Search Results for author: Ricardo Barata

Found 2 papers, 1 papers with code

Active learning for imbalanced data under cold start

no code implementations16 Jul 2021 Ricardo Barata, Miguel Leite, Ricardo Pacheco, Marco O. P. Sampaio, João Tiago Ascensão, Pedro Bizarro

Modern systems that rely on Machine Learning (ML) for predictive modelling, may suffer from the cold-start problem: supervised models work well but, initially, there are no labels, which are costly or slow to obtain.

Active Learning Fraud Detection

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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