Results 71 to 80 of about 1,003,535 (311)

Existence and global stability of periodic solution for delayed discrete high-order Hopfield-type neural networks

open access: yesDiscrete Dynamics in Nature and Society, 2005
By using coincidence degree theory as well as a priori estimates and Lyapunov functional, we study the existence and global stability of periodic solution for discrete delayed high-order Hopfield-type neural networks.
Hong Xiang, Ke-Ming Yan, Bai-Yan Wang
doaj   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

open access: yesFEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo   +2 more
wiley   +1 more source

Periodic solutions in a linear delay difference system

open access: yesElectronic Journal of Qualitative Theory of Differential Equations
The paper investigates periodicity properties of a linear autonomous difference system with two delayed terms. Assuming that the system matrices are simultaneously triangularizable, we formulate necessary and sufficient conditions guaranteeing the ...
Jan Čermák   +2 more
doaj   +1 more source

A Global Attractor in Some Discrete Contest Competition Models with Delay under the Effect of Periodic Stocking

open access: yesAbstract and Applied Analysis, 2013
We consider discrete models of the form xn+1=xnf(xn−1)+hn, where hn is a nonnegative p-periodic sequence representing stocking in the population, and investigate their dynamics. Under certain conditions on the recruitment function f(x), we give a compact
Ziyad AlSharawi
doaj   +1 more source

On optimal periodic solution of differential equations

open access: yesJournal of Kufa for Mathematics and Computer, 2018
this paper dedicated to the construction of solution of a three time scale periodic singular perturbed non-linear quadratic optimal control problem by using the direct method.
Methaq Hamza Geem
doaj   +1 more source

Hematopoietic (stem) cells—The elixir of life?

open access: yesFEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo   +4 more
wiley   +1 more source

Periodic solutions of difference equations

open access: yesJournal of Mathematical Analysis and Applications, 2003
For the difference equation \(x_{n+1}=\beta x_n- g(x_n)\) with \(\beta> 1\) and \(g(x)= \text{sign\,}x\) for \(x\neq 0\), \(g(0)= 1\), it is shown: For any \(m\in \mathbb{N}_0\) it has a \(2^m\)-periodic solution. If \(\beta^{2^m(2k+1)}- 2\beta^{2^m(2k-1)}\geq 1\) for \(k\in \mathbb{N}\) and some \(m\in\mathbb{N}\) it has a \((2k+1)2^m\)-periodic ...
Yi, Taishan, Zhou, Zhan
openaire   +1 more source

Almost periodic solution in distribution for stochastic differential equations with Stepanov almost periodic coefficients

open access: yes, 2017
This paper deals with the existence and uniqueness of ($\mu$-pseudo) almost periodic mild solution to some evolution equations with Stepanov ($\mu$-pseudo) almost periodic coefficients, in both determinist and stochastic cases.
Bedouhene, Fazia   +4 more
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