Search Results for author: O-Joun Lee

Found 10 papers, 7 papers with code

Explainable Graph Neural Networks for Observation Impact Analysis in Atmospheric State Estimation

no code implementations26 Mar 2024 Hyeon-Ju Jeon, Jeon-Ho Kang, In-Hyuk Kwon, O-Joun Lee

This paper investigates the impact of observations on atmospheric state estimation in weather forecasting systems using graph neural networks (GNNs) and explainability methods.

Weather Forecasting

CloudNine: Analyzing Meteorological Observation Impact on Weather Prediction Using Explainable Graph Neural Networks

no code implementations21 Feb 2024 Hyeon-Ju Jeon, Jeon-Ho Kang, In-Hyuk Kwon, O-Joun Lee

Combining an XGNN-based atmospheric state estimation model with a numerical weather prediction model, we provide a web application to search for observations in the 3D space of the Earth system and to visualize the impact of individual observations on predictions in specific spatial regions and time periods.

Weather Forecasting

A Survey on Structure-Preserving Graph Transformers

no code implementations29 Jan 2024 Van Thuy Hoang, O-Joun Lee

The transformer architecture has shown remarkable success in various domains, such as natural language processing and computer vision.

Graph Learning

Mitigating Degree Biases in Message Passing Mechanism by Utilizing Community Structures

1 code implementation28 Dec 2023 Van Thuy Hoang, O-Joun Lee

In this paper, we propose Community-aware Graph Transformers, namely CGT, to learn degree-unbiased representations based on learnable augmentations and graph transformers by extracting within community structures.

 Ranked #1 on Node Clustering on Pubmed (Conductance metric)

Node Classification Node Clustering +1

Companion Animal Disease Diagnostics based on Literal-aware Medical Knowledge Graph Representation Learning

1 code implementation31 Aug 2023 Van Thuy Hoang, Sang Thanh Nguyen, Sangmyeong Lee, Jooho Lee, Luong Vuong Nguyen, O-Joun Lee

In this paper, we propose a knowledge graph embedding model for the efficient diagnosis of animal diseases, which could learn various types of literal information and graph structure and fuse them into unified representations, namely LiteralKG.

Knowledge Graph Embedding Link Prediction +1

Transitivity-Preserving Graph Representation Learning for Bridging Local Connectivity and Role-based Similarity

3 code implementations18 Aug 2023 Van Thuy Hoang, O-Joun Lee

In this paper, we propose Unified Graph Transformer Networks (UGT) that effectively integrate local and global structural information into fixed-length vector representations.

Graph Representation Learning Isomorphism Testing +4

Connector 0.5: A unified framework for graph representation learning

1 code implementation25 Apr 2023 Thanh Sang Nguyen, Jooho Lee, Van Thuy Hoang, O-Joun Lee

Second, we introduce various graph representation learning models, ranging from shallow to deep graph embedding models.

Graph Embedding Graph Generation +4

Day-Ahead Hourly Solar Irradiance Forecasting Based on Multi-Attributed Spatio-Temporal Graph Convolutional Network

1 code implementation Sensors 2022 Hyeon-Ju Jeon, Min-Woo Choi, O-Joun Lee

By comparing the proposed model with existing models, we also investigated the contributions of (i) the spatial adjacency of the stations, (ii) temporal changes in the meteorological variables, and (iii) the variety of variables to the forecasting performance.

Node Property Prediction Solar Irradiance Forecasting

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