Results 71 to 80 of about 3,408 (247)

Adjoint Variable Method Unleashed: A Journey into Rapid Inverse Design Strategies [PDF]

This paper explores the transformative role of the Adjoint Variable Method (AVM) in rapid inverse design strategies, particularly in the context of metasurfaces.
Swillam, Mohamed A.
core   +1 more source

On analysis error covariances in variational data assimilation [PDF]

, 2008
The problem of variational data assimilation for a nonlinear evolution model is formulated as an optimal control problem to find the initial condition function (analysis).
Shutyaev, V., Gejadze, Igor, Gejadze, I.Y., Shutyaev, Victor P., Le Dimet, François-Xavier, Le-Dimet, F.   +5 more
core   +1 more source

Sound wave neural network based on partial differential equation

地球与行星物理论评
Applications of neural network algorithms in rock physics have developed rapidly developed, mainly due to the neural network's powerful abilities in data modeling, signal processing, and image recognition.
Weitao Sun, Zhifang Yang, Xinfei Yan
doaj   +1 more source

A Mixed Discontinuous Galerkin Approximation of Time Dependent Convection Diffusion Optimal Control Problem

Journal of Mathematics, 2017
In this paper, we investigate a mixed discontinuous Galerkin approximation of time dependent convection diffusion optimal control problem with control constraints based on the combination of a mixed finite element method for the elliptic part and a ...
Qingjin Xu, Zhaojie Zhou
doaj   +1 more source

Shape optimization analysis considering a rotational body in a flow field based on the adjoint variable and the finite element methods

Journal of Fluid Science and Technology, 2019
In this study, we present a shape optimization analysis considering a rotational body in a flow field based on the adjoint variable and the finite element methods.
Takahiko KURAHASHI, Yuta OZEKI, Eiji KATAMINE   +2 more
doaj   +1 more source

Linear Toroidal‐Inertial Waves on A Differentially Rotating Sphere with Application to Helioseismology: Modeling, Forward and Inverse Problems

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This paper develops a mathematical framework for interpreting observations of solar inertial waves in an idealized setting. Under the assumption of purely toroidal linear waves on the sphere, the stream function of the flow satisfies a fourth‐order scalar equation.
Tram Thi Ngoc Nguyen, Damien Fournier, Laurent Gizon, Thorsten Hohage   +3 more
wiley   +1 more source

Comparison of Unsteady Aerodynamic Modelling Methodologies with Respect to Flight Loads Analysis [PDF]

, 2005
This paper addresses the development of aircraft models for flight loads analysis in the pre-design stage. The underlying model structure consists of the nonlinear equations of motion of a free flying, flexible aircraft, as well as a model, which ...
Kier, Thiemo, Thiemo Kier
core   +1 more source

Heat flux identification using reduced model and the adjoint method. Application to a brake disk rotating at variable velocity [PDF]

, 2016
International audienceIn previous works [1], reduced models have been used for solving inverse problems, characterized by a complex geometry requiring a large number of nodes and / or an objective of online identification.
Joly, F, Carmona, S., Rouizi, Yassine, Quéméner, O   +3 more
core   +3 more sources

A Differential Game with Random Time Horizon and Discontinuous Distribution

Mathematics, 2020
One class of differential games with random duration is considered. It is assumed that the duration of the game is a random variable with values from a given finite interval.
Anastasiia Zaremba, Ekaterina Gromova, Anna Tur   +2 more
doaj   +1 more source

Multiecho Fat‐Water Spiral MR Elastography With Distributed Encoding for Simultaneously Imaging Brain and Skull Displacement

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To introduce a novel multiecho, multishot spiral MR elastography (MRE) sequence to image brain and skull displacement simultaneously using a joint fat‐water image reconstruction and distributed motion encoding. Methods Multiple echo times were implemented into a high‐resolution multishot spiral MRE sequence to capture water‐based brain
Alexa M. Diano, Alex M. Cerjanic, Olivia M. Bailey, Mary K. Kramer, Joy Mojumder, Ruth J. Okamoto, Philip V. Bayly, Dzung L. Pham, Curtis L. Johnson   +8 more
wiley   +1 more source