arXiv:2410.04520cs.LG2024-10中稿 · AutoML Conference …被引 1

用动态加权提升模型集成效果,防止过拟合。

Regularized Neural Ensemblers

  • 用神经网络动态调整各模型权重,实现自适应集成。
  • 随机丢弃基模型预测可提升集成多样性,降低过拟合。
  • 在视觉、NLP、表格数据上表现优于主流基线。

集成方法通过结合多个基础模型提升机器学习模型的准确率和鲁棒性。然而,标准的贪心或随机集成方法常因假设集成成员对所有样本使用固定权重而受限,限制了表达能力并影响性能。本文探索将正则化神经网络用于集成,强调动态集成对自适应利用多样模型预测的重要性。为避免学习低多样性集成,提出在训练中随机丢弃基模型预测以正则化集成模型。实验表明,该方法可提供集成多样性的下界,减少过拟合,增强泛化能力。在计算机视觉、自然语言处理和表格数据等多种模态上,正则化神经集成器均达到与强基线相当甚至更优的表现。

原文摘要 · Abstract (English)

Ensemble methods are known for enhancing the accuracy and robustness of machine learning models by combining multiple base learners. However, standard approaches like greedy or random ensembling often fall short, as they assume a constant weight across samples for the ensemble members. This can limit expressiveness and hinder performance when aggregating the ensemble predictions. In this study, we explore employing regularized neural networks as ensemble methods, emphasizing the significance of dynamic ensembling to leverage diverse model predictions adaptively. Motivated by the risk of learning low-diversity ensembles, we propose regularizing the ensembling model by randomly dropping base model predictions during the training. We demonstrate this approach provides lower bounds for the diversity within the ensemble, reducing overfitting and improving generalization capabilities. Our experiments showcase that the regularized neural ensemblers yield competitive results compared to strong baselines across several modalities such as computer vision, natural language processing, and tabular data.

模型集成正则化动态加权泛化能力

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