DaMSTF: Domain Adversarial Learning Enhanced Meta Self-Training for Domain Adaptation

• URL: http://arxiv.org/abs/2308.02753v1
• Date: Sat, 5 Aug 2023 00:14:49 GMT
• Title: DaMSTF: Domain Adversarial Learning Enhanced Meta Self-Training for Domain Adaptation
• Authors: Menglong Lu, Zhen Huang, Yunxiang Zhao, Zhiliang Tian, Yang Liu and Dongsheng Li
• Abstract summary: We propose a new self-training framework for domain adaptation, namely Domain adversarial learning enhanced Self-Training Framework (DaMSTF) DaMSTF involves meta-learning to estimate the importance of each pseudo instance, so as to simultaneously reduce the label noise and preserve hard examples. DaMSTF improves the performance of BERT with an average of nearly 4%.
• Score: 20.697905456202754
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Self-training emerges as an important research line on domain adaptation. By taking the model's prediction as the pseudo labels of the unlabeled data, self-training bootstraps the model with pseudo instances in the target domain. However, the prediction errors of pseudo labels (label noise) challenge the performance of self-training. To address this problem, previous approaches only use reliable pseudo instances, i.e., pseudo instances with high prediction confidence, to retrain the model. Although these strategies effectively reduce the label noise, they are prone to miss the hard examples. In this paper, we propose a new self-training framework for domain adaptation, namely Domain adversarial learning enhanced Self-Training Framework (DaMSTF). Firstly, DaMSTF involves meta-learning to estimate the importance of each pseudo instance, so as to simultaneously reduce the label noise and preserve hard examples. Secondly, we design a meta constructor for constructing the meta-validation set, which guarantees the effectiveness of the meta-learning module by improving the quality of the meta-validation set. Thirdly, we find that the meta-learning module suffers from the training guidance vanishment and tends to converge to an inferior optimal. To this end, we employ domain adversarial learning as a heuristic neural network initialization method, which can help the meta-learning module converge to a better optimal. Theoretically and experimentally, we demonstrate the effectiveness of the proposed DaMSTF. On the cross-domain sentiment classification task, DaMSTF improves the performance of BERT with an average of nearly 4%.

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