Search Results for author: Fergus Imrie

Found 16 papers, 12 papers with code

Dissecting Sample Hardness: A Fine-Grained Analysis of Hardness Characterization Methods for Data-Centric AI

1 code implementation7 Mar 2024 Nabeel Seedat, Fergus Imrie, Mihaela van der Schaar

Additionally, we propose the Hardness Characterization Analysis Toolkit (H-CAT), which supports comprehensive and quantitative benchmarking of HCMs across the hardness taxonomy and can easily be extended to new HCMs, hardness types, and datasets.

Benchmarking

A Neural Framework for Generalized Causal Sensitivity Analysis

1 code implementation27 Nov 2023 Dennis Frauen, Fergus Imrie, Alicia Curth, Valentyn Melnychuk, Stefan Feuerriegel, Mihaela van der Schaar

Unobserved confounding is common in many applications, making causal inference from observational data challenging.

Causal Inference valid

Redefining Digital Health Interfaces with Large Language Models

1 code implementation5 Oct 2023 Fergus Imrie, Paulius Rauba, Mihaela van der Schaar

We develop a new prognostic tool using automated machine learning and demonstrate how LLMs can provide a unique interface to both our model and existing risk scores, highlighting the benefit compared to traditional interfaces for digital tools.

Machine Learning with Requirements: a Manifesto

no code implementations7 Apr 2023 Eleonora Giunchiglia, Fergus Imrie, Mihaela van der Schaar, Thomas Lukasiewicz

In the recent years, machine learning has made great advancements that have been at the root of many breakthroughs in different application domains.

TANGOS: Regularizing Tabular Neural Networks through Gradient Orthogonalization and Specialization

2 code implementations9 Mar 2023 Alan Jeffares, Tennison Liu, Jonathan Crabbé, Fergus Imrie, Mihaela van der Schaar

In this work, we introduce Tabular Neural Gradient Orthogonalization and Specialization (TANGOS), a novel framework for regularization in the tabular setting built on latent unit attributions.

SurvivalGAN: Generating Time-to-Event Data for Survival Analysis

1 code implementation24 Feb 2023 Alexander Norcliffe, Bogdan Cebere, Fergus Imrie, Pietro Lio, Mihaela van der Schaar

SurvivalGAN outperforms multiple baselines at generating survival data, and in particular addresses the failure modes as measured by the new metrics, in addition to improving downstream performance of survival models trained on the synthetic data.

Fairness Survival Analysis

Improving Adaptive Conformal Prediction Using Self-Supervised Learning

2 code implementations23 Feb 2023 Nabeel Seedat, Alan Jeffares, Fergus Imrie, Mihaela van der Schaar

However, the use of self-supervision beyond model pretraining and representation learning has been largely unexplored.

Conformal Prediction Prediction Intervals +4

DC-Check: A Data-Centric AI checklist to guide the development of reliable machine learning systems

no code implementations9 Nov 2022 Nabeel Seedat, Fergus Imrie, Mihaela van der Schaar

However, this remains a nascent area with no standardized framework to guide practitioners to the necessary data-centric considerations or to communicate the design of data-centric driven ML systems.

Composite Feature Selection using Deep Ensembles

2 code implementations1 Nov 2022 Fergus Imrie, Alexander Norcliffe, Pietro Lio, Mihaela van der Schaar

To do so, we define predictive groups in terms of linear and non-linear interactions between features.

feature selection

AutoPrognosis 2.0: Democratizing Diagnostic and Prognostic Modeling in Healthcare with Automated Machine Learning

1 code implementation21 Oct 2022 Fergus Imrie, Bogdan Cebere, Eoin F. McKinney, Mihaela van der Schaar

However, the use of machine learning introduces a number of technical and practical challenges that have thus far restricted widespread adoption of such techniques in clinical settings.

Continuous-Time Modeling of Counterfactual Outcomes Using Neural Controlled Differential Equations

2 code implementations16 Jun 2022 Nabeel Seedat, Fergus Imrie, Alexis Bellot, Zhaozhi Qian, Mihaela van der Schaar

To assess solutions to this problem, we propose a controllable simulation environment based on a model of tumor growth for a range of scenarios with irregular sampling reflective of a variety of clinical scenarios.

Causal Inference counterfactual +2

Differentiable and Transportable Structure Learning

1 code implementation13 Jun 2022 Jeroen Berrevoets, Nabeel Seedat, Fergus Imrie, Mihaela van der Schaar

Directed acyclic graphs (DAGs) encode a lot of information about a particular distribution in their structure.

To Impute or not to Impute? Missing Data in Treatment Effect Estimation

1 code implementation4 Feb 2022 Jeroen Berrevoets, Fergus Imrie, Trent Kyono, James Jordon, Mihaela van der Schaar

However, no imputation at all also leads to biased estimates, as missingness determined by treatment introduces bias in covariates.

Imputation

Explaining Latent Representations with a Corpus of Examples

1 code implementation NeurIPS 2021 Jonathan Crabbé, Zhaozhi Qian, Fergus Imrie, Mihaela van der Schaar

SimplEx uses the corpus to improve the user's understanding of the latent space with post-hoc explanations answering two questions: (1) Which corpus examples explain the prediction issued for a given test example?

Image Classification Mortality Prediction

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