Search Results for author: Daniel de Marchi

Found 3 papers, 1 papers with code

Revisiting Bellman Errors for Offline Model Selection

1 code implementation31 Jan 2023 Joshua P. Zitovsky, Daniel de Marchi, Rishabh Agarwal, Michael R. Kosorok

Offline model selection (OMS), that is, choosing the best policy from a set of many policies given only logged data, is crucial for applying offline RL in real-world settings.

Atari Games Model Selection +1

A Robust Hypothesis Test for Tree Ensemble Pruning

no code implementations24 Jan 2023 Daniel de Marchi, Matthew Welch, Michael Kosorok

In this paper we develop and present a novel theoretically justified hypothesis test of split quality for gradient boosted tree ensembles and demonstrate that using this method instead of the common penalty terms leads to a significant reduction in out of sample loss.

Ensemble Pruning

Augmenting Molecular Images with Vector Representations as a Featurization Technique for Drug Classification

no code implementations9 Aug 2020 Daniel de Marchi, Amarjit Budhiraja

One of the key steps in building deep learning systems for drug classification and generation is the choice of featurization for the molecules.

General Classification

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