Domain-Lifelong Learning for Dialogue State Tracking via Knowledge Preservation Networks Qingbin Liu author Pengfei Cao author Cao Liu author Jiansong Chen author Xunliang Cai author Fan Yang author Shizhu He author Kang Liu author Jun Zhao author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication liu-etal-2021-domain 10.18653/v1/2021.emnlp-main.176 https://aclanthology.org/2021.emnlp-main.176/ 2021-11 2301 2311