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Retrieval-augmented generation (RAG) systems rely on retrieval models for identifying relevant contexts and answer generation models for utilizing those contexts. However, retrievers exhibit imperfect recall and precision, limiting…

计算与语言 · 计算机科学 2026-04-29 Jerry Huang , Siddarth Madala , Risham Sidhu , Cheng Niu , Hao Peng , Julia Hockenmaier , Tong Zhang

Retrosynthesis, of which the goal is to find a set of reactants for synthesizing a target product, is an emerging research area of deep learning. While the existing approaches have shown promising results, they currently lack the ability to…

机器学习 · 计算机科学 2021-06-04 Hankook Lee , Sungsoo Ahn , Seung-Woo Seo , You Young Song , Eunho Yang , Sung-Ju Hwang , Jinwoo Shin

Class-imbalanced data, in which some classes contain far more samples than others, is ubiquitous in real-world applications. Standard techniques for handling class-imbalance usually work by training on a re-weighted loss or on re-balanced…

人工智能 · 计算机科学 2021-06-18 Arpit Bansal , Micah Goldblum , Valeriia Cherepanova , Avi Schwarzschild , C. Bayan Bruss , Tom Goldstein

The International Classification of Diseases (ICD) serves as a definitive medical classification system encompassing a wide range of diseases and conditions. The primary objective of ICD indexing is to allocate a subset of ICD codes to a…

计算与语言 · 计算机科学 2024-05-30 Xindi Wang , Robert E. Mercer , Frank Rudzicz

In this work, we develop a novel data-driven model predictive controller using advanced techniques in the field of machine learning. The objective is to regulate control signals to adjust the desired internal room setpoint temperature,…

系统与控制 · 电气工程与系统科学 2021-01-20 Clement Etienam , Siying Shen , Edward J O'Dwyer , Joshua Sykes

Large language models (LLMs) have revolutionized natural language processing, yet hallucinations in knowledge-intensive tasks remain a critical challenge. Retrieval-augmented generation (RAG) addresses this by integrating external…

计算与语言 · 计算机科学 2026-02-17 Zhipeng Song , Xiangyu Kong , Xinrui Bao , Yizhi Zhou , Jiulong Jiao , Sitong Liu , Yuhang Zhou , Heng Qi

Background: The trend towards large-scale studies including population imaging poses new challenges in terms of quality control (QC). This is a particular issue when automatic processing tools, e.g. image segmentation methods, are employed…

The accurate automated classification of variable stars into their respective sub-types is difficult. Machine learning based solutions often fall foul of the imbalanced learning problem, which causes poor generalisation performance in…

天体物理仪器与方法 · 物理学 2020-03-18 Zafiirah Hosenie , Robert Lyon , Benjamin Stappers , Arrykrishna Mootoovaloo , Vanessa McBride

Anomaly detection underpins critical applications from network security and intrusion detection to fraud prevention, where recognizing aberrant patterns rapidly is indispensable. Progress in this area is routinely impeded by two obstacles:…

机器学习 · 计算机科学 2025-09-09 Jiaju Miao , Wei Zhu

Learning from imbalanced data is a challenging task. Standard classification algorithms tend to perform poorly when trained on imbalanced data. Some special strategies need to be adopted, either by modifying the data distribution or by…

机器学习 · 计算机科学 2022-08-26 Asif Newaz , Shahriar Hassan , Farhan Shahriyar Haq

Unsupervised recalibration (URC) is a general way to improve the accuracy of an already trained probabilistic classification or regression model upon encountering new data while deployed in the field. URC does not require any ground truth…

机器学习 · 统计学 2020-10-20 Albert Ziegler , Paweł Czyż

Class imbalance poses new challenges when it comes to classifying data streams. Many algorithms recently proposed in the literature tackle this problem using a variety of data-level, algorithm-level, and ensemble approaches. However, there…

机器学习 · 计算机科学 2023-07-19 Gabriel Aguiar , Bartosz Krawczyk , Alberto Cano

Online class-incremental continual learning (CL) studies the problem of learning new classes continually from an online non-stationary data stream, intending to adapt to new data while mitigating catastrophic forgetting. While memory replay…

机器学习 · 计算机科学 2021-10-06 Zheda Mai , Ruiwen Li , Hyunwoo Kim , Scott Sanner

The recently established RPCA method provides us a convenient way to restore low-rank matrices from grossly corrupted observations. While elegant in theory and powerful in reality, RPCA may be not an ultimate solution to the low-rank matrix…

统计方法学 · 统计学 2014-07-17 Guangcan Liu , Ping Li

In many real-world prediction tasks, class labels include information about the relative ordering between labels, which is not captured by commonly-used loss functions such as multi-category cross-entropy. Recently, the deep learning…

机器学习 · 计算机科学 2020-11-16 Wenzhi Cao , Vahid Mirjalili , Sebastian Raschka

Integrating supervised contrastive loss to cross entropy-based communication has recently been proposed as a solution to address the long-tail learning problem. However, when the class imbalance ratio is high, it requires adjusting the…

机器学习 · 计算机科学 2024-07-10 Charika De Alvis , Dishanika Denipitiyage , Suranga Seneviratne

The limited understanding capacity of the visual encoder in Contrastive Language-Image Pre-training (CLIP) has become a key bottleneck for downstream performance. This capacity includes both Discriminative Ability (D-Ability), which…

计算机视觉与模式识别 · 计算机科学 2026-03-23 Boyu Han , Qianqian Xu , Shilong Bao , Zhiyong Yang , Ruochen Cui , Xilin Zhao , Qingming Huang

Deep regression models typically learn in an end-to-end fashion without explicitly emphasizing a regression-aware representation. Consequently, the learned representations exhibit fragmentation and fail to capture the continuous nature of…

机器学习 · 计算机科学 2023-10-11 Kaiwen Zha , Peng Cao , Jeany Son , Yuzhe Yang , Dina Katabi

Data imbalance, in which a plurality of the data samples come from a small proportion of labels, poses a challenge in training deep neural networks. Unlike classification, in regression the labels are continuous, potentially boundless, and…

机器学习 · 计算机科学 2022-06-27 Yu Gong , Greg Mori , Frederick Tung

Existing methods of 3D cross-modal retrieval heavily lean on category distribution priors within the training set, which diminishes their efficacy when tasked with unseen categories under open-set environments. To tackle this problem, we…

多媒体 · 计算机科学 2024-07-23 Yang Xu , Yifan Feng , Yu Jiang