Search Results for author: Ana Nikolikj

Found 6 papers, 0 papers with code

PS-AAS: Portfolio Selection for Automated Algorithm Selection in Black-Box Optimization

no code implementations14 Oct 2023 Ana Kostovska, Gjorgjina Cenikj, Diederick Vermetten, Anja Jankovic, Ana Nikolikj, Urban Skvorc, Peter Korosec, Carola Doerr, Tome Eftimov

Our proposed method creates algorithm behavior meta-representations, constructs a graph from a set of algorithms based on their meta-representation similarity, and applies a graph algorithm to select a final portfolio of diverse, representative, and non-redundant algorithms.

Algorithm Instance Footprint: Separating Easily Solvable and Challenging Problem Instances

no code implementations1 Jun 2023 Ana Nikolikj, Sašo Džeroski, Mario Andrés Muñoz, Carola Doerr, Peter Korošec, Tome Eftimov

In black-box optimization, it is essential to understand why an algorithm instance works on a set of problem instances while failing on others and provide explanations of its behavior.

Assessing the Generalizability of a Performance Predictive Model

no code implementations31 May 2023 Ana Nikolikj, Gjorgjina Cenikj, Gordana Ispirova, Diederick Vermetten, Ryan Dieter Lang, Andries Petrus Engelbrecht, Carola Doerr, Peter Korošec, Tome Eftimov

A key component of automated algorithm selection and configuration, which in most cases are performed using supervised machine learning (ML) methods is a good-performing predictive model.

Sensitivity Analysis of RF+clust for Leave-one-problem-out Performance Prediction

no code implementations30 May 2023 Ana Nikolikj, Michal Pluháček, Carola Doerr, Peter Korošec, Tome Eftimov

That is, instead of considering cosine distance in the feature space, we consider a weighted distance measure, with weights depending on the relevance of the feature for the regression model.

regression

RF+clust for Leave-One-Problem-Out Performance Prediction

no code implementations23 Jan 2023 Ana Nikolikj, Carola Doerr, Tome Eftimov

Per-instance automated algorithm configuration and selection are gaining significant moments in evolutionary computation in recent years.

AutoML feature selection +1

Improving Nevergrad's Algorithm Selection Wizard NGOpt through Automated Algorithm Configuration

no code implementations9 Sep 2022 Risto Trajanov, Ana Nikolikj, Gjorgjina Cenikj, Fabien Teytaud, Mathurin Videau, Olivier Teytaud, Tome Eftimov, Manuel López-Ibáñez, Carola Doerr

Algorithm selection wizards are effective and versatile tools that automatically select an optimization algorithm given high-level information about the problem and available computational resources, such as number and type of decision variables, maximal number of evaluations, possibility to parallelize evaluations, etc.

Cannot find the paper you are looking for? You can Submit a new open access paper.