Xunkai Li

ORCID: 0000-0002-1230-7603
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About
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Research Areas
  • Advanced Graph Neural Networks
  • Recommender Systems and Techniques
  • Complex Network Analysis Techniques
  • Privacy-Preserving Technologies in Data
  • Machine Learning and Data Classification
  • Graph Theory and Algorithms
  • Context-Aware Activity Recognition Systems
  • Machine Learning and Algorithms
  • Gene expression and cancer classification
  • Caching and Content Delivery
  • IoT and Edge/Fog Computing
  • Robotics and Automated Systems
  • RNA modifications and cancer
  • Semantic Web and Ontologies
  • Face and Expression Recognition
  • Wireless Signal Modulation Classification
  • Topic Modeling
  • Security in Wireless Sensor Networks
  • Domain Adaptation and Few-Shot Learning
  • Image and Video Quality Assessment
  • Data Mining Algorithms and Applications
  • Brain Tumor Detection and Classification
  • Wireless Body Area Networks
  • Biomedical Text Mining and Ontologies
  • Bioinformatics and Genomic Networks

Beijing Institute of Technology
2023-2025

Chinese Academy of Medical Sciences & Peking Union Medical College
2023

Shandong University
2020-2023

Graph Machine Learning is essential for understanding and analyzing relational data. However, privacy-sensitive applications demand the ability to efficiently remove sensitive information from trained graph neural networks (GNNs), avoiding unnecessary time space overhead caused by retraining models scratch. To address this issue, Unlearning (GU) has emerged as a critical solution, with potential support dynamic updates in data management systems enable scalable unlearning distributed while...

10.48550/arxiv.2501.02728 preprint EN arXiv (Cornell University) 2025-01-05

The $q$-parameterized magnetic Laplacian serves as the foundation of directed graph (digraph) convolution, enabling this kind digraph neural network (MagDG) to encode node features and structural insights by complex-domain message passing. As a generalization undirected methods, MagDG shows superior capability in modeling intricate web-scale topology. Despite great success achieved existing MagDGs, limitations still exist: (1) Hand-crafted $q$: performance MagDGs depends on selecting an...

10.48550/arxiv.2501.11817 preprint EN arXiv (Cornell University) 2025-01-20

Machine unlearning, as a pivotal technology for enhancing model robustness and data privacy, has garnered significant attention in prevalent web mining applications, especially thriving graph-based scenarios. However, most existing graph unlearning (GU) approaches face challenges due to the intricate interactions among web-scale elements during training: (1) The gradient-driven node entanglement hinders complete knowledge removal response requests; (2) billion-level scenarios present...

10.48550/arxiv.2501.11823 preprint EN arXiv (Cornell University) 2025-01-20

Federated graph learning (FGL) has emerged as a promising paradigm for collaborative machine learning, enabling multiple parties to jointly train models while preserving the privacy of raw data. However, existing FGL methods often overlook model-centric heterogeneous (MHtFGL) problem, which arises in real-world applications, such aggregation from different companies with varying scales and architectures. MHtFGL presents an additional challenge: diversity client model architectures hampers...

10.48550/arxiv.2501.12624 preprint EN arXiv (Cornell University) 2025-01-21

Dynamic graphs (DGs), which capture time-evolving relationships between graph entities, have widespread real-world applications. To efficiently encode DGs for downstream tasks, most dynamic neural networks follow the traditional message-passing mechanism and extend it with time-based techniques. Despite their effectiveness, growth of historical interactions introduces significant scalability issues, particularly in industry scenarios. address this limitation, we propose ScaDyG, core idea...

10.48550/arxiv.2501.16002 preprint EN arXiv (Cornell University) 2025-01-27

The embedded representation and clustering tasks both play important roles in relational data analysis mining. Traditional methods mainly employ graph structure to describe data, but intuitive pairwise connections among nodes are insufficient model high-order the real-world, such as relations between proteins polypeptide chains. Hypergraphs a generalization of graphs, hypergraphs can well data. When modeling real world, often accompanied by node attributes, i.e. attributed hypergraphs....

10.1109/tkde.2021.3108192 article EN IEEE Transactions on Knowledge and Data Engineering 2021-01-01

Graph clustering is a fundamental task in data analysis and has attracted considerable attention recommendation systems, mapping knowledge domain, biological science. Because graph convolution very effective combining the feature information topology of data, some methods based on have achieved superior performance. However, current lack consideration structured process convolution. Specifically, most existing ignore implicit interaction between information, stacking small number...

10.1109/access.2020.3020192 article EN cc-by IEEE Access 2020-01-01

Federated Graph Learning (FGL) is a distributed machine learning paradigm that enables collaborative training on large-scale subgraphs across multiple local systems. Existing FGL studies fall into two categories: (i) Optimization, which improves multi-client in existing models; (ii) Model, enhances performance with complex models and interactions. However, most optimization strategies are designed specifically for the computer vision domain ignore graph structure, presenting dissatisfied...

10.14778/3617838.3617842 article EN Proceedings of the VLDB Endowment 2023-09-01

Recently, recommender systems based on Graph Convolution Network (GCN) have become a research hotspot, especially in collaborative filtering. However, most GCN-based models inferior embedding propagation mechanism, leading to low information extraction efficiency. Besides, the existing methods suffer from high computational complexity for large user-item interaction graphs. In order solve above problems, we propose LII-GCCF that integrates Linear transformation, Initial residual and Identity...

10.1109/access.2021.3083600 article EN cc-by IEEE Access 2021-01-01

Most existing graph neural networks (GNNs) are limited to undirected graphs, whose restricted scope of the captured relational information hinders their expressive capabilities and deployments in real-world scenarios. Compared with directed graphs (digraphs) fit demand for modeling more complex topological systems by capturing intricate relationships between nodes, such as formulating transportation financial networks. While some GNNs have been introduced, inspiration mainly comes from deep...

10.48550/arxiv.2401.11772 preprint EN other-oa arXiv (Cornell University) 2024-01-01

With the rapid advancement of AI applications, growing needs for data privacy and model robustness have highlighted importance machine unlearning, especially in thriving graph-based scenarios. However, most existing graph unlearning strategies primarily rely on well-designed architectures or manual process, rendering them less user-friendly posing challenges terms deployment efficiency. Furthermore, striking a balance between performance framework generalization is also pivotal concern. To...

10.48550/arxiv.2401.11760 preprint EN other-oa arXiv (Cornell University) 2024-01-01

Federated Graph Learning (FGL) is a distributed machine learning paradigm that enables collaborative training on large-scale subgraphs across multiple local systems. Existing FGL studies fall into two categories: (i) Optimization, which improves multi-client in existing models; (ii) Model, enhances performance with complex models and interactions. However, most optimization strategies are designed specifically for the computer vision domain ignore graph structure, presenting dissatisfied...

10.48550/arxiv.2401.11755 preprint EN other-oa arXiv (Cornell University) 2024-01-01

Recently, Federated Graph Learning (FGL) has attracted significant attention as a distributed framework based on graph neural networks, primarily due to its capability break data silos. Existing FGL studies employ community split the homophilous global by default simulate federated semi-supervised node classification settings. Such strategy assumes consistency of topology between multi-client subgraphs and graph, where connected nodes are highly likely possess similar feature distributions...

10.48550/arxiv.2401.11750 preprint EN other-oa arXiv (Cornell University) 2024-01-01

Scalable graph neural networks (GNNs) have emerged as a promising technique, which exhibits superior predictive performance and high running efficiency across numerous large-scale graph-based web applications. However, (i) Most scalable GNNs tend to treat all nodes in graphs with the same propagation rules, neglecting their topological uniqueness; (ii) Existing node-wise optimization strategies are insufficient on web-scale intricate topology, where full portrayal of nodes' local properties...

10.48550/arxiv.2402.06128 preprint EN arXiv (Cornell University) 2024-02-08

With the rapid advancement of AI applications, growing needs for data privacy and model robustness have highlighted importance machine unlearning, especially in thriving graph-based scenarios. However, most existing graph unlearning strategies primarily rely on well-designed architectures or manual process, rendering them less user-friendly posing challenges terms deployment efficiency. Furthermore, striking a balance between performance framework generalization is also pivotal concern. To...

10.1609/aaai.v38i12.29273 article EN Proceedings of the AAAI Conference on Artificial Intelligence 2024-03-24

Subgraph federated learning (subgraph-FL) is a new distributed paradigm that facilitates the collaborative training of graph neural networks (GNNs) by multi-client subgraphs. Unfortunately, significant challenge subgraph-FL arises from subgraph heterogeneity, which stems node and topology variation, causing impaired performance global GNN. Despite various studies, they have not yet thoroughly investigated impact mechanism heterogeneity. To this end, we decouple revealing correspond to...

10.48550/arxiv.2404.14061 preprint EN arXiv (Cornell University) 2024-04-22

Graph Neural Networks (GNNs) have demonstrated effectiveness in various graph-based tasks. However, their inefficiency training and inference presents challenges for scaling up to real-world large-scale graph applications. To address the critical challenges, a range of algorithms been proposed accelerate GNNs, attracting increasing attention from research community. In this paper, we present systematic review acceleration which can be categorized into three main topics based on purpose:...

10.48550/arxiv.2405.04114 preprint EN arXiv (Cornell University) 2024-05-07

Most existing graph neural networks (GNNs) are limited to undirected graphs, whose restricted scope of the captured relational information hinders their expressive capabilities and deployment. Compared with directed graphs (digraphs) fit demand for modeling more complex topological systems by capturing intricate relationships between nodes. While some GNNs have been introduced, inspiration mainly comes from deep learning architectures, which lead redundant complexity computation, making them...

10.14778/3654621.3654623 article EN Proceedings of the VLDB Endowment 2024-03-01

10.1109/icde60146.2024.00198 article EN 2022 IEEE 38th International Conference on Data Engineering (ICDE) 2024-05-13
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