Abstract
This paper proposes a simple retraining scheme to purposefully adjust unsupervised word embeddings for specific supervised tasks, such as sentence classification. Different from the current methods, which fine-tune word embeddings in training set through the supervised learning procedure, our method treats the labels of task as implicit context information to retrain word embeddings, so that every required word for the intended task obtains task-specific representation. Moreover, because our method is independent of the supervised learning process, it has less risk of over-fitting. We have validated the rationality of our method on various sentence classification tasks. The improvements of accuracy are remarkable, when only scarce training set is available.
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Notes
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Words exist in vocabulary but merely present on prediction corpus.
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Acknowledgments
This work was supported by 111 Project of China under Grant no. B08004, the National Natural Science Foundation of China (61273217, 61300080), the Ph.D. Programs Foundation of Ministry of Education of China (20130005110004).
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Qin, P., Xu, W., Guo, J. (2017). A Targeted Retraining Scheme of Unsupervised Word Embeddings for Specific Supervised Tasks. In: Kim, J., Shim, K., Cao, L., Lee, JG., Lin, X., Moon, YS. (eds) Advances in Knowledge Discovery and Data Mining. PAKDD 2017. Lecture Notes in Computer Science(), vol 10235. Springer, Cham. https://doi.org/10.1007/978-3-319-57529-2_1
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