Results 241 to 250 of about 402,202 (279)

A non‐iterative finite element method for inverse heat conduction problems

International Journal for Numerical Methods in Engineering, 2003
AbstractA non‐iterative, finite element‐based inverse method for estimating surface heat flux histories on thermally conducting bodies is developed. The technique, which accommodates both linear and non‐linear problems, and which sequentially minimizes the least squares error norm between corresponding sets of measured and computed temperatures, takes ...
Ling, Xianwu, Keanini, Russell G., Cherukuri, H. P.   +2 more
openaire   +1 more source

3D MT Anisotropic Inversion Based on Unstructured Finite-element Method

Journal of Environmental and Engineering Geophysics, 2021
The conventional 3D magnetotelluric (MT) forward modeling and inversions generally assume an isotropic earth model. However, wrong results can be obtained when using an isotropic model to interpret the data influenced by the anisotropy. To effectively model and recover the earth structures including anisotropy, we develop a 3D MT inversion framework ...
Xiaoyue Cao, Xin Huang, Changchun Yin, Liangjun Yan, Bo Zhang   +4 more
openaire   +1 more source

3-D resistivity inversion using the finite‐element method

GEOPHYSICS, 1994
With the increased availability of faster computers, it is now practical to employ numerical modeling techniques to invert resistivity data for 3-D structure. Full and approximate 3-D inversion methods using the finite‐element solution for the forward problem have been developed.
openaire   +1 more source

Time-Domain Finite Element Method for Inverse Problem of Aircraft Maneuvers

Journal of Guidance, Control, and Dynamics, 1997
Summary: A method for solving nonlinear inverse problems is proposed. The inverse problem is formulated as a general optimization problem with equality constraints that are functions of state variables. The optimality conditions are derived by a variational approach.
Lee, Suchang, Kim, Youdan
openaire   +1 more source

An Inverse Finite Element Method for Pure and Binary Solidification Problems

Journal of Computational Physics, 1997
An extension of the inverse finite element method (IFEM) developed by \textit{A. N. Alexandrou} [Int. J. Numer. Methods Eng. 28, No. 10, 2383-2396 (1989; Zbl 0716.73096)] is introduced. It allows the nodal temperature to change and employs a more general mesh updating procedure than in previous applications.
Fedoseyev, Alexandre I., Alexander, J. Iwan D.   +1 more
openaire   +2 more sources

Moore-penrose inverse method of topological variation of finite element systems

Computers & Structures, 1997
Abstract A topological modification method for structural variations of finite element system is studied in this paper. The Moore-Penrose (M-P) inverse theory and a new factorization of a stiffness matrix are used. A set of explicit formulations of variations are obtained.
Liang, Ping, Chen, Suhuan, Huang, Cheng
openaire   +2 more sources

Damage Localisation in Thin Plates Using the Inverse Finite Element Method

2019
This work investigates the use of the inverse Finite Element Method (iFEM) for damage localisation by reconstructing the damaged strain field of the structure. The iFEM is a proven technique for reconstructing the displacement field of a structure using surface strain measurements from discrete locations on the structure.
Roy R., Gherlone M., Surace C.
openaire   +1 more source

Automated procedure for InSAR data inversion using Finite Element Method

2008 Second Workshop on Use of Remote Sensing Techniques for Monitoring Volcanoes and Seismogenic Areas, 2008
Source inversions performed using different kind of static deformation data, such as GPS displacements, DInSAR imagery, levelling and EDM measurements, suggest that slip on fault is usually not uniform and is better modeled as a distribution of dislocation sources. To this aim, we developed an automated procedure for geodetic data inversion to estimate
Gilda Currenti, Ciro Del Negro, Danila Scandura, Charles A. Williams   +3 more
openaire   +1 more source

2D Laplace‐domain waveform inversion using adaptive finite element method

SEG Technical Program Expanded Abstracts 2009, 2009
Summary Waveform inversion in the Laplace domain has been proposed recently. The Laplace-domain waveform inversion is robust, is not sensitive to the initial model, and generates a long-wavelength velocity model for field data as it exploits a well behaved objective function.
Young Ho Cha, Changsoo Shin
openaire   +1 more source

Cross-borehole inverse scattering using a boundary finite-element method

Inverse Problems, 1998
Summary: The problem of the reconstruction of the shape of a perfectly conducting cylinder in a cross-borehole configuration is addressed. The initial data is the harmonic electromagnetic field diffracted by the object to a receiving borehole. The method is based on an iterative conjugate gradient algorithm which requires the solving of two reciprocal ...
Bonnard, S., Vincent, P., Saillard, M.
openaire   +2 more sources