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- W4387421735 abstract "Recently self-supervised learning (SSL) has been proposed in the field of human activity recognition (HAR) as a solution to the labelled data availability problem. The idea being that by using pretext tasks such as reconstruction or contrastive predictive coding, useful representations can be learned that then can be used for classification. Those approaches follow the pretrain, freeze and fine-tune procedure. In this work we investigate how a simple change - not freezing the representation - leads to substantial performance gains across pretext tasks. The improvement was found in all four investigated datasets and across all four pretext tasks and is inversely proportional to amount of labelled data. Moreover the effect is present whether the pretext task is carried on the Capture24 dataset or directly in unlabelled data of the target dataset." @default.
- W4387421735 created "2023-10-08" @default.
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- W4387421735 date "2023-10-08" @default.
- W4387421735 modified "2023-10-11" @default.
- W4387421735 title "Don't freeze: Finetune encoders for better Self-Supervised HAR" @default.
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- W4387421735 doi "https://doi.org/10.1145/3594739.3610790" @default.
- W4387421735 hasPublicationYear "2023" @default.
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