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Record W629116014

Data Fusion Using Weighted Likelihood

2012· article· en· W629116014 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueEuropean Journal of Pure and Applied Mathematics · 2012
Typearticle
Languageen
FieldComputer Science
TopicGaussian Processes and Bayesian Inference
Canadian institutionsYork University
Fundersnot available
KeywordsMathematicsEstimatorLikelihood functionSensor fusionPopulationData setFunction (biology)StatisticsAlgorithmData miningEstimation theoryArtificial intelligenceComputer science
DOInot available

Abstract

fetched live from OpenAlex

This article proposes to perform data fusion by using an adaptive weighted likelihood function when data sets are available from related populations. The main objective of data fusion is to integrate information from different sources to improve the quality of inference when the sample size from the target population is small or moderate. The weighted likelihood function is employed simply as an instrument to facilitate the data fusion process. The weighted likelihood method has informationtheoretic justification and embraces the widely used classical likelihood method which utilizes only on the data set from the target population. The degree of information integration in the proposed data fusion process is determined by the likelihood weights which should be chosen in a reasonable and adaptive way. The major challenge in the proposed data fusion process is then to choose likelihood weights adaptively and effectively when the deterministic relationships among all related parameters are unknown. We propose adaptive likelihood weights based on the estimated likelihood ratio. We show that the data fusion involving all relevant data sets could significantly improve the mean squared error (MSE) of the classical maximum likelihood estimator which only uses data set from the target population. It also increases the power for hypothesis testing. The proposed estimator is shown to be consistent and asymptotically normally distributed in the framework of generalized linear models. The advantage of the proposed weighted likelihood estimator for linear models is illustrated numerically by a simulation study. A real data example is also provided.

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.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation 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 score0.559
Threshold uncertainty score0.321

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.001
Open science0.0010.001
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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 head0.043
GPT teacher head0.258
Teacher spread0.216 · 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