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arXiv 2104.07908cs.CLcs.LG
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MetaXL:面向低资源跨语言学习的Meta表示转换

MetaXL: Meta Representation Transformation for Low-resource Cross-lingual Learning

Microsoft Research(微软研究院);Carnegie Mellon University(卡内基梅隆大学)

Mengzhou Xia, Guoqing Zheng, Subhabrata Mukherjee, Milad Shokouhi, Graham Neubig, Ahmed Hassan Awadallah

摘要:

多语言预训练表示和跨语言迁移学习的结合是为低资源语言构建功能性NLP系统的最有效方法之一。然而,对于没有大规模单语语料库进行预训练或没有足够的注释数据进行微调的极低资源语言,迁移学习仍然是一个研究不足和具有挑战性的任务。此外,最近的工作表明,多语言表示在不同语言之间令人惊讶地不相交,这给迁移到资源极低的语言带来了额外的挑战。在本文中,我们提出了MetaXL,这是一个基于元学习的框架,它学会明智地将表示从辅助语言转换为目标语言,并使它们的表示空间更接近以进行有效的转换。在现实世界的低资源语言上进行的大量实验-没有访问大规模单语语料库或大量标记数据-用于跨语言情感分析和命名实体识别等任务,显示了我们方法的有效性。MetaXL的代码可在github.com/microsoft/MetaXL上公开获取。

英文摘要:

The combination of multilingual pre-trained representations and cross-lingual transfer learning is one of the most effective methods for building functional NLP systems for low-resource languages. However, for extremely low-resource languages without large-scale monolingual corpora for pre-training or sufficient annotated data for fine-tuning, transfer learning remains an under-studied and challenging task. Moreover, recent work shows that multilingual representations are surprisingly disjoint across languages, bringing additional challenges for transfer onto extremely low-resource languages. In this paper, we propose MetaXL, a meta-learning based framework that learns to transform representations judiciously from auxiliary languages to a target one and brings their representation spaces closer for effective transfer. Extensive experiments on real-world low-resource languages - without access to large-scale monolingual corpora or large amounts of labeled data - for tasks like cross-lingual sentiment analysis and named entity recognition show the effectiveness of our approach. Code for MetaXL is publicly available at github.com/microsoft/MetaXL.

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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