We proudly present the first result of our cooperation in the UTOPIAE network:
Lorenzo Gentile, Martin Zaefferer, and Thomas Bartz-Beielstein published a paper about sequential parameter optimization. The paper is based on the talk given by Thomas Bartz-Beielstein during the UTOPIAE Network Training School at University of Strathclyde, Glasgow, earlier this year.
The paper is entitled “In a Nutshell: Sequential Parameter Optimization”. It gives a short introduction to surrogate model based optimization, which will be applied in the UTOPIAE project. Many examples illustrate the usefulness of the SPOT approach.
The paper can be downloaded here.
The abstract reads as follows:
The performance of optimization algorithms relies crucially on their parameterizations. Finding good parameter settings is called algorithm tuning. Using a simple simulated annealing algorithm, we will demonstrate how optimization algorithms can be tuned using the sequential parameter opti- mization toolbox (SPOT). SPOT provides several tools for automated and interactive tuning. The underling concepts of the SPOT approach are explained. This includes key techniques such as exploratory fitness landscape analysis and response surface methodology. Many examples illustrate how SPOT can be used for understanding the performance of algorithms and gaining insight into algorithm’s behavior. Furthermore, we demonstrate how SPOT can be used as an optimizer and how a sophisticated ensemble approach is able to combine several meta models via stacking.
Die TH Köln hat auf ihrer Web-Seite ein Interview mit Martina Friese und Prof. Bartz-Beielstein zur diesjährigen GECCO Challenge veröffentlicht. Der Text ist hier zu finden.
Das Team des SPOTSeven Lab mit Prof. Dr. Thomas Bartz-Beielstein (Mitte hinten) (Bild: Dirk Adolphs/TH Köln)
Interessierte Privatpersonen, Schulen und Unternehmen gesucht: Wie kann die Trinkwasserqualität in Nordrhein-Westfalen sichergestellt werden? Wie kann der Klimawandel berücksichtigt werden? Und wie kann die Trinkwasserversorgung vor Terroranschlägen geschützt werden? Diesen Fragen geht Prof. Dr. Thomas Bartz-Beielstein im Forschungsprojekt OWOS „OpenWater – OpenSource“ nach. Mehr: https://www.th-koeln.de/hochschule/open-water-open-source_45636.php
The new research project OWOS (“Open Water – Open Scource”) starts this month.
Dr. Bartz-Beielstein is one of twenty professors in North Rhine-Westfalia, who were awarded with a research professorship. This research professorship enables Dr. Bartz-Beielstein to intensify research with his PhD students and to make research results available for the public.
Here are some photos from the celebration during the SPOTSeven doctoral seminar.
The article imputeTS: Time Series Missing Value Imputation in R by Steffen Moritz and Thomas Bartz-Beielstein has been accepted for publication in the R Journal. Continue reading
If you are interested in “Model-based Methods for Continuous and Discrete Global Optimization“, you can freely access the article until April 11, 2017:
The SPO Toolbox was used for performing the experiments described in this article. The Sequential Parameter Optimization Toolbox 2.0.1 is a major update of the SPOT R package. It provides a set of tools for model based optimization and tuning of algorithms. It includes surrogate models, optimizers and design of experiment approaches. The main interface is spot, which uses sequentially updated surrogate models for the purpose of efficient optimization. The main goal is to ease the burden of objective function evaluations, when a single evaluation requires a significant amount of resources. See: https://CRAN.R-project.org/package=SPOT