Results 131 to 140 of about 1,441 (286)

Global attractivity and persistence in a discrete population model [PDF]

open access: yes, 2000
We study the attractivity properties of equilibrium points of the scalar delay difference equation xn+1-xn= -δxn+pf(xn-k) which arises in many contexts in the ecology.
Trofimchuk, S. I., Gyori, I.
core  

Asymptotically almost periodicity of delayed Nicholson-type system involving patch structure

open access: yesElectronic Journal of Differential Equations, 2020
In this article we study a delayed Nicholson-type system involving patch structure. We apply differential inequality techniques to establish a sufficient condition for the existence of positive asymptotically almost periodic solutions. By constructing
Chuangxia Huang   +2 more
doaj  

Periodic Oscillation of Fuzzy Cohen-Grossberg Neural Networks with Distributed Delay and Variable Coefficients

open access: yesJournal of Applied Mathematics, 2008
A class of fuzzy Cohen-Grossberg neural networks with distributed delay and variable coefficients is discussed. It is neither employing coincidence degree theory nor constructing Lyapunov functionals, instead, by applying matrix theory and inequality ...
Hongjun Xiang, Jinde Cao
doaj   +1 more source

Synthesis of AgBiS2 and AgInS2 Based on Formation Energies in Sulfur‐Rich Reducing Flame

open access: yesAdvanced Functional Materials, EarlyView.
High‐surface‐area AgInS2 and AgBiS2 nanoparticles were synthesized via enclosed flame spray pyrolysis by tuning flame conditions and formation energies to guide phase formation. Flame parameters were tuned to suppress oxides and enable pure sulfide phase growth.
Muhammad Ali Martuza   +7 more
wiley   +1 more source

Global Behavior of a Discrete Anticompetitive System in the Plane

open access: yesDiscrete Dynamics in Nature and Society, 2019
The main goal of this paper is to investigate the global asymptotic behavior of the difference system xn+1=γ1yn/A1+xn,  yn+1=β2xn/B2+yn,  n=0,1,2,…. with γ1,β2,A1,B2∈(0,∞) and the initial condition (x0,y0)∈[0,∞)×[0,∞).
Lin-Xia Hu
doaj   +1 more source

Bioinspired Hierarchically Interconnected Supermacroporous Hydrogels via Dual‐Templating for Rapid Atmospheric Water Harvesting

open access: yesAdvanced Functional Materials, EarlyView.
Inspired by lung alveolar architecture, a dual‐templating strategy combining CO2 bubble and ice templating creates mechanically robust super‐macroporous hydrogels with highly interconnected transport pathways. The resulting material achieves 3.37× faster moisture sorption and 1.72× higher solar‐driven water release than single‐templated counterparts ...
Pan Huang   +7 more
wiley   +1 more source

Stability and global attractivity of a generalized Lorenz system

open access: yes四川大学学报. 自然科学版
In this paper, global stability of the equilibrium point of a generalized Lorenz system is studied, sufficient and necessary conditions for the global exponential stability, the global asymptotic stability and the instability of the equilibrium point are
ZHU Chong-Han   +2 more
doaj  

Engineering of Crystallinity to Amplify Chiroptical Activity of TiO2 Nanohelices for Enhancing Dissymmetric Circularly Polarized Photocatalysis

open access: yesAdvanced Functional Materials, EarlyView.
Enhancing crystallinity through thermal annealing leads to amplifying the chiroptical activity of TiO2 nanohelices (NHs) fabricated by glancing angle deposition, ascribed to the suppression of charge trapping. The enhanced chiroptical activity can be converted into pronounced dissymmetric photocatalytic kinetics of circularly polarized photocatalysis ...
Ying Wang   +3 more
wiley   +1 more source

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