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Listwise reranking utilizing Large Language Models (LLMs) has achieved state-of-the-art retrieval effectiveness. Recently, reasoning-enhanced models have further pushed these boundaries by employing Chain-of-Thought (CoT) to perform deep…

信息检索 · 计算机科学 2026-05-15 Danyang Liu , Kan Li

This paper is concerned with the problem of low rank plus sparse matrix decomposition for big data. Conventional algorithms for matrix decomposition use the entire data to extract the low-rank and sparse components, and are based on…

数值分析 · 计算机科学 2017-03-17 Mostafa Rahmani , George Atia

Machine learning classifiers often produce probabilistic predictions that are critical for accurate and interpretable decision-making in various domains. The quality of these predictions is generally evaluated with proper losses, such as…

机器学习 · 计算机科学 2025-06-26 Eugène Berta , David Holzmüller , Michael I. Jordan , Francis Bach

LLM-based listwise passage reranking has attracted attention for its effectiveness in ranking candidate passages. However, these models suffer from positional bias, where passages positioned towards the end of the input are less likely to…

信息检索 · 计算机科学 2026-04-07 Jingfen Qiao , Jin Huang , Xinyu Ma , Shuaiqiang Wang , Dawei Yin , Evangelos Kanoulas , Andrew Yates

The remarkable success of pretrain-then-finetune paradigm has led to a proliferation of available pre-trained models for vision tasks. This surge presents a significant challenge in efficiently choosing the most suitable pre-trained models…

计算机视觉与模式识别 · 计算机科学 2025-07-22 Zixuan Hu , Xiaotong Li , Shixiang Tang , Jun Liu , Yichun Hu , Ling-Yu Duan

In conventional deep learning, the number of neurons typically remains fixed during training. However, insights from biology suggest that the human hippocampus undergoes continuous neuron generation and pruning of neurons over the course of…

机器学习 · 计算机科学 2025-07-15 Taigo Sakai , Kazuhiro Hotta

Supervised machine learning models and their evaluation strongly depends on the quality of the underlying dataset. When we search for a relevant piece of information it may appear anywhere in a given passage. However, we observe a bias in…

信息检索 · 计算机科学 2021-01-19 Sebastian Hofstätter , Aldo Lipani , Sophia Althammer , Markus Zlabinger , Allan Hanbury

A discriminatively trained neural net classifier can fit the training data perfectly if all information about its input other than class membership has been discarded prior to the output layer. Surprisingly, past research has discovered…

机器学习 · 计算机科学 2021-07-23 Piotr Teterwak , Chiyuan Zhang , Dilip Krishnan , Michael C. Mozer

Long-tailed semi-supervised learning (LTSSL) presents a formidable challenge where models must overcome the scarcity of tail samples while mitigating the noise from unreliable pseudo-labels. Most prior LTSSL methods are designed to train…

机器学习 · 计算机科学 2026-04-09 Zhiyuan Huang , Jiahao Chen , Bing Su

Deep neural networks frequently suffer from performance degradation when the training data is long-tailed because several majority classes dominate the training, resulting in a biased model. Recent studies have made a great effort in…

计算机视觉与模式识别 · 计算机科学 2023-05-19 Mengke Li , Yiu-ming Cheung , Juyong Jiang

This paper addresses the problem of selective classification for deep neural networks, where a model is allowed to abstain from low-confidence predictions to avoid potential errors. We focus on so-called post-hoc methods, which replace the…

机器学习 · 计算机科学 2025-06-23 Luís Felipe P. Cattelan , Danilo Silva

Category-level 6D object pose estimation is typically formulated as a multi-category joint learning problem with fully shared model parameters. However, pronounced geometric heterogeneity across categories entangles incompatible…

计算机视觉与模式识别 · 计算机科学 2026-05-18 Yifan Gao , Lu Zou , Zhangjin Huang , Guoping Wang

Label ranking is a prediction task which deals with learning a mapping between an instance and a ranking (i.e., order) of labels from a finite set, representing their relevance to the instance. Boosting is a well-known and reliable ensemble…

机器学习 · 计算机科学 2020-09-24 Lihi Dery , Erez Shmueli

Long-tailed recognition is ubiquitous and challenging in deep learning and even in the downstream finetuning of foundation models, since the skew class distribution generally prevents the model generalization to the tail classes. Despite…

机器学习 · 计算机科学 2025-10-10 Jiaan Luo , Feng Hong , Qiang Hu , Xiaofeng Cao , Feng Liu , Jiangchao Yao

Real-world data often follow a long-tailed distribution as the frequency of each class is typically different. For example, a dataset can have a large number of under-represented classes and a few classes with more than sufficient data.…

计算机视觉与模式识别 · 计算机科学 2020-08-11 Peng Chu , Xiao Bian , Shaopeng Liu , Haibin Ling

Online continual learning is a challenging problem where models must learn from a non-stationary data stream while avoiding catastrophic forgetting. Inter-class imbalance during training has been identified as a major cause of forgetting,…

机器学习 · 计算机科学 2024-10-01 Zhehao Huang , Tao Li , Chenhe Yuan , Yingwen Wu , Xiaolin Huang

Class imbalance, which is also called long-tailed distribution, is a common problem in classification tasks based on machine learning. If it happens, the minority data will be overwhelmed by the majority, which presents quite a challenge…

机器学习 · 计算机科学 2023-03-29 Jia-Chen Zhao

Pixel wise image labeling is an interesting and challenging problem with great significance in the computer vision community. In order for a dense labeling algorithm to be able to achieve accurate and precise results, it has to consider the…

计算机视觉与模式识别 · 计算机科学 2016-12-15 Spyros Gidaris , Nikos Komodakis

Low rank approximation is a commonly occurring problem in many computer vision and machine learning applications. There are two common ways of optimizing the resulting models. Either the set of matrices with a given rank can be explicitly…

计算机视觉与模式识别 · 计算机科学 2019-07-24 Marcus Valtonen Örnhag , Carl Olsson , Anders Heyden

Training data for class-conditional image synthesis often exhibit a long-tailed distribution with limited images for tail classes. Such an imbalance causes mode collapse and reduces the diversity of synthesized images for tail classes. For…

计算机视觉与模式识别 · 计算机科学 2025-10-28 Fang Chen , Alex Villa , Gongbo Liang , Xiaoyi Lu , Meng Tang