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Large language models (LLMs) have demonstrated exceptional performance across a wide range of tasks and domains, with data preparation playing a critical role in achieving these results. Pre-training data typically combines information from…

计算与语言 · 计算机科学 2024-09-27 Hao Liang , Keshi Zhao , Yajie Yang , Bin Cui , Guosheng Dong , Zenan Zhou , Wentao Zhang

The goal of feature selection is to choose the optimal subset of features for a recognition task by evaluating the importance of each feature, thereby achieving effective dimensionality reduction. Currently, proposed feature selection…

机器学习 · 计算机科学 2024-02-27 Zhenxing Zhang , Jun Ge , Zheng Wei , Chunjie Zhou , Yilei Wang

Instruction-tuned language models increasingly rely on large multi-turn dialogue corpora, but these datasets are often noisy and structurally inconsistent, with topic drift, repetitive chitchat, and mismatched answer formats across turns.…

计算与语言 · 计算机科学 2026-04-21 Bo Li , Shikun Zhang , Wei Ye

Open set recognition (OSR) is a critical aspect of machine learning, addressing the challenge of detecting novel classes during inference. Within the realm of deep learning, neural classifiers trained on a closed set of data typically…

计算机视觉与模式识别 · 计算机科学 2026-05-05 Jiawen Xu , Margret Keuper

Machine learning has been proven to be effective in various application areas, such as object and speech recognition on mobile systems. Since a critical key to machine learning success is the availability of large training data, many…

机器学习 · 计算机科学 2021-01-06 Hyeongmin Cho , Sangkyun Lee

Meta-learning methods typically learn tasks under the assumption that all tasks are equally important. However, this assumption is often not valid. In real-world applications, tasks can vary both in their importance during different…

机器学习 · 计算机科学 2024-05-14 Donglin Zhan , James Anderson

While large-scale training data is fundamental for developing capable large language models (LLMs), strategically selecting high-quality data has emerged as a critical approach to enhance training efficiency and reduce computational costs.…

机器学习 · 计算机科学 2025-07-23 Yang Yu , Kai Han , Hang Zhou , Yehui Tang , Kaiqi Huang , Yunhe Wang , Dacheng Tao

The remarkable success of contrastive-learning-based multimodal models has been greatly driven by training on ever-larger datasets with expensive compute consumption. Sample selection as an alternative efficient paradigm plays an important…

计算机视觉与模式识别 · 计算机科学 2025-07-18 Zihua Zhao , Feng Hong , Mengxi Chen , Pengyi Chen , Benyuan Liu , Jiangchao Yao , Ya Zhang , Yanfeng Wang

As machine learning becomes increasingly prevalent in impactful decisions, recognizing when inference data is outside the model's expected input distribution is paramount for giving context to predictions. Out-of-distribution (OOD)…

机器学习 · 计算机科学 2024-01-19 Anish Lakkapragada , Amol Khanna , Edward Raff , Nathan Inkawhich

Machine learning approaches often require training and evaluation datasets with a clear separation between positive and negative examples. This risks simplifying and even obscuring the inherent subjectivity present in many tasks. Preserving…

Data is one of the most critical elements in building a large language model. However, existing systems either fail to customize a corpus curation pipeline or neglect to leverage comprehensive corpus assessment for iterative optimization of…

计算与语言 · 计算机科学 2023-11-22 Tong Zhou , Yubo Chen , Pengfei Cao , Kang Liu , Jun Zhao , Shengping Liu

State-of-the-art vision pretraining methods rely on image-level self-distillation from object-centric datasets such as ImageNet, implicitly assuming each image contains a single object. This assumption does not always hold: many ImageNet…

计算机视觉与模式识别 · 计算机科学 2025-06-09 Çağlar Hızlı , Çağatay Yıldız , Pekka Marttinen

In the real world, a learning system could receive an input that is unlike anything it has seen during training. Unfortunately, out-of-distribution samples can lead to unpredictable behaviour. We need to know whether any given input belongs…

机器学习 · 计算机科学 2019-08-21 Alireza Shafaei , Mark Schmidt , James J. Little

Due to the recent cases of algorithmic bias in data-driven decision-making, machine learning methods are being put under the microscope in order to understand the root cause of these biases and how to correct them. Here, we consider a basic…

机器学习 · 计算机科学 2016-10-25 L. Elisa Celis , Amit Deshpande , Tarun Kathuria , Nisheeth K. Vishnoi

Bias in training datasets must be managed for various groups in classification tasks to ensure parity or equal treatment. With the recent growth in artificial intelligence models and their expanding role in automated decision-making,…

We introduce a new method of performing high dimensional discriminant analysis, which we call multiDA. We achieve this by constructing a hybrid model that seamlessly integrates a multiclass diagonal discriminant analysis model and feature…

机器学习 · 统计学 2018-07-05 Sarah Elizabeth Romanes , John Thomas Ormerod , Jean YH Yang

Comparing datasets is a fundamental task in machine learning, essential for various learning paradigms-from evaluating train and test datasets for model generalization to using dataset similarity for detecting data drift. While traditional…

机器学习 · 计算机科学 2025-06-18 Paula Rodriguez-Diaz , Lingkai Kong , Kai Wang , David Alvarez-Melis , Milind Tambe

We present a novel, domain-agnostic, model-independent, unsupervised, and universally applicable Machine Learning approach for dimensionality reduction based on the principles of algorithmic complexity. Specifically, but without loss of…

Deep learning models often require large amounts of data for training, leading to increased costs. It is particularly challenging in medical imaging, i.e., gathering distributed data for centralized training, and meanwhile, obtaining…

计算机视觉与模式识别 · 计算机科学 2023-06-27 Zhenyu Tang , Shaoting Zhang , Xiaosong Wang

Improving the retrieval relevance on noisy datasets is an emerging need for the curation of a large-scale clean dataset in the medical domain. While existing methods can be applied for class-wise retrieval (aka. inter-class), they cannot…

计算机视觉与模式识别 · 计算机科学 2022-04-08 Xiaoyuan Guo , Jiali Duan , Saptarshi Purkayastha , Hari Trivedi , Judy Wawira Gichoya , Imon Banerjee