Results 31 to 40 of about 5,496,658 (160)
International Journal of Applied Mathematics and Computer Science, 2015 The Lanczos algorithm is among the most frequently used iterative techniques for computing a few dominant eigenvalues of a large sparse non-symmetric matrix.
Feuerriegel Stefan, Bücker H. Martin
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BFGS method based variable projection approach for image restoration
IET Image Processing, 2021 In this paper, a variable projection approach based on the BFGS (Broyden–Fletcher–Goldfarb–Shanno) method for image reconstruction problems is proposed, which is an alternative to the common alternating minimisation scheme.
Qiong‐Ying Chen +4 more
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The Lanczos algorithm with selective orthogonalization [PDF]
Mathematics of Computation, 1979 The simple Lanczos process is very effective for finding a few extreme eigenvalues of a large symmetric matrix along with the associated eigenvectors. Unfortunately, the process computes redundant copies of the outermost eigenvectors and has to be used with some skill.
Parlett, B. N., Scott, D. S.
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Restarting from Specific Points to Cure Breakdown in Lanczos-type Algorithms
Journal of Mathematical and Fundamental Sciences, 2015 Breakdown in Lanczos-type algorithms is a common phenomenon which is due to the non-existence of some orthogonal polynomials. It causes the solution process to halt.
Maharani, Abdellah Salhi
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Lanczos Algorithm, the Transfer Matrix, and the Signal-to-Noise Problem.
Physical Review LettersThis Letter introduces a method for determining the energy spectrum of lattice quantum chromodynamics by applying the Lanczos algorithm to the transfer matrix and using a bootstrap generalization of the Cullum-Willoughby method to filter out spurious ...
Michael L. Wagman
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Lanczos-Like Algorithm for the Time-Ordered Exponential: The *-Inverse Problem [PDF]
Applied Mathematics, 2019 The time-ordered exponential of a time-dependent matrix A(t) is defined as the function of A(t) that solves the first-order system of coupled linear differential equations with non-constant coefficients encoded in A(t). The authors have recently proposed
P. Giscard, S. Pozza
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A Fast Enhanced Secure Image Chaotic Cryptosystem Based on Hybrid Chaotic Magic Transform
Modelling and Simulation in Engineering, 2017 An enhanced secure image chaotic cryptosystem has been proposed based on hybrid CMT-Lanczos algorithm. We have achieved fast encryption and decryption along with privacy of images.
Srinivas Koppu, V. Madhu Viswanatham
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A Novel Symmetric Skew-Hamiltonian Isotropic Lanczos Algorithm for Spectral Conformal Parameterizations [PDF]
Journal of Scientific Computing, 2013 In the past decades, many methods for computing conformal mesh parameterizations have been developed in response to demand of numerous applications in the field of geometry processing. Spectral conformal parameterization (SCP) (Mullen et al.
Wei-Qiang Huang +3 more
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Evaluation of Eigenvalue Routines for Large Scale Applications
Shock and Vibration, 1994 The NASA structural analysis (NASTRAN∗) program is one of the most extensively used engineering applications software in the world. It contains a wealth of matrix operations and numerical solution techniques, and they were used to construct efficient ...
V.A. Tischler, V.B. Venkayya
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Efficient dielectric matrix calculations using the Lanczos algorithm for fast many-body $G_0W_0$ implementations [PDF]
, 2014 We present a $G_0W_0$ implementation that assesses the two major bottlenecks of traditional plane-waves implementations, the summations over conduction states and the inversion of the dielectric matrix, without introducing new approximations in the ...
J. L. Janssen, B. Rousseau, M. Côté
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