Results 141 to 150 of about 46,634 (304)
Oscillation criterion for first-order delay differential equations with sign-changing coefficients
Electronic Journal of Differential Equations, 2017 We establish conditions so that all solutions to a first-order linear delay differential equation become oscillatory. The coefficients of this equation are allowed to have negative and positive values, which is an expansion of the results in the ...
Hongwu Wu, Churong Chen, Rongkun Zhuang
doaj
Integrated Semigroups and Delay Differential Equations
Journal of Mathematical Analysis and Applications, 1993 The idea of integrated semigroup is associated with the study of the evolution equation (1) \(du/dt=Au\), where \(A\) does not satisfy all of the assumptions of the famous Hille-Yosida theorem. In such a setting integrating both sides of (1) from 0 to \(t\) we obtain a strongly continuous family of operators (not a semigroup) which is the integral of ...
openaire +2 more sources
Distinct Systemic Sclerosis Phenotypes Related to Ethnicity: An Opportunity to Personalize Care?
Arthritis Care &Research, EarlyView.Objective The objective is to describe and compare demographic, clinical, and serological characteristics of patients with systemic sclerosis (SSc) according to ethnic background. Methods Participants enrolled in the Canadian Scleroderma Research Group cohort who self‐identified to a single ethnicity group were included.
Danick Goulet +11 more
wiley +1 more source
Neutral delay differential equation model of an optically injected Kerr cavity
A neutral delay differential equation (NDDE) model of a Kerr cavity with external coherent injection is developed that can be considered as a generalization of the Ikeda map with second and higher order dispersions being taken into account.
Vladimirov, Andrei G., Dolinina, Daria
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A comparison theorem for linear delay differential equations [PDF]
, 1995 summary:In this paper property (A) of the linear delay differential equation \[ L_nu(t)+p(t)u(\tau (t))= 0, \] is to deduce from the oscillation of a set of the first order delay differential ...
Džurina, Jozef
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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
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
Mathematical models of health focusing on diabetes: Delay differential equations and data mining
Mathematical models have been applied to biology and health to gain a better understanding of physiological systems and disease, as well as to improve levels of treatment and care for certain conditions.
Easton, Jonathan
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A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection
Advanced Engineering Materials, EarlyView.A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan +9 more
wiley +1 more source
, 2006 Numerical computation of characteristic multipliers for linear time periodic coefficients delay differential ...
Vermiglio R., Breda D., MASET, STEFANO
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