Results 31 to 40 of about 55,379 (247)
Ultrasound Probe Calibration Method of Single-Wire Phantom Using Levenberg-Marquardt Algorithm
Jurnal Nasional Teknik Elektro dan Teknologi Informasi, 2023 A freehand three-dimensional (3D) ultrasound system is a method of acquiring images using a 3D ultrasound probe or conventional two-dimensional (2D) ultrasound probe to give a 3D visualization of an object inside the body.
Tri Arief Sardjono +5 more
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Neural network training acceleration using NVIDIA CUDA technology for image recognition
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012 In this paper, an implementation of neural network trained by algorithm based on Levenberg-Marquardt method is presented. Training of neural network increased by almost 9 times using NVIDIA CUDA technology.
Alexander A Fertsev
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Inexact Levenberg-Marquardt method for nonlinear equations
Discrete & Continuous Dynamical Systems - B, 2004 The problem of solving a system of nonlinear equations \(F(x)=0\), where \(F:\mathbb{R}^m\to \mathbb{R}^n\) arises frequently from the discretisation of partial differential equations by finite differences, finite volumes, finite elements, boundary elements and other approximation methods.
Fan, Jinyan, Pan, Jianyu
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Sensors, 2021 The image stitching process is based on the alignment and composition of multiple images that represent parts of a 3D scene. The automatic construction of panoramas from multiple digital images is a technique of great importance, finding applications in ...
Maria Júlia R. Aguiar +4 more
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Non-linear carbon dioxide determination using infrared gas sensors and neural networks with Bayesian regularization [PDF]
, 2009 Carbon dioxide gas concentration determination using infrared gas sensors combined with Bayesian regularizing neural networks is presented in this work.
Almeida +27 more
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Efficient computation of capillary-gravity generalized solitary waves [PDF]
, 2016 This paper is devoted to the computation of capillary-gravity solitary waves of the irrotational incompressible Euler equations with free surface. The numerical study is a continuation of a previous work in several points: an alternative formulation of ...
Clamond, Didier +2 more
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Applied Sciences, 2019 Near-infrared spectroscopy (NIRS) including diffuse optical tomography is an imaging modality which makes use of diffuse light propagation in random media.
Yu Jiang +3 more
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Fractal and Fractional, 2022 A finite element scheme for solving a two-timescale Hadamard time-fractional equation is discussed. We prove the error estimate without assuming the smoothness of the solution. In order to invert the fractional order, a finite-element Levenberg–Marquardt
Shijing Cheng +3 more
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A Levenberg–Marquardt Method for Nonsmooth Regularized Least Squares
SIAM Journal on Scientific ComputingWe develop a Levenberg-Marquardt method for minimizing the sum of a smooth nonlinear least-squar es term $f(x) = \tfrac{1}{2} \|F(x)\|_2^2$ and a nonsmooth term $h$. Both $f$ and $h$ may be nonconvex. Steps are computed by minimizing the sum of a regularized linear least-squares model and a model of $h$ using a first-order method such as the proximal ...
Aleksandr Y. Aravkin +2 more
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Defect Analysis of the β– to γ–Ga2O3 Phase Transition
Advanced Functional Materials, EarlyView.The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas +9 more
wiley +1 more source