Results 81 to 90 of about 7,785,042 (211)

A discontinuous Galerkin moving mesh method for Hamilton-Jacobi equations [PDF]

, 2007
In this paper we consider the numerical solution of first-order Hamilton-Jacobi equations using the combination of a discontinuous Galerkin finite element method and an adaptive $r$-refinement (mesh movement) strategy.
MacKenzie, John, Nicola, Aurelian
core   +1 more source

Exploring Gas Evolution Oscillators: Mechanisms and Applications

ChemPhysChem, Volume 26, Issue 4, February 16, 2025.
Explore the rhythms of gas evolution oscillators, i. e. systems showing oscillatory delivery of gas sustained by simple reactions yielding gaseous products in a liquid mixture, due to nucleation and supersaturation phenomena. We delve into their mechanisms and their potential to control chemical processes, with a focus on sustainable energy ...
Marcello A. Budroni, Mauro Rustici, Federico Rossi   +2 more
wiley   +1 more source

On the oscillation of the solutions to linear difference equations with variable delay

Electronic Journal of Differential Equations, 2008
A new criterion for the oscillation of the solutions to linear difference equations with variable delay is established. This criterion is based on a new fundamental lemma, which provides a useful inequality for the nonoscillatory solutions of the ...
Christos G. Philos, Ioannis P. Stavroulakis, George E. Chatzarakis   +2 more
doaj  

Travelling solitons in the parametrically driven nonlinear Schroedinger equation

, 2000
We show that the parametrically driven nonlinear Schroedinger equation has wide classes of travelling soliton solutions, some of which are stable. For small driving strengths nonpropogating and moving solitons co-exist while strongly forced solitons can ...
A. Mecozzi, A.C. Scott, A.V. Ustinov, B. Denardo, C. Elphick, D.E. Pelinovsky, E. V. Zemlyanaya, G. Huang, H. Yamazaki, H.S.J. van der Zant, I. V. Barashenkov, I.H. Deutsch, I.V. Barashenkov, I.V. Barashenkov, I.V. Barashenkov, I.V. Barashenkov, I.V. Barashenkov, J.W. Miles, M. Bär, M. Umeki, M. Umeki, M.M. Bogdan, M.M. Bogdan, M.V. Tratnik, N.V. Alexeeva, O.M. Braun, P. Coullet, S. Longhi, S. Longhi, V.E. Zakharov, W. Wang, X. Wang, X. Wang, X. Wang, X. Wang, X. Wang, X.N. Chen, Yu.S. Kivshar   +37 more
core   +1 more source

An Eulerian formulation for the computational modeling of phase‐contrast MRI

Magnetic Resonance in Medicine, Volume 93, Issue 2, Page 828-841, February 2025.
Abstract Purpose Computational simulation of phase‐contrast MRI (PC‐MRI) is an attractive way to physically interpret properties and errors in MRI‐reconstructed flow velocity fields. Recent studies have developed PC‐MRI simulators that solve the Bloch equation, with the magnetization transport being modeled using a Lagrangian approach.
Tomohiro Otani, Tetsuro Sekine, Yu Sato, Ellen Cavalcante Alves, Shigeo Wada   +4 more
wiley   +1 more source

Some generalizations of Calabi compactness theorem [PDF]

, 2011
In this paper we obtain generalized Calabi-type compactness criteria for complete Riemannian manifolds that allow the presence of negative amounts of Ricci curvature.
Bianchini, Bruno, Mari, Luciano, Rigoli, Marco   +2 more
core   +1 more source

NONOSCILLATORY SOLUTIONS OF DELAY DIFFERENCE EQUATIONS WITH OSCILLATING COEFFICIENTS

Demonstratio Mathematica, 2003
Using the analogy with differential equations with deviated argument the authors study non-oscillatory solutions of the scalar equation \[ \Delta y_k = P^o_ky_k + \sum_1^nP^i_ky_{k-K^i_k} \] with bounded coefficients satisfying an oscillation condition.
Bolat, Yaşar, Akin, Ömer
openaire   +2 more sources

A Generalised Power Synchronisation Loop Design for Performance Enhancement of Grid‐Forming Converter

IET Smart Grid, Volume 8, Issue 1, January/December 2025.
A generalised power synchronisation loop (GPSL) is proposed to enable the adjustment of the inertia, the damping and stiffness characteristics of the GFM converter simultaneously. The flexibility and stability of GPSL in a single GFM converter system and multiple GFM converter system is analysed.
Yifeng Li, Wei Pei, Jiawang Xiong, Wei Deng   +3 more
wiley   +1 more source

Solvability of a Higher-Order Nonlinear Neutral Delay Difference Equation

Advances in Difference Equations, 2010
The existence of bounded nonoscillatory solutions of a higher-order nonlinear neutral delay difference equation , , where , , , and are integers, and are real sequences, , and is a mapping, is studied. Some sufficient conditions for the existence of
Liu Min, Guo Zhenyu
doaj  

Kamenev-Type Criteria for Testing the Asymptotic Behavior of Solutions of Third-Order Quasi-Linear Neutral Differential Equations

Mathematics
This paper aims to study the asymptotic properties of nonoscillatory solutions (eventually positive or negative) of a class of third-order canonical neutral differential equations.
Hail S. Alrashdi, Wedad Albalawi, Ali Muhib, Osama Moaaz, Elmetwally M. Elabbasy   +4 more
doaj   +1 more source