Search Results for author: João Bravo

Found 4 papers, 2 papers with code

Adversarial training for tabular data with attack propagation

no code implementations28 Jul 2023 Tiago Leon Melo, João Bravo, Marco O. P. Sampaio, Paolo Romano, Hugo Ferreira, João Tiago Ascensão, Pedro Bizarro

Adversarial attacks are a major concern in security-centered applications, where malicious actors continuously try to mislead Machine Learning (ML) models into wrongly classifying fraudulent activity as legitimate, whereas system maintainers try to stop them.

Feature Engineering Fraud Detection

FairGBM: Gradient Boosting with Fairness Constraints

1 code implementation16 Sep 2022 André F Cruz, Catarina Belém, Sérgio Jesus, João Bravo, Pedro Saleiro, Pedro Bizarro

Tabular data is prevalent in many high-stakes domains, such as financial services or public policy.

Decision Making Fairness

Understanding Unfairness in Fraud Detection through Model and Data Bias Interactions

no code implementations13 Jul 2022 José Pombal, André F. Cruz, João Bravo, Pedro Saleiro, Mário A. T. Figueiredo, Pedro Bizarro

The unparalleled ability of machine learning algorithms to learn patterns from data also enables them to incorporate biases embedded within.

Decision Making Fairness +1

ARMS: Automated rules management system for fraud detection

1 code implementation14 Feb 2020 David Aparício, Ricardo Barata, João Bravo, João Tiago Ascensão, Pedro Bizarro

We propose ARMS, an automated rules management system that evaluates the contribution of individual rules and optimizes the set of active rules using heuristic search and a user-defined loss-function.

Fraud Detection Management

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