兰州大学机构库

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A restrictive preconditioner for the system arising in half-quadratic regularized image restoration 期刊论文
Applied Mathematics Letters, 2021, 卷号: 115
Authors:  Zhao, Pei-Pei;  Huang, YM(黄玉梅)
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Conjugate gradient method  Linear systems  Matrix algebra  Newton-Raphson method  Numerical methods  Restoration  Ill conditioned problems  Image restoration problem  Numerical experiments  Preconditioned matrix  Regularization methods  Spectral properties  Structured systems  Symmetric positive definite  
Inner product free iterative solution and elimination methods for linear systems of a three-by-three block matrix form 期刊论文
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 2021, 卷号: 383
Authors:  Axelsson, Owe;  Liang, Zhao-Zheng;  Kruzik, Jakub;  Horak, David
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PDE-constrained optimization  Iterative solution  Preconditioning  Global communication  Inner product free  Parallel efficiency  
Scaled three-term derivative-free methods for solving large-scale nonlinear monotone equations 期刊论文
NUMERICAL ALGORITHMS, 2020
Authors:  Li, Qun;  Zheng, Bing
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Nonlinear monotone equations  Derivative-free method  Projection method  Global convergence  
Conjugate gradient method preconditioned with modified block SSOR iteration for multiplicative half-quadratic image restoration 期刊论文
CALCOLO, 2020, 卷号: 57, 期号: 3
Authors:  Zhao, Pei-Pei;  Huang, YM(黄玉梅)
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Image restoration  Multiplicative half-quadratic regularization  Newton method  Preconditioners  
Fast and High-Order Accuracy Numerical Methods for Time-Dependent Nonlocal Problems in R2 期刊论文
Journal of Scientific Computing, 2020, 卷号: 84, 期号: 1
Authors:  Cao, Rongjun;  Chen, Minghua;  Ng, Michael K.;  Wu, YJ(伍渝江)
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Conjugate gradient methodCoefficient matrix  Computational costs  High-order accuracy  Indefinite systems  Piecewise quadratic polynomials  Temporal and spatial  Temporal dimensions  Unconditionally stable  
Fast and High-Order Accuracy Numerical Methods for Time-Dependent Nonlocal Problems in R-2 期刊论文
JOURNAL OF SCIENTIFIC COMPUTING, 2020, 卷号: 84, 期号: 1
Authors:  Cao, Rongjun;  Chen, Minghua;  Ng, Michael K.;  Wu, YJ(伍渝江)
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Two-dimensional time-dependent nonlocal problems  Nonsymmetric indefinite systems  Rectangular matrices  Conjugate gradient squares method  Stability and convergence analysis  
时间分数阶扩散波方程的三类反问题研究 学位论文
, 兰州: 兰州大学, 2020
Authors:  廖开方
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反问题  时间分数阶扩散波方程  Levenberg-Marquardt方法  共轭梯度法  压缩映射原理  分数阶阶数  反源项问题  势项系数  唯一性  稳定性  Fréchet导数  Morozov偏差原理  
A Modified Conjugate Gradient Approach for Reliability-Based Design Optimization 期刊论文
, 2020, 卷号: 8
Authors:  Z. Wang;  Y. Zhang;  Y. Song
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Reliability-based design optimization  modified conjugate gradient approach  advanced mean value  performance measure approach  reliability analysis  
Identification of the time-dependent source term in a multi-term time-fractional diffusion equation 期刊论文
NUMERICAL ALGORITHMS, 2019, 卷号: 82, 期号: 4, 页码: 1279-1301
Authors:  Li, Y. S.;  Sun, L. L.;  Zhang, Z. Q.;  Wei, T(魏婷)
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Inverse source problem  Multi-term time-fractional diffusion equation  Conjugate gradient method  
On single-step HSS iterative method with circulant preconditioner for fractional diffusion equations 期刊论文
ADVANCES IN DIFFERENCE EQUATIONS, 2019, 卷号: 2019, 期号: 1
Authors:  Zhu, Mu-Zheng;  Zhang, GF(张国凤);  Qi, Ya-E
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Fractional diffusion equations  Circulant preconditioner  Toeplitz  Single-step Hermitian and skew-Hermitian splitting  Preconditioned conjugate gradient (PCG) method