Results 81 to 90 of about 33,542 (293)
Positive periodic solutions of delayed Nicholson's blowflies model with a linear harvesting term
Electronic Journal of Qualitative Theory of Differential Equations, 2011 This paper is concerned with a class of Nicholson's blowflies model with a linear harvesting term. By applying the method of coincidence degree, some criteria are established for the existence and uniqueness of positive periodic solutions of the model.
Mingquan Yang, Fei Long
doaj +1 more source
Advanced Engineering Materials, EarlyView.It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti +11 more
wiley +1 more source
Existence of positive solutions in the superlinear case via coincidence degree: the Neumann and the periodic boundary value problems [PDF]
, 2015 Guglielmo Feltrin, Fabio Zanolin
openalex +2 more sources
Electronic Journal of Differential Equations, 2014 In this article, we discuss the existence of solutions to boundary-value problems for a coupled system of fractional differential equations with p-Laplacian operator at resonance. We prove the existence of solutions when $\dim \ker L\geq 2$, using the
Lingling Cheng, Wenbin Liu, Qingqing Ye
doaj
Periodic solutions for Nicholson-type delay system with nonlinear density-dependent mortality terms
Electronic Journal of Qualitative Theory of Differential Equations, 2013 This paper is concerned with the periodic solutions for a class of new Nicholson-type delay system with nonlinear density-dependent mortality terms. By using coincidence degree theory, some criteria are obtained to guarantee the existence of positive ...
Zhibin Chen
doaj +1 more source
Advanced Engineering Materials, EarlyView.Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar +2 more
wiley +1 more source
Periodic solutions for p-Laplacian functional differential equations with two deviating arguments
Electronic Journal of Differential Equations, 2011 Using the theory of coincidence degree, we prove the existence of periodic solutions for the p-Laplacian functional differential equations with deviating arguments.
Changxiu Song, Xuejun Gao
doaj
Advanced Engineering Materials, EarlyView.Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth +6 more
wiley +1 more source
A Topology Optimization Framework for the Inverse Design of Nonlinear Mechanical Metamaterials
Advanced Engineering Materials, EarlyView.This work uses topology optimization to design unit cells for mechanical metamaterials with a prescribed nonlinear stress–strain response. The framework adds contact and postbuckling modeling to synthesize microstructures for three highly nonlinear responses, including pseudoductile behavior, monostable with snap‐through buckling, and bistable ...
Charlie Aveline +2 more
wiley +1 more source
Electronic Journal of Differential Equations, 2011 Using Mawhin's continuation theorem of coincidence degree theory, we establish the existence of $2^{n+m}$ positive periodic solutions for a non-autonomous Lotka-Volterra network-like predator-prey system with harvesting terms. Here n and m denote the
Kaihong Zhao, Yongkun Li
doaj