arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1902.05066cs.LGcs.AIstat.ML
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具有稳定学习率的鲁棒多示例学习

Robust Multi-instance Learning with Stable Instances

University of South Australia(南澳大利亚大学)

Weijia Zhang, Jiuyong Li, Lin Liu

摘要:

多实例学习(MIL)处理数据由一组袋子表示的任务,每个袋子由一组实例描述。与标准的监督学习不同,只观察袋子标签,而每个实例的标签对学习者不可用。以前的MIL研究通常遵循i.i.d.假设训练样本和测试样本独立地取自同一分布。然而,这种假设在现实世界的应用中经常被违反。已经努力通过利用训练样本和测试样本之间的密度比对训练数据进行重要性加权来解决分布变化。不幸的是,模型通常需要在没有看到测试分布的情况下进行训练。在本文中,我们提出了可能的第一个框架,用于解决分布变化MIL不需要访问未标记的测试数据。我们的框架建立在确定一个新的连接MIL和潜在的结果框架之间的因果效应估计。在合成分布变化数据集、具有合成分布偏差的真实数据集和真实分布偏差的图像分类数据集上的实验结果验证了该方法的有效性。

英文摘要:

Multi-instance learning (MIL) deals with tasks where data is represented by a set of bags and each bag is described by a set of instances. Unlike standard supervised learning, only the bag labels are observed whereas the label for each instance is not available to the learner. Previous MIL studies typically follow the i.i.d. assumption, that the training and test samples are independently drawn from the same distribution. However, such assumption is often violated in real-world applications. Efforts have been made towards addressing distribution changes by importance weighting the training data with the density ratio between the training and test samples. Unfortunately, models often need to be trained without seeing the test distributions. In this paper we propose possibly the first framework for addressing distribution change in MIL without requiring access to the unlabeled test data. Our framework builds upon identifying a novel connection between MIL and the potential outcome framework in causal effect estimation. Experimental results on synthetic distribution change datasets, real-world datasets with synthetic distribution biases and real distributional biased image classification datasets validate the effectiveness of our approach.

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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