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Graph anomaly detection (GAD) has attracted increasing attention in recent years for identifying malicious samples in a wide range of graph-based applications, such as social media and e-commerce. However, most GAD methods assume identical…

Machine Learning · Computer Science 2025-09-09 Junjun Pan , Yu Zheng , Yue Tan , Yixin Liu

Managing microservice architectures in distributed systems is complex and resource intensive due to the high frequency and dynamic nature of inter service interactions. Accurate prediction of these future interactions can enhance adaptive…

Machine Learning · Computer Science 2025-01-28 Ghazal Khodabandeh , Alireza Ezaz , Majid Babaei , Naser Ezzati-Jivan

Graph Neural Networks (GNNs)-based recommendation algorithms typically assume that training and testing data are drawn from independent and identically distributed (IID) spaces. However, this assumption often fails in the presence of…

Machine Learning · Computer Science 2025-04-03 Chu Zhao , Enneng Yang , Yuliang Liang , Pengxiang Lan , Yuting Liu , Jianzhe Zhao , Guibing Guo , Xingwei Wang

Practical use of neural networks often involves requirements on latency, energy and memory among others. A popular approach to find networks under such requirements is through constrained Neural Architecture Search (NAS). However, previous…

Machine Learning · Computer Science 2022-04-28 Niv Nayman , Yonathan Aflalo , Asaf Noy , Rong Jin , Lihi Zelnik-Manor

Cross-domain recommendation (CDR) mitigates data sparsity and cold-start issues in recommendation systems. While recent CDR approaches using graph neural networks (GNNs) capture complex user-item interactions, they rely on manually designed…

Information Retrieval · Computer Science 2025-04-11 Chendi Ge , Xin Wang , Ziwei Zhang , Yijian Qin , Hong Chen , Haiyang Wu , Yang Zhang , Yuekui Yang , Wenwu Zhu

In this paper, we present Conjoint Attentions (CAs), a class of novel learning-to-attend strategies for graph neural networks (GNNs). Besides considering the layer-wise node features propagated within the GNN, CAs can additionally…

Machine Learning · Computer Science 2021-12-14 Tiantian He , Yew-Soon Ong , Lu Bai

Uncovering rationales behind predictions of graph neural networks (GNNs) has received increasing attention over recent years. Instance-level GNN explanation aims to discover critical input elements, like nodes or edges, that the target GNN…

Machine Learning · Computer Science 2023-09-06 Tianxiang Zhao , Dongsheng Luo , Xiang Zhang , Suhang Wang

Graph classification is a pivotal challenge in machine learning, especially within the realm of graph-based data, given its importance in numerous real-world applications such as social network analysis, recommendation systems, and…

Machine Learning · Computer Science 2024-07-03 Bowen Zhang , Zhichao Huang , Genan Dai , Guangning Xu , Xiaomao Fan , Hu Huang

We introduce Universal Neural Architecture Space (UniNAS), a generic search space for neural architecture search (NAS) which unifies convolutional networks, transformers, and their hybrid architectures under a single, flexible framework.…

Computer Vision and Pattern Recognition · Computer Science 2025-10-08 Ondřej Týbl , Lukáš Neumann

Causal structure learning with data from multiple contexts carries both opportunities and challenges. Opportunities arise from considering shared and context-specific causal graphs enabling to generalize and transfer causal knowledge across…

Machine Learning · Computer Science 2024-10-29 Martin Rabel , Wiebke Günther , Jakob Runge , Andreas Gerhardus

Learning causal relationships solely from observational data often fails to reveal the underlying causal mechanisms due to the vast search space of possible causal graphs, which can grow exponentially, especially for greedy algorithms using…

Artificial Intelligence · Computer Science 2024-07-09 Uzma Hasan , Md Osman Gani

Graph-based Retrieval-Augmented Generation (RAG) systems leverage interconnected knowledge structures to capture complex relationships that flat retrieval struggles with, enabling multi-hop reasoning. Yet most existing graph-based methods…

The assumption of independence between observations (units) in a dataset is prevalent across various methodologies for learning causal graphical models. However, this assumption often finds itself in conflict with real-world data, posing…

Machine Learning · Computer Science 2024-12-31 Alex Chen , Qing Zhou

In computer vision research, the process of automating architecture engineering, Neural Architecture Search (NAS), has gained substantial interest. Due to the high computational costs, most recent approaches to NAS as well as the few…

Computer Vision and Pattern Recognition · Computer Science 2020-10-21 Jovita Lukasik , David Friede , Heiner Stuckenschmidt , Margret Keuper

A central question in neuroscience is how self-organizing dynamic interactions in the brain emerge on their relatively static structural backbone. Due to the complexity of spatial and temporal dependencies between different brain areas,…

Neurons and Cognition · Quantitative Biology 2020-10-15 Simon Wein , Wilhelm Malloni , Ana Maria Tomé , Sebastian M. Frank , Gina-Isabelle Henze , Stefan Wüst , Mark W. Greenlee , Elmar W. Lang

Heterogeneous graph neural architecture search (HGNAS) represents a powerful tool for automatically designing effective heterogeneous graph neural networks. However, existing HGNAS algorithms suffer from inefficient searches and unstable…

Artificial Intelligence · Computer Science 2023-12-15 Haoyuan Dong , Yang Gao , Haishuai Wang , Hong Yang , Peng Zhang

Despite the empirical success of neural architecture search (NAS) in deep learning applications, the optimality, reproducibility and cost of NAS schemes remain hard to assess. In this paper, we propose Generative Adversarial NAS (GA-NAS)…

Machine Learning · Computer Science 2021-06-24 Seyed Saeed Changiz Rezaei , Fred X. Han , Di Niu , Mohammad Salameh , Keith Mills , Shuo Lian , Wei Lu , Shangling Jui

Graph data widely exists in real life, with large amounts of data and complex structures. It is necessary to map graph data to low-dimensional embedding. Graph classification, a critical graph task, mainly relies on identifying the…

Machine Learning · Computer Science 2023-10-26 Yuan Li , Li Liu , Penggang Chen , Youmin Zhang , Guoyin Wang

Unsupervised graph representation learning aims to learn low-dimensional node embeddings without supervision while preserving graph topological structures and node attributive features. Previous graph neural networks (GNN) require a large…

Machine Learning · Computer Science 2020-09-04 Yanqiao Zhu , Yichen Xu , Feng Yu , Shu Wu , Liang Wang

Understanding and modelling the performance of neural architectures is key to Neural Architecture Search (NAS). Performance predictors have seen widespread use in low-cost NAS and achieve high ranking correlations between predicted and…

Machine Learning · Computer Science 2023-04-19 Fred X. Han , Keith G. Mills , Fabian Chudak , Parsa Riahi , Mohammad Salameh , Jialin Zhang , Wei Lu , Shangling Jui , Di Niu