arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.08473stat.MLcs.LG
收藏

使用SGD训练的模型的数据清洗

Data Cleansing for Models Trained with SGD

Osaka University(大阪大学);The University of Tokyo(东京大学);RIKEN AIP(理化学研究所人工智能研究中心)

Satoshi Hara, Atsushi Nitanda, Takanori Maehara

摘要:

数据清洗是一种用于提高机器学习模型准确性的典型方法,然而,这需要广泛的领域知识来识别影响模型的有影响力的实例。在本文中,我们提出了一个算法,可以建议有影响力的情况下,不使用任何领域的知识。使用该方法,用户只需要检查算法建议的实例,这意味着用户不需要广泛的知识,这使得即使是非专家也可以进行数据清洗和改进模型。现有的方法要求损失函数是凸的,并获得最优模型,这在现代机器学习中并不总是这样。为了克服这些局限性,我们提出了一种专门为随机梯度下降(SGD)训练的模型设计的新方法。该方法通过追溯SGD的步骤,同时结合在每个步骤中计算的中间模型来推断有影响的实例。实验结果表明,该方法能够准确地推断出影响实例.此外,我们使用MNIST和CIFAR10表明,该模型可以有效地改善,通过删除所提出的方法建议的有影响力的实例。

英文摘要:

Data cleansing is a typical approach used to improve the accuracy of machine learning models, which, however, requires extensive domain knowledge to identify the influential instances that affect the models. In this paper, we propose an algorithm that can suggest influential instances without using any domain knowledge. With the proposed method, users only need to inspect the instances suggested by the algorithm, implying that users do not need extensive knowledge for this procedure, which enables even non-experts to conduct data cleansing and improve the model. The existing methods require the loss function to be convex and an optimal model to be obtained, which is not always the case in modern machine learning. To overcome these limitations, we propose a novel approach specifically designed for the models trained with stochastic gradient descent (SGD). The proposed method infers the influential instances by retracing the steps of the SGD while incorporating intermediate models computed in each step. Through experiments, we demonstrate that the proposed method can accurately infer the influential instances. Moreover, we used MNIST and CIFAR10 to show that the models can be effectively improved by removing the influential instances suggested by the proposed method.

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。

↑