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Searching for Machine Learning Pipelines Using a Context-Free Grammar

AAAI 2021 · Architectures and efficiency › Neural architecture search · approach: AutoML pipeline search · 19 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Search DAG-shaped pipeline structures instead of using a fixed linear structurePIPER and PIPERX · OpenML classification datasetsaverage rankHelped
Continue greedy search beyond the first solution and evaluate terminal structures with sampled configurationsPIPERX · OpenML classification datasetsaverage rankHelped
Continue greedy search and optimize each terminal structure with a shorter CASH runPIPERZ · OpenML classification datasetsaverage rankHurt
Spend only a relatively small amount of time optimizing each visited pipeline structurePIPERZ · Representative OpenML datasetsclassification errorHurt

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