arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.14719cs.CLcs.LG
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基于分类器分歧的跨领域意见目标提取自训练

Self-training through Classifier Disagreement for Cross-Domain Opinion Target Extraction

Beihang University(北京航空航天大学);University of Sheffield(谢菲尔德大学);University of Ottawa(渥太华大学)

Kai Sun, Richong Zhang, Samuel Mensah, Nikolaos Aletras, Yongyi Mao, Xudong Liu

摘要:

观点目标抽取(OTE)或观点方面抽取(AE)是观点挖掘中的一项基本任务,旨在抽取观点所表达的目标(或观点方面)。最近的工作集中在跨域OTE,这通常是在现实世界中遇到的情况下,测试和训练分布不同。大多数方法使用域对抗神经网络,其目的是减少标记的源域和未标记的目标域之间的域间隙,以提高目标域性能。然而,这种方法只对齐特征分布,而不考虑类特征对齐,导致次优结果。半监督学习(SSL)已经被探索作为一种解决方案,但受到模型生成的伪标签质量的限制。受领域自适应[2]理论基础的启发,我们提出了一种新的SSL方法,该方法选择目标样本,其来自特定领域教师和学生网络的模型输出不同意未标记的目标数据,以提高目标领域的性能。在跨领域OTE基准数据集上的实验表明,该方法是有效的,并且在具有大的领域偏移的情况下表现良好。

英文摘要:

Opinion target extraction (OTE) or aspect extraction (AE) is a fundamental task in opinion mining that aims to extract the targets (or aspects) on which opinions have been expressed. Recent work focus on cross-domain OTE, which is typically encountered in real-world scenarios, where the testing and training distributions differ. Most methods use domain adversarial neural networks that aim to reduce the domain gap between the labelled source and unlabelled target domains to improve target domain performance. However, this approach only aligns feature distributions and does not account for class-wise feature alignment, leading to suboptimal results. Semi-supervised learning (SSL) has been explored as a solution, but is limited by the quality of pseudo-labels generated by the model. Inspired by the theoretical foundations in domain adaptation [2], we propose a new SSL approach that opts for selecting target samples whose model output from a domain-specific teacher and student network disagree on the unlabelled target data, in an effort to boost the target domain performance. Extensive experiments on benchmark cross-domain OTE datasets show that this approach is effective and performs consistently well in settings with large domain shifts.

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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