1 code implementation • 31 May 2023 • Xiaoxin He, Xavier Bresson, Thomas Laurent, Bryan Hooi
Most graph neural network (GNN) pipelines handle these text attributes by transforming them into shallow or hand-crafted features, such as skip-gram or bag-of-words features.
Ranked #1 on
Node Property Prediction
on ogbn-arxiv
(using extra training data)
1 code implementation • 30 May 2023 • Yuwen Li, Miao Xiong, Bryan Hooi
Label errors have been found to be prevalent in popular text, vision, and audio datasets, which heavily influence the safe development and evaluation of machine learning algorithms.
1 code implementation • 23 May 2023 • Shumin Deng, Shengyu Mao, Ningyu Zhang, Bryan Hooi
Event-centric structured prediction involves predicting structured outputs of events.
1 code implementation • 22 May 2023 • Yiwei Wang, Bryan Hooi, Fei Wang, Yujun Cai, Yuxuan Liang, Wenxuan Zhou, Jing Tang, Manjuan Duan, Muhao Chen
In principle, textual context determines the ground-truth relation and the RE models should be able to correctly identify the relations reflected by the textual context.
2 code implementations • 10 May 2023 • Mingqi Yang, Wenjie Feng, Yanming Shen, Bryan Hooi
Proposing an effective and flexible matrix to represent a graph is a fundamental challenge that has been explored from multiple perspectives, e. g., filtering in Graph Fourier Transforms.
Ranked #1 on
Graph Regression
on ZINC
no code implementations • 2 May 2023 • Ailin Deng, Miao Xiong, Bryan Hooi
To overcome this incoherence issue, we design a \emph{neighborhood agreement measure} between latent spaces and find that this agreement is surprisingly well-correlated with the reliability of a model's predictions.
1 code implementation • 17 Apr 2023 • Baixiang Huang, Bryan Hooi, Kai Shu
To bridge this gap, we have constructed a real-world graph-based Traffic Accident Prediction (TAP) data repository, along with two representative tasks: accident occurrence prediction and accident severity prediction.
no code implementations • 25 Feb 2023 • Aashish Kolluri, Sarthak Choudhary, Bryan Hooi, Prateek Saxena
Graph neural networks offer a promising approach to supervised learning over graph data.
1 code implementation • 6 Feb 2023 • Ailin Deng, Shen Li, Miao Xiong, Zhirui Chen, Bryan Hooi
Trustworthy machine learning is of primary importance to the practical deployment of deep learning models.
no code implementations • 30 Jan 2023 • Xu Liu, Yuxuan Liang, Chao Huang, Hengchang Hu, Yushi Cao, Bryan Hooi, Roger Zimmermann
Spatio-temporal graph neural networks (STGNN) have become the most popular solution to traffic forecasting.
no code implementations • CVPR 2023 • Jianqing Xu, Shen Li, Ailin Deng, Miao Xiong, Jiaying Wu, Jiaxiang Wu, Shouhong Ding, Bryan Hooi
Mean ensemble (i. e. averaging predictions from multiple models) is a commonly-used technique in machine learning that improves the performance of each individual model.
3 code implementations • 27 Dec 2022 • Xiaoxin He, Bryan Hooi, Thomas Laurent, Adam Perold, Yann Lecun, Xavier Bresson
First, they capture long-range dependency and mitigate the issue of over-squashing as demonstrated on Long Range Graph Benchmark and TreeNeighbourMatch datasets.
Ranked #1 on
Graph Classification
on Peptides-func
1 code implementation • 29 Nov 2022 • Miao Xiong, Shen Li, Wenjie Feng, Ailin Deng, Jihai Zhang, Bryan Hooi
How do we know when the predictions made by a classifier can be trusted?
1 code implementation • 25 Nov 2022 • Yifan Zhang, Daquan Zhou, Bryan Hooi, Kai Wang, Jiashi Feng
The two criteria are verified to be essential for effective dataset expansion: GIF-SD obtains 13. 5\% higher model accuracy on natural image datasets than unguided expansion with SD.
no code implementations • 24 Oct 2022 • Kaixin Wang, Kuangqi Zhou, Jiashi Feng, Bryan Hooi, Xinchao Wang
In Reinforcement Learning (RL), Laplacian Representation (LapRep) is a task-agnostic state representation that encodes the geometry of the environment.
1 code implementation • 15 Oct 2022 • Juncheng Liu, Bryan Hooi, Kenji Kawaguchi, Xiaokui Xiao
Recently, implicit graph neural networks (GNNs) have been proposed to capture long-range dependencies in underlying graphs.
1 code implementation • 30 Sep 2022 • Shumin Deng, Chengming Wang, Zhoubo Li, Ningyu Zhang, Zelin Dai, Hehong Chen, Feiyu Xiong, Ming Yan, Qiang Chen, Mosha Chen, Jiaoyan Chen, Jeff Z. Pan, Bryan Hooi, Huajun Chen
We release all the open resources (OpenBG benchmarks) derived from it for the community and report experimental results of KG-centric tasks.
no code implementations • 25 Sep 2022 • Nicholas Lim, Bryan Hooi, See-Kiong Ng, Yong Liang Goh
Sparsity of the User-POI matrix is a well established problem for next POI recommendation, which hinders effective learning of user preferences.
1 code implementation • 19 Sep 2022 • Jiaying Wu, Bryan Hooi
As social media becomes a hotbed for the spread of misinformation, the crucial task of rumor detection has witnessed promising advances fostered by open-source benchmark datasets.
no code implementations • 17 Sep 2022 • Yiwei Wang, Bryan Hooi, Yozen Liu, Tong Zhao, Zhichun Guo, Neil Shah
However, HadamardMLP lacks the scalability for retrieving top scoring neighbors on large graphs, since to the best of our knowledge, there does not exist an algorithm to retrieve the top scoring neighbors for HadamardMLP decoders in sublinear complexity.
no code implementations • 23 Aug 2022 • Shen Li, Bryan Hooi
Without exploiting any label information, the principal components recovered store the most informative elements in their \emph{leading} dimensions and leave the negligible in the \emph{trailing} ones, allowing for clear performance improvements of $5\%$-$10\%$ in downstream tasks.
no code implementations • 18 Aug 2022 • Adrien Benamira, Tristan Guérand, Thomas Peyrin, Trevor Yap, Bryan Hooi
We propose $\mathcal{T}$ruth $\mathcal{T}$able net ($\mathcal{TT}$net), a novel Convolutional Neural Network (CNN) architecture that addresses, by design, the open challenges of interpretability, formal verification, and logic gate conversion.
1 code implementation • 15 Jun 2022 • Adam Goodge, Bryan Hooi, See Kiong Ng, Wee Siong Ng
However, the anomaly scoring function is not adaptive to the natural variation in reconstruction error across the range of normal samples, which hinders their ability to detect real anomalies.
no code implementations • Findings (NAACL) 2022 • Yiwei Wang, Muhao Chen, Wenxuan Zhou, Yujun Cai, Yuxuan Liang, Bryan Hooi
GRAPHCACHE aggregates the features from sentences in the whole dataset to learn global representations of properties, and use them to augment the local features within individual sentences.
1 code implementation • NAACL 2022 • Yiwei Wang, Muhao Chen, Wenxuan Zhou, Yujun Cai, Yuxuan Liang, Dayiheng Liu, Baosong Yang, Juncheng Liu, Bryan Hooi
In this paper, we propose the CORE (Counterfactual Analysis based Relation Extraction) debiasing method that guides the RE models to focus on the main effects of textual context without losing the entity information.
1 code implementation • 6 May 2022 • Aashish Kolluri, Teodora Baluta, Bryan Hooi, Prateek Saxena
In this paper, we present a new neural network architecture called LPGNet for training on graphs with privacy-sensitive edges.
no code implementations • Findings (NAACL) 2022 • Juncheng Liu, Zequn Sun, Bryan Hooi, Yiwei Wang, Dayiheng Liu, Baosong Yang, Xiaokui Xiao, Muhao Chen
We study dangling-aware entity alignment in knowledge graphs (KGs), which is an underexplored but important problem.
1 code implementation • NeurIPS 2021 • Juncheng Liu, Kenji Kawaguchi, Bryan Hooi, Yiwei Wang, Xiaokui Xiao
Motivated by this limitation, we propose a GNN model with infinite depth, which we call Efficient Infinite-Depth Graph Neural Networks (EIGNN), to efficiently capture very long-range dependencies.
2 code implementations • 16 Feb 2022 • Shumin Deng, Ningyu Zhang, Bryan Hooi
Knowledge Extraction (KE), aiming to extract structural information from unstructured texts, often suffers from data scarcity and emerging unseen types, i. e., low-resource scenarios.
no code implementations • 30 Jan 2022 • Kaixin Wang, Navdeep Kumar, Kuangqi Zhou, Bryan Hooi, Jiashi Feng, Shie Mannor
The key of this perspective is to decompose the value space, in a state-wise manner, into unions of hypersurfaces.
no code implementations • 18 Dec 2021 • Yiwei Wang, Yujun Cai, Yuxuan Liang, Henghui Ding, Changhu Wang, Bryan Hooi
In this work, we propose the TNS (Time-aware Neighbor Sampling) method: TNS learns from temporal information to provide an adaptive receptive neighborhood for every node at any time.
1 code implementation • 10 Dec 2021 • Adam Goodge, Bryan Hooi, See Kiong Ng, Wee Siong Ng
This allows us to introduce learnability into local outlier methods, in the form of a neural network, for greater flexibility and expressivity: specifically, we propose LUNAR, a novel, graph neural network-based anomaly detection method.
no code implementations • 2 Dec 2021 • Shen Li, Jianqing Xu, Bryan Hooi
This paper proposes a probabilistic contrastive loss function for self-supervised learning.
no code implementations • 1 Dec 2021 • Yiwei Wang, Yujun Cai, Yuxuan Liang, Wei Wang, Henghui Ding, Muhao Chen, Jing Tang, Bryan Hooi
Representing a label distribution as a one-hot vector is a common practice in training node classification models.
no code implementations • NeurIPS 2021 • Yiwei Wang, Yujun Cai, Yuxuan Liang, Henghui Ding, Changhu Wang, Siddharth Bhatia, Bryan Hooi
To address this issue, our idea is to transform the temporal graphs using data augmentation (DA) with adaptive magnitudes, so as to effectively augment the input features and preserve the essential semantic information.
no code implementations • 11 Nov 2021 • Shubhranshu Shekhar, Dhivya Eswaran, Bryan Hooi, Jonathan Elmer, Christos Faloutsos, Leman Akoglu
Given a cardiac-arrest patient being monitored in the ICU (intensive care unit) for brain activity, how can we predict their health outcomes as early as possible?
1 code implementation • NeurIPS 2021 • Koki Kawabata, Siddharth Bhatia, Rui Liu, Mohit Wadhwa, Bryan Hooi
In general, given a data stream of events with seasonal patterns that innovate over time, how can we effectively and efficiently forecast future events?
1 code implementation • 9 Oct 2021 • Yifan Zhang, Bingyi Kang, Bryan Hooi, Shuicheng Yan, Jiashi Feng
Deep long-tailed learning, one of the most challenging problems in visual recognition, aims to train well-performing deep models from a large number of images that follow a long-tailed class distribution.
no code implementations • 29 Sep 2021 • Adrien Benamira, Thomas Peyrin, Bryan Hooi
Moreover, the corresponding SAT conversion method intrinsically leads to formulas with a large number of variables and clauses, impeding interpretability as well as formal verification scalability.
1 code implementation • 26 Aug 2021 • Xu Liu, Yuxuan Liang, Chao Huang, Yu Zheng, Bryan Hooi, Roger Zimmermann
In view of this, one may ask: can we leverage the additional signals from contrastive learning to alleviate data scarcity, so as to benefit STG forecasting?
2 code implementations • 20 Jul 2021 • Yifan Zhang, Bryan Hooi, Lanqing Hong, Jiashi Feng
Existing long-tailed recognition methods, aiming to train class-balanced models from long-tailed data, generally assume the models would be evaluated on the uniform test class distribution.
Ranked #6 on
Long-tail Learning
on iNaturalist 2018
no code implementations • 12 Jul 2021 • Kaixin Wang, Kuangqi Zhou, Qixin Zhang, Jie Shao, Bryan Hooi, Jiashi Feng
It enables learning high-quality Laplacian representations that faithfully approximate the ground truth.
1 code implementation • 29 Jun 2021 • Siddharth Bhatia, Yiwei Wang, Bryan Hooi, Tanmoy Chakraborty
Specifically, the generative model learns to approximate the distribution of anomalous samples from the candidate set of graph snapshots, and the discriminative model detects whether the sampled snapshot is from the ground-truth or not.
1 code implementation • CVPR 2021 • Shen Li, Jianqing Xu, Xiaqing Xu, Pengcheng Shen, Shaoxin Li, Bryan Hooi
Probabilistic Face Embeddings (PFE) is the first attempt to address this dilemma.
1 code implementation • 13 Jun 2021 • Ailin Deng, Bryan Hooi
Given high-dimensional time series data (e. g., sensor data), how can we detect anomalous events, such as system faults and attacks?
1 code implementation • 8 Jun 2021 • Siddharth Bhatia, Mohit Wadhwa, Kenji Kawaguchi, Neil Shah, Philip S. Yu, Bryan Hooi
This higher-order sketch has the useful property of preserving the dense subgraph structure (dense subgraphs in the input turn into dense submatrices in the data structure).
1 code implementation • 7 Jun 2021 • Siddharth Bhatia, Arjit Jain, Shivin Srivastava, Kenji Kawaguchi, Bryan Hooi
Given a stream of entries over time in a multi-dimensional data setting where concept drift is present, how can we detect anomalous activities?
1 code implementation • 1 Jun 2021 • Yiwei Wang, Wei Wang, Yuxuan Liang, Yujun Cai, Bryan Hooi
In this work, we propose the Mixup methods for two fundamental tasks in graph learning: node and graph classification.
Ranked #15 on
Node Classification
on Pubmed
2 code implementations • 4 Apr 2021 • Rui Liu, Siddharth Bhatia, Bryan Hooi
Isconna does not actively explore or maintain pattern snippets; it instead measures the consecutive presence and absence of edge records.
1 code implementation • NeurIPS 2021 • Yifan Zhang, Bryan Hooi, Dapeng Hu, Jian Liang, Jiashi Feng
In this paper, we investigate whether applying contrastive learning to fine-tuning would bring further benefits, and analytically find that optimizing the contrastive loss benefits both discriminative representation learning and model optimization during fine-tuning.
no code implementations • 1 Jan 2021 • Shen Li, Jianqing Xu, Xiaqing Xu, Pengcheng Shen, Shaoxin Li, Bryan Hooi
To address these issues, in this paper, we propose a novel framework for face uncertainty learning in hyperspherical space.
1 code implementation • 30 Dec 2020 • Shimiao Li, Amritanshu Pandey, Bryan Hooi, Christos Faloutsos, Larry Pileggi
Given sensor readings over time from a power grid, how can we accurately detect when an anomaly occurs?
1 code implementation • 13 Dec 2020 • Juncheng Liu, Yiwei Wang, Bryan Hooi, Renchi Yang, Xiaokui Xiao
We argue that the representation power in unlabelled nodes can be useful for active learning and for further improving performance of active learning for node classification.
1 code implementation • 3 Dec 2020 • Nicholas Lim, Bryan Hooi, See-Kiong Ng, Xueou Wang, Yong Liang Goh, Renrong Weng, Rui Tan
Next destination recommendation is an important task in the transportation domain of taxi and ride-hailing services, where users are recommended with personalized destinations given their current origin location.
no code implementations • 26 Nov 2020 • Minji Yoon, Bryan Hooi, Kijung Shin, Christos Faloutsos
This allows us to detect sudden changes in the importance of any node.
1 code implementation • 26 Nov 2020 • Minji Yoon, Théophile Gervet, Bryan Hooi, Christos Faloutsos
We first define a unified framework UNIFIEDGM that integrates various message-passing based graph algorithms, ranging from conventional algorithms like PageRank to graph neural networks.
no code implementations • 6 Oct 2020 • Nicholas Lim, Bryan Hooi, See-Kiong Ng, Xueou Wang, Yong Liang Goh, Renrong Weng, Jagannadan Varadarajan
Next Point-of-Interest (POI) recommendation is a longstanding problem across the domains of Location-Based Social Networks (LBSN) and transportation.
no code implementations • 28 Sep 2020 • Wesley Joon-Wie Tann, Ee-Chien Chang, Bryan Hooi
We introduce the problem of explaining graph generation, formulated as controlling the generative process to produce desired graphs with explainable structures.
no code implementations • 22 Sep 2020 • Yiwei Wang, Wei Wang, Yuxuan Liang, Yujun Cai, Bryan Hooi
We present a new method to regularize graph neural networks (GNNs) for better generalization in graph classification.
1 code implementation • 17 Sep 2020 • Siddharth Bhatia, Arjit Jain, Pan Li, Ritesh Kumar, Bryan Hooi
Given a stream of entries in a multi-aspect data setting i. e., entries having multiple dimensions, how can we detect anomalous activities in an unsupervised manner?
Ranked #1 on
Intrusion Detection
on CIC-DDoS
3 code implementations • 17 Sep 2020 • Siddharth Bhatia, Rui Liu, Bryan Hooi, Minji Yoon, Kijung Shin, Christos Faloutsos
Given a stream of graph edges from a dynamic graph, how can we assign anomaly scores to edges in an online manner, for the purpose of detecting unusual behavior, using constant time and memory?
1 code implementation • 17 Sep 2020 • Siddharth Bhatia, Arjit Jain, Bryan Hooi
Hence, in this work, we propose ExGAN, a GAN-based approach to generate realistic and extreme samples.
no code implementations • 12 Jun 2020 • Manh Tuan Do, Se-eun Yoon, Bryan Hooi, Kijung Shin
Graphs have been utilized as a powerful tool to model pairwise relationships between people or objects.
Social and Information Networks Physics and Society
1 code implementation • 12 Jun 2020 • Kuangqi Zhou, Yanfei Dong, Kaixin Wang, Wee Sun Lee, Bryan Hooi, Huan Xu, Jiashi Feng
In this work, we study performance degradation of GCNs by experimentally examining how stacking only TRANs or PROPs works.
no code implementations • 6 Jun 2020 • Wesley Joon-Wie Tann, Ee-Chien Chang, Bryan Hooi
Given an observed graph and some user-specified Markov model parameters, ${\rm S{\small HADOW}C{\small AST}}$ controls the conditions to generate desired graphs.
4 code implementations • 11 Nov 2019 • Siddharth Bhatia, Bryan Hooi, Minji Yoon, Kijung Shin, Christos Faloutsos
Given a stream of graph edges from a dynamic graph, how can we assign anomaly scores to edges in an online manner, for the purpose of detecting unusual behavior, using constant time and memory?
Ranked #1 on
Anomaly Detection in Edge Streams
on Darpa
2 code implementations • ICLR 2020 • Shen Li, Bryan Hooi, Gim Hee Lee
Yet, most deep generative models do not address the question of identifiability, and thus fail to deliver on the promise of the recovery of the true latent sources that generate the observations.
1 code implementation • 4 Feb 2018 • Kijung Shin, Bryan Hooi, Jisu Kim, Christos Faloutsos
Can we detect it when data are too large to fit in memory or even on a disk?
Databases Distributed, Parallel, and Cluster Computing Social and Information Networks H.2.8
1 code implementation • 6 May 2017 • Shenghua Liu, Bryan Hooi, Christos Faloutsos
Hence, we propose HoloScope, which uses information from graph topology and temporal spikes to more accurately detect groups of fraudulent users.
Social and Information Networks
no code implementations • 30 Mar 2017 • Srijan Kumar, Bryan Hooi, Disha Makhija, Mohit Kumar, Christos Faloutsos, V. S. Subrahamanian
We propose three metrics: (i) the fairness of a user that quantifies how trustworthy the user is in rating the products, (ii) the reliability of a rating that measures how reliable the rating is, and (iii) the goodness of a product that measures the quality of the product.
no code implementations • 19 Nov 2015 • Bryan Hooi, Neil Shah, Alex Beutel, Stephan Gunnemann, Leman Akoglu, Mohit Kumar, Disha Makhija, Christos Faloutsos
To combine these 2 approaches, we formulate our Bayesian Inference for Rating Data (BIRD) model, a flexible Bayesian model of user rating behavior.