Search Results - "gradient based minimization algorithm"

Detection of Simulated Brain Strokes Using Microwave Tomography by Coli, Vanna Lisa, Tournier, Pierre-Henri, Dolean, Victorita, Kanfoud, Ibtissam El, Pichot, Christian, Migliaccio, Claire, Blanc-Feraud, Laure

“…Brain strokes are one of the leading causes of disability and mortality in adults in developed countries. Ischemic stroke (85% of total cases) and hemorrhagic…”
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Seismic tomography of the southern California crust based on spectral-element and adjoint methods by Tape, Carl, Liu, Qinya, Maggi, Alessia, Tromp, Jeroen

“…We iteratively improve a 3-D tomographic model of the southern California crust using numerical simulations of seismic wave propagation based on a…”
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Gradient-Based Algorithms With Intermediate Observations in Static and Differential Games by Hossain, Mohammad Safayet, Simaan, Marwan A., Qu, Zhihua

“…In two-player static and differential games, strategic players often use available or delayed information about the other player's decisions and solve an…”
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Ecosystem model optimization using in situ flux observations: benefit of Monte Carlo versus variational schemes and analyses of the year-to-year model performances by Santaren, D., Peylin, P., Bacour, C., Ciais, P., Longdoz, B.

“…Terrestrial ecosystem models can provide major insights into the responses of Earth's ecosystems to environmental changes and rising levels of atmospheric CO2…”
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Ocean acoustic tomography from different receiver geometries using the adjoint method by Zhao, Xiaofeng, Wang, Dongxiao

“… Based on the code tests of the tangent linear model, the adjoint model, and the gradient, the optimization problem is solved by a gradient-based minimization algorithm…”
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Plane-Wave Generation through General Near-Field In-Band Reflectarray Direct Layout Optimization with Figure of Merit Constraints in mm-Wave Band by Prado, Daniel R.

“…) and the use of a gradient-based minimization algorithm. To this end, the volume where the NF is computed is divided into a number of disjoint regions where the FoM are defined…”
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Parameter identification of nonlinear time-dependent rubber bushings models towards their integration in multibody simulations of a vehicle chassis by Puel, Guillaume, Bourgeteau, Béatrice, Aubry, Denis

“…Rubber bushings are extensively used linking parts in a vehicle chassis that allow to filter noise and vibration. They influence much, however, the transient…”
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Optimization of transmission spectra through periodic aperture arrays by Dobson, David C., Wadbro, Eddie

“… A level-set method combined with a filtering technique and a gradient-based minimization algorithm numerically solves the problem…”
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Comparison of two image reconstruction algorithms for microwave tomography by Fhager, A., Persson, M.

“… One is a general, gradient‐based minimization algorithm. The other is the chirp pulse microwave computed tomography (CP‐MCT…”
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ESTIMATION OF IN-PLANE ELASTIC PARAMETERS AND STIFFENER GEOMETRY OF STIFFENED PLATES by CHAKRABORTY, S., MUKHOPADHYAY, M.

“…”. The parameter estimation problem is solved using an iterative-gradient-based minimization algorithm and can start from different randomly selected set of initial parameters. The Levenberg…”
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GEOMETRIC OPTIMIZATION OF RADIATIVE ENCLOSURES THROUGH NONLINEAR PROGRAMMING by Daun, K. J., Howell, J. R., Morton, D. P.

“… The enclosure geometry is repeatedly adjusted with a gradient-based minimization algorithm until a near-optimum solution is found…”
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Geometric optimization of radiative enclosures through nonlinear programming by Daun, K J, Howell, J R, Morton, D P

“… The enclosure geometry is repeatedly adjusted with a gradient-based minimization algorithm until a near-optimum solution is found…”
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Damage and material identification using inverse analysis by Li, Li

“…In this thesis, we formulate novel solutions to two inverse problems using optical measurements as input data: i) local level damage identification of beams,…”
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A Multi-scale Three-Dimensional Variational Scheme Based on Diffusion Filter by Ziqiang Li, Xue Li, Xinrong Wu

“… in the gradient, the new scheme can incorporate scales into a gradient-based minimization algorithm and correct…”
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Improved analysis‐error covariance matrix for high‐dimensional variational inversions: application to source estimation using a 3D atmospheric transport model by Bousserez, N., Henze, D. K., Perkins, A., Bowman, K. W., Lee, M., Liu, J., Deng, F., Jones, D. B. A.

“…Variational methods are widely used to solve geophysical inverse problems. Although gradient‐based minimization algorithms are available for high…”
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Edge based finite element simulation of eddy current phenomenon and its application to defect characterization by Li, Yue

“…Edge based finite elements are finite elements whose degrees of freedom are assigned to edges of finite elements rather than nodes. Compared with conventional…”
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Sparse Reconstruction Using Hyperbolic Tangent as Smooth l1-Norm Approximation by Haider, Hassaan, Shah, Jawad Ali, Kadir, Kushsairy, Khan, Najeeb

“… However, l1 norm non-differentiable and gradient-based minimization algorithms are not applicable, due to this very reason there is a need to approximate l1 norm by its smooth approximation…”
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Hypersingular shape sensitivity boundary integral equation for crack identification under harmonic elastodynamic excitation by Rus, Guillermo, Gallego, Rafael

“… q BIE, and its use for the solution of the inverse problem when coupled to gradient-based minimization algorithms…”
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Numerical Modeling and High-Speed Parallel Computing: New Perspectives on Tomographic Microwave Imaging for Brain Stroke Detection and Monitoring by Tournier, Pierre-Henri, Bonazzoli, Marcella, Dolean, Victorita, Rapetti, Francesca, Hecht, Frederic, Nataf, Frederic, Aliferis, Iannis, El Kanfoud, Ibtissam, Migliaccio, Claire, de Buhan, Maya, Darbas, Marion, Semenov, Serguei, Pichot, Christian

“…This article deals with microwave tomography for brain stroke imaging using state-of-the-art numerical modeling and massively parallel computing. Iterative…”
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Developing a Geometric Deformable Model for Radar Shape Inversion by Yildirim, Alper, Yezzi, Anthony

“…In this paper, we develop a radar-based dense scene reconstruction model that extracts shape information embedded in the radar return signal. Our method uses a…”
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