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Data augmentation methods have been shown to be a fundamental technique to improve generalization in tasks such as image, text and audio classification. Recently, automated augmentation methods have led to further improvements on image…

Machine Learning · Computer Science 2021-02-17 Elizabeth Fons , Paula Dawson , Xiao-jun Zeng , John Keane , Alexandros Iosifidis

Data augmentation has been widely used to improve generalizability of machine learning models. However, comparatively little work studies data augmentation for graphs. This is largely due to the complex, non-Euclidean structure of graphs,…

Machine Learning · Computer Science 2020-12-03 Tong Zhao , Yozen Liu , Leonardo Neves , Oliver Woodford , Meng Jiang , Neil Shah

Many researchers have used tag information to improve the performance of recommendation techniques in recommender systems. Examining the tags of users will help to get their interests and leads to more accuracy in the recommendations. Since…

Information Retrieval · Computer Science 2023-10-03 Zeinab Shokrzadeh , Mohammad-Reza Feizi-Derakhshi , Mohammad-Ali Balafar , Jamshid Bagherzadeh-Mohasefi

Data analysis require a pairwise proximity measure over objects. Recent work has extended this to situations where the distance information between objects is given as comparison results of distances between three objects (triplets). Humans…

Machine Learning · Computer Science 2023-02-21 Sarwan Ali , Muhammad Ahmad , Umair ul Hassan , Muhammad Asad Khan , Shafiq Alam , Imdadullah Khan

Deep learning-based text classification models need abundant labeled data to obtain competitive performance. Unfortunately, annotating large-size corpus is time-consuming and laborious. To tackle this, multiple researches try to use data…

Computation and Language · Computer Science 2023-02-03 Xiaotian Lin , Nankai Lin , Yingwen Fu , Ziyu Yang , Shengyi Jiang

Addressing the challenges related to data sparsity, cold-start problems, and diversity in recommendation systems is both crucial and demanding. Many current solutions leverage knowledge graphs to tackle these issues by combining both…

Information Retrieval · Computer Science 2024-03-28 Yejin Kim , Scott Rome , Kevin Foley , Mayur Nankani , Rimon Melamed , Javier Morales , Abhay Yadav , Maria Peifer , Sardar Hamidian , H. Howie Huang

Contrastive learning (CL) recently has spurred a fruitful line of research in the field of recommendation, since its ability to extract self-supervised signals from the raw data is well-aligned with recommender systems' needs for tackling…

Information Retrieval · Computer Science 2022-05-10 Junliang Yu , Hongzhi Yin , Xin Xia , Tong Chen , Lizhen Cui , Quoc Viet Hung Nguyen

Data augmentation uses artificially-created examples to support supervised machine learning, adding robustness to the resulting models and helping to account for limited availability of labelled data. We apply and evaluate a synthetic data…

Digital Libraries · Computer Science 2022-08-25 Peter Organisciak , Maggie Ryan

Recently, recommendation according to sequential user behaviors has shown promising results in many application scenarios. Generally speaking, real-world sequential user behaviors usually reflect a hybrid of sequential influences and…

Information Retrieval · Computer Science 2019-10-18 Xu Chen , Kenan Cui , Ya Zhang , Yanfeng Wang

The core of the general recommender systems lies in learning high-quality embedding representations of users and items to investigate their positional relations in the feature space. Unfortunately, data sparsity caused by…

Information Retrieval · Computer Science 2025-04-24 Yi Zhang , Yiwen Zhang

Most NLP datasets are manually labeled, so suffer from inconsistent labeling or limited size. We propose methods for automatically improving datasets by viewing them as graphs with expected semantic properties. We construct a paraphrase…

Computation and Language · Computer Science 2020-11-04 Hannah Chen , Yangfeng Ji , David Evans

Deep Neural Networks (DNNs) are extensively used in collaborative filtering due to their impressive effectiveness. These systems depend on interaction data to learn user and item embeddings that are crucial for recommendations. However, the…

Information Retrieval · Computer Science 2025-05-06 Yuying Zhao , Xiaodong Yang , Huiyuan Chen , Xiran Fan , Yu Wang , Yiwei Cai , Tyler Derr

In recent years, efforts have been made to use text information for better user profiling and item characterization in recommendations. However, text information can sometimes be of low quality, hindering its effectiveness for real-world…

Artificial Intelligence · Computer Science 2024-02-15 Yingpeng Du , Ziyan Wang , Zhu Sun , Haoyan Chua , Hongzhi Liu , Zhonghai Wu , Yining Ma , Jie Zhang , Youchen Sun

Graph classification, which aims to identify the category labels of graphs, plays a significant role in drug classification, toxicity detection, protein analysis etc. However, the limitation of scale of benchmark datasets makes it easy for…

Social and Information Networks · Computer Science 2020-09-22 Jiajun Zhou , Jie Shen , Qi Xuan

Recommender systems are designed to predict user preferences over collections of items. These systems process users' previous interactions to decide which items should be ranked higher to satisfy their desires. An ensemble recommender…

Information Retrieval · Computer Science 2023-06-23 Alireza Gharahighehi , Celine Vens , Konstantinos Pliakos

Conversational recommender systems (CRSs) enhance recommendation quality by engaging users in multi-turn dialogues, capturing nuanced preferences through natural language interactions. However, these systems often face the false negative…

Information Retrieval · Computer Science 2025-08-11 Haozhe Xu , Xiaohua Wang , Changze Lv , Xiaoqing Zheng

Given a graph dataset, how can we augment it for accurate graph classification? Graph augmentation is an essential strategy to improve the performance of graph-based tasks, and has been widely utilized for analyzing web and social graphs.…

Machine Learning · Computer Science 2022-02-22 Jaemin Yoo , Sooyeon Shim , U Kang

While the abundance of rich and vast datasets across numerous fields has facilitated the advancement of natural language processing, sectors in need of specialized data types continue to struggle with the challenge of finding quality data.…

Computation and Language · Computer Science 2026-02-06 Hyeonseok Kang , Hyein Seo , Jeesu Jung , Sangkeun Jung , Du-Seong Chang , Riwoo Chung

In many cases of machine learning, research suggests that the development of training data might have a higher relevance than the choice and modelling of classifiers themselves. Thus, data augmentation methods have been developed to improve…

Computation and Language · Computer Science 2022-07-25 Markus Bayer , Marc-André Kaufhold , Björn Buchhold , Marcel Keller , Jörg Dallmeyer , Christian Reuter

The growth of recommender systems (RecSys) is driven by digitization and the need for personalized content in areas such as e-commerce and video streaming. The content in these systems often changes rapidly and therefore they constantly…

Information Retrieval · Computer Science 2024-11-15 Shiyu Wang , Hao Ding , Yupeng Gu , Sergul Aydore , Kousha Kalantari , Branislav Kveton