Non linear conjugate gradient
Solving linear equations with messenger-field and conjugate gradient techniques: An application to CMB data analysis
... CMB data analysis commonly involves solutions of large, structured linear systems of equations. Two typical and important examples of such systems are map-making and Wiener-Filter systems of equations (see, e.g., ...
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A cooperative conjugate gradient method for linear systems permitting efficient multi-thread implementation
... block conjugate gradient (BCG) methods, first proposed as sequential algorithms by O’Leary and Brezinski, for the solution of the linear system Ax = b, for an n-dimensional symmetric positive ...
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A Conjugate Gradient Algorithm for Blind Sensor Calibration in Sparse Recovery
... Bretagne Atlantique, 35042 Rennes Cedex, France ABSTRACT This work studies the problem of blind sensor calibration (BSC) in linear inverse problems, such as compressive sens- ing. It aims to estimate the unknown ...
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Efficient spectral computation of the stationary states of rotating Bose-Einstein condensates by the preconditioned nonlinear conjugate gradient method
... nonlinear conjugate gradient method coupled with a spectral spatial dis- cretization scheme for computing the ground states (GS) of rotating Bose-Einstein condensates (BEC), modeled by the Gross-Pitaevskii ...
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A backward/forward recovery approach for the preconditioned conjugate gradient method
... Using (14) as tolerance parameter guarantees no false positives (a computa- tion without any error that is considered as faulty), but allows false negatives (an iteration during which an error occurs without being ...
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A conjugate gradient like method for p-norm minimization in functional spaces
... intrinsic non-linearity of the duality maps, we mention that, differ- ing from original CG method in Hilbert spaces, the short term recursion formula for computing the descent functionals (which have the same role ...
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Task-based Conjugate Gradient: from multi-GPU towards heterogeneous architectures
... sparse linear systems of equations of the form Ax = b, where A is a sparse ...on non compute intensive kernels with irregular memory access pattern, Sparse Matrix Vector products (SpMV) and level-one BLAS, ...
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Nonnegative 3-way tensor factorization via conjugate gradient with globally optimal stepsize
... 2. PROBLEM STATEMENT A tensor is an object defined on a product between linear spaces. Once the bases of these spaces are fixed, a third order tensor can be represented by a three-way array (or a hypermatrix). The ...
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Task-based Conjugate-Gradient for multi-GPUs platforms
... dense linear algebra [4, 5, 6, 17, 19, 33, 40, 42] and is now a common utility for related state-of-the-art libraries such as PLASMA [2], MAGMA [1] and FLAME ...Dense linear algebra algorithms were indeed ...
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Conjugate gradient algorithms for minor subspace analysis
... the gradient approach, applied to the minimization of an appropriate cost ...the conjugate gradient technique, initially introduced for solv- ing linear systems [6, ...preconditioned ...
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The Truncated Conjugate Gradient (TCG), a Non-iterative/Fixed-cost Strategy for Computing Polarization in Molecular Dynamics: Fast Evaluation of Analytical Forces
... Introduction Polarizable force fields simulations using point dipoles models are not slow anymore. Indeed, in recent years, the computational cost of the explicit evaluation of the many-body polar- ization energy and ...
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Non-linear electro-elastic coupling in non-centrosymmetric materials
... various linear and non-linear coefficients, especially in non centrosymmetric ...the non-linear tensors can be strongly ...
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GRADIENT REMEDIABILITY IN LINEAR DISTRIBUTED PARABOLIC SYSTEMS ANALYSIS, APPROXIMATIONS AND SIMULATIONS
... of exact and weak gradient remadiability. We show how to find an input operator (actuators) with respect to the output (gradient observation) that ensures the gradient remediability of a disturbed ...
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Hardening/softening behaviour in non-linear oscillations of structural systems using non-linear normal modes
... define non-linear normal modes. Keeping an oscillator form at linear stage (which is realized with two-dimensional real non- diagonal blocks in the linear part of the dynamics) allows ...
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Semi-linear diffusive representations for non-linear fractional differential systems
... the non-linear fractional di erential system d x = f ( x ) is governed by the global stability of the linearized system near the equilibrium d x = x , ...
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Conjugate gradient Mojette reconstruction
... L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ...
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Catalyst Acceleration for Gradient-Based Non-Convex Optimization
... 5 Applications to Existing Algorithms We now show how to accelerate existing algorithms M and compare the convergence guaranties before and after 4WD-Catalyst. In particular, we focus on the gradient descent ...
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Extension non-linéaire des méthodes FFT accélérées par gradient conjugué
... type gradient conjugué ne nécessitent toutefois pas de connaitre la matrice associée à ce système mais simplement de pouvoir évaluer la fonction en tout ...
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On Linear Frequency Domain Turbo-Equalization of Non Linear Volterra Channels
... to non linear distortions when being passed through a High Power Amplifier (HPA) operating near ...the non linear channel have been widely investigated [1], [2] and ...the non ...
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A linear stability study of the gradient zone of a solar pond
... and used a weak formulation of the governing equations and a Galerkin method expanded to the first order to obtain approximate solutions. They used trial functions similar to those used by Vero- nis 关11兴 for a binary ...
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