Results 211 to 220 of about 30,452 (249)

Dual Variational Problems and Action Principles for Chen–Lee and Hopf–Langford Systems

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT We describe the construction of dual variational principles and action functionals for nonlinear dynamical systems using a methodology based on the dual Lagrange multiplier formalism and a convex optimization approach, to derive families of dual actions that correspond to the given nonlinear ordinary differential system.
A. Ghose‐Choudhury, Partha Guha
wiley   +1 more source

Algebraic method of group classification for semi-normalized classes of differential equations [PDF]

Célestin Kurujyibwami, Dmytro R. Popovych, Roman O. Popovych   +2 more
openalex   +1 more source

Asymptotic Analysis of the Static Bidomain Model for Pulsed Field Cardiac Ablation

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT Cardiac arrhythmias are caused by faulty electrical signals in the heart, which lead to chaotic wave propagation and impaired cardiac function. This work focuses on a non‐thermal ablation technique based on electroporation (EP), a promising method for treating arrhythmias, called pulsed field ablation (PFA).
Annabelle Collin, Simone Nati Poltri, Clair Poignard   +2 more
wiley   +1 more source

Models of Collisionless Quasineutral Solar Wind Current Sheets. [PDF]

Sol Phys
Boswell S, Neukirch T, Artemyev A, Vasko I, Allanson O.   +4 more
europepmc   +1 more source

Complex travelling wave solutions of fractional nonlinear coupled malaria model: bifurcation, chaos, and multistability. [PDF]

Sci Rep
Abdullah, Shakeel M, Muhammad S, Ahmadzai HG.   +3 more
europepmc   +1 more source

Launch Uncertainty Analysis Under Barrel Erosion Using Experiments and Random Matrix Theory

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The effects of barrel erosion on artillery firing performance have long been a subject of concern, but its effect on launch uncertainty has yet to be investigated. This article explores the influence of barrel erosion on the interior ballistic mechanical properties and launch disturbances.
Chengyuan Guo, Guolai Yang, Liqun Wang, Jianli Ge, Qingle Wu, Hao Guo   +5 more
wiley   +1 more source

Unveiling diverse solitons in the quintic perturbed Gerdjikov-Ivanov model via a modified extended mapping method. [PDF]

Sci Rep
Hussein HH, Ahmed HM, Kandil SA, Alexan W.   +3 more
europepmc   +1 more source

Ellipsoid‐Based Interval‐Type Uncertainty Model Updating Based on Riemannian Manifold and Gaussian Process Model

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Modern engineering systems require advanced uncertainty‐aware model updating methods that address parameter correlations beyond conventional interval analysis. This paper proposes a novel framework integrating Riemannian manifold theory with Gaussian Process Regression (GPR) for systems governed by Symmetric Positive‐Definite (SPD) matrix ...
Yanhe Tao, Qintao Guo, Jin Zhou, Cheng Yi   +3 more
wiley   +1 more source

Bifurcation analysis of small amplitude unidirectional waves for nonlinear Schrödinger equations with fractional derivatives. [PDF]

Sci Rep
Aderyani SR, Saadati R, Abolhassanifar MS, O'Regan D.   +3 more
europepmc   +1 more source

A Probabilistic Cut Finite Element Method With Random Field Generator and Bayesian Model Calibration for Flow Through Rough Cracks

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT A new model for the simulation of fluid flow through rough cracks is presented. The model combines a probabilistic cut finite element method (PCutFEM) to capture the unfitted boundary condition at the fluid interface, with a stochastic random field generator to represent the crack asperities.
Brubeck Lee Freeman, Evan John Ricketts, Diane Gardner, Anthony Jefferson, Peter John Cleall, Pierre Kerfriden   +5 more
wiley   +1 more source