Search Results for author: Yuanchen Bei

Found 9 papers, 1 papers with code

Guarding Graph Neural Networks for Unsupervised Graph Anomaly Detection

no code implementations25 Apr 2024 Yuanchen Bei, Sheng Zhou, Jinke Shi, Yao Ma, Haishuai Wang, Jiajun Bu

Recent advances have utilized Graph Neural Networks (GNNs) to learn effective node representations by aggregating information from neighborhoods.

Large Language Model Interaction Simulator for Cold-Start Item Recommendation

no code implementations14 Feb 2024 Feiran Huang, Zhenghang Yang, Junyi Jiang, Yuanchen Bei, Yijie Zhang, Hao Chen

To address this challenge, we propose an LLM Interaction Simulator (LLM-InS) to model users' behavior patterns based on the content aspect.

Collaborative Filtering Language Modelling +2

Multi-Behavior Collaborative Filtering with Partial Order Graph Convolutional Networks

no code implementations12 Feb 2024 Yijie Zhang, Yuanchen Bei, Hao Chen, Qijie Shen, Zheng Yuan, Huan Gong, Senzhang Wang, Feiran Huang, Xiao Huang

POG defines the partial order relation of multiple behaviors and models behavior combinations as weighted edges to merge separate behavior graphs into a joint POG.

Collaborative Filtering Recommendation Systems

Macro Graph Neural Networks for Online Billion-Scale Recommender Systems

1 code implementation26 Jan 2024 Hao Chen, Yuanchen Bei, Qijie Shen, Yue Xu, Sheng Zhou, Wenbing Huang, Feiran Huang, Senzhang Wang, Xiao Huang

Predicting Click-Through Rate (CTR) in billion-scale recommender systems poses a long-standing challenge for Graph Neural Networks (GNNs) due to the overwhelming computational complexity involved in aggregating billions of neighbors.

Recommendation Systems

Reinforcement Neighborhood Selection for Unsupervised Graph Anomaly Detection

no code implementations9 Dec 2023 Yuanchen Bei, Sheng Zhou, Qiaoyu Tan, Hao Xu, Hao Chen, Zhao Li, Jiajun Bu

To address these issues, we utilize the advantages of reinforcement learning in adaptively learning in complex environments and propose a novel method that incorporates Reinforcement neighborhood selection for unsupervised graph ANomaly Detection (RAND).

Graph Anomaly Detection Representation Learning

Alleviating Behavior Data Imbalance for Multi-Behavior Graph Collaborative Filtering

no code implementations12 Nov 2023 Yijie Zhang, Yuanchen Bei, Shiqi Yang, Hao Chen, Zhiqing Li, Lijia Chen, Feiran Huang

To this end, we propose IMGCF, a simple but effective model to alleviate behavior data imbalance for multi-behavior graph collaborative filtering.

Collaborative Filtering Multi-Task Learning +1

Modeling Spatiotemporal Periodicity and Collaborative Signal for Local-Life Service Recommendation

no code implementations22 Sep 2023 Huixuan Chi, Hao Xu, Mengya Liu, Yuanchen Bei, Sheng Zhou, Danyang Liu, Mengdi Zhang

(2) spatiotemporal collaborative signal, which indicates similar users have similar preferences at specific locations and times.

Recommendation Systems

CPDG: A Contrastive Pre-Training Method for Dynamic Graph Neural Networks

no code implementations6 Jul 2023 Yuanchen Bei, Hao Xu, Sheng Zhou, Huixuan Chi, Haishuai Wang, Mengdi Zhang, Zhao Li, Jiajun Bu

Dynamic graph data mining has gained popularity in recent years due to the rich information contained in dynamic graphs and their widespread use in the real world.

Flattened Graph Convolutional Networks For Recommendation

no code implementations25 Sep 2022 Yue Xu, Hao Chen, Zengde Deng, Yuanchen Bei, Feiran Huang

Third, we propose a layer ensemble technique which improves the expressiveness of the learned representations by assembling the layer-wise neighborhood representations at the final layer.

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