Search Results for author: Marta Sales-Pardo

Found 9 papers, 4 papers with code

Human mobility is well described by closed-form gravity-like models learned automatically from data

1 code implementation18 Dec 2023 Oriol Cabanas-Tirapu, Lluís Danús, Esteban Moro, Marta Sales-Pardo, Roger Guimerà

At the other end, we have complex machine learning and deep learning models, with tens of features and thousands of parameters, which predict mobility more accurately than gravity models at the cost of not being interpretable and not providing insight on human behavior.

Fundamental limits to learning closed-form mathematical models from data

no code implementations6 Apr 2022 Oscar Fajardo-Fontiveros, Ignasi Reichardt, Harry R. De Los Rios, Jordi Duch, Marta Sales-Pardo, Roger Guimera

We show that this model-learning problem displays a transition from a low-noise phase in which the true model can be learned, to a phase in which the observation noise is too high for the true model to be learned by any method.

Model Selection

Node metadata can produce predictability transitions in network inference problems

no code implementations26 Mar 2021 Oscar Fajardo-Fontiveros, Marta Sales-Pardo, Roger Guimera

Network inference is the process of learning the properties of complex networks from data.

A Bayesian machine scientist to aid in the solution of challenging scientific problems

1 code implementation25 Apr 2020 Roger Guimera, Ignasi Reichardt, Antoni Aguilar-Mogas, Francesco A Massucci, Manuel Miranda, Jordi Pallares, Marta Sales-Pardo

Closed-form, interpretable mathematical models have been instrumental for advancing our understanding of the world; with the data revolution, we may now be in a position to uncover new such models for many systems from physics to the social sciences.

Position

Network-based models for social recommender systems

no code implementations10 Feb 2020 Antonia Godoy-Lorite, Roger Guimera, Marta Sales-Pardo

With the overwhelming online products available in recent years, there is an increasing need to filter and deliver relevant personalized advice for users.

Recommendation Systems

Tensorial and bipartite block models for link prediction in layered networks and temporal networks

no code implementations5 Mar 2018 Marc Tarres-Deulofeu, Antonia Godoy-Lorite, Roger Guimera, Marta Sales-Pardo

Because our models describe all layers simultaneously, our approach takes full advantage of the information contained in the whole network when making predictions about any particular layer.

Link Prediction

Accurate and scalable social recommendation using mixed-membership stochastic block models

1 code implementation5 Apr 2016 Antonia Godoy-Lorite, Roger Guimera, Cristopher Moore, Marta Sales-Pardo

With ever-increasing amounts of online information available, modeling and predicting individual preferences-for books or articles, for example-is becoming more and more important.

Collaborative Filtering

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