Compară metode
Examinează metodele selectate una lângă alta; rândurile care diferă sunt evidențiate.
| Inferență Variațională Multilevel× | Inferența variațională× | |
|---|---|---|
| Domeniu | Bayesian | Bayesian |
| Familie | Bayesian methods | Bayesian methods |
| Anul apariției≠ | 2016 | 1999 |
| Autorul original≠ | Ranganath, Altosaar, Tran, Blei (hierarchical VI formalization, 2016); Blei et al. (VI framework, 2017) | Jordan, Ghahramani, Jaakkola & Saul |
| Tip | approximate Bayesian inference | Approximate Bayesian inference |
| Sursa seminală≠ | Blei, D. M., Kucukelbir, A., & McAuliffe, J. D. (2017). Variational inference: A review for statisticians. Journal of the American Statistical Association, 112(518), 859-877. DOI ↗ | Jordan, M. I., Ghahramani, Z., Jaakkola, T. S., & Saul, L. K. (1999). An introduction to variational methods for graphical models. Machine Learning, 37(2), 183–233. DOI ↗ |
| Denumiri alternative≠ | hierarchical variational inference, multilevel VI, variational Bayes for multilevel models, MLVI | VI, variational Bayes, VB, mean-field variational inference |
| Înrudite | 4 | 4 |
| Rezumat≠ | Multilevel variational inference (MLVI) is a scalable approximate Bayesian method that fits hierarchical (multilevel) models by optimizing a variational approximation to the posterior, rather than drawing MCMC samples. It exploits the grouped structure of multilevel data — individuals nested within groups, groups nested within higher-level units — to derive efficient coordinate-wise updates, making Bayesian inference tractable for large clustered datasets. | Variational inference (VI) is a family of techniques that turn Bayesian posterior computation into an optimisation problem. Instead of drawing samples from the exact posterior — as Markov chain Monte Carlo does — VI posits a simpler, tractable family of distributions and finds the member of that family closest to the true posterior by maximising the evidence lower bound (ELBO). Introduced in its modern graphical-model form by Jordan, Ghahramani, Jaakkola and Saul (1999) and given a comprehensive statistical treatment by Blei, Kucukelbir and McAuliffe (2017), VI is now the standard scalable inference engine in probabilistic machine learning. |
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