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Modeling ultra-long user behavior sequences is pivotal for capturing evolving and lifelong interests in modern recommendation systems. However, deploying such models in real-time industrial environments faces a strict "Latency Wall",…

Information Retrieval · Computer Science 2026-02-13 Tianhe Lin , Ziwei Xiong , Baoyuan Ou , Yingjie Qin , Lai Xu , Xiaocheng Zhong , Yao Hu , Zhiyong Wang , Tao Zhou , Yubin Xu , Di Wu

Coherently forecasting the behaviour of a target variable across both coarse and fine temporal scales is crucial for profit-optimized decision-making in several business applications, and remains an open research problem in temporal…

Machine Learning · Computer Science 2025-06-25 Alessandro Salatiello , Stefan Birr , Manuel Kunz

Sequential recommendation is a task to capture hidden user preferences from historical user item interaction data and recommend next items for the user. Significant progress has been made in this domain by leveraging classification based…

Information Retrieval · Computer Science 2024-08-30 Panfeng Cao , Pietro Lio

Hierarchical clustering over graphs is a fundamental task in data mining and machine learning with applications in domains such as phylogenetics, social network analysis, and information retrieval. Specifically, we consider the recently…

Data Structures and Algorithms · Computer Science 2022-06-16 Arpit Agarwal , Sanjeev Khanna , Huan Li , Prathamesh Patil

We add a set of convex constraints to the lasso to produce sparse interaction models that honor the hierarchy restriction that an interaction only be included in a model if one or both variables are marginally important. We give a precise…

Methodology · Statistics 2013-06-20 Jacob Bien , Jonathan Taylor , Robert Tibshirani

Modeling high-order feature interactions efficiently is a central challenge in click-through rate and conversion rate prediction. Modern industrial recommender systems are predominantly built upon deep learning recommendation models, where…

Information Retrieval · Computer Science 2026-02-13 Heng Yu , Xiangjun Zhou , Jie Xia , Heng Zhao , Anxin Wu , Yu Zhao , Dongying Kong

While the self-attention mechanism has been widely used in a wide variety of tasks, it has the unfortunate property of a quadratic cost with respect to the input length, which makes it difficult to deal with long inputs. In this paper, we…

Computation and Language · Computer Science 2020-09-30 Xiaoya Li , Yuxian Meng , Mingxin Zhou , Qinghong Han , Fei Wu , Jiwei Li

Inspired by advances in LLMs, reasoning-enhanced sequential recommendation performs multi-step deliberation before making final predictions, unlocking greater potential for capturing user preferences. However, current methods are…

Information Retrieval · Computer Science 2025-12-17 Yifan Shao , Peilin Zhou , Shoujin Wang , Weizhi Zhang , Xu Cai , Sunghun Kim

Traditional sequence-to-sequence (seq2seq) models and other variations of the attention-mechanism such as hierarchical attention have been applied to the text summarization problem. Though there is a hierarchy in the way humans use language…

Machine Learning · Computer Science 2019-11-04 Rajeev Bhatt Ambati , Saptarashmi Bandyopadhyay , Prasenjit Mitra

Hilbert-Schmidt Independence Criterion (HSIC) has recently been used in the field of single-index models to estimate the directions. Compared with some other well-established methods, it requires relatively weaker conditions. However, its…

Methodology · Statistics 2021-05-19 Runxiong Wu , Chang Deng , Xin Chen

Wearable sensor based human activity recognition is a challenging problem due to difficulty in modeling spatial and temporal dependencies of sensor signals. Recognition models in closed-set assumption are forced to yield members of known…

Computer Vision and Pattern Recognition · Computer Science 2024-04-24 M Tanjid Hasan Tonmoy , Saif Mahmud , A K M Mahbubur Rahman , M Ashraful Amin , Amin Ahsan Ali

Document-level Sentiment Analysis (DSA) is more challenging due to vague semantic links and complicate sentiment information. Recent works have been devoted to leveraging text summarization and have achieved promising results. However,…

Computation and Language · Computer Science 2022-09-08 Lingwei Wei , Dou Hu , Wei Zhou , Xuehai Tang , Xiaodan Zhang , Xin Wang , Jizhong Han , Songlin Hu

Robotic imitation learning faces a fundamental trade-off between modeling long-horizon dependencies and enabling fine-grained closed-loop control. Existing fixed-frequency action chunking approaches struggle to achieve both. Building on…

Robotics · Computer Science 2026-04-08 Jiyao Zhang , Zimu Han , Junhan Wang , Xionghao Wu , Shihong Lin , Jinzhou Li , Hongwei Fan , Ruihai Wu , Dongjiang Li , Hao Dong

Whisper is a multitask and multilingual speech model covering 99 languages. It yields commendable automatic speech recognition (ASR) results in a subset of its covered languages, but the model still underperforms on a non-negligible number…

Computation and Language · Computer Science 2024-05-03 Thomas Palmeira Ferraz

The Segment Anything Model (SAM) has advanced interactive segmentation but is limited by the high computational cost on high-resolution images. This requires downsampling to meet GPU constraints, sacrificing the fine-grained details needed…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 You Huang , Wenbin Lai , Jiayi Ji , Liujuan Cao , Shengchuan Zhang , Rongrong Ji

Compressing self-supervised models has become increasingly necessary, as self-supervised models become larger. While previous approaches have primarily focused on compressing the model size, shortening sequences is also effective in…

Computation and Language · Computer Science 2022-10-26 Yen Meng , Hsuan-Jui Chen , Jiatong Shi , Shinji Watanabe , Paola Garcia , Hung-yi Lee , Hao Tang

Large language model (LLM)-enhanced sequential recommendation typically aims to improve two core components: user semantic embedding extraction and utilization. Despite promising results, existing methods still have two limitations: 1) In…

Information Retrieval · Computer Science 2026-05-13 Guorui Li , Dugang Liu , Lei Li , Xing Tang , Zhong Ming

Modern large-scale recommendation systems rely heavily on user interaction history sequences to enhance the model performance. The advent of large language models and sequential modeling techniques, particularly transformer-like…

Information Retrieval · Computer Science 2026-03-27 Zhimin Chen , Chenyu Zhao , Ka Chun Mo , Yunjiang Jiang , Jane H. Lee , Khushhall Chandra Mahajan , Ning Jiang , Kai Ren , Jinhui Li , Wen-Yun Yang

With the help of powerful generative models, Semantic Image Compression (SIC) has achieved impressive performance at ultra-low bitrate. However, due to coarse-grained visual-semantic alignment and inherent randomness, the reliability of SIC…

Image and Video Processing · Electrical Eng. & Systems 2025-06-03 Chenhao Wu , Qingbo Wu , Haoran Wei , Shuai Chen , Mingzhou He , King Ngi Ngan , Fanman Meng , Hongliang Li

This work introduces Hybrid Sparse Attention (HySparse), a new architecture that interleaves each full attention layer with several sparse attention layers. While conceptually simple, HySparse strategically derives each sparse layer's token…

Computation and Language · Computer Science 2026-02-04 Yizhao Gao , Jianyu Wei , Qihao Zhang , Yu Cheng , Shimao Chen , Zhengju Tang , Zihan Jiang , Yifan Song , Hailin Zhang , Liang Zhao , Bo Yang , Gang Wang , Shijie Cao , Fuli Luo
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