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Yoon, Sung Whan
Machine Intelligence and Information Learning Lab.
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XB-MAML: Learning Expandable Basis Parameters for Effective Meta-Learning with Wide Task Coverage

Lee, Jae-JunYoon, Sung Whan
Issued Date
International Conference on Artificial Intelligence and Statistics
Meta-learning, which pursues an effective initialization model, has emerged as a promising approach to handling unseen tasks. However, a limitation remains to be evident when a meta-learner tries to encompass a wide range of task distribution, e.g., learning across distinctive datasets or domains. Recently, a group of works has attempted to employ multiple model initializations to cover widelyranging tasks, but they are limited in adaptively expanding initializations. We introduce XB-MAML, which learns expandable basis parameters, where they are linearly combined to form an effective initialization to a given task. XB-MAML observes the discrepancy between the vector space spanned by the basis and fine-tuned parameters to decide whether to expand the basis. Our method surpasses the existing works in the multi-domain meta-learning benchmarks and opens up new chances of meta-learning for obtaining the diverse inductive bias that can be combined to stretch toward the effective initialization for diverse unseen tasks.
Society for Artificial Intelligence and Statistics


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