Results 21 to 30 of about 15,642,613 (349)

Decomposed Mean Euler-Poincaré Characteristic Model for a Non-Gaussian Physiological Random Field

open access: yesIEEE Access, 2021
This paper introduces a new approach of the mean Euler-Poincaré characteristic for nonGaussian random fields (NGRF), which is based on the decomposition by a basic function named motherwave.
Moises Ramos-Martinez   +3 more
doaj   +1 more source

Reliability analysis of ground movement in tunnelling in spatially variable soil using equivalent parameters

open access: yesFrontiers in Earth Science, 2022
The evaluation of the ground movement induced by tunnelling is of vital importance for the tunnel construction and the safety of the adjacent facilities.
Wenyu Yang   +5 more
doaj   +1 more source

Random-energy model in random fields [PDF]

open access: yesPhysical Review E, 2006
The random-energy model is studied in the presence of random fields. The problem is solved exactly both in the microcanonical ensemble, without recourse to the replica method, and in the canonical ensemble using the replica formalism. The phase diagrams for bimodal and Gaussian random fields are investigated in detail. In contrast to the Gaussian case,
Filho, Luiz O. de Oliveira   +2 more
openaire   +3 more sources

Segmentation of brain MR images through a hidden Markov random field model and the expectation-maximization algorithm

open access: yesIEEE Transactions on Medical Imaging, 2001
The finite mixture (FM) model is the most commonly used model for statistical segmentation of brain magnetic resonance (MR) images because of its simple mathematical form and the piecewise constant nature of ideal brain MR images.
Yongyue Zhang   +2 more
semanticscholar   +1 more source

Graph Convolutional Networks with Markov Random Field Reasoning for Social Spammer Detection

open access: yesAAAI Conference on Artificial Intelligence, 2020
The recent growth of social networking platforms also led to the emergence of social spammers, who overwhelm legitimate users with unwanted content. The existing social spammer detection methods can be characterized into two categories: features based ...
Yongji Wu   +4 more
semanticscholar   +1 more source

On random field CAPTCHA generation [PDF]

open access: yes, 2013
Herein, we propose generating CAPTCHAs through random field simulation and give a novel, effective and efficient algorithm to do so. Indeed, we demonstrate that sufficient information about word tests for easy human recognition is contained in the site ...
Wu, B., Newton, F., Kouritzin, Michael
core   +1 more source

Simplified methods for deformation analysis of tunnel structures considering spatial variability of soil properties

open access: yesYantu gongcheng xuebao, 2022
The spatial variability of soil properties is widely accepted, and the response of a geo-structure can be significantly affected by the spatial variability of the surrounding soil mass.
ZHANG Jin-zhang 1, 2, HUANG Hong-wei 1, ZHANG Dong-ming 1, PHOON Kok-kwang 2, TANG Chong 2
doaj   +1 more source

Transformation Methods for Static Field Problems With Random Domains [PDF]

open access: yes, 2011
The numerical solution of partial differential equations onto random domains can be done by using a mapping transforming this random domain into a deterministic domain. The issue is then to determine this one to one random mapping.
J. C. Mipo   +5 more
core   +1 more source

Random Field-Based Time-Dependent Reliability Analyses of a PSC Box-Girder Bridge

open access: yesApplied Sciences, 2019
The parameters affecting structural reliability are usually regarded as independent random variables in the current reliability analyses of bridge structures while the randomness of these structural parameters in spatial distribution is neglected.
Zheheng Chen   +3 more
doaj   +1 more source

Cesàro Summation for Random Fields [PDF]

open access: yesJournal of Theoretical Probability, 2009
12pages
Gut, Allan, Stadtmüller, Ulrich
openaire   +2 more sources

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