Search Results for author: Lennart Purucker

Found 4 papers, 1 papers with code

Revealing the Hidden Impact of Top-N Metrics on Optimization in Recommender Systems

no code implementations16 Jan 2024 Lukas Wegmeth, Tobias Vente, Lennart Purucker

In pursuit of an answer, we exhaustively evaluate the predictive performance of 250 selection strategies besides selecting the top-n. We extensively evaluate each selection strategy over twelve implicit feedback and eight explicit feedback data sets with eleven recommender systems algorithms.

Recommendation Systems Re-Ranking

Q(D)O-ES: Population-based Quality (Diversity) Optimisation for Post Hoc Ensemble Selection in AutoML

no code implementations17 Jul 2023 Lennart Purucker, Lennart Schneider, Marie Anastacio, Joeran Beel, Bernd Bischl, Holger Hoos

Automated machine learning (AutoML) systems commonly ensemble models post hoc to improve predictive performance, typically via greedy ensemble selection (GES).

AutoML

CMA-ES for Post Hoc Ensembling in AutoML: A Great Success and Salvageable Failure

no code implementations1 Jul 2023 Lennart Purucker, Joeran Beel

Consequently, we compared the performance of covariance matrix adaptation evolution strategy (CMA-ES), state-of-the-art gradient-free numerical optimization, to GES on the 71 classification datasets from the AutoML benchmark for AutoGluon.

AutoML Model Selection +1

Assembled-OpenML: Creating Efficient Benchmarks for Ensembles in AutoML with OpenML

1 code implementation1 Jul 2023 Lennart Purucker, Joeran Beel

Moreover, we present an example of using Assembled-OpenML to compare a set of ensemble techniques.

AutoML

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