Domain Incremental Lifelong Learning in an Open World
Yi Dai, Hao Lang, Yinhe Zheng, Bowen Yu, Fei Huang, Yongbin Li
Abstract
Lifelong learning (LL) is an important ability for NLP models to learn new tasks continuously. Architecture-based approaches are reported to be effective implementations for LL models. However, it is non-trivial to extend previous approaches to domain incremental LL scenarios since they either require access to task identities in the testing phase or cannot handle samples from unseen tasks. In this paper, we propose Diana: a dynamic architecture-based lifelong learning model that tries to learn a sequence of tasks with a prompt-enhanced language model. Four types of hierarchically organized prompts are used in Diana to capture knowledge from different granularities. Specifically, we dedicate task-level prompts to capture task-specific knowledge to retain high LL performances and maintain instance-level prompts to learn knowledge shared across input samples to improve the model’s generalization performance. Moreover, we dedicate separate prompts to explicitly model unseen tasks and introduce a set of prompt key vectors to facilitate knowledge sharing between tasks. Extensive experiments demonstrate that Diana outperforms state-of-the-art LL models, especially in handling unseen tasks.- Anthology ID:
- 2023.findings-acl.361
- Volume:
- Findings of the Association for Computational Linguistics: ACL 2023
- Month:
- July
- Year:
- 2023
- Address:
- Toronto, Canada
- Editors:
- Anna Rogers, Jordan Boyd-Graber, Naoaki Okazaki
- Venue:
- Findings
- SIG:
- Publisher:
- Association for Computational Linguistics
- Note:
- Pages:
- 5844–5865
- Language:
- URL:
- https://aclanthology.org/2023.findings-acl.361
- DOI:
- 10.18653/v1/2023.findings-acl.361
- Cite (ACL):
- Yi Dai, Hao Lang, Yinhe Zheng, Bowen Yu, Fei Huang, and Yongbin Li. 2023. Domain Incremental Lifelong Learning in an Open World. In Findings of the Association for Computational Linguistics: ACL 2023, pages 5844–5865, Toronto, Canada. Association for Computational Linguistics.
- Cite (Informal):
- Domain Incremental Lifelong Learning in an Open World (Dai et al., Findings 2023)
- PDF:
- https://preview.aclanthology.org/naacl24-info/2023.findings-acl.361.pdf