Deep Unknown Intent Detection with Margin Loss Ting-En Lin author Hua Xu author 2019-07 text Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics Anna Korhonen editor David Traum editor Lluís Màrquez editor Association for Computational Linguistics Florence, Italy conference publication lin-xu-2019-deep 10.18653/v1/P19-1548 https://aclanthology.org/P19-1548/ 2019-07 5491 5496