Search Results for author: Isak Samsten

Found 7 papers, 6 papers with code

Castor: Competing shapelets for fast and accurate time series classification

1 code implementation19 Mar 2024 Isak Samsten, Zed Lee

The transformation organizes shapelets into groups with varying dilation and allows the shapelets to compete over the time context to construct a diverse feature representation.

Time Series Time Series Classification

Counterfactual Explanations for Time Series Forecasting

1 code implementation12 Oct 2023 Zhendong Wang, Ioanna Miliou, Isak Samsten, Panagiotis Papapetrou

In this paper, we formulate the novel problem of counterfactual generation for time series forecasting, and propose an algorithm, called ForecastCF, that solves the problem by applying gradient-based perturbations to the original time series.

counterfactual Time Series +1

Code quality assessment using transformers

no code implementations17 Sep 2023 Mosleh Mahamud, Isak Samsten

Automatically evaluate the correctness of programming assignments is rather straightforward using unit and integration tests.

Distributional Data Augmentation Methods for Low Resource Language

1 code implementation9 Sep 2023 Mosleh Mahamud, Zed Lee, Isak Samsten

One of the current state-of-the-art text augmentation techniques is easy data augmentation (EDA), which augments the training data by injecting and replacing synonyms and randomly permuting sentences.

Synthetic Data Generation Text Augmentation

Style-transfer counterfactual explanations: An application to mortality prevention of ICU patients

1 code implementation Artificial Intelligence in Medicine 2023 Zhendong Wang, Isak Samsten, Vasiliki Kougia, Panagiotis Papapetrou

In this paper, we propose a counterfactual solution MedSeqCF for preventing the mortality of three cohorts of ICU patients, by representing their electronic health records as medical event sequences, and generating counterfactuals by adopting and employing a text style-transfer technique.

counterfactual Counterfactual Explanation +3

Learning Time Series Counterfactuals via Latent Space Representations

1 code implementation International Conference on Discovery Science 2021 Zhendong Wang, Isak Samsten, Rami Mochaourab, Panagiotis Papapetrou

Counterfactual explanations can provide sample-based explanations of features required to modify from the original sample to change the classification result from an undesired state to a desired state; hence it provides interpretability of the model.

counterfactual Counterfactual Explanation +3

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