1 code implementation • 7 Dec 2023 • Navid Mohammadi Foumani, Chang Wei Tan, Geoffrey I. Webb, Hamid Rezatofighi, Mahsa Salehi
Our evaluation of Series2Vec on nine large real-world datasets, along with the UCR/UEA archive, shows enhanced performance compared to current state-of-the-art self-supervised techniques for time series.
1 code implementation • 26 May 2023 • Navid Mohammadi Foumani, Chang Wei Tan, Geoffrey I. Webb, Mahsa Salehi
We then proposed a new absolute position encoding method dedicated to time series data called time Absolute Position Encoding (tAPE).
Ranked #1 on Time Series Classification on Heartbeat
2 code implementations • 19 May 2023 • Ali Ismail-Fawaz, Angus Dempster, Chang Wei Tan, Matthieu Herrmann, Lynn Miller, Daniel F. Schmidt, Stefano Berretti, Jonathan Weber, Maxime Devanne, Germain Forestier, Geoffrey I. Webb
The measurement of progress using benchmarks evaluations is ubiquitous in computer science and machine learning.
1 code implementation • 12 Apr 2023 • Matthieu Herrmann, Chang Wei Tan, Mahsa Salehi, Geoffrey I. Webb
Time series classification (TSC) is a challenging task due to the diversity of types of feature that may be relevant for different classification tasks, including trends, variance, frequency, magnitude, and various patterns.
1 code implementation • 6 Feb 2023 • Navid Mohammadi Foumani, Lynn Miller, Chang Wei Tan, Geoffrey I. Webb, Germain Forestier, Mahsa Salehi
Time Series Classification and Extrinsic Regression are important and challenging machine learning tasks.
no code implementations • 24 Jan 2023 • Matthieu Herrmann, Chang Wei Tan, Geoffrey I. Webb
The cost of an alignment of two points is a function of the difference in the values of those points.
no code implementations • 15 Sep 2022 • Alexey Chernikov, Chang Wei Tan, Pablo Montero-Manso, Christoph Bergmeir
Traditionally, features used in TSF are handcrafted, which requires domain knowledge and significant data-engineering work.
1 code implementation • 2021 International Conference on Data Mining Workshops (ICDMW) 2022 • Navid Mohammadi Foumani, Chang Wei Tan, Mahsa Salehi
Time series classification algorithms have been mainly dominated by non-deep learning models.
Ranked #1 on Time Series Classification on pendigits
1 code implementation • 16 Feb 2021 • Surayez Rahman, Chang Wei Tan
This research identifies a gap in weakly-labelled multivariate time-series classification (TSC), where state-of-the-art TSC models do not per-form well.
1 code implementation • 31 Jan 2021 • Chang Wei Tan, Angus Dempster, Christoph Bergmeir, Geoffrey I. Webb
We propose MultiRocket, a fast time series classification (TSC) algorithm that achieves state-of-the-art performance with a tiny fraction of the time and without the complex ensembling structure of many state-of-the-art methods.
1 code implementation • 23 Jun 2020 • Chang Wei Tan, Christoph Bergmeir, Francois Petitjean, Geoffrey I. Webb
This paper studies Time Series Extrinsic Regression (TSER): a regression task of which the aim is to learn the relationship between a time series and a continuous scalar variable; a task closely related to time series classification (TSC), which aims to learn the relationship between a time series and a categorical class label.
2 code implementations • 19 Jun 2020 • Chang Wei Tan, Christoph Bergmeir, Francois Petitjean, Geoffrey I. Webb
We refer to this problem as Time Series Extrinsic Regression (TSER), where we are interested in a more general methodology of predicting a single continuous value, from univariate or multivariate time series.
no code implementations • 14 Apr 2020 • Chang Wei Tan, Mahsa Salehi, Geoffrey Mackellar
In this study we demonstrate a novel Brain Computer Interface (BCI) approach to detect driver distraction events to improve road safety.
no code implementations • 10 Oct 2019 • Chang Wei Tan, Francois Petitjean, Eamonn Keogh, Geoffrey I. Webb
Research into time series classification has tended to focus on the case of series of uniform length.
1 code implementation • 29 Aug 2018 • Chang Wei Tan, Francois Petitjean, Geoffrey I. Webb
One of the key time series classification algorithms, the nearest neighbor algorithm with DTW distance (NN-DTW) is very expensive to compute, due to the quadratic complexity of DTW.