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In open-domain Question Answering (QA), dense retrieval is crucial for finding relevant passages for answer generation. Typically, contrastive learning is used to train a retrieval model that maps passages and queries to the same semantic…

Computation and Language · Computer Science 2024-01-17 Shiqi Wang , Yeqin Zhang , Cam-Tu Nguyen

Recommender systems play a crucial role in mitigating the problem of information overload by suggesting users' personalized items or services. The vast majority of traditional recommender systems consider the recommendation procedure as a…

Information Retrieval · Computer Science 2018-08-13 Xiangyu Zhao , Liang Zhang , Zhuoye Ding , Long Xia , Jiliang Tang , Dawei Yin

Multimodal data has significantly advanced recommendation systems by integrating diverse information sources to model user preferences and item characteristics. However, these systems often struggle with redundant and irrelevant…

Information Retrieval · Computer Science 2025-09-25 Hui Wang , Jinghui Qin , Wushao Wen , Qingling Li , Shanshan Zhong , Zhongzhan Huang

Contrastive learning has shown outstanding performances in both supervised and unsupervised learning, and has recently been introduced to solve weakly supervised learning problems such as semi-supervised learning and noisy label learning.…

Machine Learning · Computer Science 2023-06-08 Jingyi Cui , Weiran Huang , Yifei Wang , Yisen Wang

Learning effective latent representations for users and items is the cornerstone of recommender systems. Traditional approaches rely on user-item interaction data to map users and items into a shared latent space, but the sparsity of…

Information Retrieval · Computer Science 2025-04-24 Hoang V. Dong , Yuan Fang , Hady W. Lauw

Modern music streaming services are heavily based on recommendation engines to serve content to users. Sequential recommendation -- continuously providing new items within a single session in a contextually coherent manner -- has been an…

Information Retrieval · Computer Science 2024-09-12 Pavan Seshadri , Shahrzad Shashaani , Peter Knees

Recommender systems learn from historical user-item interactions to identify preferred items for target users. These observed interactions are usually unbalanced following a long-tailed distribution. Such long-tailed data lead to popularity…

Information Retrieval · Computer Science 2022-11-03 Weijieying Ren , Lei Wang , Kunpeng Liu , Ruocheng Guo , Lim Ee Peng , Yanjie Fu

Sequential recommendation (SR) models are typically trained on user-item interactions which are affected by the system exposure bias, leading to the user preference learned from the biased SR model not being fully consistent with the true…

Information Retrieval · Computer Science 2023-12-13 Jiyuan Yang , Yue Ding , Yidan Wang , Pengjie Ren , Zhumin Chen , Fei Cai , Jun Ma , Rui Zhang , Zhaochun Ren , Xin Xin

Multimodal Sentiment Analysis aims to integrate information from various modalities, such as audio, visual, and text, to make complementary predictions. However, it often struggles with irrelevant or misleading visual and auditory…

Machine Learning · Computer Science 2026-01-19 Xingle Xu , Yongkang Liu , Dexian Cai , Shi Feng , Xiaocui Yang , Daling Wang , Yifei Zhang

Recommender systems guide users through vast amounts of information by suggesting items based on their predicted preferences. Collaborative filtering-based deep learning techniques have regained popularity due to their straightforward…

Machine Learning · Computer Science 2024-09-11 Makbule Gulcin Ozsoy

Recommender systems that learn from implicit feedback often use large volumes of a single type of implicit user feedback, such as clicks, to enhance the prediction of sparse target behavior such as purchases. Using multiple types of…

Information Retrieval · Computer Science 2023-05-10 Xin Xin , Xiangyuan Liu , Hanbing Wang , Pengjie Ren , Zhumin Chen , Jiahuan Lei , Xinlei Shi , Hengliang Luo , Joemon Jose , Maarten de Rijke , Zhaochun Ren

Societal biases are reflected in large pre-trained language models and their fine-tuned versions on downstream tasks. Common in-processing bias mitigation approaches, such as adversarial training and mutual information removal, introduce…

Machine Learning · Computer Science 2023-06-06 Lukas Hauzenberger , Shahed Masoudian , Deepak Kumar , Markus Schedl , Navid Rekabsaz

Deep learning had already demonstrated its power in medical images, including denoising, classification, segmentation, etc. All these applications are proposed to automatically analyze medical images beforehand, which brings more…

Image and Video Processing · Electrical Eng. & Systems 2020-11-05 Shao-Cheng Wen , Yu-Jen Chen , Zihao Liu , Wujie Wen , Xiaowei Xu , Yiyu Shi , Tsung-Yi Ho , Qianjun Jia , Meiping Huang , Jian Zhuang

This paper studies the multi-modal recommendation problem, where the item multi-modality information (e.g., images and textual descriptions) is exploited to improve the recommendation accuracy. Besides the user-item interaction graph,…

Information Retrieval · Computer Science 2023-05-02 Xin Zhou , Hongyu Zhou , Yong Liu , Zhiwei Zeng , Chunyan Miao , Pengwei Wang , Yuan You , Feijun Jiang

Many recommender models have been proposed to investigate how to incorporate multimodal content information into traditional collaborative filtering framework effectively. The use of multimodal information is expected to provide more…

Information Retrieval · Computer Science 2024-08-14 Jinghao Zhang , Guofan Liu , Qiang Liu , Shu Wu , Liang Wang

Intent is a significant latent factor influencing user-item interaction sequences. Prevalent sequence recommendation models that utilize contrastive learning predominantly rely on single-intent representations to direct the training…

Machine Learning · Computer Science 2024-09-16 Junshu Huang , Zi Long , Xianghua Fu , Yin Chen

Sequential recommendation is one of the important branches of recommender system, aiming to achieve personalized recommended items for the future through the analysis and prediction of users' ordered historical interactive behaviors.…

Information Retrieval · Computer Science 2024-05-09 Zeyu Hu , Yuzhi Xiao , Tao Huang , Xuanrong Huo

Modeling user's long-term and short-term interests is crucial for accurate recommendation. However, since there is no manually annotated label for user interests, existing approaches always follow the paradigm of entangling these two…

Information Retrieval · Computer Science 2022-03-01 Yu Zheng , Chen Gao , Jianxin Chang , Yanan Niu , Yang Song , Depeng Jin , Yong Li

Multimodal sentiment analysis (MSA) draws increasing attention with the availability of multimodal data. The boost in performance of MSA models is mainly hindered by two problems. On the one hand, recent MSA works mostly focus on learning…

Machine Learning · Computer Science 2021-11-17 Ying Zeng , Sijie Mai , Haifeng Hu

Multimodal Recommendation (MMR) systems are crucial for modern platforms but are often hampered by inherent noise and uncertainty in modal features, such as blurry images, diverse visual appearances, or ambiguous text. Existing methods…

Information Retrieval · Computer Science 2026-01-28 Xinzhuo Wu , Hongbo Wang , Yuan Lin , Kan Xu , Liang Yang , Hongfei Lin