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Approaches based on generative adversarial networks for imitation learning are promising because they are sample efficient in terms of expert demonstrations. However, training a generator requires many interactions with the actual…

机器学习 · 计算机科学 2022-09-01 Eiji Uchibe

Sampling is a fundamental technique, and sampling without replacement is often desirable when duplicate samples are not beneficial. Within machine learning, sampling is useful for generating diverse outputs from a trained model. We present…

机器学习 · 计算机科学 2021-07-21 Kensen Shi , David Bieber , Charles Sutton

Pre-trained Language Models (PLMs) have shown superior performance on various downstream Natural Language Processing (NLP) tasks. However, conventional pre-training objectives do not explicitly model relational facts in text, which are…

计算与语言 · 计算机科学 2021-05-27 Yujia Qin , Yankai Lin , Ryuichi Takanobu , Zhiyuan Liu , Peng Li , Heng Ji , Minlie Huang , Maosong Sun , Jie Zhou

Most successful information extraction systems operate with access to a large collection of documents. In this work, we explore the task of acquiring and incorporating external evidence to improve extraction accuracy in domains where the…

计算与语言 · 计算机科学 2016-09-29 Karthik Narasimhan , Adam Yala , Regina Barzilay

Test-time adaptation (TTA) seeks to tackle potential distribution shifts between training and testing data by adapting a given model w.r.t. any testing sample. This task is particularly important for deep models when the test environment…

机器学习 · 计算机科学 2022-06-01 Shuaicheng Niu , Jiaxiang Wu , Yifan Zhang , Yaofo Chen , Shijian Zheng , Peilin Zhao , Mingkui Tan

Existing data-free model stealing methods use a generator to produce samples in order to train a student model to match the target model outputs. To this end, the two main challenges are estimating gradients of the target model without…

机器学习 · 计算机科学 2023-09-20 James Beetham , Navid Kardan , Ajmal Mian , Mubarak Shah

This paper introduces RDA, a pioneering approach designed to address two primary deficiencies prevalent in previous endeavors aiming at stealing pre-trained encoders: (1) suboptimal performances attributed to biased optimization objectives,…

机器学习 · 计算机科学 2024-07-11 Shuchi Wu , Chuan Ma , Kang Wei , Xiaogang Xu , Ming Ding , Yuwen Qian , Tao Xiang

Autoregressive language models accumulate errors due to their fixed, irrevocable left-to-right token generation. To address this, we propose a new sampling method called Resample-Previous-Tokens (RPT). RPT mitigates error accumulation by…

机器学习 · 计算机科学 2025-06-09 Itai Gat , Neta Shaul , Uriel Singer , Yaron Lipman

Applying deep reinforcement learning (RL) on real systems suffers from slow data sampling. We propose an enhanced generative adversarial network (EGAN) to initialize an RL agent in order to achieve faster learning. The EGAN utilizes the…

人工智能 · 计算机科学 2017-05-30 Vincent Huang , Tobias Ley , Martha Vlachou-Konchylaki , Wenfeng Hu

Scheduled sampling is widely used to mitigate the exposure bias problem for neural machine translation. Its core motivation is to simulate the inference scene during training by replacing ground-truth tokens with predicted tokens, thus…

计算与语言 · 计算机科学 2021-09-01 Yijin Liu , Fandong Meng , Yufeng Chen , Jinan Xu , Jie Zhou

Previous contrastive learning methods for sentence representations often focus on insensitive transformations to produce positive pairs, but neglect the role of sensitive transformations that are harmful to semantic representations.…

计算与语言 · 计算机科学 2023-03-10 Jie Liu , Yixuan Liu , Xue Han , Chao Deng , Junlan Feng

Exemplar-Free Class Incremental Learning is a highly challenging setting where replay memory is unavailable. Methods relying on frozen feature extractors have drawn attention recently in this setting due to their impressive performances and…

机器学习 · 计算机科学 2025-02-28 Quentin Jodelet , Xin Liu , Yin Jun Phua , Tsuyoshi Murata

Adversarial Imitation Learning alternates between learning a discriminator -- which tells apart expert's demonstrations from generated ones -- and a generator's policy to produce trajectories that can fool this discriminator. This…

机器学习 · 计算机科学 2021-04-19 Paul Barde , Julien Roy , Wonseok Jeon , Joelle Pineau , Christopher Pal , Derek Nowrouzezahrai

One possible approach to tackle the class imbalance in classification tasks is to resample a training dataset, i.e., to drop some of its elements or to synthesize new ones. There exist several widely-used resampling methods. Recent research…

机器学习 · 计算机科学 2018-09-18 Smolyakov Dmitry , Alexander Korotin , Pavel Erofeev , Artem Papanov , Evgeny Burnaev

In general class-incremental learning, researchers typically use sample sets as a tool to avoid catastrophic forgetting during continuous learning. At the same time, researchers have also noted the differences between class-incremental…

机器学习 · 计算机科学 2024-08-16 Weimin Yin , Bin Chen adn Chunzhao Xie , Zhenhao Tan

Neural language models often struggle with low-resource languages due to the limited availability of training data, making tokens from these languages rare in the training set. This paper addresses a specific challenge during training: rare…

计算与语言 · 计算机科学 2026-02-02 Galim Turumtaev

In Grammatical Error Correction (GEC), sequence labeling models enjoy fast inference compared to sequence-to-sequence models; however, inference in sequence labeling GEC models is an iterative process, as sentences are passed to the model…

计算与语言 · 计算机科学 2021-06-01 Kevin Parnow , Zuchao Li , Hai Zhao

In many situations, sample data is obtained from a noisy or imperfect source. In order to address such corruptions, this paper introduces the concept of a sampling corrector. Such algorithms use structure that the distribution is purported…

数据结构与算法 · 计算机科学 2018-04-03 Clément Canonne , Themis Gouleakis , Ronitt Rubinfeld

Although deep reinforcement learning (DRL) algorithms have made important achievements in many control tasks, they still suffer from the problems of sample inefficiency and unstable training process, which are usually caused by sparse…

机器人学 · 计算机科学 2020-02-28 Ke Lin , Liang Gong , Xudong Li , Te Sun , Binhao Chen , Chengliang Liu , Zhengfeng Zhang , Jian Pu , Junping Zhang

Model free reinforcement learning suffers from the high sampling complexity inherent to robotic manipulation or locomotion tasks. Most successful approaches typically use random sampling strategies which leads to slow policy convergence. In…

机器人学 · 计算机科学 2019-08-13 Miroslav Bogdanovic , Ludovic Righetti