Anomaly detection in the dynamics of web and social networks

2 code implementations • 22 Jan 2019 • Volodymyr Miz, Benjamin Ricaud, Kirell Benzi, Pierre Vandergheynst

We define an anomaly as a localized increase in temporal activity in a cluster of nodes.

Anomaly Detection Time Series +1

Wikipedia graph mining: dynamic structure of collective memory

1 code implementation • 1 Oct 2017 • Volodymyr Miz, Kirell Benzi, Benjamin Ricaud, Pierre Vandergheynst

The model exploits collective effect of the dynamics to discover events.

Event Extraction Graph Mining +3

FMA: A Dataset For Music Analysis

16 code implementations • ISMIR 2017 • Michaël Defferrard, Kirell Benzi, Pierre Vandergheynst, Xavier Bresson

We introduce the Free Music Archive (FMA), an open and easily accessible dataset suitable for evaluating several tasks in MIR, a field concerned with browsing, searching, and organizing large music collections.

Song Recommendation with Non-Negative Matrix Factorization and Graph Total Variation

1 code implementation • 8 Jan 2016 • Kirell Benzi, Vassilis Kalofolias, Xavier Bresson, Pierre Vandergheynst

This work formulates a novel song recommender system as a matrix completion problem that benefits from collaborative filtering through Non-negative Matrix Factorization (NMF) and content-based filtering via total variation (TV) on graphs.

Collaborative Filtering Matrix Completion +1