Search Results for author: Michael Affenzeller

Found 19 papers, 3 papers with code

Towards Vertical Privacy-Preserving Symbolic Regression via Secure Multiparty Computation

no code implementations22 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.

Privacy Preserving regression +1

A Probabilistic Transformation of Distance-Based Outliers

1 code implementation16 May 2023 David Muhr, Michael Affenzeller, Josef Küng

We describe a generic transformation of distance-based outlier scores into interpretable, probabilistic estimates.

Anomaly Detection Outlier Detection

Vectorial Genetic Programming -- Optimizing Segments for Feature Extraction

no code implementations3 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.

OutlierDetection.jl: A modular outlier detection ecosystem for the Julia programming language

1 code implementation8 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.

Outlier Detection

A Parallel Technique for Multi-objective Bayesian Global Optimization: Using a Batch Selection of Probability of Improvement

no code implementations7 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.

Symbolic Regression in Materials Science: Discovering Interatomic Potentials from Data

1 code implementation13 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.

regression Symbolic Regression

Probability Distribution of Hypervolume Improvement in Bi-objective Bayesian Optimization

no code implementations11 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.

Bayesian Optimization

Cluster Analysis of a Symbolic Regression Search Space

no code implementations28 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.

regression Symbolic Regression

Complexity Measures for Multi-objective Symbolic Regression

no code implementations1 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.

regression Symbolic Regression

Optimization Networks for Integrated Machine Learning

no code implementations1 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.

BIG-bench Machine Learning Combinatorial Optimization +2

On the Effectiveness of Genetic Operations in Symbolic Regression

no code implementations24 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.

regression Symbolic Regression

Concept Drift Detection with Variable Interaction Networks

no code implementations6 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.

Hash-Based Tree Similarity and Simplification in Genetic Programming for Symbolic Regression

no code implementations22 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.

regression Symbolic Regression

Resource-constrained multi-project scheduling with activity and time flexibility

no code implementations25 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.

Scheduling

On the Success Rate of Crossover Operators for Genetic Programming with Offspring Selection

no code implementations23 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.

Time Series Time Series Forecasting

Data Mining using Unguided Symbolic Regression on a Blast Furnace Dataset

no code implementations23 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.

Implicit Relations regression +2

Macro-Economic Time Series Modeling and Interaction Networks

no code implementations10 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.

regression Symbolic Regression +2

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