Results 41 to 50 of about 517,273 (291)
Asymptotic Spreading for General Heterogeneous Fisher-KPP Type Equations
Memoirs of the American Mathematical Society, 2022 In this monograph, we review the theory and establish new and general results regarding spreading properties for heterogeneous reaction-diffusion equations:
Berestycki, Henri, Nadin, Grégoire
openaire +2 more sources
Dynamics for a Ratio-Dependent Prey–Predator Model with Different Free Boundaries
MathematicsIn this paper, we study the dynamics of the ratio-dependent type prey–predator model with different free boundaries. The two free boundaries, determined by prey and predator, respectively, implying that they may intersect with each other as time evolves,
Lingyu Liu, Xiaobo Li, Pengcheng Li
doaj +1 more source
A diffusive stage-structured model with a free boundary
Boundary Value Problems, 2018 In this paper we mainly consider a free boundary problem for a single-species model with stage structure in a radially symmetric setting. In our model, the individuals of a new or invasive species are classified as belonging either to the immature or to ...
Jingfu Zhao +2 more
doaj +1 more source
Asymptotic Profiles of Basic Reproduction Number for Epidemic Spreading in Heterogeneous Environment [PDF]
SIAM Journal on Applied Mathematics, 2020 The effect of diffusion rates on the basic reproduction number of a general compartmental reaction-diffusion epidemic model in a heterogeneous environment is considered. It is shown when the diffusion rates tend to zero, the limit of the basic reproduction number is the maximum value of the local reproduction number on the spatial domain.
Shanshan Chen, Junping Shi
openaire +3 more sources
Stability Analysis of a Rumor-Spreading Model with Two Time Delays and Saturation Effect
MathematicsTime delay and nonlinear incidence functions have a significant effect on rumor-spreading. In this article, a rumor-spreading model with two unequal time delays and a saturation effect is proposed.
Chunfeng Wei +4 more
doaj +1 more source
A ripple-spreading genetic algorithm for the aircraft sequencing problem [PDF]
, 2011 When genetic algorithms (GAs) are applied to combinatorial problems, permutation representations are usually adopted. Asa result, suchGAsare often confronted with feasibility and memory-efficiency problems.
Di Paolo, Ezequiel A. +3 more
core +1 more source
上海师范大学学报. 自然科学版We consider the asymptotic behavior of solutions to the porous medium equation with a positive bistable type reaction term and Dirichlet boundary condition. We first prove a convergence result.
LI Fang +3 more
doaj +1 more source
Asymptotic Behavior of Solutions of Free Boundary Problem with Logistic Reaction Term
Journal of Applied Mathematics, 2014 We study a free boundary problem for a reaction diffusion equation modeling the spreading of a biological or chemical species. In this model, the free boundary represents the spreading front of the species.
Jingjing Cai
doaj +1 more source
Dynamics of a delayed rumor spreading model with discontinuous threshold control
Heliyon, 2022 In this paper, we studied a delayed rumor spreading model with discontinuous threshold control. First, we studied the existence of equilibria of the subsystem.
Chunru Li, Zujun Ma, Yuanyuan Wang
doaj +1 more source
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