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Semantic ID (SID)-based recommendation is a promising paradigm for scaling sequential recommender systems, but existing methods largely follow a semantic-centric pipeline: item embeddings are learned from foundation models and discretized…

Information Retrieval · Computer Science 2026-02-03 Yu Liang , Zhongjin Zhang , Yuxuan Zhu , Kerui Zhang , Zhiluohan Guo , Wenhang Zhou , Zonqi Yang , Kangle Wu , Yabo Ni , Anxiang Zeng , Cong Fu , Jianxin Wang , Jiazhi Xia

Semantic IDs (SIDs) define the generation space of generative recommendation and directly determine its personalization ceiling. However, existing tokenizers are trained independently with retrieval objectives, leaving personalization…

Information Retrieval · Computer Science 2026-05-25 Shuli Wang

Generative recommendation maps each item to a sequence of Semantic IDs (SIDs) and recasts retrieval as autoregressive token generation. In this paradigm the main bottleneck is the tokenizer rather than the Transformer: residual vector…

Information Retrieval · Computer Science 2026-05-07 Wenzhuo Cheng , Menghang Gong , Qixin Guo , Hang Zheng , Zhaobin Yang , Jianguo Lou , Zhengwei Zheng

While instruction-tuned language models have demonstrated impressive zero-shot generalization, these models often struggle to generate accurate responses when faced with instructions that fall outside their training set. This paper presents…

Computation and Language · Computer Science 2024-02-20 Taehyeon Kim , Joonkee Kim , Gihun Lee , Se-Young Yun

Sequential recommendation (SR) learns user preferences based on their historical interaction sequences and provides personalized suggestions. In real-world scenarios, most users can only interact with a handful of items, while the majority…

Information Retrieval · Computer Science 2026-01-19 Yizhou Dang , Zhifu Wei , Minhan Huang , Lianbo Ma , Jianzhe Zhao , Guibing Guo , Xingwei Wang

Large Language Model-based Recommender Systems (LRSs) have recently emerged as a new paradigm in sequential recommendation by directly adopting LLMs as backbones. While LRSs demonstrate strong knowledge utilization and instruction-following…

Information Retrieval · Computer Science 2026-03-16 Jiaming Zhang , Yuyuan Li , Xiaohua Feng , Li Zhang , Longfei Li , Jun Zhou , Chaochao Chen

Semantic IDs are discrete identifiers generated by quantizing the Multi-modal Large Language Models (MLLMs) embeddings, enabling efficient multi-modal content integration in recommendation systems. However, their lack of collaborative…

Information Retrieval · Computer Science 2025-11-25 Wencai Ye , Mingjie Sun , Shaoyun Shi , Peng Wang , Wenjin Wu , Peng Jiang

Recent advancements in generative models have allowed the emergence of a promising paradigm for recommender systems (RS), known as Generative Recommendation (GR), which tries to unify rich item semantics and collaborative filtering signals.…

Artificial Intelligence · Computer Science 2025-10-06 Jingzhe Liu , Liam Collins , Jiliang Tang , Tong Zhao , Neil Shah , Clark Mingxuan Ju

Deep neural networks have demonstrated remarkable advancements in various fields using large, well-annotated datasets. However, real-world data often exhibit long-tailed distributions and label noise, significantly degrading generalization…

Computer Vision and Pattern Recognition · Computer Science 2024-07-25 Jae Soon Baik , In Young Yoon , Kun Hoon Kim , Jun Won Choi

Class imbalance and noisy labels are the norm rather than the exception in many large-scale classification datasets. Nevertheless, most works in machine learning typically assume balanced and clean data. There have been some recent attempts…

Computer Vision and Pattern Recognition · Computer Science 2021-09-14 Shyamgopal Karthik , Jérome Revaud , Boris Chidlovskii

Sequential Recommendation (SR) learns user preferences from their historical interaction sequences and provides personalized suggestions. In real-world scenarios, most items exhibit sparse interactions, known as the tail-item problem. This…

Information Retrieval · Computer Science 2026-04-07 Zhifu Wei , Yizhou Dang , Guibing Guo , Chuang Zhao , Zhu Sun

Session-based recommendation (SBR) aims to predict anonymous users' next interaction based on their interaction sessions. In the practical recommendation scenario, low-exposure items constitute the majority of interactions, creating a…

Information Retrieval · Computer Science 2026-01-19 Xiao Wang , Ke Qin , Dongyang Zhang , Xiurui Xie , Shuang Liang

The development of deep learning based image representation learning (IRL) methods has attracted great attention for various image understanding problems. Most of these methods require the availability of a high quantity and quality of…

Computer Vision and Pattern Recognition · Computer Science 2023-08-07 Gencer Sumbul , Begüm Demir

Low dose computed tomography (LDCT) is desirable for both diagnostic imaging and image guided interventions. Denoisers are openly used to improve the quality of LDCT. Deep learning (DL)-based denoisers have shown state-of-the-art…

Image and Video Processing · Electrical Eng. & Systems 2020-12-08 Ti Bai , Biling Wang , Dan Nguyen , Bao Wang , Bin Dong , Wenxiang Cong , Mannudeep K. Kalra , Steve Jiang

Training large-scale image captioning (IC) models demands access to a rich and diverse set of training examples, gathered from the wild, often from noisy alt-text data. However, recent modeling approaches to IC often fall short in terms of…

Computation and Language · Computer Science 2022-11-01 Khyathi Raghavi Chandu , Piyush Sharma , Soravit Changpinyo , Ashish Thapliyal , Radu Soricut

Generative recommendation treats next-item prediction as autoregressive item-identifier generation. Specifically, items are encoded as semantic identifiers (SIDs), which are short coarse-to-fine token sequences whose early tokens capture…

Artificial Intelligence · Computer Science 2026-05-19 Zaiyi Zheng , Guanghui Min , Yaochen Zhu , Liang Wu , Liangjie Hong , Chen Chen , Jundong Li

Long-tail class incremental learning (LT CIL) remains highly challenging because the scarcity of samples in tail classes not only hampers their learning but also exacerbates catastrophic forgetting under continuously evolving and imbalanced…

Artificial Intelligence · Computer Science 2026-03-24 Xi Wang , Xu Yang , Donghao Sun , Cheng Deng

Though Self-supervised learning (SSL) has been widely studied as a promising technique for representation learning, it doesn't generalize well on long-tailed datasets due to the majority classes dominating the feature space. Recent work…

Computer Vision and Pattern Recognition · Computer Science 2023-07-13 Jianhong Bai , Zuozhu Liu , Hualiang Wang , Jin Hao , Yang Feng , Huanpeng Chu , Haoji Hu

Real-world data usually present long-tailed distributions. Training on imbalanced data tends to render neural networks perform well on head classes while much worse on tail classes. The severe sparseness of training instances for the tail…

Machine Learning · Computer Science 2021-11-10 Chaozheng Wang , Shuzheng Gao , Cuiyun Gao , Pengyun Wang , Wenjie Pei , Lujia Pan , Zenglin Xu

Data in real-world object detection often exhibits the long-tailed distribution. Existing solutions tackle this problem by mitigating the competition between the head and tail categories. However, due to the scarcity of training samples,…

Computer Vision and Pattern Recognition · Computer Science 2022-10-12 Bo Li , Yongqiang Yao , Jingru Tan , Xin Lu , Fengwei Yu , Ye Luo , Jianwei Lu