no code implementations • 5 Mar 2024 • Tina Vartziotis, Ippolyti Dellatolas, George Dasoulas, Maximilian Schmidt, Florian Schneider, Tim Hoffmann, Sotirios Kotsopoulos, Michael Keckeisen
Within our methodology, in order to quantify the sustainability awareness of these AI models, we propose a definition of the code's "green capacity", based on certain sustainability metrics.
no code implementations • 3 Dec 2023 • Dimitris Vartziotis, George Dasoulas, Florian Pausinger
Leveraging advancements in deep learning applied to point processes, this paper explores the use of an auto-regressive \textit{Sequence Extension Mixture Model} (SEMM) for extending finite sequences, by estimating directly the conditional density, instead of the intensity function.
1 code implementation • 26 Feb 2023 • Jiali Cheng, George Dasoulas, Huan He, Chirag Agarwal, Marinka Zitnik
Deleted Edge Consistency ensures that the influence of deleted elements is removed from both model weights and neighboring representations, while Neighborhood Influence guarantees that the remaining model knowledge is preserved after deletion.
1 code implementation • 16 Nov 2022 • Guillaume Salha-Galvan, Johannes F. Lutzeyer, George Dasoulas, Romain Hennequin, Michalis Vazirgiannis
It is still unclear to what extent one can improve CD with GAE and VGAE, especially in the absence of node features.
no code implementations • 7 Sep 2022 • Yasha Ektefaie, George Dasoulas, Ayush Noori, Maha Farhat, Marinka Zitnik
Artificial intelligence for graphs has achieved remarkable success in modeling complex systems, ranging from dynamic networks in biology to interacting particle systems in physics.
1 code implementation • 11 Apr 2022 • Michail Chatzianastasis, Johannes F. Lutzeyer, George Dasoulas, Michalis Vazirgiannis
The GOAT model demonstrates its increased performance in modeling graph metrics that capture complex information, such as the betweenness centrality and the effective size of a node.
1 code implementation • 2 Feb 2022 • Guillaume Salha-Galvan, Johannes F. Lutzeyer, George Dasoulas, Romain Hennequin, Michalis Vazirgiannis
Graph autoencoders (GAE) and variational graph autoencoders (VGAE) emerged as powerful methods for link prediction.
1 code implementation • 5 Oct 2021 • Giannis Nikolentzos, George Dasoulas, Michalis Vazirgiannis
In this paper, we propose a new graph neural network model, so-called $\pi$-GNN which learns a "soft" permutation (i. e., doubly stochastic) matrix for each graph, and thus projects all graphs into a common vector space.
1 code implementation • 11 May 2021 • Michail Chatzianastasis, George Dasoulas, Georgios Siolas, Michalis Vazirgiannis
Neural Architecture Search (NAS) has recently gained increased attention, as a class of approaches that automatically searches in an input space of network architectures.
1 code implementation • 8 Mar 2021 • George Dasoulas, Kevin Scaman, Aladin Virmaux
To address this issue, we derive a theoretical analysis of the Lipschitz continuity of attention modules and introduce LipschitzNorm, a simple and parameter-free normalization for self-attention mechanisms that enforces the model to be Lipschitz continuous.
no code implementations • 17 Feb 2021 • George Dasoulas, Giannis Nikolentzos, Kevin Scaman, Aladin Virmaux, Michalis Vazirgiannis
Machine learning on graph-structured data has attracted high research interest due to the emergence of Graph Neural Networks (GNNs).
1 code implementation • ICLR 2021 • George Dasoulas, Johannes Lutzeyer, Michalis Vazirgiannis
In many domains data is currently represented as graphs and therefore, the graph representation of this data becomes increasingly important in machine learning.
no code implementations • 16 Apr 2020 • Stratis Limnios, George Dasoulas, Dimitrios M. Thilikos, Michalis Vazirgiannis
As a multipartite graph is a combination of bipartite graphs, that are in turn the incidence graphs of hypergraphs, we design k-hypercore decomposition, the hypergraph analogue of k-core degeneracy.
no code implementations • 1 Mar 2020 • George Dasoulas, Giannis Nikolentzos, Kevin Scaman, Aladin Virmaux, Michalis Vazirgiannis
Moreover, on graph classification tasks, we suggest the utilization of the generated structural embeddings for the transformation of an attributed graph structure into a set of augmented node attributes.
no code implementations • 12 Dec 2019 • George Dasoulas, Ludovic Dos Santos, Kevin Scaman, Aladin Virmaux
In this paper, we show that a simple coloring scheme can improve, both theoretically and empirically, the expressive power of Message Passing Neural Networks(MPNNs).
1 code implementation • 13 Jul 2019 • Giannis Nikolentzos, George Dasoulas, Michalis Vazirgiannis
We show that the proposed architecture can identify fundamental graph properties.