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Imbalanced learning (IL), i.e., learning unbiased models from class-imbalanced data, is a challenging problem. Typical IL methods including resampling and reweighting were designed based on some heuristic assumptions. They often suffer from…

机器学习 · 计算机科学 2020-10-20 Zhining Liu , Pengfei Wei , Jing Jiang , Wei Cao , Jiang Bian , Yi Chang

In-context learning (ICL) using large language models for tasks with many labels is challenging due to the limited context window, which makes it difficult to fit a sufficient number of examples in the prompt. In this paper, we use a…

计算与语言 · 计算机科学 2023-12-07 Aristides Milios , Siva Reddy , Dzmitry Bahdanau

Model-free deep reinforcement learning (RL) has demonstrated its superiority on many complex sequential decision-making problems. However, heavy dependence on dense rewards and high sample-complexity impedes the wide adoption of these…

机器学习 · 计算机科学 2020-04-02 Zhuangdi Zhu , Kaixiang Lin , Bo Dai , Jiayu Zhou

In-context learning (ICL) leverages in-context examples as prompts for the predictions of Large Language Models (LLMs). These prompts play a crucial role in achieving strong performance. However, the selection of suitable prompts from a…

机器学习 · 计算机科学 2024-09-16 Jian Qian , Miao Sun , Sifan Zhou , Ziyu Zhao , Ruizhi Hun , Patrick Chiang

In-context learning (ICL) is a few-shot learning paradigm that involves learning mappings through input-output pairs and appropriately applying them to new instances. Despite the remarkable ICL capabilities demonstrated by Large Language…

计算与语言 · 计算机科学 2024-08-06 Peng Wang , Xiaobin Wang , Chao Lou , Shengyu Mao , Pengjun Xie , Yong Jiang

As a fundamental and extensively studied task in computer vision, image segmentation aims to locate and identify different semantic concepts at the pixel level. Recently, inspired by In-Context Learning (ICL), several generalist…

计算机视觉与模式识别 · 计算机科学 2024-07-16 Wei Suo , Lanqing Lai , Mengyang Sun , Hanwang Zhang , Peng Wang , Yanning Zhang

Recent developments in large pre-trained language models have enabled unprecedented performance on a variety of downstream tasks. Achieving best performance with these models often leverages in-context learning, where a model performs a…

计算与语言 · 计算机科学 2024-04-17 Alexander Scarlatos , Andrew Lan

Building models of natural language processing (NLP) is challenging in low-resource scenarios where only limited data are available. Optimization-based meta-learning algorithms achieve promising results in low-resource scenarios by adapting…

计算与语言 · 计算机科学 2022-07-15 Yingxiu Zhao , Zhiliang Tian , Huaxiu Yao , Yinhe Zheng , Dongkyu Lee , Yiping Song , Jian Sun , Nevin L. Zhang

Effective organization of in-context learning (ICL) demonstrations is key to improving the quality of large language model (LLM) responses. To create better sample-label pairs that instruct LLM understanding, we introduce logit…

计算与语言 · 计算机科学 2024-10-16 Zhu Zixiao , Feng Zijian , Zhou Hanzhang , Qian Junlang , Mao Kezhi

Within few-shot learning, in-context learning (ICL) has become a potential method for leveraging contextual information to improve model performance on small amounts of data or in resource-constrained environments where training models on…

计算与语言 · 计算机科学 2024-06-27 Areeg Fahad Rasheed , M. Zarkoosh

In-Context Learning (ICL) has become a powerful paradigm that enables LLMs to perform a wide range of tasks without task-specific fine-tuning. However, the effectiveness of ICL heavily depends on the quality of exemplar selection. In…

计算与语言 · 计算机科学 2025-08-29 Jiaqian Li , Qisheng Hu , Jing Li , Wenya Wang

In-context learning (ICL) enables large language models to perform few-shot learning by conditioning on labeled examples in the prompt. Despite its flexibility, ICL suffers from instability -- especially as prompt length increases with more…

计算与语言 · 计算机科学 2025-10-27 Josip Jukić , Jan Šnajder

The deployment of large-scale models, such as large language models (LLMs) and sophisticated image generation systems, incurs substantial costs due to their computational demands. To mitigate these costs and address challenges related to…

Click-Through Rate (CTR) prediction holds a paramount position in recommender systems. The prevailing ID-based paradigm underperforms in cold-start scenarios due to the skewed distribution of feature frequency. Additionally, the utilization…

In-context learning (ICL) enables large language models to perform new tasks by conditioning on a sequence of examples. Most prior work reasonably and intuitively assumes that which examples are chosen has a far greater effect on…

计算与语言 · 计算机科学 2025-11-14 Warren Li , Yiqian Wang , Zihan Wang , Jingbo Shang

A core capability of intelligent systems is the ability to quickly learn new tasks by drawing on prior experience. Gradient (or optimization) based meta-learning has recently emerged as an effective approach for few-shot learning. In this…

机器学习 · 计算机科学 2019-09-11 Aravind Rajeswaran , Chelsea Finn , Sham Kakade , Sergey Levine

In-context learning (ICL) enables efficient few-shot learning in large language models (LLMs) without training, but suffers from the quadratic input complexity of transformers, limiting the maximum number of exemplars. While various…

计算与语言 · 计算机科学 2025-10-10 Shaoyi Zheng , Canyu Zhang , Tianyi Zhou , Shengjie Wang

Answering reasoning-based complex questions over text and hybrid sources, including tables, is a challenging task. Recent advances in large language models (LLMs) have enabled in-context learning (ICL), allowing LLMs to acquire proficiency…

Estimating the selectivity of a query is a key step in almost any cost-based query optimizer. Most of today's databases rely on histograms or samples that are periodically refreshed by re-scanning the data as the underlying data changes.…

数据库 · 计算机科学 2020-04-14 Yongjoo Park , Shucheng Zhong , Barzan Mozafari

We study task selection to enhance sample efficiency in model-agnostic meta-reinforcement learning (MAML-RL). Traditional meta-RL typically assumes that all available tasks are equally important, which can lead to task redundancy when they…

最优化与控制 · 数学 2025-04-15 Donglin Zhan , Leonardo F. Toso , James Anderson