Hluboké učení | Hluboké učení |
| Rodina | Machine learning | Machine learning |
| Rok vzniku≠ | 2003 (base); adaptation practice ~2010s | 1999 |
| Tvůrce≠ | Blei, D. M., Ng, A. Y., & Jordan, M. I. (base LDA); domain adaptation via online/warm-start LDA | Lee, D. D. & Seung, H. S. |
| Typ≠ | Probabilistic generative topic model (fine-tuned / domain-adapted) | Matrix factorization / unsupervised topic model |
| Původní zdroj≠ | Blei, D. M., Ng, A. Y., & Jordan, M. I. (2003). Latent Dirichlet Allocation. Journal of Machine Learning Research, 3, 993–1022. link ↗ | Lee, D. D., & Seung, H. S. (1999). Learning the parts of objects by non-negative matrix factorization. Nature, 401(6755), 788–791. DOI ↗ |
| Další názvy | Domain-Adapted LDA, Adapted LDA, LDA Fine-Tuning, Online LDA Fine-Tuning | NMF, Non-negative Matrix Factorization, NMF for Topic Modeling, NNMF Topic Model |
| Příbuzné≠ | 5 | 4 |
| Shrnutí≠ | Fine-Tuned LDA adapts a Latent Dirichlet Allocation model trained on a large general corpus to a specific target domain by continuing inference on domain-specific documents. Rather than fitting LDA from scratch, the pre-trained topic-word distributions are used as an informed starting point, enabling the model to discover coherent domain topics faster and with less data than training cold. | Non-negative Matrix Factorization (NMF) is an unsupervised matrix decomposition method that discovers latent topics in a text corpus by factoring a document-term matrix into two non-negative matrices — one encoding topic-word weights, the other document-topic weights. The non-negativity constraint yields parts-based, additive representations that tend to produce clean, interpretable topics. |
| ScholarGateDatová sada ↗ |
|
|