Krylov-space-based quasi-newton preconditioner for full-wavefield inversionA method, including: storing, in a computer memory, seismic data acquired from a seismic survey of a subsurface region; and generating, with a computer, a final subsurface physical property model of the subsurface region by ...
CUDA architecture was introduced by Nvidia three years ago and since then there have been many promising publications demonstrating a huge potential of Graphics Processing Units (GPUs) in scientific computations. In this paper, we investigate the performance of iterative methods such as cg, minres, ...
Parameters --- A : array_like An m × m array. b : array_like Initial vector (length m). n : int One less than the dimension of the Krylov subspace, or equivalently the *degree* of the Krylov space. Must be >= 1. Returns --- Q : numpy.array An m x (n + 1) array, whe...
Martin H. Gutknecht Block Krylov Space Solvers: a Survey Systems with multiple RHSs (cont’d) If iterative methods are applied, it is hard to solve (1)–(2) much faster than s systems with single RHS. Two approaches: • using the (iterative) solution of a seed system for solving ...
(34) comprising a krylov space expander (36) for carrying out a krylov space expansion of the exponent of a square root operator, the operator being for defining a wave propagation between respective layers, and a corrector (38), for using said corrections with said initial locations to form...
大型稀疏矩阵 CFD Krylov子空间法 预处理技术 Large Sparse Matrix CFD Krylov sub-space method Preconditioning 收藏 引用 批量引用 报错 分享 全部来源 求助全文 kns.cnki.net 相似文献 参考文献Krylov子空间法在SIMPLER算法中的求解性能分析 本文开发了Krylov子空间法中的Bi-CGSTAB、GMRES(m)、CGS、TFQMR及QMR...
3D acoustic wave propagation in homogeneous isotropic media using PETSc and Krylov space method demofdtdwaveacousticpropagationtime-domain3dpetsckrylov UpdatedOct 29, 2017 C Python reference implementation of the Newton propagator for quantum dynamics ...
演算法是一種子空間法 (spbspace method).在每次 JD 迭代,我們會利用 Rayleigh-Ritz procedure 從一個給定的 search space 去提取近似 Ritz-pair.如果近似的 Ritz-pair 不夠好,我們便需要透過解一個線性系統 correction equation 去增加一個基底向量... 魏子豪,ZH Wei - 國立中央大學圖書館 被引量: 0发表: ...
机载雷达KRYLOV子空间STAP算法研究br/..研究信号与信息的处理为主体,包含信息获取、变换、存储、传输、交换、应用等环节中的信号与信息的处理,是信息科学的重要组成部分,其主要理论和方法已广泛应用于信息科学的各个领域。本学科与电子科学与技术、计算机科学与技术、控制科学与工程、仪器科学与技术、电气工程、生物医学...
In view of time-stepping applications, assuming that the given matrix is scaled by a time step, it is shown that the bound is asymptotically correct (with an order related to the dimension of the Krylov space) for the time step tending to zero. This means that the deviation of the error...