Search Results for author: Michail Chatzianastasis

Found 9 papers, 5 papers with code

Neural Graph Generator: Feature-Conditioned Graph Generation using Latent Diffusion Models

2 code implementations3 Mar 2024 Iakovos Evdaimon, Giannis Nikolentzos, Michail Chatzianastasis, Hadi Abdine, Michalis Vazirgiannis

Graph generation has emerged as a crucial task in machine learning, with significant challenges in generating graphs that accurately reflect specific properties.

Graph Generation

Prot2Text: Multimodal Protein's Function Generation with GNNs and Transformers

1 code implementation25 Jul 2023 Hadi Abdine, Michail Chatzianastasis, Costas Bouyioukos, Michalis Vazirgiannis

These results highlight the transformative impact of multimodal models, specifically the fusion of GNNs and LLMs, empowering researchers with powerful tools for more accurate function prediction of existing as well as first-to-see proteins.

Decoder Protein Function Prediction

Supervised Attention Using Homophily in Graph Neural Networks

no code implementations11 Jul 2023 Michail Chatzianastasis, Giannis Nikolentzos, Michalis Vazirgiannis

Among the different variants of graph neural networks, graph attention networks (GATs) have been applied with great success to different tasks.

Graph Attention Node Classification

What Do GNNs Actually Learn? Towards Understanding their Representations

no code implementations21 Apr 2023 Giannis Nikolentzos, Michail Chatzianastasis, Michalis Vazirgiannis

In recent years, graph neural networks (GNNs) have achieved great success in the field of graph representation learning.

Graph Representation Learning

Neural Architecture Search with Multimodal Fusion Methods for Diagnosing Dementia

no code implementations12 Feb 2023 Michail Chatzianastasis, Loukas Ilias, Dimitris Askounis, Michalis Vazirgiannis

To the best of our knowledge, there is no prior work exploiting a NAS approach and these fusion methods in the task of dementia detection from spontaneous speech.

Neural Architecture Search

Explainable Multilayer Graph Neural Network for Cancer Gene Prediction

1 code implementation20 Jan 2023 Michail Chatzianastasis, Michalis Vazirgiannis, Zijun Zhang

Unlike conventional graph learning on a single biological network, EMGNN uses a multilayered graph neural network to learn from multiple biological networks for accurate cancer gene prediction.

Feature Importance Graph Learning

Weisfeiler and Leman go Hyperbolic: Learning Distance Preserving Node Representations

no code implementations4 Nov 2022 Giannis Nikolentzos, Michail Chatzianastasis, Michalis Vazirgiannis

In recent years, graph neural networks (GNNs) have emerged as a promising tool for solving machine learning problems on graphs.

Graph Classification

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

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

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