Search Results for author: Fabio Vandin

Found 13 papers, 9 papers with code

SizeShiftReg: a Regularization Method for Improving Size-Generalization in Graph Neural Networks

1 code implementation16 Jul 2022 Davide Buffelli, Pietro Liò, Fabio Vandin

Previous works have tried to tackle this issue in graph classification by providing the model with inductive biases derived from assumptions on the generative process of the graphs, or by requiring access to graphs from the test domain.

Graph Classification

Graph Representation Learning for Multi-Task Settings: a Meta-Learning Approach

1 code implementation10 Jan 2022 Davide Buffelli, Fabio Vandin

While this approach achieves great results in the single-task setting, the generation of node embeddings that can be used to perform multiple tasks (with performance comparable to single-task models) is still an open problem.

Graph Representation Learning Meta-Learning

odeN: Simultaneous Approximation of Multiple Motif Counts in Large Temporal Networks

1 code implementation19 Aug 2021 Ilie Sarpe, Fabio Vandin

One of the main complications in studying temporal motifs is the large number of motifs that can be built even with a limited number of vertices or edges.

SPRISS: Approximating Frequent $k$-mers by Sampling Reads, and Applications

no code implementations18 Jan 2021 Diego Santoro, Leonardo Pellegrina, Fabio Vandin

The extraction of $k$-mers is a fundamental component in many complex analyses of large next-generation sequencing datasets, including reads classification in genomics and the characterization of RNA-seq datasets.

PRESTO: Simple and Scalable Sampling Techniques for the Rigorous Approximation of Temporal Motif Counts

1 code implementation18 Jan 2021 Ilie Sarpe, Fabio Vandin

The analysis of motifs in temporal networks, called temporal motifs, is becoming an important component in the analysis of modern networked datasets.

Are Graph Convolutional Networks Fully Exploiting the Graph Structure?

no code implementations1 Jan 2021 Davide Buffelli, Fabio Vandin

Graph Convolutional Networks (GCNs) represent the state-of-the-art for many graph related tasks.

A Meta-Learning Approach for Graph Representation Learning in Multi-Task Settings

1 code implementation12 Dec 2020 Davide Buffelli, Fabio Vandin

We show that the embeddings produced by our method can be used to perform multiple tasks with comparable or higher performance than classically trained models.

Graph Representation Learning Meta-Learning

MCRapper: Monte-Carlo Rademacher Averages for Poset Families and Approximate Pattern Mining

1 code implementation16 Jun 2020 Leonardo Pellegrina, Cyrus Cousins, Fabio Vandin, Matteo Riondato

To show the practical use of MCRapper, we employ it to develop an algorithm TFP-R for the task of True Frequent Pattern (TFP) mining.

The Impact of Global Structural Information in Graph Neural Networks Applications

1 code implementation6 Jun 2020 Davide Buffelli, Fabio Vandin

Graph Neural Networks (GNNs) rely on the graph structure to define an aggregation strategy where each node updates its representation by combining information from its neighbours.

Attention-Based Deep Learning Framework for Human Activity Recognition with User Adaptation

1 code implementation6 Jun 2020 Davide Buffelli, Fabio Vandin

We propose a simple and effective transfer-learning based strategy to adapt a model to a specific user, providing an average increment of $6\%$ on the F1 score on the predictions for that user.

Feature Engineering Human Activity Recognition +2

Scalable Distributed Approximation of Internal Measures for Clustering Evaluation

1 code implementation3 Mar 2020 Federico Altieri, Andrea Pietracaprina, Geppino Pucci, Fabio Vandin

The experiments provide evidence that, unlike other heuristics, our estimation strategy not only provides tight theoretical guarantees but is also able to return highly accurate estimations while running in a fraction of the time required by the exact computation, and that its distributed implementation is highly scalable, thus enabling the computation of internal measures for very large datasets for which the exact computation is prohibitive.

Clustering

Efficient algorithms to discover alterations with complementary functional association in cancer

no code implementations26 Mar 2018 Rebecca Sarto Basso, Dorit S. Hochbaum, Fabio Vandin

The availability of quantitative target profiles, from genetic perturbations or from clinical phenotypes, provides additional information that can be leveraged to improve the identification of cancer related gene sets by discovering groups with complementary functional associations with such targets.

Finding the True Frequent Itemsets

no code implementations7 Jan 2013 Matteo Riondato, Fabio Vandin

It requires to identify all itemsets appearing in at least a fraction $\theta$ of a transactional dataset $\mathcal{D}$.

Learning Theory

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