no code implementations • 22 Jul 2023 • Du Nguyen Duy, Michael Affenzeller, Ramin-Nikzad Langerodi
Symbolic Regression is a powerful data-driven technique that searches for mathematical expressions that explain the relationship between input variables and a target of interest.
1 code implementation • 16 May 2023 • David Muhr, Michael Affenzeller, Josef Küng
We describe a generic transformation of distance-based outlier scores into interpretable, probabilistic estimates.
Ranked #41 on Anomaly Detection on MVTec AD
no code implementations • 3 Mar 2023 • Philipp Fleck, Stephan Winkler, Michael Kommenda, Michael Affenzeller
The presented results indicate, that the different random sampling strategies do not impact the overall algorithm performance significantly, and that the guided strategies suffer from becoming stuck in local optima.
1 code implementation • 8 Nov 2022 • David Muhr, Michael Affenzeller, Anthony D. Blaom
Additionally, it provides a standardized, yet flexible, interface for future outlier detection algorithms and allows for model composition unseen in previous packages.
no code implementations • 7 Aug 2022 • Kaifeng Yang, Guozhi Dong, Michael Affenzeller
This paper proposes five alternatives of \emph{Probability of Improvement} (PoI) with multiple points in a batch (q-PoI) for multi-objective Bayesian global optimization (MOBGO), taking the covariance among multiple points into account.
1 code implementation • 13 Jun 2022 • Bogdan Burlacu, Michael Kommenda, Gabriel Kronberger, Stephan Winkler, Michael Affenzeller
This contribution discusses the role of symbolic regression in Materials Science (MS) and offers a comprehensive overview of current methodological challenges and state-of-the-art results.
no code implementations • 11 May 2022 • Hao Wang, Kaifeng Yang, Michael Affenzeller, Michael Emmerich
This work provides the exact expression of the probability distribution of the hypervolume improvement (HVI) for bi-objective generalization of Bayesian optimization.
no code implementations • 28 Sep 2021 • Lukas Kammerer, Gabriel Kronberger, Bogdan Burlacu, Stephan M. Winkler, Michael Kommenda, Michael Affenzeller
Symbolic regression is a powerful system identification technique in industrial scenarios where no prior knowledge on model structure is available.
no code implementations • 28 Sep 2021 • Gabriel Kronberger, Lukas Kammerer, Bogdan Burlacu, Stephan M. Winkler, Michael Kommenda, Michael Affenzeller
In this chapter we take a closer look at the distribution of symbolic regression models generated by genetic programming in the search space.
no code implementations • 1 Sep 2021 • Michael Kommenda, Andreas Beham, Michael Affenzeller, Gabriel Kronberger
Multi-objective symbolic regression has the advantage that while the accuracy of the learned models is maximized, the complexity is automatically adapted and need not be specified a-priori.
no code implementations • 1 Sep 2021 • Michael Kommenda, Johannes Karder, Andreas Beham, Bogdan Burlacu, Gabriel Kronberger, Stefan Wagner, Michael Affenzeller
In this contribution we revisit the core principles of optimization networks and demonstrate their suitability for solving machine learning problems.
no code implementations • 24 Aug 2021 • Bogdan Burlacu, Michael Affenzeller, Michael Kommenda
This paper describes a methodology for analyzing the evolutionary dynamics of genetic programming (GP) using genealogical information, diversity measures and information about the fitness variation from parent to offspring.
no code implementations • 6 Aug 2021 • Jan Zenisek, Gabriel Kronberger, Josef Wolfartsberger, Norbert Wild, Michael Affenzeller
The current development of today's production industry towards seamless sensor-based monitoring is paving the way for concepts such as Predictive Maintenance.
no code implementations • 22 Jul 2021 • Bogdan Burlacu, Lukas Kammerer, Michael Affenzeller, Gabriel Kronberger
We introduce in this paper a runtime-efficient tree hashing algorithm for the identification of isomorphic subtrees, with two important applications in genetic programming for symbolic regression: fast, online calculation of population diversity and algebraic simplification of symbolic expression trees.
no code implementations • 25 Feb 2019 • Viktoria A. Hauder, Andreas Beham, Sebastian Raggl, Sophie N. Parragh, Michael Affenzeller
Project scheduling in manufacturing environments often requires flexibility in terms of the selection and the exact length of alternative production activities.
no code implementations • 3 Feb 2019 • Bogdan Burlacu, Michael Affenzeller, Gabriel Kronberger, Michael Kommenda
Diversity represents an important aspect of genetic programming, being directly correlated with search performance.
no code implementations • 23 Sep 2013 • Gabriel Kronberger, Stephan Winkler, Michael Affenzeller, Andreas Beham, Stefan Wagner
Genetic programming is a powerful heuristic search technique that is used for a number of real world applications to solve among others regression, classification, and time-series forecasting problems.
no code implementations • 23 Sep 2013 • Michael Kommenda, Gabriel Kronberger, Christoph Feilmayr, Michael Affenzeller
The approach is based on unguided symbolic regression (every variable present in the dataset is treated as the target variable in multiple regression runs) and a novel variable relevance metric for genetic programming.
no code implementations • 10 Dec 2012 • Gabriel Kronberger, Stefan Fink, Michael Kommenda, Michael Affenzeller
In the proposed approach multiple symbolic regression runs are executed for each variable of the dataset to find potentially interesting models.