Search Results for author: George Dasoulas

Found 16 papers, 9 papers with code

Learn to Code Sustainably: An Empirical Study on LLM-based Green Code Generation

no code implementations5 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.

Code Generation

Learn2Extend: Extending sequences by retaining their statistical properties with mixture models

no code implementations3 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.

Point Processes

GNNDelete: A General Strategy for Unlearning in Graph Neural Networks

1 code implementation26 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.

Multimodal learning with graphs

no code implementations7 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.

Graph Learning Inductive Bias +1

Graph Ordering Attention Networks

1 code implementation11 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.

Node Classification

Permute Me Softly: Learning Soft Permutations for Graph Representations

1 code implementation5 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.

Graph Classification Graph Regression

Graph-based Neural Architecture Search with Operation Embeddings

1 code implementation11 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.

Neural Architecture Search

Lipschitz Normalization for Self-Attention Layers with Application to Graph Neural Networks

1 code implementation8 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.

Deep Attention Graph Attention +1

Ego-based Entropy Measures for Structural Representations on Graphs

no code implementations17 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).

Graph Classification

Learning Parametrised Graph Shift Operators

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.

Graph Classification

Hcore-Init: Neural Network Initialization based on Graph Degeneracy

no code implementations16 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.

Graph Mining

Ego-based Entropy Measures for Structural Representations

no code implementations1 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.

General Classification Graph Classification

Coloring graph neural networks for node disambiguation

no code implementations12 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).

Graph Classification

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