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We give a deterministic algorithm for approximately counting satisfying assignments of a degree-$d$ polynomial threshold function (PTF). Given a degree-$d$ input polynomial $p(x_1,\dots,x_n)$ over $R^n$ and a parameter $\epsilon> 0$, our…

计算复杂性 · 计算机科学 2013-12-02 Anindya De , Rocco Servedio

Ancestral graph models, introduced by Richardson and Spirtes (2002), generalize both Markov random fields and Bayesian networks to a class of graphs with a global Markov property that is closed under conditioning and marginalization. By…

统计方法学 · 统计学 2012-07-19 Mathias Drton , Thomas S. Richardson

We present Causal Posterior Estimation (CPE), a novel method for Bayesian inference in simulator models, i.e., models where the evaluation of the likelihood function is intractable or too computationally expensive, but where one can…

机器学习 · 计算机科学 2025-05-28 Simon Dirmeier , Antonietta Mira

This work explores an unexpected application of Implicit Computational Complexity (ICC) to parallelize loops in imperative programs. Thanks to a lightweight dependency analysis, our algorithm allows splitting a loop into multiple loops that…

编程语言 · 计算机科学 2022-06-20 Clément Aubert , Thomas Rubiano , Neea Rusch , Thomas Seiller

There is growing interest in learning Fourier domain sampling strategies (particularly for magnetic resonance imaging, MRI) using optimization approaches. For non-Cartesian sampling patterns, the system models typically involve non-uniform…

图像与视频处理 · 电气工程与系统科学 2023-02-07 Guanhua Wang , Jeffrey A. Fessler

We propose a method for finding a cumulative distribution function (cdf) that minimizes the distance to a given cdf, while belonging to an ambiguity set constructed relative to another cdf and, possibly, incorporating soft information. Our…

最优化与控制 · 数学 2024-08-23 Julio Deride , Johannes O. Royset , Fernanda Urrea

Kernel methods are widespread in machine learning; however, they are limited by the quadratic complexity of the construction, application, and storage of kernel matrices. Low-rank matrix approximation algorithms are widely used to address…

机器学习 · 统计学 2021-05-05 Ruoxi Wang , Yingzhou Li , Michael W. Mahoney , Eric Darve

A predictive control barrier function (PCBF) based safety filter is a modular framework to verify safety of a control input by predicting a future trajectory. The approach relies on the solution of two optimization problems, first computing…

系统与控制 · 电气工程与系统科学 2023-07-25 Alexandre Didier , Robin C. Jacobs , Jerome Sieber , Kim P. Wabersich , Melanie N. Zeilinger

Hybrid Bayesian networks (HBN) contain complex conditional probabilistic distributions (CPD) specified as partitioned expressions over discrete and continuous variables. The size of these CPDs grows exponentially with the number of parent…

人工智能 · 计算机科学 2024-02-26 Peng Lin , Martin Neil , Norman Fenton

We describe a version of an algorithm for evolving self-gravitating collections of particles that should be nearly ideal for parallel architectures. Our method is derived from the ``self-consistent field'' (SCF) approach suggested…

天体物理学 · 物理学 2016-08-30 Lars Hernquist , Steinn Sigurdsson , Greg L. Bryan

Gaussian processes are flexible, probabilistic, non-parametric models widely used in machine learning and statistics. However, their scalability to large data sets is limited by computational constraints. To overcome these challenges, we…

机器学习 · 统计学 2026-05-25 Tim Gyger , Reinhard Furrer , Fabio Sigrist

Bayesian experimental design involves the optimal allocation of resources in an experiment, with the aim of optimising cost and performance. For implicit models, where the likelihood is intractable but sampling from the model is possible,…

机器学习 · 统计学 2019-02-26 Steven Kleinegesse , Michael Gutmann

The "Inertial Forward-Backward algorithm" (IFB) is a powerful tool for convex nonsmooth minimization problems, it gives the well known "fast iterative shrinkage-thresholding algorithm " (FISTA), which enjoys $O\left( {\frac{1}{{{k^2}}}}…

最优化与控制 · 数学 2022-02-25 Hongwei Liu , Ting Wang , Zexian Liu

Conditional Random Fields (CRF) have been widely used in a variety of computer vision tasks. Conventional CRFs typically define edges on neighboring image pixels, resulting in a sparse graph such that efficient inference can be performed.…

计算机视觉与模式识别 · 计算机科学 2016-11-17 Peng Wang , Chunhua Shen , Anton van den Hengel

Imagine we want to split a group of agents into teams in the most \emph{efficient} way, considering that each agent has their own preferences about their teammates. This scenario is modeled by the extensively studied \textsc{Coalition…

数据结构与算法 · 计算机科学 2025-05-29 Foivos Fioravantes , Harmender Gahlawat , Nikolaos Melissinos

To develop a trustworthy AI system, which aim to identify the input regions that most influence the models decisions. The primary task of existing attribution methods lies in efficiently and accurately identifying the relationships among…

机器学习 · 计算机科学 2026-05-20 Ruoyu Chen , Siyuan Liang , Jingzhi Li , Shiming Liu , Li Liu , Hua Zhang , Xiaochun Cao

Many methods for machine learning rely on approximate inference from intractable probability distributions. Variational inference approximates such distributions by tractable models that can be subsequently used for approximate inference.…

机器学习 · 计算机科学 2020-10-08 Oleg Arenz , Mingjun Zhong , Gerhard Neumann

Approximate Bayesian computation (ABC) is commonly used for parameter estimation and model comparison for intractable simulator-based models whose likelihood function cannot be evaluated. In this paper we instead investigate the feasibility…

统计方法学 · 统计学 2022-09-13 Marko Järvenpää , Jukka Corander

We propose an efficient algorithm for solving orthogonal canonical correlation analysis (OCCA) in the form of trace-fractional structure and orthogonal linear projections. Even though orthogonality has been widely used and proved to be a…

机器学习 · 计算机科学 2019-09-26 Leihong Zhang , Li Wang , Zhaojun Bai , Ren-cang Li

Bayesian posterior distributions naturally represent parameter uncertainty informed by data. However, when the parameter space is complex, as in many nonparametric settings where it is infinite-dimensional or combinatorially large, standard…

统计方法学 · 统计学 2025-12-22 Nicola Bariletto , Nhat Ho , Alessandro Rinaldo