Results 121 to 130 of about 832,966 (358)

Regular, pseudo-regular, and almost regular matrices

, 2007
We give lower bounds on the largest singular value of arbitrary matrices, some of which are asymptotically tight for almost all matrices. To study when these bounds are exact, we introduce several combinatorial concepts. In particular, we introduce regular, pseudo-regular, and almost regular matrices.
openaire   +2 more sources

Quantitative Shape Irregularity and Density Heterogeneity Predict Hematoma Expansion in Patients With Intracerebral Hemorrhage

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Purpose This study aimed to explore the association between quantitative shape irregularity and density heterogeneity of hematomas and hematoma expansion (HE) for intracerebral hemorrhage (ICH) patients. Methods This cohort study included patients arriving within 24 h of symptom onset between August 2021 and July 2022 as the derivation cohort ...
Zeqiang Ji, Yunyi Hao, Bin Gao, Xiaojing Zhang, Yani Zhang, Jiaokun Jia, Xue Xia, Yuhao Guo, Sijia Li, Jianwei Wu, Kaijiang Kang, Xingquan Zhao   +11 more
wiley   +1 more source

Regularity of planar flows for shear-thickening fluids under perfect slip boundary conditions

Electronic Journal of Differential Equations, 2014
For evolutionary planar flows of shear-thickening fluids in bounded domains we prove the existence of a solution with the Holder continuous velocity gradients and pressure. The problem is equipped with perfect slip boundary conditions.
Jakub Tichy
doaj  

Juvenile Idiopathic Arthritis, Earnings, and Work Loss: A Nationwide Matched Cohort Study

Arthritis Care &Research, EarlyView.
Objective This study compares trajectories of earnings and work loss in individuals with juvenile idiopathic arthritis (JIA) versus matched comparators from the general population. Methods Patients with JIA (n = 4,737) were identified in the Swedish National Patient Register (2001–2017) and individually matched to up to five general population ...
Heather Miller, Martin Neovius, Erik Sundberg, Johan Askling, Gustaf Bruze   +4 more
wiley   +1 more source

Diverse Treatment Goals in Psoriatic Arthritis: Insights From Participants in the PARC Cohort

Arthritis Care &Research, EarlyView.
Objective The aim of this study was to examine patient‐reported treatment goals among individuals with psoriatic arthritis. Methods Participants in the Psoriatic Arthritis Research Consortium completed standardized assessments, including patient‐reported outcome (PROs) instruments, between 2017 and 2020.
Astia Allenzara, Kathleen Bush, M. Elaine Husni, Soumya M. Reddy, Jose U. Scher, Ethan Craig, Joelle Koplin, Jessica A. Walsh, Alexis Ogdie   +8 more
wiley   +1 more source

Regularity of weak solutions to the magneto-hydrodynamics equations in terms of the direction of velocity

Electronic Journal of Differential Equations, 2009
In this article, we study the regularity of weak solutions to the 3D incompressible magneto-hydrodynamics equations. We obtain a new class of regularity criteria in terms of the direction of the velocity.
Yuwen Luo
doaj  

Iterative regularization for low complexity regularizers

Numerische Mathematik
Iterative regularization exploits the implicit bias of an optimization algorithm to regularize ill-posed problems. Constructing algorithms with such built-in regularization mechanisms is a classic challenge in inverse problems but also in modern machine learning, where it provides both a new perspective on algorithms analysis, and significant speed-ups
Molinari C., Massias M., Rosasco L., Villa S.   +3 more
openaire   +2 more sources

Regular Partitions of Regular Graphs [PDF]

Canadian Mathematical Bulletin, 1978
In the study of the combinatorial structure of edge-graphs of convex polytopes one may ask whether a given graph possesses a partition consisting of certain kinds of subgraphs.In this paper we describe some special partitions of 3-valent and 4-valent graphs.
openaire   +2 more sources

Risk of Hepatotoxicity in Patients With Gout Treated With Febuxostat or Benzbromarone: A Propensity Score–Matched Cohort Study

Arthritis Care &Research, EarlyView.
Objective The objective of this study was to evaluate and compare the risk of hepatotoxicity associated with the use of febuxostat and benzbromarone in patients with gout. Methods New users of febuxostat or benzbromarone with monitoring of liver function at least three times in a year after initiation of the study drugs were identified from an ...
Wenyan Sun, Lingling Cui, Robert Terkeltaub, Ying Chen, Xinde Li, Xiaoyu Cheng, Tian Liu, Nicola Dalbeth, Changgui Li   +8 more
wiley   +1 more source

Regularity of large solutions for the compressible magnetohydrodynamic equations

Boundary Value Problems, 2011
In this paper, we consider the initial-boundary value problem of one-dimensional compressible magnetohydrodynamics flows. The existence and continuous dependence of global solutions in H 1 have been established in Chen and Wang (Z Angew Math Phys 54, 608-
Qin Yuming, Peng Xiaozhen, Liu Xin
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