4 papers
The Powers of Precision: Structure-Informed Detection in Complex Systems -- From Customer Churn to Seizure Onset
Augusto Santos, Teresa Santos, Catarina Rodrigues +1
Emergent phenomena -- onset of epileptic seizures, sudden customer churn, or pandemic outbreaks -- often arise from hidden causal interactions in complex systems. We propose a mach…
Inferring the Graph Structure of Images for Graph Neural Networks
Mayur S Gowda, John Shi, Augusto Santos +1
Image datasets such as MNIST are a key benchmark for testing Graph Neural Network (GNN) architectures. The images are traditionally represented as a grid graph with each node repre…
Inferring the Graph of Networked Dynamical Systems under Partial Observability and Spatially Colored Noise
Augusto Santos, Diogo Rente, Rui Seabra +1
In a Networked Dynamical System (NDS), each node is a system whose dynamics are coupled with the dynamics of neighboring nodes. The global dynamics naturally builds on this network…
Learning the Causal Structure of Networked Dynamical Systems under Latent Nodes and Structured Noise
Augusto Santos, Diogo Rente, Rui Seabra +1
This paper considers learning the hidden causal network of a linear networked dynamical system (NDS) from the time series data at some of its nodes -- partial observability. The dy…