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This article proposes an efficient Bayesian inference for piecewise exponential hazard (PEH) models, which allow the effect of a covariate on the survival time to vary over time. The proposed inference methodology is based on a particle…

统计计算 · 统计学 2020-04-01 Parfait Munezero

Dynamic feature selection (DFS) is a machine learning framework in which features are acquired sequentially for individual samples under budget constraints. The exponential growth in the number of possible feature acquisition paths forces a…

机器学习 · 计算机科学 2026-05-13 Javier Fumanal-Idocin , Raquel Fernandez-Peralta , Javier Andreu-Perez

Shrinkage estimators that possess the ability to produce sparse solutions have become increasingly important to the analysis of today's complex datasets. Examples include the LASSO, the Elastic-Net and their adaptive counterparts.…

统计方法学 · 统计学 2017-02-09 Hongmei Liu , J. Sunil Rao

Weighted finite-state automata (WSFAs) are commonly used in NLP. Failure transitions are a useful extension for compactly representing backoffs or interpolation in $n$-gram models and CRFs, which are special cases of WFSAs. The pathsum in…

数据结构与算法 · 计算机科学 2023-07-12 Anej Svete , Benjamin Dayan , Tim Vieira , Ryan Cotterell , Jason Eisner

Online learning methods, like the seminal Passive-Aggressive (PA) classifier, are still highly effective for high-dimensional streaming data, out-of-core processing, and other throughput-sensitive applications. Many such algorithms rely on…

机器学习 · 计算机科学 2024-11-01 Skyler Wu , Fred Lu , Edward Raff , James Holt

The application of deep learning in survival analysis (SA) allows utilizing unstructured and high-dimensional data types uncommon in traditional survival methods. This allows to advance methods in fields such as digital health, predictive…

机器学习 · 计算机科学 2021-11-18 Tobias Weber , Michael Ingrisch , Bernd Bischl , David Rügamer

Time series forecasting plays a crucial role in diverse fields, necessitating the development of robust models that can effectively handle complex temporal patterns. In this article, we present a novel feature selection method embedded in…

机器学习 · 计算机科学 2024-01-01 Raquel Espinosa , Fernando Jiménez , José Palma

In model-based clustering and classification, the cluster-weighted model constitutes a convenient approach when the random vector of interest constitutes a response variable Y and a set p of explanatory variables X. However, its…

统计方法学 · 统计学 2013-07-23 Sanjeena Subedi , Antonio Punzo , Salvatore Ingrassia , Paul D. McNicholas

Machine learning algorithms are designed to capture complex relationships between features. In this context, the high dimensionality of data often results in poor model performance, with the risk of overfitting. Feature selection, the…

机器学习 · 计算机科学 2023-10-18 Paolo Bonetti , Alberto Maria Metelli , Marcello Restelli

The evolve-filter (EF) model is a filter-based numerical stabilization for under-resolved convection-dominated flows. EF is a simple, modular, and effective strategy for both full-order models (FOMs) and reduced-order models (ROMs). It is…

Recent methods for long-tailed instance segmentation still struggle on rare object classes with few training data. We propose a simple yet effective method, Feature Augmentation and Sampling Adaptation (FASA), that addresses the data…

计算机视觉与模式识别 · 计算机科学 2021-10-01 Yuhang Zang , Chen Huang , Chen Change Loy

Feature selection removes redundant features to enhanc performance and computational efficiency in downstream tasks. Existing works often struggle to capture complex feature interactions and adapt to diverse scenarios. Recent advances in…

机器学习 · 计算机科学 2026-03-02 Rui Liu , Rui Xie , Zijun Yao , Yanjie Fu , Dongjie Wang

Under distribution shift (DS) where the training data distribution differs from the test one, a powerful technique is importance weighting (IW) which handles DS in two separate steps: weight estimation (WE) estimates the test-over-training…

机器学习 · 计算机科学 2020-11-06 Tongtong Fang , Nan Lu , Gang Niu , Masashi Sugiyama

The interest in variable selection for clustering has increased recently due to the growing need in clustering high-dimensional data. Variable selection allows in particular to ease both the clustering and the interpretation of the results.…

统计方法学 · 统计学 2012-04-11 Charles Bouveyron , Camille Brunet

The performance of deep neural networks, such as Deep Belief Networks formed by Restricted Boltzmann Machines (RBMs), strongly depends on their training, which is the process of adjusting their parameters. This process can be posed as an…

神经与进化计算 · 计算机科学 2019-07-16 S. Ivvan Valdez , Alfonso Rojas-Domínguez

Autonomous navigation is reshaping various domains in people's life by enabling efficient and safe movement in complex environments. Reliable navigation requires algorithmic approaches that compute optimal or near-optimal trajectories while…

机器人学 · 计算机科学 2025-03-05 Yifei Wang , Jacky Keung , Haohan Xu , Yuchen Cao , Zhenyu Mao

Machine Learning (ML) techniques are becoming an invaluable support for network intrusion detection, especially in revealing anomalous flows, which often hide cyber-threats. Typically, ML algorithms are exploited to classify/recognize data…

密码学与安全 · 计算机科学 2021-04-13 Mario Di Mauro , Giovanni Galatro , Giancarlo Fortino , Antonio Liotta

Global optimisation problems in high-dimensional and infinite dimensional spaces arise in various real-world applications such as engineering, economics, geophysics, biology, machine learning, optimal control, etc. Among stochastic…

最优化与控制 · 数学 2021-01-06 Andrew Yu. Morozov , Oleg Kuzenkov , Simran K. Sandhu

Every organism in an environment, whether biological, robotic or virtual, must be able to predict certain aspects of its environment in order to survive or perform whatever task is intended. It needs a model that is capable of estimating…

机器学习 · 计算机科学 2013-11-12 Stefan Richthofer , Laurenz Wiskott

Increasing interest in the adoption of cloud computing has exposed it to cyber-attacks. One of such is distributed denial of service (DDoS) attack that targets cloud bandwidth, services and resources to make it unavailable to both the cloud…

密码学与安全 · 计算机科学 2018-07-30 Opeyemi Osanaiye , Kim-Kwang Raymond Choo2 , Ali Dehghantanha , Zheng Xu , Mqhele Dlodlo