Cited by 3,342Time Series Analysis and ForecastingMusic and Audio ProcessingNeural Networks and Applications

The DOI matches its Crossref record; 142 of the 149 references it cites were found in a registry or an index; none of the 84 sources its claims cite is checked for support yet.

Deep learning for time series classification: a review

Open access
Ismail Fawaz, Hassan, Forestier, Germain, Weber, Jonathan, Idoumghar, Lhassane, Muller, Pierre-Alain·2019·Data Mining and Knowledge Discovery

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

This review empirically compares nine end-to-end deep learning architectures for time series classification across 97 univariate and multivariate datasets, training 8,730 models. It finds that a deep residual network (ResNet) is the strongest DNN, significantly outperforming most other deep models and reaching performance not significantly different from COTE/HIVE-COTE on the UCR/UEA archive.

Key findings

  • ResNet significantly outperformed the other deep learning approaches on the 85 univariate UCR/UEA datasets, with an average rank of almost 2, winning on 50 out of 85 problems; FCN and Encoder followed as second and third.
  • ResNet was not significantly different from COTE/HIVE-COTE in pairwise statistical tests, while NN-DTW-WW and EE showed the lowest average ranks among compared state-of-the-art methods.
  • MCNN and t-LeNet, which use window slicing/subsequence extraction, yielded very low accuracies with only one win (Earthquakes); MCDCNN and Time-CNN performed similarly to MLP.
  • ResNet was more stable across random initializations than FCN, with average standard deviation 1.48 versus 1.70; on DiatomSizeReduction, ResNet and FCN reached only 30% accuracy while Time-CNN reached 95%.

Methods

  • The authors reimplemented nine discriminative end-to-end deep learning models (MLP, FCN, ResNet, Encoder, MCNN, t-LeNet, MCDCNN, Time-CNN, TWIESN) in a common Keras/TensorFlow framework and trained each with 10 random initializations on 97 datasets: 85 univariate UCR/UEA datasets and 12 multivariate datasets.
  • In total, 8,730 experiments were run on a cluster of 60 GPUs; accuracy was averaged over the 10 runs, and comparisons with published state-of-the-art results used median test error.
  • Statistical comparison used the Friedman test followed by pairwise Wilcoxon signed-rank tests with Holm’s alpha correction (5%), visualized with critical difference diagrams.

Limitations

  • The paper states that generative models and models using hand-engineered features were excluded, and that transfer learning, data augmentation, training/testing time, and normalization effects were not thoroughly studied.
  • The paper acknowledges that non-deep state-of-the-art algorithms were not trained or tuned by the authors, so the comparison may favor DNNs; it also notes that the compared architectures may have been overfitted or empirically designed for the UCR/UEA archive.
  • Evident from the text: the multivariate archive contains only 12 datasets, and the statistical test failed to find significant differences among the nine classifiers on that archive; ResNet’s hyperparameters were not tuned per dataset, and random initialization can significantly affect DNN accuracy.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1007/s10618-019-00619-1

Cites

142 of 142 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

64 Not checked yet · 47 Own interpretation · 44 Own result · 22 No basis given · 6 Own method

Verify all 84 references — free account

Show all 97 claims

  • Probably not a substantial claim. 47
  • It may state two separate claims as one. 52
  • The quote only partly states this claim. 2
86 of 86
  • The paper relies on this without support.

    The UCR/UEA archive datasets are representative of TSC problems.

    “we tested the approaches on 12 Multivariate Time Series (MTS) datasets (Baydogan, 2015).”
  • The paper relies on this without support.

    The 97 time series datasets used are sufficient to generalize about DNN performance for TSC.

    “By training 8,730 deep learning models on 97 time series datasets, we propose the most exhaustive study of DNNs for TSC to date.”
  • The paper relies on this without support.

    The deep learning implementations in the framework faithfully represent the original methods.

    “We also provide an open source deep learning framework to the TSC community where we implemented each of the compared approaches and evaluated them on a univariate TSC benchmark (the UCR/UEA archive) and 12 multivariate time series datasets.”
  • The paper relies on this without support.

    The MTS archive contains time series of unequal length.

    “In order to solve the problem of unequal length time series in the MTS archive”
  • The paper relies on this without support.

    CAM visualizations faithfully indicate which time series regions contribute to class identification.

    “Highlighting with the Class Activation Map the contribution of each time series region for the three classes in Meat when using the FCN and ResNet classifiers.”
  • The paper relies on this without support.

    MDS plots with Euclidean distance on GAP vectors preserve class separability sufficiently to interpret model performance.

    “Figure 15 shows three MDS plots for the GunPoint dataset using: (1) the raw input time series (Figure 15a); (2) the learned latent features from the GAP layer for FCN (Figure 15b); and (3)”
6 of 6

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

2 of 2

Citations

Cites

Show all 149 references

Research works printed but not linked: 2

  1. Che Z, He X, Xu K, Liu Y (2017b) DECADE: a deep metric learning model for multivariate time series. In: KDD workshop on mining and learning from time series
  2. Ismail Fawaz H, Forestier G, Weber J, Idoumghar L, Muller PA (2018c) Transfer learning for time series classification. In: IEEE international conference on big data, pp 1367–1376 · DOI · Paper page

Cited by

Sorted by citations

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Metadata

Authors
Ismail Fawaz, H., Forestier, G., Weber, J., Idoumghar, L., & Muller, P.-A.
Affiliations
Université de Haute-Alsace (FR)
Venue
Data Mining and Knowledge Discovery
Published
2019-03-02
Volume
33
Issue
4
Pages
917-963
ISSN
  • 1384-5810 (ISSN-L)
  • 1573-756X
OpenAlex
W2892035503
Cited by
3,342
References
149
Citations by year
2026: 385 · 2025: 493 · 2024: 507 · 2023: 517 · 2022: 527 · 2021: 494 · 2020: 328 · 2019: 85
FWCI
227.10
Type
journal article
Language
en
Open access
Locations
  • Data Mining and Knowledge Discovery (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • HAL Portal Artxiker (Hindustan Aeronautics Limited (India)) (submittedVersion, other-oa)
  • HAL (submittedVersion, other-oa)
  • arXiv (Cornell University)
Funders
Agence Nationale de la Recherche (ANR-17-CE23-0015)
Topics
  • Physical Sciences › Computer Science › Signal Processing › Time Series Analysis and Forecasting
  • Physical Sciences › Computer Science › Signal Processing › Music and Audio Processing
  • Physical Sciences › Computer Science › Artificial Intelligence › Neural Networks and Applications
Keywords
time series classification, deep neural network, deep learning architectures, convolutional neural networks, ResNet, multivariate time series, univariate time series

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