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Recommender system models often represent various sparse features like users, items, and categorical features via embeddings. A standard approach is to map each unique feature value to an embedding vector. The size of the produced embedding…

Information Retrieval · Computer Science 2020-08-26 Wang-Cheng Kang , Derek Zhiyuan Cheng , Ting Chen , Xinyang Yi , Dong Lin , Lichan Hong , Ed H. Chi

Person re-identification (Re-ID) aims to match person images across different camera views, with occluded Re-ID addressing scenarios where pedestrians are partially visible. While pre-trained vision-language models have shown effectiveness…

Computer Vision and Pattern Recognition · Computer Science 2025-08-08 Rui Zhi , Zhen Yang , Haiyang Zhang

In web environments, user preferences are often refined progressively as users move from browsing broad categories to exploring specific items. However, existing generative recommenders overlook this natural refinement process. Generative…

Information Retrieval · Computer Science 2025-12-01 Tianxin Wei , Xuying Ning , Xuxing Chen , Ruizhong Qiu , Yupeng Hou , Yan Xie , Shuang Yang , Zhigang Hua , Jingrui He

Generative retrieval (GR) has emerged as a transformative paradigm in search and recommender systems, leveraging numeric-based identifier representations to enhance efficiency and generalization. Notably, methods like TIGER employing…

Recommender systems powered by generative models (Gen-RecSys) extend beyond classical item ranking by producing open-ended content, which simultaneously unlocks richer user experiences and introduces new risks. On one hand, these systems…

Information Retrieval · Computer Science 2025-07-11 Yashar Deldjoo , Nikhil Mehta , Maheswaran Sathiamoorthy , Shuai Zhang , Pablo Castells , Julian McAuley

We propose reCSE, a self supervised contrastive learning sentence representation framework based on feature reshaping. This framework is different from the current advanced models that use discrete data augmentation methods, but instead…

Computation and Language · Computer Science 2024-08-27 Fufangchen Zhao , Jian Gao , Danfeng Yan

We propose an end-to-end ensemble method for person re-identification (ReID) to address the problem of overfitting in discriminative models. These models are known to converge easily, but they are biased to the training data in general and…

Computer Vision and Pattern Recognition · Computer Science 2020-10-06 Ayse Serbetci , Yusuf Sinan Akgul

We present Region Similarity Representation Learning (ReSim), a new approach to self-supervised representation learning for localization-based tasks such as object detection and segmentation. While existing work has largely focused on…

Computer Vision and Pattern Recognition · Computer Science 2021-08-20 Tete Xiao , Colorado J Reed , Xiaolong Wang , Kurt Keutzer , Trevor Darrell

Traditional sequential recommendation (SR) methods heavily rely on explicit item IDs to capture user preferences over time. This reliance introduces critical limitations in cold-start scenarios and domain transfer tasks, where unseen items…

Information Retrieval · Computer Science 2025-02-20 Wuhan Chen , Zongwei Wang , Min Gao , Xin Xia , Feng Jiang , Junhao Wen

Generative recommendation is emerging as a powerful paradigm that directly generates item predictions, moving beyond traditional matching-based approaches. However, current methods face two key challenges: token-item misalignment, where…

Information Retrieval · Computer Science 2025-06-24 Chang Liu , Yimeng Bai , Xiaoyan Zhao , Yang Zhang , Fuli Feng , Wenge Rong

Whole slide image (WSI) classification often relies on deep weakly supervised multiple instance learning (MIL) methods to handle gigapixel resolution images and slide-level labels. Yet the decent performance of deep learning comes from…

Computer Vision and Pattern Recognition · Computer Science 2022-07-06 Jiawei Yang , Hanbo Chen , Yu Zhao , Fan Yang , Yao Zhang , Lei He , Jianhua Yao

Recent advances in generative artificial intelligence, particularly large language models (LLMs), have opened new opportunities for enhancing recommender systems (RecSys). Most existing LLM-based RecSys approaches operate in a discrete…

Information Retrieval · Computer Science 2026-02-25 Haohao Qu , Shanru Lin , Yujuan Ding , Yiqi Wang , Wenqi Fan

Large language model (LLM)-based generative list-wise recommendation has advanced rapidly, but decoding remains sequential and thus latency-prone. To accelerate inference without changing the target distribution, speculative decoding (SD)…

Information Retrieval · Computer Science 2026-05-01 Jiaju Chen , Chongming Gao , Chenxiao Fan , Haoyan Liu , Qingpeng Cai , Peng Jiang , Xiangnan He

Person Re-Identification (ReID) remains a challenging problem in computer vision. This work reviews various training paradigm and evaluates the robustness of state-of-the-art ReID models in cross-domain applications and examines the role of…

Computer Vision and Pattern Recognition · Computer Science 2026-01-29 Lakshman Balasubramanian

Real world re-identfication (ReID) algorithms aim to map new observations of an object to previously recorded instances. These systems are often constrained by quantity and size of the stored embeddings. To combat this scaling problem, we…

Computer Vision and Pattern Recognition · Computer Science 2024-05-24 Luke McDermott

With recent advances in large language models (LLMs), there has been emerging numbers of research in developing Semantic IDs based on LLMs to enhance the performance of recommendation systems. However, the dimension of these embeddings…

Information Retrieval · Computer Science 2024-10-15 Taolin Zhang , Junwei Pan , Jinpeng Wang , Yaohua Zha , Tao Dai , Bin Chen , Ruisheng Luo , Xiaoxiang Deng , Yuan Wang , Ming Yue , Jie Jiang , Shu-Tao Xia

Utilizing powerful Large Language Models (LLMs) for generative recommendation has attracted much attention. Nevertheless, a crucial challenge is transforming recommendation data into the language space of LLMs through effective item…

Information Retrieval · Computer Science 2025-10-21 Wenjie Wang , Honghui Bao , Xinyu Lin , Jizhi Zhang , Yongqi Li , Fuli Feng , See-Kiong Ng , Tat-Seng Chua

Sequential recommender systems have become increasingly important in real-world applications that model user behavior sequences to predict their preferences. However, existing sequential recommendation methods predominantly rely on…

Information Retrieval · Computer Science 2025-06-05 Enze Liu , Bowen Zheng , Xiaolei Wang , Wayne Xin Zhao , Jinpeng Wang , Sheng Chen , Ji-Rong Wen

Transformer-based sequential recommenders, such as SASRec or BERT4Rec, typically rely solely on learned item ID embeddings, making them vulnerable to the item cold-start problem, particularly in environments with dynamic item catalogs.…

Information Retrieval · Computer Science 2025-08-27 Jan Malte Lichtenberg , Antonio De Candia , Matteo Ruffini

With the rapid evolution of Large Language Models (LLMs), generative recommendation is gradually reshaping the paradigm of recommender systems. However, most existing methods remain confined to the interaction-driven next-item prediction…

Information Retrieval · Computer Science 2026-04-21 Yang Yu , Lei Kou , Huaikuan Yi , Bin Chen , Yayu Cao , Lei Shen , Chao Zhang , Bing Wang , Xiaoyi Zeng