arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2312.04546cs.LGcs.AIstat.APstat.ML
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用于特征偏移检测与校正的对抗学习

Adversarial Learning for Feature Shift Detection and Correction

Stanford University(斯坦福大学);Universitat Politècnica de Catalunya(加泰罗尼亚理工大学);University of California, Berkeley(加州大学伯克利分校);Amazon(亚马逊)

Miriam Barrabes, Daniel Mas Montserrat, Margarita Geleta, Xavier Giro-i-Nieto, Alexander G. Ioannidis

AI总结:

提出一种基于对抗学习的特征偏移定位与校正框架,利用多种判别器和迭代启发式方法识别并修复受损特征,性能优于现有统计与神经网络方法。

摘要:

数据偏移是许多真实应用中存在的现象,尽管已有多种方法尝试检测偏移,但定位并校正引发这些偏移的特征这一任务尚未得到深入研究。特征偏移可能出现在许多数据集中,包括部分传感器发生故障的多传感器数据,也包括表格和结构化数据,如生物医学、金融和调查数据;在这些数据中,错误的标准化和数据处理流水线可能导致特征出错。在本工作中,我们探索运用对抗学习原则:利用若干经过训练以区分两种分布的判别器所提供的信息,既检测受损特征,又对其进行修复,从而消除数据集之间的分布偏移。我们表明,随机森林或梯度提升树等主流监督分类器结合简单的迭代启发式方法,能够定位并校正特征偏移,其表现优于当前基于统计和神经网络的技术。代码可在 https://github.com/AI-sandbox/DataFix 获取。

英文摘要:

Data shift is a phenomenon present in many real-world applications, and while there are multiple methods attempting to detect shifts, the task of localizing and correcting the features originating such shifts has not been studied in depth. Feature shifts can occur in many datasets, including in multi-sensor data, where some sensors are malfunctioning, or in tabular and structured data, including biomedical, financial, and survey data, where faulty standardization and data processing pipelines can lead to erroneous features. In this work, we explore using the principles of adversarial learning, where the information from several discriminators trained to distinguish between two distributions is used to both detect the corrupted features and fix them in order to remove the distribution shift between datasets. We show that mainstream supervised classifiers, such as random forest or gradient boosting trees, combined with simple iterative heuristics, can localize and correct feature shifts, outperforming current statistical and neural network-based techniques. The code is available at https://github.com/AI-sandbox/DataFix.

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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