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arXiv 2201.10227cs.LG
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不平衡分类情境下的冷启动主动学习策略

Cold Start Active Learning Strategies in the Context of Imbalanced Classification

Luxembourg Institute of Science and Technology(卢森堡科学技术研究所);University of Geneva(日内瓦大学)

Etienne Brangbour, Pierrick Bruneau, Thomas Tamisier, Stéphane Marchand-Maillet

摘要:

我们提出了新的主动学习策略,致力于提供一个解决方案的冷启动阶段,即初始化分类的一个大的数据集没有附加标签。此外,所提出的策略旨在处理随机选择效率极低的不平衡环境。具体来说,我们的主动学习迭代使用元素得分来解决标签稀缺性和不平衡性,将从聚类结构中提取的信息结合到标签传播模型中。该战略说明了一个案例研究,对Twitter的内容w.r.t.一个真实的洪水事件的证词。我们表明,我们的方法有效地应对类不平衡,通过提高少数类的样本的召回。

英文摘要:

We present novel active learning strategies dedicated to providing a solution to the cold start stage, i.e. initializing the classification of a large set of data with no attached labels. Moreover, proposed strategies are designed to handle an imbalanced context in which random selection is highly inefficient. Specifically, our active learning iterations address label scarcity and imbalance using element scores, combining information extracted from a clustering structure to a label propagation model. The strategy is illustrated by a case study on annotating Twitter content w.r.t. testimonies of a real flood event. We show that our method effectively copes with class imbalance, by boosting the recall of samples from the minority class.

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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