Search Results for author: Giorgos Borboudakis

Found 6 papers, 1 papers with code

A Meta-Level Learning Algorithm for Sequential Hyper-Parameter Space Reduction in AutoML

1 code implementation11 Dec 2023 Giorgos Borboudakis, Paulos Charonyktakis, Konstantinos Paraschakis, Ioannis Tsamardinos

AutoML platforms have numerous options for the algorithms to try for each step of the analysis, i. e., different possible algorithms for imputation, transformations, feature selection, and modelling.

AutoML feature selection +1

Massively-Parallel Feature Selection for Big Data

no code implementations23 Aug 2017 Ioannis Tsamardinos, Giorgos Borboudakis, Pavlos Katsogridakis, Polyvios Pratikakis, Vassilis Christophides

We present the Parallel, Forward-Backward with Pruning (PFBP) algorithm for feature selection (FS) in Big Data settings (high dimensionality and/or sample size).

feature selection

Bootstrapping the Out-of-sample Predictions for Efficient and Accurate Cross-Validation

no code implementations23 Aug 2017 Ioannis Tsamardinos, Elissavet Greasidou, Michalis Tsagris, Giorgos Borboudakis

BBC-CV's main idea is to bootstrap the whole process of selecting the best-performing configuration on the out-of-sample predictions of each configuration, without additional training of models.

Forward-Backward Selection with Early Dropping

no code implementations30 May 2017 Giorgos Borboudakis, Ioannis Tsamardinos

In experiments we show that the proposed heuristic increases computational efficiency by about two orders of magnitude in high-dimensional problems, while selecting fewer variables and retaining predictive performance.

Computational Efficiency feature selection

Scoring and Searching over Bayesian Networks with Causal and Associative Priors

no code implementations9 Aug 2014 Giorgos Borboudakis, Ioannis Tsamardinos

A significant theoretical advantage of search-and-score methods for learning Bayesian Networks is that they can accept informative prior beliefs for each possible network, thus complementing the data.

Scoring and Searching over Bayesian Networks with Causal and Associative Priors

no code implementations28 Sep 2012 Giorgos Borboudakis, Ioannis Tsamardinos

A significant theoretical advantage of search-and-score methods for learning Bayesian Networks is that they can accept informative prior beliefs for each possible network, thus complementing the data.

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