Results 71 to 80 of about 9,017,418 (195)

Positive periodic solutions and nonlinear eigenvalue problems for functional differential equations

Electronic Journal of Qualitative Theory of Differential Equations, 2012
This paper is devoted to investigate the existence of positive periodic solution for a functional differential equation in the form of $\lambda\mathbb{L}x=-b(t)f(x(t-\tau(t))),$ where $\mathbb{L}x=x'(t)-a(t)g(x(t))x(t)$.
Xuemei Zhang
doaj   +1 more source

Dynamic Behavior of a Delayed Model with One Core Enterprise and Four Satellite Enterprises

AppliedMath
In this paper, an economic competition–cooperation model is examined, which has one core enterprise and four satellite enterprises. This extends previous smaller models in the literature mathematically.
Chunhua Feng
doaj   +1 more source

Existence, uniqueness and stability of solutions to a delay hematopoiesis model

Journal of Innovative Applied Mathematics and Computational Sciences, 2022
This work aims to investigate a delay hematopoiesis model where the delay depends on both the time and the current density of mature blood cells. Based on the Banach contraction principle, the Schauder's fixed point theorem and some properties of a ...
Ahlème Bouakkaz, Rabah Khemis
doaj  

Robust and Minimum Norm Pole Assignment with Periodic State Feedback [PDF]

, 2000
A computational approach is proposed to solve the minimum norm or robust pole assignment problem for linear periodic discrete-time systems. The proposed approach uses a periodic Sylvester-equation-based parametrization of the periodic pole assignment ...
Varga, A.
core  

Existence and global asymptotic stability of positive periodic solutions of a Lotka-Volterra type competition systems with delays and feedback controls

Electronic Journal of Differential Equations, 2013
The existence of positive periodic solutions of a periodic Lotka-Volterra type competition system with delays and feedback controls is studied by applying the continuation theorem of coincidence degree theory.
Anh Tuan Trinh
doaj  

Positive Almost Periodic Solution for Impulsive Nicholson’s Blowflies Model with Linear Harvesting Term on the Bounded Domain

, 2015
In this paper, impulsive Nicholson’s blowflies model with linear harvesting term is studied. By using the contraction mapping fixed point theorem, we obtain sufficient conditions for the existence of a unique positive almost periodic solution.
Zhijian Yao
core   +1 more source

Positive solution for first-order discrete periodic boundary value problem

, 2006
In this work, existence criteria for a positive solution for the following first-order discrete periodic boundary value problem: Δx(k)+f(k,x(k+1))=0,k∈[0,T]x(0)=x(T+1) are established by using a fixed point theorem for operators on a cone.
Sun, Jian-Ping
core   +1 more source

Dynamics of a Nonautonomous Leslie-Gower Type Food Chain Model with Delays

Discrete Dynamics in Nature and Society, 2011
A nonautonomous Leslie-Gower type food chain model with time delays is investigated. It is proved the general nonautonomous system is permanent and globally asymptotically stable under some appropriate conditions.
Hongying Lu, Weiguo Wang
doaj   +1 more source

Computation of transfer function matrices of periodic systems [PDF]

, 2002
We present a numerical approach to evaluate the transfer function matrices of a periodic system corresponding to lifted state-space representations as constant systems.
A. Varga, Varga, Andras
core   +1 more source

Periodic solution and stationary distribution of a stochastic epidemic model with two different epidemics and different epidemiological frameworks

Electronic Journal of Differential Equations
In epidemiology, more than one infectious disease can pose a risk to the host population. This area of study has attracted researchers in recent times.
Shivam Kumar Mishra, Syed Abbas, Juan Jose Nieto   +2 more
doaj