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Discrete Markov random fields are undirected graphical models that capture complex conditional dependencies between discrete variables. Conducting exact posterior inference in these models is often computationally challenging because…

统计方法学 · 统计学 2026-03-10 Giuseppe Arena , Maarten Marsman

Scene coordinate regression (SCR) models have proven to be powerful implicit scene representations for 3D vision, enabling visual relocalization and structure-from-motion. SCR models are trained specifically for one scene. If training…

计算机视觉与模式识别 · 计算机科学 2025-10-15 Wenjing Bian , Axel Barroso-Laguna , Tommaso Cavallari , Victor Adrian Prisacariu , Eric Brachmann

Color names based image representation is successfully used in person re-identification, due to the advantages of being compact, intuitively understandable as well as being robust to photometric variance. However, there exists the diversity…

计算机视觉与模式识别 · 计算机科学 2017-07-11 Yang Yang , Shengcai Liao , Zhen Lei , Stan Z. Li

In this paper, we aim to take one step forward to the scenario where an adaptive subspace detection framework is required to detect subspace signals in non-stationary environments. Despite the fact that this scenario is more realistic, the…

信号处理 · 电气工程与系统科学 2024-01-24 Aref Miri Rekavandi

Accumulated Local Effects (ALE) is a widely-used explainability method for isolating the average effect of a feature on the output, because it handles cases with correlated features well. However, it has two limitations. First, it does not…

机器学习 · 计算机科学 2023-09-21 Vasilis Gkolemis , Theodore Dalamagas , Eirini Ntoutsi , Christos Diou

Covariate-adjusted randomization (CAR) can reduce the risk of covariate imbalance and, when accounted for in analysis, increase the power of a trial. Despite CAR advances, stratified randomization remains the most common CAR method. Matched…

统计方法学 · 统计学 2023-07-13 Jonathan J. Chipman , Lindsay Mayberry , Robert A. Greevy

Observational time series data often exhibit both cyclic temporal trends and autocorrelation and may also depend on covariates. As such, there is a need for flexible regression models that are able to capture these trends and model any…

Area-level models for small area estimation typically rely on areal random effects to shrink design-based direct estimates towards a model-based predictor. Incorporating the spatial dependence of the random effects into these models can…

统计方法学 · 统计学 2024-04-22 Sho Kawano , Paul A. Parker , Zehang Richard Li

Standard Gaussian graphical models (GGMs) implicitly assume that the conditional independence among variables is common to all observations in the sample. However, in practice, observations are usually collected form heterogeneous…

统计方法学 · 统计学 2010-01-26 Abel Rodriguez , Alex Lenkoski , Adrian Dobra

Estimation of the long-term health effects of air pollution is a challenging task, especially when modelling small-area disease incidence data in an ecological study design. The challenge comes from the unobserved underlying spatial…

统计方法学 · 统计学 2013-05-24 Duncan Lee , Alastair Rushworth , Sujit K. Sahu

Binary regression models are commonly used in disciplines such as epidemiology and ecology to determine how spatial covariates influence individuals. In many studies, binary data are shared in a spatially aggregated form to protect privacy.…

统计方法学 · 统计学 2021-05-10 Nelson B. Walker , Trevor J. Hefley , Anne E. Ballmann , Robin E. Russell , Daniel P. Walsh

Spectrum sensing in a large-scale heterogeneous network is very challenging as it usually requires a large number of static secondary users (SUs) to obtain the global spectrum states. To tackle this problem, in this paper, we propose a new…

信息论 · 计算机科学 2018-11-26 Yizhen Xu , Peng Cheng , Zhuo Chen , Yonghui Li , Branka Vucetic

We propose a new Bayesian approach for spatiotemporal areal data with censored and missing observations. The method introduces a flexible random effect that combines the spatial dependence structures of the Simultaneous Autoregressive (SAR)…

统计方法学 · 统计学 2026-04-14 Jose A. Ordoñez , Tsung-I Lin , Victor H. Lachos , Luis M. Castro

We propose a random forest (RF) machine learning approach to determine the accreted stellar mass fractions ($f_\mathrm{acc}$) of central galaxies, based on various dark matter halo and galaxy features. The RF is trained and tested using…

星系天体物理 · 物理学 2022-06-14 Rui Shi , Wenting Wang , Zhaozhou Li , Jiaxin Han , Jingjing Shi , Vicente Rodriguez-Gomez , Yingjie Peng , Qingyang Li

Identifying spatial heterogeneous patterns has attracted a surge of research interest in recent years, due to its important applications in various scientific and engineering fields. In practice the spatially heterogeneous components are…

统计方法学 · 统计学 2024-05-07 Xin Zhang , Shan Yu , Zhengyuan Zhu , Xin Wang

Residuals in regression models are often spatially correlated. Prominent examples include studies in environmental epidemiology to understand the chronic health effects of pollutants. I consider the effects of residual spatial structure on…

统计方法学 · 统计学 2010-11-05 Christopher J. Paciorek

We consider the problem of dense depth prediction from a sparse set of depth measurements and a single RGB image. Since depth estimation from monocular images alone is inherently ambiguous and unreliable, to attain a higher level of…

机器人学 · 计算机科学 2018-02-27 Fangchang Ma , Sertac Karaman

We present an extension of the functional data analysis framework for univariate functions to the analysis of surfaces: functions of two variables. The spatial spline regression (SSR) approach developed can be used to model surfaces that…

统计方法学 · 统计学 2013-06-17 Hien D. Nguyen , Geoffrey J. McLachlan , Ian A. Wood

Filtering out unrealistic images from trained generative adversarial networks (GANs) has attracted considerable attention recently. Two density ratio based subsampling methods---Discriminator Rejection Sampling (DRS) and Metropolis-Hastings…

机器学习 · 计算机科学 2020-04-22 Xin Ding , Z. Jane Wang , William J. Welch

We present a new method for estimating multivariate, second-order stationary Gaussian Random Field (GRF) models based on the Sparse Precision matrix Selection (SPS) algorithm, proposed by Davanloo et al. (2015) for estimating scalar GRF…

机器学习 · 统计学 2021-01-12 Sam Davanloo Tajbakhsh , Necdet Serhat Aybat , Enrique del Castillo