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arXiv 2404.03419cs.LGcs.AI
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将超参数搜索集成到基于上下文无关文法的无模型AutoML中

Integrating Hyperparameter Search into Model-Free AutoML with Context-Free Grammars

MercadoLibre Inc.(美客多公司)

Hernán Ceferino Vázquez, Jorge Sanchez, Rafael Carrascosa

AI总结:

针对现有无模型AutoML方法GramML仅搜索流水线结构、使用默认超参数的局限,提出集成超参数搜索的扩展方案,经OpenML基准测试,性能较前沿技术有显著提升。

摘要:

近年来,自动化机器学习(AutoML)因能够减少设计和开发机器学习系统所需的时间与专业知识而日益流行。这对机器学习实践至关重要,它支持快速构建强大的基线,提升数据科学家的工作效率,并缩短投产时间。然而,尽管AutoML具备诸多优势,它仍面临若干挑战,例如解空间的定义以及对其的高效探索。近期,已有研究表明部分方法可借助基于树的搜索算法和上下文无关文法实现这一目标。具体而言,GramML提出了一种无模型强化学习方法,该方法利用流水线配置文法,并通过蒙特卡洛树搜索运行。不过,GramML的局限性之一在于它使用默认超参数,将搜索问题局限于为可用的数据预处理器和模型寻找最优流水线结构。在本研究中,我们提出了对GramML的扩展方案,该方案支持包含超参数搜索在内的更大搜索空间。我们使用OpenML基准对该方法进行了评估,结果显示,与其他现有前沿技术相比,该方法实现了显著提升。

英文摘要:

Automated Machine Learning (AutoML) has become increasingly popular in recent years due to its ability to reduce the amount of time and expertise required to design and develop machine learning systems. This is very important for the practice of machine learning, as it allows building strong baselines quickly, improving the efficiency of the data scientists, and reducing the time to production. However, despite the advantages of AutoML, it faces several challenges, such as defining the solutions space and exploring it efficiently. Recently, some approaches have been shown to be able to do it using tree-based search algorithms and context-free grammars. In particular, GramML presents a model-free reinforcement learning approach that leverages pipeline configuration grammars and operates using Monte Carlo tree search. However, one of the limitations of GramML is that it uses default hyperparameters, limiting the search problem to finding optimal pipeline structures for the available data preprocessors and models. In this work, we propose an extension to GramML that supports larger search spaces including hyperparameter search. We evaluated the approach using an OpenML benchmark and found significant improvements compared to other state-of-the-art techniques.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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