Lifelong Machine Learning for Topic Modeling and Beyond Zhiyuan Chen author 2015-06 text Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Student Research Workshop Diana Inkpen editor Smaranda Muresan editor Shibamouli Lahiri editor Karen Mazidi editor Alisa Zhila editor Association for Computational Linguistics Denver, Colorado conference publication chen-2015-lifelong 10.3115/v1/N15-2018 https://aclanthology.org/N15-2018/ 2015-06 133 139