Search Results for author: Chang Wei Tan

Found 15 papers, 11 papers with code

Series2Vec: Similarity-based Self-supervised Representation Learning for Time Series Classification

1 code implementation7 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.

Data Augmentation Representation Learning +4

Improving Position Encoding of Transformers for Multivariate Time Series Classification

1 code implementation26 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).

Anomaly Detection Position +3

Proximity Forest 2.0: A new effective and scalable similarity-based classifier for time series

1 code implementation12 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.

Dynamic Time Warping Time Series +1

FRANS: Automatic Feature Extraction for Time Series Forecasting

no code implementations15 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.

Dimensionality Reduction Meta-Learning +2

Classification of multivariate weakly-labelled time-series with attention

1 code implementation16 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.

Classification EEG +4

MultiRocket: Multiple pooling operators and transformations for fast and effective time series classification

1 code implementation31 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.

General Classification Time Series +2

Time Series Extrinsic Regression

1 code implementation23 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.

regression Time Series +3

Monash University, UEA, UCR Time Series Extrinsic Regression Archive

2 code implementations19 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.

Benchmarking regression +4

Detecting Driver's Distraction using Long-term Recurrent Convolutional Network

no code implementations14 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.

Brain Computer Interface EEG +3

Elastic bands across the path: A new framework and methods to lower bound DTW

1 code implementation29 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.

Clustering Dynamic Time Warping +4

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