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We introduce a family of multitask variational methods for semi-supervised sequence labeling. Our model family consists of a latent-variable generative model and a discriminative labeler. The generative models use latent variables to define…

计算与语言 · 计算机科学 2019-06-25 Mingda Chen , Qingming Tang , Karen Livescu , Kevin Gimpel

A key challenge for machine intelligence is to learn new visual concepts without forgetting the previously acquired knowledge. Continual learning is aimed towards addressing this challenge. However, there is a gap between existing…

机器学习 · 计算机科学 2024-02-01 Yan Luo , Yongkang Wong , Mohan Kankanhalli , Qi Zhao

Label smoothing is widely used in deep neural networks for multi-class classification. While it enhances model generalization and reduces overconfidence by aiming to lower the probability for the predicted class, it distorts the predicted…

机器学习 · 计算机科学 2021-10-12 Mohamed Maher , Meelis Kull

Deep Generative Models (DGMs) are versatile tools for learning data representations while adequately incorporating domain knowledge such as the specification of conditional probability distributions. Recently proposed DGMs tackle the…

机器学习 · 计算机科学 2024-01-30 Romain Lopez , Jan-Christian Huetter , Ehsan Hajiramezanali , Jonathan Pritchard , Aviv Regev

We present a novel method for training score-based generative models which uses nonlinear noising dynamics to improve learning of structured distributions. Generalizing to a nonlinear drift allows for additional structure to be incorporated…

机器学习 · 统计学 2025-07-10 Jeremiah Birrell , Markos A. Katsoulakis , Luc Rey-Bellet , Benjamin J. Zhang , Wei Zhu

Scene graph generation (SGG) models have suffered from inherent problems regarding the benchmark datasets such as the long-tailed predicate distribution and missing annotation problems. In this work, we aim to alleviate the long-tailed…

计算机视觉与模式识别 · 计算机科学 2024-08-05 Kibum Kim , Kanghoon Yoon , Yeonjun In , Jinyoung Moon , Donghyun Kim , Chanyoung Park

Several works have aimed to explain why overparameterized neural networks generalize well when trained by Stochastic Gradient Descent (SGD). The consensus explanation that has emerged credits the randomized nature of SGD for the bias of the…

机器学习 · 计算机科学 2021-02-24 Shengchao Liu , Dimitris Papailiopoulos , Dimitris Achlioptas

In practice, machine learning experts are often confronted with imbalanced data. Without accounting for the imbalance, common classifiers perform poorly and standard evaluation metrics mislead the practitioners on the model's performance. A…

机器学习 · 计算机科学 2020-07-21 Ramiro Camino , Christian Hammerschmidt , Radu State

In order to train robust deep learning models, large amounts of labelled data is required. However, in the absence of such large repositories of labelled data, unlabeled data can be exploited for the same. Semi-Supervised learning aims to…

机器学习 · 计算机科学 2021-07-20 Soumyadeep Ghosh , Sanjay Kumar , Janu Verma , Awanish Kumar

Many classification problems involve data instances that are interlinked with each other, such as webpages connected by hyperlinks. Techniques for "collective classification" (CC) often increase accuracy for such data graphs, but usually…

机器学习 · 计算机科学 2012-07-03 Luke McDowell , David Aha

Score-based generative models (SGMs) have recently shown impressive results for difficult generative tasks such as the unconditional and conditional generation of natural images and audio signals. In this work, we extend these models to the…

音频与语音处理 · 电气工程与系统科学 2022-07-08 Simon Welker , Julius Richter , Timo Gerkmann

We consider learning a sequence classifier without labeled data by using sequential output statistics. The problem is highly valuable since obtaining labels in training data is often costly, while the sequential output statistics (e.g.,…

机器学习 · 计算机科学 2017-05-30 Yu Liu , Jianshu Chen , Li Deng

Deep clustering as an important branch of unsupervised representation learning focuses on embedding semantically similar samples into the identical feature space. This core demand inspires the exploration of contrastive learning and…

计算机视觉与模式识别 · 计算机科学 2024-04-16 Haifeng Xia , Hai Huang , Zhengming Ding

Score-based graph generative models (SGGMs) have proven effective in critical applications such as drug discovery and protein synthesis. However, their theoretical behavior, particularly regarding convergence, remains underexplored. Unlike…

机器学习 · 计算机科学 2025-08-21 Junwei Su , Chuan Wu

Overconfidence has been shown to impair generalization and calibration of a neural network. Previous studies remedy this issue by adding a regularization term to a loss function, preventing a model from making a peaked distribution. Label…

机器学习 · 计算机科学 2022-10-26 Dongkyu Lee , Ka Chun Cheung , Nevin L. Zhang

As one of the central tasks in machine learning, regression finds lots of applications in different fields. An existing common practice for solving regression problems is the mean square error (MSE) minimization approach or its regularized…

机器学习 · 统计学 2022-11-24 Jirong Yi , Qiaosheng Zhang , Zhen Chen , Qiao Liu , Wei Shao , Yusen He , Yaohua Wang

Over-parameterized deep models usually over-fit to a given training distribution, which makes them sensitive to small changes and out-of-distribution samples at inference time, leading to low generalization performance. To this end, several…

计算机视觉与模式识别 · 计算机科学 2019-12-12 Saeid Asgari Taghanaki , Kumar Abhishek , Ghassan Hamarneh

Many existing conditional score-based data generation methods utilize Bayes' theorem to decompose the gradients of a log posterior density into a mixture of scores. These methods facilitate the training procedure of conditional score…

In this paper, we investigate a challenging unsupervised domain adaptation setting -- unsupervised model adaptation. We aim to explore how to rely only on unlabeled target data to improve performance of an existing source prediction model…

计算机视觉与模式识别 · 计算机科学 2025-02-27 Rui Li , Qianfen Jiao , Wenming Cao , Hau-San Wong , Si Wu

Modern machine learning systems have demonstrated substantial abilities with methods that either embrace or ignore human-provided knowledge, but combining benefits of both styles remains a challenge. One particular challenge involves…

机器学习 · 计算机科学 2024-08-09 Marc Pickett , Aakash Kumar Nain , Joseph Modayil , Llion Jones