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	Modello generativo basato sul gradiente (score-based)	Analisi delle Componenti Principali
Campo	Apprendimento profondo	Apprendimento automatico
Famiglia	Machine learning	Machine learning
Anno di origine	2019	2002
Ideatore	Song, Y. & Ermon, S.	Jolliffe, I.T. (textbook); Pearson & Hotelling (origins)
Tipo	Score-based generative model (SDE framework)	Unsupervised dimensionality reduction
Fonte seminale	Song, Y. & Ermon, S. (2019). Generative Modeling by Estimating Gradients of the Data Distribution. NeurIPS 32, 11895–11907.	Jolliffe, I.T. (2002). Principal Component Analysis (2nd ed.). Springer.
Alias	Skor Tabanlı Üretici Model (Score-Based / SDE), score-based diffusion, SDE-based generative model, score SDE	Temel Bileşenler Analizi (PCA), PCA, principal components analysis, Karhunen-Loève transform
Correlati	5	3
Sintesi	A score-based generative model, introduced by Yang Song and Stefano Ermon in 2019 and generalized to the stochastic differential equation (SDE) framework in 2021, learns the gradient of the data density — the score — rather than predicting noise directly, and uses it to generate new samples. It is the mathematical generalization that unifies diffusion models under a continuous-time formulation.	Principal Component Analysis (PCA) is an unsupervised dimensionality-reduction method — given its modern textbook treatment by Ian Jolliffe (2002) — that compresses high-dimensional data into fewer dimensions while preserving the maximum possible variance. It re-expresses correlated variables as a small set of uncorrelated principal components ordered by how much of the data's variation each one captures.