Results 151 to 160 of about 264,840 (333)
Associations of Rheumatoid Arthritis Disease Activity With Frailty Over Five Years of Follow‐up
Arthritis Care &Research, EarlyView.Objective To evaluate whether rheumatoid arthritis (RA) disease activity is associated with frailty both in cross‐section and longitudinally. Methods Participants within the Veterans Affairs Rheumatoid Arthritis (VARA) registry enrolled from 2003 to 2022 were included.
Courtney N. Loecker +14 more
wiley +1 more source
Arthritis Care &Research, Accepted Article.Background Obesity, defined by BMI ≥30kg/m2, is a risk factor for functional limitations in people with knee osteoarthritis (OA). However, function varies among such individuals. Our objective was to evaluate the implications of obesity subtypes on longitudinal patterns of physical functioning in people with or at risk for knee OA.
Kristine Godziuk +6 more
wiley +1 more source
Asymptotic behavior for neutral stochastic partial differential equations with infinite delays
, 2013 Jing Cui, Litan Yan
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Exponential Stability of Highly Nonlinear Hybrid Differently Structured Neutral Stochastic Differential Equations with Unbounded Delays [PDF]
, 2022 Boliang Lu, Quanxin Zhu, Ping He
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A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems
International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam +2 more
wiley +1 more source
Polynomial Chaos Expansions for the Stability Analysis of Uncertain Delay Differential Equations
, 2017 Rossana Vermiglio
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Stochastic delay differential equations
, 2020 Fizik, ekoloji, biyoloji, ekonomi, mühendeslik, finansal matematik gibi bir çok bilimalanında, olayların etkisi hemen gerçekle¸stikleri anda olmaz. Etkiler genellikle ilerleyenzamanlarda ortaya çıkar. Bu tarz sistemlerin yapılarını ve hareketlerini anlamakiçin, geçmi¸s olayların bilgi ve verilerini stokastik diferansiyel denklemlere ekleyerekgeciklemli
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Advanced Engineering Materials, EarlyView.This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira +4 more
wiley +1 more source
Qualitative Study for a Delay Quadratic Functional Integro-Differential Equation of Arbitrary (Fractional) Orders [PDF]
, 2022 A. M. A. El-Sayed +2 more
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Hysteresis-Delay Differential Equations
, 2016 In this dissertation we study differential equations with both discontinuous hysteresis of non-ideal relay type and delay terms. We study general properties (existence and uniqueness of solutions) and focus on the stability of periodic solutions. We give an application for control theory.
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