Results 81 to 90 of about 77,815 (315)

Diffusion limits of the random walk Metropolis algorithm in high dimensions [PDF]

, 2012
Diffusion limits of MCMC methods in high dimensions provide a useful theoretical tool for studying computational complexity. In particular, they lead directly to precise estimates of the number of steps required to explore the target measure, in ...
Stuart, Andrew M., Andrew M. Stuart, Mattingly, JC, Mattingly, Jonathan C., Stuart, AM, Jonathan C. Mattingly, Natesh S. Pillai, Pillai, Natesh S., Stuart, A. M., Pillai, NS   +9 more
core   +1 more source

Diffusion Approximations of Branching Processes

The Annals of Mathematical Statistics, 1971
For $n = 1,2, \cdots$ let $z^{(n)}_t, t \geqq 0$, be an age-dependent branching process starting from $n$ ancestors. Suppose it has the reproduction generating function $f_n, f_n'(1) = 1 + \alpha/n + o(n^{-1}), f_n''(1) = 2\beta_n \rightarrow 2\beta, f_n'''(1-) \leqq$ some constant, and the life-length distribution $L$ with $L(0) = 0$ and $\lambda ...
openaire   +3 more sources

Reperfusion‐Dependent Outcomes After Endovascular Thrombectomy Stratified by NIHSS‐ASPECTS Clinical‐Core Mismatch

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective This analysis evaluates the effect of successful reperfusion on functional outcomes after MT, stratified by admission National Institutes of Health Stroke Scale (NIHSS) and Alberta Stroke Program Early CT Score (ASPECTS) as surrogates for clinical‐core mismatch, using multicenter registry data.
Felix Schlicht, Lukas Meyer, Gabriel Broocks, Matthias Bechstein, Christian Thaler, Christian Heitkamp, Laurens Winkelmeier, Vincent Geest, Alexander Heitkamp, Maximilian Jungnitz, Gregor Peter, Luca Meucci, Tobias Faizy, Jawed Nawabi, Caspar Brekenfeld, Fabian Flottmann, Maximilian Schell, Alexandros Hadjilaou, Uta Hanning, Götz Thomalla, Jens Fiehler, Susanne Gellißen, Helge C. Kniep, for the German Stroke Registry Endovascular Treatment, (GSR‐ET) Alexander Nave, Anna Alegiani, Annerose Mengel, Arno Reich, Bernd Eckert, Charlotte Pietrock, Christian Nolte, Eberhard Siebert, Fabian Flottmann, Fee Keil, Franziska Dorn, Gabor Petzold, Götz Thomalla, Hanna Zimmermann, Jan Borggrefe, Jan Hendrik Schäfer, Jens Fiehler, Joachim Röther, Klaus Gröschel, Lars Kellert, Mario Abruscato, Maximilian Schell, Omid Nikoubashman, Peter Schellinger, Silke Wunderlich, Steffen Tiedt, Sven Thonke, Timo Uphaus, Tobias Boeckh‐Behrens, Ulrike Ernemann   +53 more
wiley   +1 more source

Model-agnostic neural mean field with a data-driven transfer function

Neuromorphic Computing and Engineering
As one of the most complex systems known to science, modeling brain behavior and function is both fascinating and extremely difficult. Empirical data is increasingly available from ex vivo human brain organoids and surgical samples, as well as in vivo ...
Alex Spaeth, David Haussler, Mircea Teodorescu   +2 more
doaj   +1 more source

Equilibrium and non-equilibrium diffusion approximation for the radiative transfer equation

European Journal of Applied Mathematics
In this paper, we study the distribution of the temperature within a body where the heat is transported only by radiation. Specifically, we consider the situation where both emission-absorption and scattering processes take place.
Elena Demattè, Juan J. L. Velázquez
doaj   +1 more source

RNA Sequencing Resolves Cryptic Pathogenic Variants in Mitochondrial Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Mitochondrial diseases are the most common inherited metabolic disorders, characterized by pronounced clinical and genetic heterogeneity that complicates molecular diagnosis. Although DNA‐based sequencing approaches have become standard in genetic testing, up to half of patients remain without a definitive diagnosis.
Zhimei Liu, Xin Duan, Fatemeh Peymani, Jia Wang, Chengjia Bao, Chaolong Xu, Ying Zou, Zixuan Zhang, Yunxi Zhang, Tongyue Li, Martin Pavlov, Junling Wang, Minhan Song, Tianyu Song, Xiaodi Han, Mingxi Sun, Danmin Shen, Ruoyu Duan, Huafang Jiang, Manting Xu, Holger Prokisch, Fang Fang   +21 more
wiley   +1 more source

Asymptotical analysis and Padé approximation in problems on diffusion-controlled cracks propagation

Revista de Matemática: Teoría y Aplicaciones, 2012
In this work, we consider the diffusion-controlled axisymmetric fracture in an infinite space, and half-space. An important example of diffusion-controlled fracture growth is given by hydrogen induced cracking.
Alla V. Balueva, Leonid N. Germanovich
doaj   +1 more source

High‐Resolution MRI Revealed Different Etiology‐Specific Associations With Cerebral Infarction in Adult Moyamoya Vasculopathy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective High‐resolution MRI enables detailed assessment of intracranial vessel wall pathology in moyamoya vasculopathy. We aimed to classify adult moyamoya vasculopathy etiologies using high‐resolution MRI and to examine subtype‐specific associations between high‐resolution MRI features and ischemic infarction.
Guangsong Han, Jiachun Pan, Yuehui Hong, Xiaoyuan Fan, Ming Yao, Lixin Zhou, Yicheng Zhu, Feng Feng, Jun Ni   +8 more
wiley   +1 more source

Projection of two-dimensional diffusion in a curved midline and narrow varying width channel embedded on a curved surface

, 2013
This study focuses on the derivation of a general effective diffusion coefficient to describe the twodimensional (2D) diffusion in a narrow and smoothly asymmetric channel of varying width that lies on a curved surface, in the simple diffusional motion ...
Pineda, Inti, Dagdug, Leonardo, Chacón-Acosta, Guillermo   +2 more
core  

On diffusion approximations for filtering

Stochastic Processes and their Applications, 1991
Following the earlier paper by \textit{H. J. Kushner} and \textit{W. J. Runggaldier} [IEEE Trans. Autom. Control AC-32, 123-133 (1987; Zbl 0617.93060)], the authors consider a family of processes \((X^{\epsilon},Y^{\epsilon})\) where \(X^{\epsilon}=(X^{\epsilon}_ t)\) is unobservable, while \(Y^{\epsilon}=(Y^{\epsilon}_ t)\) is observable.
Liptser, Robert Sh., Runggaldier, Wolfgang J.   +1 more
openaire   +1 more source