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This paper addresses graph learning in Gaussian Graphical Models (GGMs). In this context, data matrices often come with auxiliary metadata (e.g., textual descriptions associated with each node) that is usually ignored in traditional graph…

Machine Learning · Statistics 2026-02-19 Jianhua Wang , Killian Cressant , Pedro Braconnot Velloso , Arnaud Breloy

Large Language Models (LLMs) are a powerful tool for statistical text analysis, with derived sequences of next-token probability distributions offering a wealth of information. Extracting this signal typically relies on metrics such as…

We propose the Gaussian-Linear Hidden Markov model (GLHMM), a generalisation of different types of HMMs commonly used in neuroscience. In short, the GLHMM is a general framework where linear regression is used to flexibly parameterise the…

Neurons and Cognition · Quantitative Biology 2024-10-02 Diego Vidaurre , Laura Masaracchia , Nick Y. Larsen , Lenno R. P. T Ruijters , Sonsoles Alonso , Christine Ahrends , Mark W. Woolrich

A longstanding problem in machine learning is to find unsupervised methods that can learn the statistical structure of high dimensional signals. In recent years, GANs have gained much attention as a possible solution to the problem, and in…

Computer Vision and Pattern Recognition · Computer Science 2018-11-06 Eitan Richardson , Yair Weiss

Distributed optimization is fundamental to large-scale machine learning and control applications. Among existing methods, the alternating direction method of multipliers (ADMM) has gained popularity due to its strong convergence guarantees…

Machine Learning · Computer Science 2026-04-15 Henri Doerks , Paul Häusner , Daniel Hernández Escobar , Jens Sjölund

Deep Neural Networks (DNN) are known to be vulnerable to adversarial samples, the detection of which is crucial for the wide application of these DNN models. Recently, a number of deep testing methods in software engineering were proposed…

Machine Learning · Computer Science 2021-07-16 Zuohui Chen , Renxuan Wang , Jingyang Xiang , Yue Yu , Xin Xia , Shouling Ji , Qi Xuan , Xiaoniu Yang

Granular materials (GMs) are ubiquitous in daily life. Understanding their properties is also important, especially in agriculture and industry. However, existing works require dedicated measurement equipment and also need large human…

Computer Vision and Pattern Recognition · Computer Science 2024-12-04 Zeqing Zhang , Guangze Zheng , Xuebo Ji , Guanqi Chen , Ruixing Jia , Wentao Chen , Guanhua Chen , Liangjun Zhang , Jia Pan

The problem of identifying change points in high-dimensional Gaussian graphical models (GGMs) in an online fashion is of interest, due to new applications in biology, economics and social sciences. The offline version of the problem, where…

Statistics Theory · Mathematics 2020-03-18 Hossein Keshavarz , George Michailidis

In this paper a scheme for offline Handwritten Devnagari Character Recognition is proposed, which uses different feature extraction methodologies and recognition algorithms. The proposed system assumes no constraints in writing style or…

Computer Vision and Pattern Recognition · Computer Science 2010-07-01 S. Arora , Debotosh Bhattacharjee , M. Nasipuri , D. K. Basu , M. Kundu

Psychological studies have shown that Micro Gestures (MG) are closely linked to human emotions. MG-based emotion understanding has attracted much attention because it allows for emotion understanding through nonverbal body gestures without…

Computer Vision and Pattern Recognition · Computer Science 2024-05-06 Deng Li , Bohao Xing , Xin Liu

Text detection and segmentation is an important prerequisite for many content based image analysis tasks. The paper proposes a novel text extraction and character segmentation algorithm using Maximally Stable Extremal Regions as basic…

Computer Vision and Pattern Recognition · Computer Science 2016-08-12 Nitigya Sambyal , Pawanesh Abrol

Handwritten font generation is important for preserving cultural heritage and creating personalized designs. It adds an authentic and expressive touch to printed materials, making them visually appealing and establishing a stronger…

Computer Vision and Pattern Recognition · Computer Science 2024-04-05 Preeti P. Bhatt , Jitendra V. Nasriwala , Rakesh R. Savant

We describe two new open source tools written in Python for performing extreme deconvolution Gaussian mixture modeling (XDGMM) and using a conditioned model to re-sample observed supernova and host galaxy populations. XDGMM is new program…

Instrumentation and Methods for Astrophysics · Physics 2017-05-24 Thomas W. -S. Holoien , Philip J. Marshall , Risa H. Wechsler

We investigated the use of Empirical Mode Decomposition (EMD) combined with Gaussian Mixture Models (GMM), feature engineering and machine learning algorithms to optimize trading decisions. We used five, two, and one year samples of hourly…

Methodology · Statistics 2025-03-27 Gabriel R. Palma , Mariusz Skoczeń , Phil Maguire

A common task is the determination of system parameters from spectroscopy, where one compares the experimental spectrum with calculated spectra, that depend on the desired parameters. Here we discuss an approach based on a machine learning…

Quantum Physics · Physics 2022-05-04 Farhad Taher-Ghahramani , Fulu Zheng , Alexander Eisfeld

Deep generative models are commonly used for generating images and text. Interpretability of these models is one important pursuit, other than the generation quality. Variational auto-encoder (VAE) with Gaussian distribution as prior has…

Machine Learning · Computer Science 2020-08-24 Wenxian Shi , Hao Zhou , Ning Miao , Lei Li

We present a new framework to detect various types of variable objects within massive astronomical time-series data. Assuming that the dominant population of objects is non-variable, we find outliers from this population by using a…

Instrumentation and Methods for Astrophysics · Physics 2010-01-17 Min-Su Shin , Michael Sekora , Yong-Ik Byun

In recent literature, the Gaussian Graphical model (GGM; Lauritzen, 1996),a network of partial correlation coefficients, has been used to capture potential dynamic relationships between observed variables. The GGM can be estimated using…

Methodology · Statistics 2017-09-25 Sacha Epskamp

Handwritten character recognition is one of the most challenging and ongoing areas of research in the field of pattern recognition. HCR research is matured for foreign languages like Chinese and Japanese but the problem is much more complex…

Computer Vision and Pattern Recognition · Computer Science 2014-02-11 Anitha Mary M. O. Chacko , P. M Dhanya

Probability theory has become the predominant framework for quantifying uncertainty across scientific and engineering disciplines, with a particular focus on measurement and control systems. However, the widespread reliance on simple…

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