DOC: Deep Open Classification of Text Documents Lei Shu author Hu Xu author Bing Liu author 2017-09 text Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing Martha Palmer editor Rebecca Hwa editor Sebastian Riedel editor Association for Computational Linguistics Copenhagen, Denmark conference publication shu-etal-2017-doc 10.18653/v1/D17-1314 https://aclanthology.org/D17-1314/ 2017-09 2911 2916