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Machine unlearning aims to remove information derived from forgotten data while preserving that of the remaining dataset in a well-trained model. With the increasing emphasis on data privacy, several approaches to machine unlearning have…

Machine Learning · Computer Science 2024-05-08 Shaofei Shen , Chenhao Zhang , Yawen Zhao , Alina Bialkowski , Weitong Tony Chen , Miao Xu

Missing values, widely called as \textit{sparsity} in literature, is a common characteristic of many real-world datasets. Many imputation methods have been proposed to address this problem of data incompleteness or sparsity. However, the…

Machine Learning · Computer Science 2022-07-28 Vishwas Choudhary , Binay Gupta , Anirban Chatterjee , Subhadip Paul , Kunal Banerjee , Vijay Agneeswaran

Anomaly detection is being regarded as an unsupervised learning task as anomalies stem from adversarial or unlikely events with unknown distributions. However, the predictive performance of purely unsupervised anomaly detection often fails…

Machine Learning · Computer Science 2014-01-27 Nico Goernitz , Marius Micha Kloft , Konrad Rieck , Ulf Brefeld

Unlabeled streaming data are usually collected to describe dynamic systems, where concept drift detection is a vital prerequisite to understanding the evolution of systems. However, the drifting concepts are usually imbalanced in most real…

Machine Learning · Computer Science 2026-03-10 Yiqun Zhang , Zhanpei Huang , Mingjie Zhao , Chuyao Zhang , Yang Lu , Yuzhu Ji , Fangqing Gu , An Zeng

With today's abundant streams of data, the only constant we can rely on is change. For stream classification algorithms, it is necessary to adapt to concept drift. This can be achieved by monitoring the model error, and triggering counter…

Machine Learning · Computer Science 2020-12-09 Lukas Fleckenstein , Sebastian Kauschke , Johannes Fürnkranz

Existing drift detection methods focus on designing sensitive test statistics. They treat the detection threshold as a fixed hyperparameter, set once to balance false alarms and late detections, and applied uniformly across all datasets and…

Machine Learning · Computer Science 2025-11-14 Pengqian Lu , Jie Lu , Anjin Liu , En Yu , Guangquan Zhang

A fundamental issue for statistical classification models in a streaming environment is that the joint distribution between predictor and response variables changes over time (a phenomenon also known as concept drifts), such that their…

Machine Learning · Statistics 2019-02-11 Shujian Yu , Zubin Abraham , Heng Wang , Mohak Shah , Yantao Wei , José C. Príncipe

Training models continually to detect and classify objects, from new classes and new domains, remains an open problem. In this work, we conduct a thorough analysis of why and how object detection models forget catastrophically. We focus on…

Computer Vision and Pattern Recognition · Computer Science 2022-10-10 Eli Verwimp , Kuo Yang , Sarah Parisot , Hong Lanqing , Steven McDonagh , Eduardo Pérez-Pellitero , Matthias De Lange , Tinne Tuytelaars

A machine learning method needs to adapt to over time changes in the environment. Such changes are known as concept drift. In this paper, we propose concept drift tackling method as an enhancement of Online Sequential Extreme Learning…

Artificial Intelligence · Computer Science 2016-10-10 Arif Budiman , Mohamad Ivan Fanany , Chan Basaruddin

Event detection has long been the domain of physical sensors operating in a static dataset assumption. The prevalence of social media and web access has led to the emergence of social, or human sensors who report on events globally. This…

Social and Information Networks · Computer Science 2019-11-14 Abhijit Suprem , Aibek Musaev , Calton Pu

We propose Enhash, a fast ensemble learner that detects \textit{concept drift} in a data stream. A stream may consist of abrupt, gradual, virtual, or recurring events, or a mixture of various types of drift. Enhash employs projection hash…

Machine Learning · Computer Science 2020-11-10 Aashi Jindal , Prashant Gupta , Debarka Sengupta , Jayadeva

The proliferation of diffusion models trained on web-scale, provenance-uncertain image collections has made it essential, yet technically unresolved, to determine whether a model has learned from specific copyrighted data without…

Machine Learning · Computer Science 2026-04-06 Muxing Li , Zesheng Ye , Sharon Li , Andy Song , Guangquan Zhang , Feng Liu

With the recent development of Semi-Supervised Object Detection (SS-OD) techniques, object detectors can be improved by using a limited amount of labeled data and abundant unlabeled data. However, there are still two challenges that are not…

Computer Vision and Pattern Recognition · Computer Science 2022-06-22 Yen-Cheng Liu , Chih-Yao Ma , Zsolt Kira

In today's connected world, the generation of massive streaming data across diverse domains has become commonplace. In the presence of concept drift, class imbalance, label scarcity, and new class emergence, they jointly degrade…

Machine Learning · Computer Science 2026-02-11 Jin Li , Kleanthis Malialis , Marios Polycarpou

We introduce a novel approach for detecting distribution shifts that negatively impact the performance of machine learning models in continuous production environments, which requires no access to ground truth data labels. It builds upon…

Machine Learning · Statistics 2024-12-18 Salim I. Amoukou , Tom Bewley , Saumitra Mishra , Freddy Lecue , Daniele Magazzeni , Manuela Veloso

Predictive models often degrade in performance due to evolving data distributions, a phenomenon known as data drift. Among its forms, concept drift, where the relationship between explanatory variables and the response variable changes, is…

Machine Learning · Statistics 2026-05-18 Ugur Dar , Mustafa Cavus

Unsupervised learning from visual data is one of the most difficult challenges in computer vision, being a fundamental task for understanding how visual recognition works. From a practical point of view, learning from unsupervised visual…

Computer Vision and Pattern Recognition · Computer Science 2017-04-03 Ioana Croitoru , Simion-Vlad Bogolin , Marius Leordeanu

Distantly-Supervised Named Entity Recognition (DS-NER) is widely used in real-world scenarios. It can effectively alleviate the burden of annotation by matching entities in existing knowledge bases with snippets in the text but suffer from…

Computation and Language · Computer Science 2025-07-04 Shuzheng Si , Helan Hu , Haozhe Zhao , Shuang Zeng , Kaikai An , Zefan Cai , Baobao Chang

Recent research has shown that language models have a tendency to memorize rare or unique sequences in the training corpora which can thus leak sensitive attributes of user data. We employ a teacher-student framework and propose a novel…

Computation and Language · Computer Science 2022-10-14 Zhe Liu , Xuedong Zhang , Fuchun Peng

In the context of label-efficient learning on video data, the distillation method and the structural design of the teacher-student architecture have a significant impact on knowledge distillation. However, the relationship between these…

Computer Vision and Pattern Recognition · Computer Science 2023-07-18 Chao Wang , Zheng Tang