no code implementations • 28 Apr 2023 • Jeroen Bollen, Jasper Steegmans, Jan Van den Bussche, Stijn Vansummeren
Graph Neural Networks (GNNs) are a form of deep learning that enable a wide range of machine learning applications on graph-structured data.
no code implementations • 17 Mar 2022 • Floris Geerts, Jasper Steegmans, Jan Van den Bussche
We investigate the power of message-passing neural networks (MPNNs) in their capacity to transform the numerical features stored in the nodes of their input graphs.
no code implementations • 22 Dec 2021 • Thomas Delva, Anastasia Dimou, Maxime Jakubowski, Jan Van den Bussche
In this paper, (i) we define our extraction mechanism formally, building on recently proposed SHACL formalizations; (ii) we establish correctness properties, which relate shape fragments to notions of provenance for database queries; (iii) we compare shape fragments with SPARQL queries; (iv) we discuss implementation options; and (v) we present initial experiments demonstrating that shape fragments are a feasible new idea.
no code implementations • 12 Aug 2016 • Tom J. Ameloot, Jan Van den Bussche
We study a learning principle based on the intuition of forming ramps.
no code implementations • 27 Nov 2015 • Tom J. Ameloot, Jan Van den Bussche
We prove convergence of a cycle-detection learning algorithm on a class of tasks that we call reducible.
no code implementations • 5 Mar 2015 • Angela Bonifati, Werner Nutt, Riccardo Torlone, Jan Van den Bussche
In this paper, we focus on the class of single-function object-creating conjunctive queries, or sifo CQs for short.
no code implementations • 21 Feb 2015 • Tom J. Ameloot, Jan Van den Bussche
Each monotone-regular behavior can be implemented by a positive neural network with a delay of one time unit.
no code implementations • 5 Jun 2014 • Xiaowang Zhang, Jan Van den Bussche, François Picalausa
The satisfiability problem for SPARQL patterns is undecidable in general, since the expressive power of SPARQL 1. 0 is comparable with that of the relational algebra.
no code implementations • 8 May 2014 • Bart Bogaerts, Joost Vennekens, Marc Denecker, Jan Van den Bussche
Cause-effect relations are an important part of human knowledge.