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Data sparsity is an inherent challenge in the recommender systems, where most of the data is collected from the implicit feedbacks of users. This causes two difficulties in designing effective algorithms: first, the majority of users only…

信息检索 · 计算机科学 2020-07-15 Wenhui Yu , Xiao Lin , Junfeng Ge , Wenwu Ou , Zheng Qin

For a target task where labeled data is unavailable, domain adaptation can transfer a learner from a different source domain. Previous deep domain adaptation methods mainly learn a global domain shift, i.e., align the global source and…

计算机视觉与模式识别 · 计算机科学 2021-06-18 Yongchun Zhu , Fuzhen Zhuang , Jindong Wang , Guolin Ke , Jingwu Chen , Jiang Bian , Hui Xiong , Qing He

This work provides a framework for addressing the problem of supervised domain adaptation with deep models. The main idea is to exploit adversarial learning to learn an embedded subspace that simultaneously maximizes the confusion between…

计算机视觉与模式识别 · 计算机科学 2017-11-08 Saeid Motiian , Quinn Jones , Seyed Mehdi Iranmanesh , Gianfranco Doretto

Human activity recognition (HAR) using wearable sensors has advanced through various machine learning paradigms, each with inherent trade-offs between performance and labeling requirements. While fully supervised techniques achieve high…

机器学习 · 计算机科学 2025-12-24 Taoran Sheng , Manfred Huber

The use of supervised learning for Human Activity Recognition (HAR) on mobile devices leads to strong classification performances. Such an approach, however, requires large amounts of labeled data, both for the initial training of the…

计算机视觉与模式识别 · 计算机科学 2023-06-27 Riccardo Presotto , Sannara Ek , Gabriele Civitarese , François Portet , Philippe Lalanda , Claudio Bettini

Domain Adaptation has been widely used to deal with the distribution shift in vision, language, multimedia etc. Most domain adaptation methods learn domain-invariant features with data from both domains available. However, such a strategy…

计算机视觉与模式识别 · 计算机科学 2021-07-15 Ning Ma , Jiajun Bu , Lixian Lu , Jun Wen , Zhen Zhang , Sheng Zhou , Xifeng Yan

Unsupervised domain translation has recently achieved impressive performance with Generative Adversarial Network (GAN) and sufficient (unpaired) training data. However, existing domain translation frameworks form in a disposable way where…

计算机视觉与模式识别 · 计算机科学 2019-09-11 Jianxin Lin , Yijun Wang , Tianyu He , Zhibo Chen

Deep learning-based diagnostic models often suffer performance drops due to distribution shifts between training (source) and test (target) domains. Collecting and labeling sufficient target domain data for model retraining represents an…

计算机视觉与模式识别 · 计算机科学 2025-07-02 Yaofei Duan , Yuhao Huang , Xin Yang , Luyi Han , Xinyu Xie , Zhiyuan Zhu , Ping He , Ka-Hou Chan , Ligang Cui , Sio-Kei Im , Dong Ni , Tao Tan

Machine learning and deep learning have shown great promise in mobile sensing applications, including Human Activity Recognition. However, the performance of such models in real-world settings largely depends on the availability of large…

机器学习 · 计算机科学 2021-02-12 Chi Ian Tang , Ignacio Perez-Pozuelo , Dimitris Spathis , Soren Brage , Nick Wareham , Cecilia Mascolo

Human activity recognition (HAR) research has increased in recent years due to its applications in mobile health monitoring, activity recognition, and patient rehabilitation. The typical approach is training a HAR classifier offline with…

信号处理 · 电气工程与系统科学 2021-02-24 Sizhe An , Ganapati Bhat , Suat Gumussoy , Umit Ogras

Unsupervised domain adaptation seeks to mitigate the distribution discrepancy between source and target domains, given labeled samples of the source domain and unlabeled samples of the target domain. Generative adversarial networks (GANs)…

计算机视觉与模式识别 · 计算机科学 2021-04-29 Mohammad Mahfujur Rahman , Clinton Fookes , Sridha Sridharan

3D object detectors are fundamental components of perception systems in autonomous vehicles. While these detectors achieve remarkable performance on standard autonomous driving benchmarks, they often struggle to generalize across different…

计算机视觉与模式识别 · 计算机科学 2026-01-01 Bartłomiej Olber , Jakub Winter , Paweł Wawrzyński , Andrii Gamalii , Daniel Górniak , Marcin Łojek , Robert Nowak , Krystian Radlak

Data sparsity and data imbalance are practical and challenging issues in cross-domain recommender systems. This paper addresses those problems by leveraging the concepts which derive from representation learning, adversarial learning and…

信息检索 · 计算机科学 2019-04-11 Cheng Wang , Mathias Niepert , Hui Li

Domain adaptation is widely used in learning problems lacking labels. Recent studies show that deep adversarial domain adaptation models can make markable improvements in performance, which include symmetric and asymmetric architectures.…

计算机视觉与模式识别 · 计算机科学 2019-09-19 Guanyu Cai , Yuqin Wang , Mengchu Zhou , Lianghua He

Deep learning-based human activity recognition (HAR) methods have shown great promise in the applications of smart healthcare systems and wireless body sensor network (BSN). Despite their demonstrated performance in laboratory settings, the…

人机交互 · 计算机科学 2023-03-28 Baichun Wei , Chunzhi Yi , Qi Zhang , Haiqi Zhu , Jianfei Zhu , Feng Jiang

Domain Adaptation aiming to learn a transferable feature between different but related domains has been well investigated and has shown excellent empirical performances. Previous works mainly focused on matching the marginal feature…

机器学习 · 计算机科学 2020-05-26 Fan Zhou , Changjian Shui , Bincheng Huang , Boyu Wang , Brahim Chaib-draa

The accuracy of deep learning (e.g., convolutional neural networks) for an image classification task critically relies on the amount of labeled training data. Aiming to solve an image classification task on a new domain that lacks labeled…

计算机视觉与模式识别 · 计算机科学 2019-01-01 Xianghong Fang , Haoli Bai , Ziyi Guo , Bin Shen , Steven Hoi , Zenglin Xu

Adversarial learning methods are a promising approach to training robust deep networks, and can generate complex samples across diverse domains. They also can improve recognition despite the presence of domain shift or dataset bias: several…

计算机视觉与模式识别 · 计算机科学 2017-02-20 Eric Tzeng , Judy Hoffman , Kate Saenko , Trevor Darrell

Deep reinforcement learning agents have recently been successful across a variety of discrete and continuous control tasks; however, they can be slow to train and require a large number of interactions with the environment to learn a…

机器学习 · 计算机科学 2018-12-19 Thomas Carr , Maria Chli , George Vogiatzis

The success of supervised learning hinges on the assumption that the training and test data come from the same underlying distribution, which is often not valid in practice due to potential distribution shift. In light of this, most…

机器学习 · 计算机科学 2021-04-06 Bo Li , Yezhen Wang , Shanghang Zhang , Dongsheng Li , Trevor Darrell , Kurt Keutzer , Han Zhao