Search Results for author: Augusto Santos

Found 6 papers, 3 papers with code

Inferring the Graph of Networked Dynamical Systems under Partial Observability and Spatially Colored Noise

no code implementations18 Dec 2023 Augusto Santos, Diogo Rente, Rui Seabra, José M. F. Moura

In a Networked Dynamical System (NDS), each node is a system whose dynamics are coupled with the dynamics of neighboring nodes.

Time Series

Learning the Causal Structure of Networked Dynamical Systems under Latent Nodes and Structured Noise

1 code implementation10 Dec 2023 Augusto Santos, Diogo Rente, Rui Seabra, José M. F. Moura

To address the challenge of noise correlation and partial observability, we assign to each pair of nodes a feature vector computed from the time series data of observed nodes.

Causal Inference Time Series

PSO-Convolutional Neural Networks with Heterogeneous Learning Rate

1 code implementation20 May 2022 Nguyen Huu Phong, Augusto Santos, Bernardete Ribeiro

In such framework, the vector of weights of each ConvNet is typically cast as the position of a particle in phase space whereby PSO collaborative dynamics intertwines with Stochastic Gradient Descent (SGD) in order to boost training performance and generalization.

Action Recognition Image Classification +5

Graph Learning Under Partial Observability

no code implementations18 Dec 2019 Vincenzo Matta, Augusto Santos, Ali H. Sayed

Many optimization, inference and learning tasks can be accomplished efficiently by means of decentralized processing algorithms where the network topology (i. e., the graph) plays a critical role in enabling the interactions among neighboring nodes.

Distributed Optimization Graph Learning

Graph Learning over Partially Observed Diffusion Networks: Role of Degree Concentration

no code implementations5 Apr 2019 Vincenzo Matta, Augusto Santos, Ali H. Sayed

This claim is proved for three matrix estimators: i) the Granger estimator that adapts to the partial observability setting the solution that is exact under full observability ; ii) the one-lag correlation matrix; and iii) the residual estimator based on the difference between two consecutive time samples.

Clustering Graph Learning

Cannot find the paper you are looking for? You can Submit a new open access paper.