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Record W2293798619 · doi:10.3166/ria.29.153-172

Apprentissage de réseaux par agrégation bayésienne d’arbres couvrants

2015· article· fr· W2293798619 on OpenAlexvenueno aff
Loïc Schwaller, Stéphane Robin

Bibliographic record

VenueRevue d intelligence artificielle · 2015
Typearticle
Languagefr
FieldComputer Science
TopicBayesian Modeling and Causal Inference
Canadian institutionsnot available
Fundersnot available
KeywordsHumanitiesCombinatoricsPhilosophyMathematics

Abstract

fetched live from OpenAlex

Nous proposons dans cet article une méthode d’apprentissage de structure de modèle graphique basée sur les arbres couvrants. Étant donné un échantillon indépendant, Chow et Liu (1968) ont proposé un algorithme permettant de calculer l’arbre du maximum de vraisemblance. Cet algorithme consiste en une recherche d’arbre couvrant maximal où la matrice d’information mutuelle empirique entre les paires de variables est utilisée pour pondérer les arêtes. Nous présentons ici le pendant bayésien de cette approche fréquentiste. Une distribution a posteriori est calculée sur l’espace des arbres couvrants, ce qui nous permet ensuite de donner une probabilité a posteriori pour chacune des arêtes. L’intégration sur les paramètres de chacun des modèles est évitée en effectuant une approximation de type BIC. L’algorithme utilise un résultat d’algèbre appelé théorème arbre-matrice pour effectuer tous les calculs de manière exacte et rapide.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.002
metaresearch head score (Gemma)0.010
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.016
Threshold uncertainty score0.033

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0020.010
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0020.002
Bibliometrics0.0040.002
Science and technology studies0.0010.001
Scholarly communication0.0020.002
Open science0.0020.002
Research integrity0.0020.002
Insufficient payload (model declined to judge)0.0070.002

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.106
GPT teacher head0.304
Teacher spread0.198 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designTheoretical or conceptual
Domainnot available
GenreMethods

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2015
Admission routes1
Has abstractyes

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