Abstract
The task of Chinese Spelling Check (CSC) is to detect and correct spelling errors in Chinese sentences. Since the scale of labeled CSC training set is quite small, we propose an unsupervised Chinese spelling correction framework based on detectors. Two kinds of detectors: Dec-Err and Dec-Eva, are proposed to leverage the contextual information to detect misspelled characters and evaluate the corrections respectively. Both detectors are fine-tuned with our proposed hybrid mask strategy. Dec-Eva is a transformer encoder based detector, of which we modify the attention connections to reuse the contextual information and parallel evaluate possible corrections. Compared with supervised and unsupervised state-of-the-art methods, experimental studies show that our method achieves competitive results. Further empirical studies reveal the efficiency and flexibility of our method.
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Notes
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Pinyin is the romanization spelling system for the sounds of Chinese characters.
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Shao, F., Li, J. (2023). Dual-Detector: An Unsupervised Learning Framework for Chinese Spelling Check. In: Kashima, H., Ide, T., Peng, WC. (eds) Advances in Knowledge Discovery and Data Mining. PAKDD 2023. Lecture Notes in Computer Science(), vol 13938. Springer, Cham. https://doi.org/10.1007/978-3-031-33383-5_13
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