Search Results for author: Yozen Liu

Found 21 papers, 11 papers with code

How Does Message Passing Improve Collaborative Filtering?

no code implementations27 Mar 2024 Mingxuan Ju, William Shiao, Zhichun Guo, Yanfang Ye, Yozen Liu, Neil Shah, Tong Zhao

A branch of research enhances CF methods by message passing used in graph neural networks, due to its strong capabilities of extracting knowledge from graph-structured data, like user-item bipartite graphs that naturally exist in CF.

Collaborative Filtering Recommendation Systems +1

Improving Out-of-Vocabulary Handling in Recommendation Systems

no code implementations27 Mar 2024 William Shiao, Mingxuan Ju, Zhichun Guo, Xin Chen, Evangelos Papalexakis, Tong Zhao, Neil Shah, Yozen Liu

This work focuses on a complementary problem: recommending new users and items unseen (out-of-vocabulary, or OOV) at training time.

Recommendation Systems

USE: Dynamic User Modeling with Stateful Sequence Models

no code implementations20 Mar 2024 Zhihan Zhou, Qixiang Fang, Leonardo Neves, Francesco Barbieri, Yozen Liu, Han Liu, Maarten W. Bos, Ron Dotsch

Furthermore, we introduce a novel training objective named future W-behavior prediction to transcend the limitations of next-token prediction by forecasting a broader horizon of upcoming user behaviors.

Contrastive Learning

Node Duplication Improves Cold-start Link Prediction

no code implementations15 Feb 2024 Zhichun Guo, Tong Zhao, Yozen Liu, Kaiwen Dong, William Shiao, Neil Shah, Nitesh V. Chawla

Graph Neural Networks (GNNs) are prominent in graph machine learning and have shown state-of-the-art performance in Link Prediction (LP) tasks.

Link Prediction Recommendation Systems

Graph Transformers for Large Graphs

1 code implementation18 Dec 2023 Vijay Prakash Dwivedi, Yozen Liu, Anh Tuan Luu, Xavier Bresson, Neil Shah, Tong Zhao

As such, a key innovation of this work lies in the creation of a fast neighborhood sampling technique coupled with a local attention mechanism that encompasses a 4-hop reception field, but achieved through just 2-hop operations.

Graph Learning Graph Property Prediction +3

Context-Aware Prediction of User Engagement on Online Social Platforms

no code implementations23 Oct 2023 Heinrich Peters, Yozen Liu, Francesco Barbieri, Raiyan A. Baten, Sandra C. Matz, Maarten W. Bos

The success of online social platforms hinges on their ability to predict and understand user behavior at scale.

Privacy Preserving

CARL-G: Clustering-Accelerated Representation Learning on Graphs

no code implementations12 Jun 2023 William Shiao, Uday Singh Saini, Yozen Liu, Tong Zhao, Neil Shah, Evangelos E. Papalexakis

CARL-G is adaptable to different clustering methods and CVIs, and we show that with the right choice of clustering method and CVI, CARL-G outperforms node classification baselines on 4/5 datasets with up to a 79x training speedup compared to the best-performing baseline.

Clustering Contrastive Learning +4

Link Prediction with Non-Contrastive Learning

1 code implementation25 Nov 2022 William Shiao, Zhichun Guo, Tong Zhao, Evangelos E. Papalexakis, Yozen Liu, Neil Shah

In this work, we extensively evaluate the performance of existing non-contrastive methods for link prediction in both transductive and inductive settings.

Contrastive Learning Link Prediction +2

Linkless Link Prediction via Relational Distillation

no code implementations11 Oct 2022 Zhichun Guo, William Shiao, Shichang Zhang, Yozen Liu, Nitesh V. Chawla, Neil Shah, Tong Zhao

In this work, to combine the advantages of GNNs and MLPs, we start with exploring direct knowledge distillation (KD) methods for link prediction, i. e., predicted logit-based matching and node representation-based matching.

Knowledge Distillation Link Prediction +1

Empowering Graph Representation Learning with Test-Time Graph Transformation

1 code implementation7 Oct 2022 Wei Jin, Tong Zhao, Jiayuan Ding, Yozen Liu, Jiliang Tang, Neil Shah

In this work, we provide a data-centric view to tackle these issues and propose a graph transformation framework named GTrans which adapts and refines graph data at test time to achieve better performance.

Drug Discovery Graph Representation Learning +1

Flashlight: Scalable Link Prediction with Effective Decoders

no code implementations17 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.

Graph Learning Link Prediction

Graph Data Augmentation for Graph Machine Learning: A Survey

1 code implementation17 Feb 2022 Tong Zhao, Wei Jin, Yozen Liu, Yingheng Wang, Gang Liu, Stephan Günnemann, Neil Shah, Meng Jiang

Overall, our work aims to clarify the landscape of existing literature in graph data augmentation and motivates additional work in this area, providing a helpful resource for researchers and practitioners in the broader graph machine learning domain.

BIG-bench Machine Learning Data Augmentation

GStarX: Explaining Graph Neural Networks with Structure-Aware Cooperative Games

1 code implementation28 Jan 2022 Shichang Zhang, Yozen Liu, Neil Shah, Yizhou Sun

Explaining machine learning models is an important and increasingly popular area of research interest.

Attribute Feature Importance +4

Graph-less Neural Networks: Teaching Old MLPs New Tricks via Distillation

1 code implementation ICLR 2022 Shichang Zhang, Yozen Liu, Yizhou Sun, Neil Shah

Conversely, multi-layer perceptrons (MLPs) have no graph dependency and infer much faster than GNNs, even though they are less accurate than GNNs for node classification in general.

Knowledge Distillation Node Classification +2

Graph Condensation for Graph Neural Networks

2 code implementations ICLR 2022 Wei Jin, Lingxiao Zhao, Shichang Zhang, Yozen Liu, Jiliang Tang, Neil Shah

Given the prevalence of large-scale graphs in real-world applications, the storage and time for training neural models have raised increasing concerns.

A Unified View on Graph Neural Networks as Graph Signal Denoising

1 code implementation5 Oct 2020 Yao Ma, Xiaorui Liu, Tong Zhao, Yozen Liu, Jiliang Tang, Neil Shah

In this work, we establish mathematically that the aggregation processes in a group of representative GNN models including GCN, GAT, PPNP, and APPNP can be regarded as (approximately) solving a graph denoising problem with a smoothness assumption.

Denoising

Data Augmentation for Graph Neural Networks

2 code implementations11 Jun 2020 Tong Zhao, Yozen Liu, Leonardo Neves, Oliver Woodford, Meng Jiang, Neil Shah

Our work shows that neural edge predictors can effectively encode class-homophilic structure to promote intra-class edges and demote inter-class edges in given graph structure, and our main contribution introduces the GAug graph data augmentation framework, which leverages these insights to improve performance in GNN-based node classification via edge prediction.

Data Augmentation General Classification +1

Characterizing and Forecasting User Engagement with In-app Action Graph: A Case Study of Snapchat

1 code implementation2 Jun 2019 Yozen Liu, Xiaolin Shi, Lucas Pierce, Xiang Ren

Here we propose to formalize individual user's in-app action transition patterns as a temporally evolving action graph, and analyze its characteristics in terms of informing future user engagement.

Time Series Analysis

Cannot find the paper you are looking for? You can Submit a new open access paper.