Results 41 to 50 of about 404,975 (273)
Alternating-Direction Line-Relaxation Methods on Multicomputers [PDF]
SIAM Journal on Scientific Computing, 1996 The authors develop an alternating direction line-relaxation method on multicomputers. Several microcomputer performances are implemented. Best results are obtained with a modified half Gauss-Seidel line-relaxation method. Computations are illustrated with numerical experiments.
Hofhaus, Jörn, Van de Velde, Eric F.
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Abstract and Applied Analysis, 2014 We consider the problem of seeking a symmetric positive semidefinite matrix in a closed convex set to approximate a given matrix. This problem may arise in several areas of numerical linear algebra or come from finance industry or statistics and thus has
Minghua Xu +3 more
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Results in Control and Optimization, 2021 The classic Alternating Direction Method of Multipliers (ADMM) is a popular framework to solve linear-equality constrained problems. In this paper, we extend the ADMM naturally to nonlinear equality-constrained problems, called neADMM.
Junxiang Wang, Liang Zhao
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, 2013 Transform Invariant Low-rank Textures (TILT) is a novel and powerful tool that can effectively rectify a rich class of low-rank textures in 3D scenes from 2D images despite significant deformation and corruption.
Lin, Zhouchen, Ren, Xiang
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An alternating direction method for total variation denoising [PDF]
Optimization Methods and Software, 2014 We consider the image denoising problem using total variation (TV) regularization. This problem can be computationally challenging to solve due to the non-differentiability and non-linearity of the regularization term. We propose an alternating direction augmented Lagrangian (ADAL) method, based on a new variable splitting approach that results in ...
Zhiwei (Tony) Qin +2 more
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pH‐mediated activation of the lysosomal arginine sensor SLC38A9
FEBS Letters, EarlyView.Cells monitor nutrient levels via the lysosomal transporter SLC38A9 to activate the mechanistic target of rapamycin complex 1 (mTORC1). This study reveals that SLC38A9 function is regulated by pH. We identified histidine 544 as a critical pH sensor that undergoes conformational changes to control amino acid efflux from lysosomes; therefore, it ...
Xuelang Mu, Ampon Sae Her, Tamir Gonen
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Self-Adaptive Alternating Direction Method of Multipliers for Image Denoising
Applied SciencesIn this study, we introduce a novel self-adaptive alternating direction method of multipliers tailored for image denoising. Our approach begins by formulating a collaborative regularization model that upholds structured sparsity within images while ...
Mingjie Xie, Haibing Guo
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FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
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An Alternating Direction Method for Mixed Gaussian Plus Impulse Noise Removal
Abstract and Applied Analysis, 2013 A combined total variation and high-order total variation model is proposed to restore blurred images corrupted by impulse noise or mixed Gaussian plus impulse noise. We attack the proposed scheme with an alternating direction method of multipliers (ADMM)
Si Wang +3 more
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, 2015 Nonconvex and structured optimization problems arise in many engineering applications that demand scalable and distributed solution methods. The study of the convergence properties of these methods is in general difficult due to the nonconvexity of the ...
Fischione, Carlo +3 more
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