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Multi-scale Progressive Gated Transformer for Physiological Signal Classification
Proceedings of The 14th Asian Conference on Machine
Learning, PMLR 189:1293-1308, 2023.
Abstract
Physiological signal classification is of great
significance for health monitoring and medical
diagnosis. Deep learning-based methods (e.g. RNN and
CNN) have been used in this domain to obtain
reliable predictions. However, the performance of
existing methods is constrained by the long-term
dependence and irregular vibration of the univariate
physiological signal sequence. To overcome these
limitations, this paper proposes a Multi-scale
Progressive Gated Transformer (MPGT) model to learn
multi-scale temporal representations for better
physiological signal classification. The key
novelties of MPGT are the proposed Multi-scale
Temporal Feature extraction (MTF) and Progressive
Gated Transformer (PGT). The former adopts coarse-
and fine-grained feature extractors to project the
input signal data into different temporal
granularity embedding spaces and the latter
integrates such multi-scale information for data
representation. Classification task is then
conducted on the learned
representations. Experimental results on real-world
datasets demonstrate the superiority of the proposed
model.