Search Results for author: Jeongwhan Choi

Found 16 papers, 10 papers with code

QoS-Aware Graph Contrastive Learning for Web Service Recommendation

no code implementations6 Jan 2024 Jeongwhan Choi, Duksan Ryu

We propose a novel approach called QoS-aware graph contrastive learning (QAGCL) for web service recommendation.

Contrastive Learning

RDGCL: Reaction-Diffusion Graph Contrastive Learning for Recommendation

no code implementations27 Dec 2023 Jeongwhan Choi, Hyowon Wi, Chaejeong Lee, Sung-Bae Cho, Dongha Lee, Noseong Park

Contrastive learning (CL) has emerged as a promising technique for improving recommender systems, addressing the challenge of data sparsity by leveraging self-supervised signals from raw data.

Contrastive Learning Data Integration +1

Learning Flexible Body Collision Dynamics with Hierarchical Contact Mesh Transformer

1 code implementation19 Dec 2023 Youn-Yeol Yu, Jeongwhan Choi, Woojin Cho, Kookjin Lee, Nayong Kim, Kiseok Chang, Chang-Seung Woo, Ilho Kim, Seok-Woo Lee, Joon-Young Yang, Sooyoung Yoon, Noseong Park

These methods are typically designed to i) reduce the computational cost in solving physical dynamics and/or ii) propose techniques to enhance the solution accuracy in fluid and rigid body dynamics.

Polynomial-based Self-Attention for Table Representation learning

no code implementations12 Dec 2023 Jayoung Kim, Yehjin Shin, Jeongwhan Choi, Hyowon Wi, Noseong Park

Structured data, which constitutes a significant portion of existing data types, has been a long-standing research topic in the field of machine learning.

Representation Learning

Graph Convolutions Enrich the Self-Attention in Transformers!

no code implementations7 Dec 2023 Jeongwhan Choi, Hyowon Wi, Jayoung Kim, Yehjin Shin, Kookjin Lee, Nathaniel Trask, Noseong Park

Transformers, renowned for their self-attention mechanism, have achieved state-of-the-art performance across various tasks in natural language processing, computer vision, time-series modeling, etc.

Code Classification speech-recognition +2

Long-term Time Series Forecasting based on Decomposition and Neural Ordinary Differential Equations

no code implementations8 Nov 2023 Seonkyu Lim, Jaehyeon Park, Seojin Kim, Hyowon Wi, Haksoo Lim, Jinsung Jeon, Jeongwhan Choi, Noseong Park

Long-term time series forecasting (LTSF) is a challenging task that has been investigated in various domains such as finance investment, health care, traffic, and weather forecasting.

Time Series Time Series Forecasting +1

Graph Neural Rough Differential Equations for Traffic Forecasting

2 code implementations20 Mar 2023 Jeongwhan Choi, Noseong Park

A prevalent approach in the field is to combine graph convolutional networks and recurrent neural networks for the spatio-temporal processing.

Time Series Traffic Prediction

GREAD: Graph Neural Reaction-Diffusion Networks

1 code implementation25 Nov 2022 Jeongwhan Choi, Seoyoung Hong, Noseong Park, Sung-Bae Cho

In particular, diffusion equations have been widely used for designing the core processing layer of GNNs, and therefore they are inevitably vulnerable to the notorious oversmoothing problem.

Node Classification

Time Series Forecasting with Hypernetworks Generating Parameters in Advance

no code implementations22 Nov 2022 Jaehoon Lee, Chan Kim, Gyumin Lee, Haksoo Lim, Jeongwhan Choi, Kookjin Lee, Dongeun Lee, Sanghyun Hong, Noseong Park

Forecasting future outcomes from recent time series data is not easy, especially when the future data are different from the past (i. e. time series are under temporal drifts).

Time Series Time Series Forecasting

Blurring-Sharpening Process Models for Collaborative Filtering

1 code implementation17 Nov 2022 Jeongwhan Choi, Seoyoung Hong, Noseong Park, Sung-Bae Cho

Various methods have been proposed for collaborative filtering, ranging from matrix factorization to graph convolutional methods.

Collaborative Filtering Recommendation Systems

Prediction-based One-shot Dynamic Parking Pricing

2 code implementations30 Aug 2022 Seoyoung Hong, Heejoo Shin, Jeongwhan Choi, Noseong Park

Owing to the continuous and bijective characteristics of NODEs, in addition, we design a one-shot price optimization method given a pre-trained prediction model, which requires only one iteration to find the optimal solution.

Spatio-Temporal Forecasting

Graph Neural Controlled Differential Equations for Traffic Forecasting

1 code implementation7 Dec 2021 Jeongwhan Choi, Hwangyong Choi, Jeehyun Hwang, Noseong Park

A prevalent approach in the field is to combine graph convolutional networks and recurrent neural networks for the spatio-temporal processing.

Spatio-Temporal Forecasting Time Series Forecasting +1

Linear, or Non-Linear, That is the Question!

2 code implementations14 Nov 2021 Taeyong Kong, Taeri Kim, Jinsung Jeon, Jeongwhan Choi, Yeon-Chang Lee, Noseong Park, Sang-Wook Kim

To our knowledge, we are the first who design a hybrid method and report the correlation between the graph centrality and the linearity/non-linearity of nodes.

Collaborative Filtering Recommendation Systems

Climate Modeling with Neural Diffusion Equations

2 code implementations11 Nov 2021 Jeehyun Hwang, Jeongwhan Choi, Hwangyong Choi, Kookjin Lee, Dongeun Lee, Noseong Park

On the other hand, neural ordinary differential equations (NODEs) are to learn a latent governing equation of ODE from data.

Weather Forecasting

LT-OCF: Learnable-Time ODE-based Collaborative Filtering

2 code implementations8 Aug 2021 Jeongwhan Choi, Jinsung Jeon, Noseong Park

In this work, we extend them based on neural ordinary differential equations (NODEs), because the linear GCN concept can be interpreted as a differential equation, and present the method of Learnable-Time ODE-based Collaborative Filtering (LT-OCF).

Collaborative Filtering Recommendation Systems

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