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WEASEL 2.0 time series classifier revisited with adaptive ensemble rule

Researchers have revisited the WEASEL 2.0 time series classification algorithm, confirming its performance on 114 UCR datasets with a mean accuracy of 0.865. The study found that while the downstream classifier, feature weighting, and maximum window size rules were robust, the maximum ensemble size rule was over-provisioned for longer series. This led to the development of an adaptive rule that adjusts ensemble size based on series length and class count, significantly reducing memory and computation time with minimal impact on accuracy. AI

IMPACT This research offers a more efficient approach to time series classification, potentially reducing computational costs for related AI tasks.

RANK_REASON The item is a research paper detailing an improvement to an existing algorithm. [lever_c_demoted from research: ic=1 ai=1.0]

Read on arXiv cs.LG →

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WEASEL 2.0 time series classifier revisited with adaptive ensemble rule

COVERAGE [1]

  1. arXiv cs.LG TIER_1 English(EN) · Cian Higgins, Gerard Carrigan, Pinar Sungu Isiacik, Georgiana Ifrim ·

    Revisiting WEASEL 2.0: Reproduction, Sensitivity, and an Adaptive Ensemble-Size Rule

    arXiv:2608.18021v1 Announce Type: new Abstract: WEASEL 2.0 is a dictionary-based time series classifier that combines dilated sliding windows with a randomised hyperparameter ensemble and a fixed-size dense feature representation. Two of its hyperparameter choices, the maximum en…