Results 41 to 50 of about 1,778 (134)

Aperiodic Clustered and Periodic Hexagonal Vegetation Spot Arrays Explained by Inhomogeneous Environments and Climate Trends in Arid Ecosystems

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract Due to climate change, overgrazing, and deforestation, arid ecosystems are vulnerable to desertification and land degradation. As aridity increases, vegetation cover loses spatial homogeneity and self‐organizes into heterogeneous vegetation patterns, a step before a catastrophic shift to bare soil.
David Pinto‐Ramos, Marcel Gabriel Clerc, Abdelkader Makhoute, Mustapha Tlidi   +3 more
wiley   +1 more source

Existence of entire solutions for non-local delayed lattice differential equations

Electronic Journal of Differential Equations, 2013
In this article we study entire solutions for a non-local delayed lattice differential equation with monostable nonlinearity. First, based on a concavity assumption of the birth function, we establish a comparison theorem.
Shi-Liang Wu, San-Yang Liu
doaj  

Quantum interference and sub-Poissonian statistics for time-modulated driven dissipative nonlinear oscillator

, 2010
We show that quantum-interference phenomena can be realized for the dissipative nonlinear systems exhibiting hysteresis-cycle behavior and quantum chaos.
A. R. Shahinyan, D. J. Wineland, E. Babourine-Brooks, G. Yu. Kryuchkyan, G. Yu. Kryuchkyan, I. C. Percival, T. V. Gevorgyan   +6 more
core   +1 more source

Utilizing Causal Network Markers to Identify Tipping Points ahead of Critical Transition

Advanced Science, Volume 12, Issue 42, November 13, 2025.
The study proposes a causal network markers (CNMs) framework to identify early‐warning signals preceding critical transitions. It validates CNMs on various computational benchmark models and real‐world datasets, demonstrating higher accuracy and flexibility compared to existing approaches.
Shirui Bian, Zezhou Wang, Siyang Leng, Wei Lin, Jifan Shi   +4 more
wiley   +1 more source

Traveling fronts and entire solutions in partially degenerate reaction-diffusion systems with monostable nonlinearity

Discrete & Continuous Dynamical Systems - A, 2013
This paper is concerned with traveling fronts and entire solutions for a class of monostable partially degenerate reaction-diffusion systems. It is known that the system admits traveling wave solutions. In this paper, we first prove the monotonicity and uniqueness of the traveling wave solutions, and the existence of spatially independent ...
Shi-Liang Wu, Yu-Juan Sun, San-Yang Liu
openaire   +1 more source

QRS Detection in Noisy Electrocardiogram Based on Multi‐Parameter Constrained Stochastic Resonance

IEEJ Transactions on Electrical and Electronic Engineering, Volume 20, Issue 11, Page 1745-1756, November 2025.
One major challenge of QRS wave detection is the deleterious impact of inevitable noise in electrocardiogram (ECG) signals, which can deteriorate the detection performance of algorithms. Previous research has shown a nonlinear monostable potential‐based algorithm for enhancing the QRS complex in a noisy environment. Its main mechanism is the stochastic
Wenyu Shang, Masaki Sekino
wiley   +1 more source

Travelling waves for a non-monotone bistable equation with delay: existence and oscillations

, 2017
We consider a bistable ($0\textless{}\theta\textless{}1$ being the three constant steady states) delayed reaction diffusion equation, which serves as a model in population dynamics. The problem does not admit any comparison principle.
Alfaro, Alfaro, Alfaro, Arnaud Ducrot, Berestycki, Berestycki, Berestycki, Chen, Ducrot, Ducrot, Fang, Fang, Fang, Gilbarg, Gomez, Gourley, Griette, Hale, Hasik, Li, Liang, Lin, Ma, Ma, Mallet-Paret, Mallet-Paret, Mallet-Paret, Matthieu Alfaro, Nadin, Nicholson, Nicholson, Schaaf, Smith, So, Thieme, Thomas Giletti, Trofimchuk, Wang, Wang, Yu, Yu   +40 more
core   +3 more sources

Machine Learning‐Driven Grayscale Digital Light Processing for Mechanically Robust 3D‐Printed Gradient Materials

Advanced Materials, Volume 37, Issue 42, October 23, 2025.
A machine learning‐driven grayscale digital light processing (g‐DLP) platform integrates optimization of gradient structures and photocurable resin materials with extensive tunability. The optimized gradient structure, fabricated from developed polyurethane acrylates with enhanced damping and customizable stiffness, reduces stress concentration ...
Jisoo Nam, Boxin Chen, Miso Kim
wiley   +1 more source

Multi‐Physically Programmable Tubular Origami Metamaterials: Exploitable Nexus of Geometry, Folding Mechanics and Stimuli‐Responsive Physics

Advanced Science, Volume 12, Issue 36, September 25, 2025.
This article presents an insightful review on the exploitable nexus of geometry, folding mechanics and stimuli‐responsive physics for achieving active programmability in tubular origami metamaterials and metastructures, highlighting the broad‐spectrum potential in innovative applications across the length scales, along with critically analysing the ...
A. Sharma, S. Naskar, T. Mukhopadhyay
wiley   +1 more source

3D Hyperbolic Kirigami Metamaterials With Tunable Auxeticity and Multistability

Advanced Science, Volume 12, Issue 35, September 18, 2025.
This study proposes a hyperbolic tessellation‐based structure that integrates TPMSs (Triply Periodic Minimal Surfaces, including SP: Schwarz Primitive, SD: Schwarz Diamond, and GY: Gyroid) with rotating rigid polygons, which enables 3D scalable deformation. The structure exhibits auxeticity and multistability, with a maximum volume expansion rate of up
Yu Lei, Yan Wang, Ruizhi Cui, Xiaolong Huang, Lei Zhang, Yuan Jin, Jinling Gao, Biwei Deng   +7 more
wiley   +1 more source