Search Results for author: Pedro Ribeiro

Found 9 papers, 3 papers with code

The GANfather: Controllable generation of malicious activity to improve defence systems

no code implementations25 Jul 2023 Ricardo Ribeiro Pereira, Jacopo Bono, João Tiago Ascensão, David Aparício, Pedro Ribeiro, Pedro Bizarro

In the former, our method moves cumulative amounts close to 350 thousand dollars through a network of accounts without being detected by an existing system.

Recommendation Systems

From random-walks to graph-sprints: a low-latency node embedding framework on continuous-time dynamic graphs

no code implementations17 Jul 2023 Ahmad Naser Eddin, Jacopo Bono, David Aparício, Hugo Ferreira, João Ascensão, Pedro Ribeiro, Pedro Bizarro

We demonstrate that our graph-sprints features, combined with a machine learning classifier, achieve competitive performance (outperforming all baselines for the node classification tasks in five datasets).

Graph Representation Learning Node Classification

Anti-Money Laundering Alert Optimization Using Machine Learning with Graphs

no code implementations14 Dec 2021 Ahmad Naser Eddin, Jacopo Bono, David Aparício, David Polido, João Tiago Ascensão, Pedro Bizarro, Pedro Ribeiro

Money laundering is a global problem that concerns legitimizing proceeds from serious felonies (1. 7-4 trillion euros annually) such as drug dealing, human trafficking, or corruption.

BIG-bench Machine Learning

Novel Features for Time Series Analysis: A Complex Networks Approach

1 code implementation11 Oct 2021 Vanessa Freitas Silva, Maria Eduarda Silva, Pedro Ribeiro, Fernando Silva

Our results are very promising, with network features from different mapping methods capturing different properties of the time series, adding a different and rich feature set to the literature.

Clustering Time Series +1

Time Series Analysis via Network Science: Concepts and Algorithms

no code implementations11 Oct 2021 Vanessa Freitas Silva, Maria Eduarda Silva, Pedro Ribeiro, Fernando Silva

These methods involve transforming an initial time series data set into one or more networks, which can be analyzed in depth to provide insight into the original time series.

Time Series Time Series Analysis

Symmetry-induced even/odd parity in charge and heat pumping

no code implementations22 Dec 2020 Miguel A. N. Araújo, Pedro Ninhos, Pedro Ribeiro

It is shown that the presence of discrete symmetries in Floquet systems connected to metallic reservoirs imprints a definite parity on the charge and heat pumping as a function of the reservoir's chemical potential, $\mu$.

Mesoscale and Nanoscale Physics Strongly Correlated Electrons Quantum Physics

GoT-WAVE: Temporal network alignment using graphlet-orbit transitions

no code implementations24 Aug 2018 David Aparício, Pedro Ribeiro, Tijana Milenković, Fernando Silva

Dynamic GDVs (DGDVs) were used as a dynamic NC measure within the first-ever algorithms for GPNA of temporal networks: DynaMAGNA++ and DynaWAVE.

Interaction-tuned Anderson versus Mott localization

1 code implementation4 May 2016 Andrey E. Antipov, Younes Javanmard, Pedro Ribeiro, Stefan Kirchner

Disorder or sufficiently strong interactions can render a metallic state unstable causing it to turn into an insulating one.

Strongly Correlated Electrons Disordered Systems and Neural Networks

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