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arXiv 1902.10482cs.CL
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基于归纳网络的Few-Shot文本分类

Induction Networks for Few-Shot Text Classification

Beijing Institute of Technology(北京理工大学);Alibaba Group(阿里巴巴集团);Queen’s University(女王大学)

Ruiying Geng, Binhua Li, Yongbin Li, Xiaodan Zhu, Ping Jian, Jian Sun

摘要:

当数据不足或需要适应看不见的类时,文本分类往往会遇到困难。在这种具有挑战性的情况下,最近的研究使用元学习来模拟Few-Shot任务,其中新的查询在样本水平上与小的支持集进行比较。然而,这种样本比较可能会受到同一类中各种表达式的严重干扰。因此,我们应该能够学习支持集中每个类的一般表示,然后将其与新查询进行比较。在本文中,我们提出了一种新的感应网络来学习这样一个广义的类表示,通过创新地利用元学习中的动态路由算法。这样,我们发现该模型能够更好地归纳和推广。我们在一个经过充分研究的情感分类数据集(英语)和一个真实世界的对话意图分类数据集(中文)上评估了所提出的模型。实验结果表明,该模型在两个数据集上的分类性能均优于现有的最新方法,证明了类泛化在Few-Shot文本分类中的有效性.

英文摘要:

Text classification tends to struggle when data is deficient or when it needs to adapt to unseen classes. In such challenging scenarios, recent studies have used meta-learning to simulate the few-shot task, in which new queries are compared to a small support set at the sample-wise level. However, this sample-wise comparison may be severely disturbed by the various expressions in the same class. Therefore, we should be able to learn a general representation of each class in the support set and then compare it to new queries. In this paper, we propose a novel Induction Network to learn such a generalized class-wise representation, by innovatively leveraging the dynamic routing algorithm in meta-learning. In this way, we find the model is able to induce and generalize better. We evaluate the proposed model on a well-studied sentiment classification dataset (English) and a real-world dialogue intent classification dataset (Chinese). Experiment results show that on both datasets, the proposed model significantly outperforms the existing state-of-the-art approaches, proving the effectiveness of class-wise generalization in few-shot text classification.

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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