兰州大学机构库

Browse/Search Results:  1-10 of 11 Help

Selected(0)Clear Items/Page:    Sort:
A new nonstationary preconditioned iterative method for linear discrete ill-posed problems with application to image deblurring 期刊论文
NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS, 2020, 卷号: 28, 期号: 2
Authors:  Buccini, Alessandro;  Donatelli, Marco;  Reichel, Lothar;  Zhang, Wei-Hong
Adobe PDF(2149Kb)  |  Favorite  |    Submit date:2021/02/15
discrete ill‐  posed inverse problems  iterated Tikhonov method  spectral equivalence  
Recovering the source and initial value simultaneously in a parabolic equation 期刊论文
INVERSE PROBLEMS, 2014, 卷号: 30, 期号: 6, 页码: -
Authors:  Zheng, GH;  Wei, T(魏婷);  Zheng, GH (reprint author), Hunan Univ, Coll Math & Econometr, Changsha 410082, Hunan, Peoples R China.
Adobe PDF(1896Kb)  |  Favorite  |    Submit date:2015/12/16
variational regularization method  conjugate gradient method  discrepancy principle  source term  initial condition  conditional stability  convergence rates  
Simultaneous inversion of a fractional order and a space source term in an anomalous diffusion model 期刊论文
Journal of Inverse and Ill-Posed Problems, 2022, 卷号: 30, 期号: 6, 页码: 791-805
Authors:  Sun, Liangliang;  Yan, Xiongbin;  Liao, Kaifang
Favorite  |    Submit date:2022/11/08
Diffusion  Inverse problems  Iterative methods  Partial differential equations  Determination of fractional order  Fractional diffusion equation  Fractional order  Inverse source problem  Iterative Tikhonov regularization  Modified non-stationary iterative tikhonov regularization method  Nonstationary  Source terms  Tikhonov regularization method  Uniqueness  inverse source problem  fractional diffusion equation  uniqueness  modified non-stationary iterative Tikhonov regularization method  
几类时间分数阶扩散波方程反问题的唯一性及算法研究 学位论文
理学博士, 兰州: 兰州大学, 2021
Authors:  张云
Favorite  |    Submit date:2021/12/06
时间分数阶扩散波方程  反初值问题  反源项问题  分数阶阶数  零阶项系数  对流项系数  唯一性  Tikhonov正则化  迭代Tikhonov正则化方法  最速下降法  Nesterov策略  迭代正则化集合Kalman方法  交替方向乘子法  收敛性  
Simultaneous inversion of a time-dependent potential coefficient and a time source term in a time fractional diffusion-wave equation 期刊论文
CHAOS SOLITONS & FRACTALS, 2022, 卷号: 157
Authors:  Yan, Xiong-bin;  Zhang, ZQ(张正强);  Wei, T(魏婷)
Favorite  |    Submit date:2023/01/03
Nonlinear equations  Wave equations  Fixed point arithmetic  Iterative methods  Ill-posedness  Iterative Tikhonov regularization  Non-stationary iterative tikhonov regularization method  Nonlinear inverse problems  Nonstationary  Potential coefficient  Source terms  Stability and uniqueness  Tikhonov regularization method  Time-dependent potentials  
Simultaneous inversion of a time-dependent potential coefficient and a time source term in a time fractional diffusion-wave equation 期刊论文
CHAOS SOLITONS & FRACTALS, 2022, 卷号: 157
Authors:  Yan, Xiong-bin;  Zhang, ZQ(张正强);  Wei, T(魏婷)
Favorite  |    Submit date:2022/07/01
Inverse problems  Iterative methods  Nonlinear equations  Wave equations  Ill-posedness  Iterative Tikhonov regularization  Non-stationary iterative tikhonov regularization method  Nonlinear inverse problems  Nonstationary  Potential coefficient  Source terms  Stability and uniqueness  Tikhonov regularization method  Time-dependent potentials  Fixed point arithmetic  
分数阶扩散方程正问题和反问题的理论及数值方法研究 学位论文
理学博士, 兰州: 兰州大学, 2023
Authors:  姜素珍
Favorite  |    Submit date:2023/11/15
时间分数阶扩散方程  time fractional diffusion equation  $L1$ 方法  $L1$ scheme  $L2-1\sigma$方法  $L2-1\sigma$ scheme  分级网格  graded meshes  稳定性和收敛性  stability and convergence  唯一性  uniqueness  非定常迭代Tikhonov正则化方法  non-stationary iterative Tikhonov regularization method  Levenberg–Marquardt方法.  Levenberg-Marquardt method.  
基于域松弛非稳态迭代正则化方法求解时间分数阶扩散波方程空间源项辨识问题 学位论文
理学硕士, 兰州: 兰州大学, 2021
Authors:  冯正
Favorite  |    Submit date:2021/12/06
时间分数阶扩散波方程  反演空间源项  域松弛非稳态迭代Tikhonov正则化方法  不适定性  唯一性与非唯一性  
Simultaneous inversion of a time-dependent potential coefficient and a time source term in a time fractional diffusion-wave equation 期刊论文
CHAOS SOLITONS & FRACTALS, 2022, 卷号: 157
Authors:  Yan, Xiong-bin;  Zhang, Zheng-qiang;  Wei, Ting
Favorite  |    Submit date:2022/07/01
Nonlinear inverse problem  Stability and uniqueness  Ill-posedness  Non-stationary iterative Tikhonov regularization method  
Determine a Space-Dependent Source Term in a Time Fractional Diffusion-Wave Equation 期刊论文
Acta Applicandae Mathematicae, 2020, 卷号: 165, 期号: 1, 页码: 163-181
Authors:  Yan, X.B.;  Wei, T(魏婷)
Favorite  |    Submit date:2020/08/28
Inverse spatial source problem  Uniqueness  Non-stationary iterative Tikhonov regularization