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Recent studies have highlighted the limitations of message-passing based graph neural networks (GNNs), e.g., limited model expressiveness, over-smoothing, over-squashing, etc. To alleviate these issues, Graph Transformers (GTs) have been…

Machine Learning · Computer Science 2023-03-06 Qiheng Mao , Zemin Liu , Chenghao Liu , Jianling Sun

Human-curated knowledge graphs provide critical supportive information to various natural language processing tasks, but these graphs are usually incomplete, urging auto-completion of them. Prevalent graph embedding approaches, e.g.,…

Computation and Language · Computer Science 2021-02-25 Bo Wang , Tao Shen , Guodong Long , Tianyi Zhou , Yi Chang

Adapter-style efficient transfer learning (ETL) has shown excellent performance in the tuning of vision-language models (VLMs) under the low-data regime, where only a few additional parameters are introduced to excavate the task-specific…

Computer Vision and Pattern Recognition · Computer Science 2023-09-26 Xin Li , Dongze Lian , Zhihe Lu , Jiawang Bai , Zhibo Chen , Xinchao Wang

Retrieval-Augmented Generation (RAG) enhances language models by grounding responses in external information, yet explainability remains a critical challenge, particularly when retrieval relies on unstructured text. Knowledge graphs (KGs)…

Machine Learning · Computer Science 2025-07-14 Georgios Balanos , Evangelos Chasanis , Konstantinos Skianis , Evaggelia Pitoura

Knowledge Graph Embedding (KGE) is a popular approach, which aims to represent entities and relations of a knowledge graph in latent spaces. Their representations are known as embeddings. To measure the plausibility of triplets, score…

Artificial Intelligence · Computer Science 2024-07-29 Jiexing Gao , Dmitry Rodin , Vasily Motolygin , Denis Zaytsev

Knowledge graphs have emerged as a popular method for injecting up-to-date, factual knowledge into large language models (LLMs). This is typically achieved by converting the knowledge graph into text that the LLM can process in context.…

Computation and Language · Computer Science 2025-04-10 Elan Markowitz , Krupa Galiya , Greg Ver Steeg , Aram Galstyan

Video-Question-Answering (VideoQA) comprises the capturing of complex visual relation changes over time, remaining a challenge even for advanced Video Language Models (VLM), i.a., because of the need to represent the visual content to a…

Computer Vision and Pattern Recognition · Computer Science 2025-04-09 Sofian Chaybouti , Walid Bousselham , Moritz Wolter , Hilde Kuehne

Transformers have attained outstanding performance across various modalities, owing to their simple but powerful scaled-dot-product (SDP) attention mechanisms. Researchers have attempted to migrate Transformers to graph learning, but most…

Machine Learning · Computer Science 2026-01-30 Liheng Ma , Soumyasundar Pal , Yingxue Zhang , Philip H. S. Torr , Mark Coates

Recurrent Neural Networks were, until recently, one of the best ways to capture the timely dependencies in sequences. However, with the introduction of the Transformer, it has been proven that an architecture with only attention-mechanisms…

Machine Learning · Computer Science 2021-08-19 Radostin Cholakov , Todor Kolev

Graph Neural Networks (GNNs) have been widely applied to various fields due to their powerful representations of graph-structured data. Despite the success of GNNs, most existing GNNs are designed to learn node representations on the fixed…

Machine Learning · Computer Science 2021-06-14 Seongjun Yun , Minbyul Jeong , Sungdong Yoo , Seunghun Lee , Sean S. Yi , Raehyun Kim , Jaewoo Kang , Hyunwoo J. Kim

The simultaneous recognition of multiple objects in one image remains a challenging task, spanning multiple events in the recognition field such as various object scales, inconsistent appearances, and confused inter-class relationships.…

Computer Vision and Pattern Recognition · Computer Science 2021-10-13 Jiawei Zhao , Ke Yan , Yifan Zhao , Xiaowei Guo , Feiyue Huang , Jia Li

Embedding methods transform the knowledge graph into a continuous, low-dimensional space, facilitating inference and completion tasks. Existing methods are mainly divided into two types: translational distance models and semantic matching…

Information Retrieval · Computer Science 2025-03-11 Deepak Banerjee , Anjali Ishaan

Transformers have revolutionized performance in Natural Language Processing and Vision, paving the way for their integration with Graph Neural Networks (GNNs). One key challenge in enhancing graph transformers is strengthening the…

Machine Learning · Computer Science 2026-01-09 Yun Young Choi , Sun Woo Park , Minho Lee , Youngho Woo

Learning representations on large-sized graphs is a long-standing challenge due to the inter-dependence nature involved in massive data points. Transformers, as an emerging class of foundation encoders for graph-structured data, have shown…

Machine Learning · Computer Science 2024-08-19 Qitian Wu , Wentao Zhao , Chenxiao Yang , Hengrui Zhang , Fan Nie , Haitian Jiang , Yatao Bian , Junchi Yan

The success of large pretrained Transformers is closely tied to tokenizers, which convert raw input into discrete symbols. Extending these models to graph-structured data remains a significant challenge. In this work, we introduce a graph…

Machine Learning · Computer Science 2026-03-13 Zeyuan Guo , Enmao Diao , Cheng Yang , Chuan Shi

In recommender systems, most graph-based methods focus on positive user feedback, while overlooking the valuable negative feedback. Integrating both positive and negative feedback to form a signed graph can lead to a more comprehensive…

Information Retrieval · Computer Science 2024-05-07 Sirui Chen , Jiawei Chen , Sheng Zhou , Bohao Wang , Shen Han , Chanfei Su , Yuqing Yuan , Can Wang

The growing interest in Temporal Graph Neural Networks (TGNNs) stems from their ability to model complex dynamics and deliver superior performance. However, TGNNs encounter fundamental challenges in capturing long-term dependencies and…

Machine Learning · Computer Science 2026-05-26 Hongjiang Chen , Pengfei Jiao , Ming Du , Xuan Guo , Zhidong Zhao , Di Jin , Xiao Liu

Knowledge Graph Question Answering (KGQA) systems are based on machine learning algorithms, requiring thousands of question-answer pairs as training examples or natural language processing pipelines that need module fine-tuning. In this…

Artificial Intelligence · Computer Science 2022-02-03 Daniel Vollmers , Rricha Jalota , Diego Moussallem , Hardik Topiwala , Axel-Cyrille Ngonga Ngomo , Ricardo Usbeck

Graph learning has attracted significant attention due to its widespread real-world applications. Current mainstream approaches rely on text node features and obtain initial node embeddings through shallow embedding learning using GNNs,…

Artificial Intelligence · Computer Science 2025-02-13 Chuanqi Shi , Yiyi Tao , Hang Zhang , Lun Wang , Shaoshuai Du , Yixian Shen , Yanxin Shen

Dynamic graph representation learning has emerged as a crucial research area, driven by the growing need for analyzing time-evolving graph data in real-world applications. While recent approaches leveraging recurrent neural networks (RNNs)…

Machine Learning · Computer Science 2024-10-28 Shengxiang Hu , Guobing Zou , Song Yang , Shiyi Lin , Yanglan Gan , Bofeng Zhang