Results 71 to 80 of about 3,355 (214)

Multiobjective design optimization of a quadrupole resonator under uncertainties

Physical Review Accelerators and Beams, 2022
For a precise determination of the rf properties of superconducting materials, a calorimetric measurement is carried out with the aid of a so-called quadrupole resonator (QPR).
Piotr Putek, Shahnam Gorgi Zadeh, Marc Wenskat, Ursula van Rienen   +3 more
doaj   +1 more source

Invariant Measure and Universality of the 2D Yang–Mills Langevin Dynamic

Communications on Pure and Applied Mathematics, Volume 79, Issue 8, Page 1973-2102, August 2026.
ABSTRACT We prove that the Yang–Mills (YM) measure for the trivial principal bundle over the two‐dimensional torus, with any connected, compact structure group, is invariant for the associated renormalised Langevin dynamic. Our argument relies on a combination of regularity structures, lattice gauge‐fixing and Bourgain's method for invariant measures ...
Ilya Chevyrev, Hao Shen
wiley   +1 more source

Interval Uncertainty Analysis for Wheel–Rail Contact Load Identification Based on First-Order Polynomial Chaos Expansion

Mathematics
Traditional methods for identifying wheel–rail contact loads are based on deterministic models, in which the uncertainties such as material inhomogeneity and geometric tolerance are not considered. For wheel–rail contact load analysis with uncertainties,
Shengwen Yin, Haotian Xiao, Lei Cao
doaj   +1 more source

Non-intrusive uncertainty quantification in structural-acoustic systems using polynomial chaos expansion method

MATEC Web of Conferences, 2017
A framework of non-intrusive polynomial chaos expansion method (PC) was proposed to investigate the statistic characteristics of the response of structural-acoustic system containing random uncertainty.
Wang Mingjie, Huang Qibai, Li Shande, Li Lin, Zhang Zhifu   +4 more
doaj   +1 more source

Sensitivity Analysis of an Implanted Antenna within Surrounding Biological Environment

Energies, 2020
The paper describes the sensitivity analysis of a wireless power transfer link involving an implanted antenna within the surrounding biological environment. The approach combines a 3D electromagnetic modeling and a surrogate model (based polynomial chaos
Shuoliang Ding, Lionel Pichon
doaj   +1 more source

An Integrated Lumped Parameter Model and Computational Fluid Dynamics Framework for Predicting Hemodynamic Parameters in Pulmonary Vein Stenosis

Comprehensive Physiology, Volume 16, Issue 3, June 2026.
This work presents a novel computational simulation framework for the study of pulmonary venous hemodynamics that integrates a closed‐loop lumped parameter model (LPM) of the cardiovascular system with a computational fluid dynamics (CFD) model of the pulmonary veins and left atrium. Coupling of the LPM and CFD models was accomplished through surrogate
Alessia Di Nardo, David A. Romero, Rachel D. Vanderlaan, Cristina H. Amon   +3 more
wiley   +1 more source

STOCHASTIC STRUCTURAL MODAL ANALYSIS INVOLVING UNCERTAIN PARAMETERS USING GENERALIZED POLYNOMIAL CHAOS EXPANSION

, 2011
In this paper, the application of generalized polynomial chaos expansion in stochastic structural modal analysis including uncertain parameters is investigated. We review the theory of polynomial chaos and relating error analysis.
K. SEPAHVAND, H.-J. HARDTKE, S. MARBURG
core   +1 more source

Reliability-Based Robust Design Optimization Using Data-Driven Polynomial Chaos Expansion

Machines
As the complexity of modern engineering systems continues to increase, traditional reliability analysis methods still face challenges regarding computational efficiency and reliability in scenarios where the distribution information of random variables ...
Zhaowang Li, Zhaozhan Li, Jufang Jia, Xiangdong He   +3 more
doaj   +1 more source

Exact Solutions and Nonlinear Dynamical Behavior in a Navier‐Stokes‐Type Model for Elastic Cylindrical Vessels: An Analytical and Computational Approach

Engineering Reports, Volume 8, Issue 6, June 2026.
This study investigates a nonlinear Navier‐Stokes‐type model for elastic cylindrical vessels. Exact solutions are derived via the Bäcklund transformation and the ϕ6$$ {\phi}^6 $$‐expansion method, and dynamical behaviors are analyzed using bifurcation and chaos tools, revealing diverse wave structures and parameter‐dependent propagation characteristics.
Sheikh Zain Majid, Fatma Nur Kaya Sağlam, Mohammad Safi Ullah   +2 more
wiley   +1 more source

General polynomial chaos‐based expansion finite‐difference time‐domain method for analysing electromagnetic wave propagation in random dispersive media

IET Microwaves, Antennas & Propagation, 2021
A new approach for using polynomial chaos‐based expansion finite‐difference time‐domain (PCE‐FDTD) is presented to calculate the uncertainty of electromagnetic wave propagation in dispersive materials.
Jiangfan Liu, Huiping Li, Xiaoli Xi
doaj   +1 more source