兰州大学机构库

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时间分数阶扩散波方程的三类反问题研究 学位论文
理学博士, 兰州: 兰州大学, 2020
Authors:  廖开方
Favorite  |    Submit date:2021/12/06
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  
求解无约束优化问题和非线性方程组的几种有效算法 学位论文
理学博士, 兰州: 兰州大学, 2021
Authors:  李群
Favorite  |    Submit date:2023/11/15
无约束优化  Unconstrained optimization  非线性方程组  Nonlinear equations  信赖域方法  Trust region method  自适应三次正则化方法  Adaptive cubic regularization method  Barzila-Borwein梯度法  Barzilai-Borwein gradient method  修正的Levenberg-Marquardt 方法  Modifed Levenberg-Marquardt method  无导数投影算法  Derivative-free projection algorithm  局部误差界条件  Local error bound conditions  全局收敛性  Global convergence  
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.  
几类绝对值方程和非线性互补问题的迭代求解 学位论文
理学博士, 兰州: 兰州大学, 2023
Authors:  张佳霖
Favorite  |    Submit date:2023/11/15
绝对值方程  Absolute value equation  非线性互补问题  nonlinear complementarity problem  张量绝对值方程  tensor absolute value equation  迭代方法  iterative method  收敛性  convergence  
Optimal parameterization of COVID-19 epidemic models 期刊论文
Atmospheric and Oceanic Science Letters, 2021, 卷号: 14, 期号: 4
Authors:  Zhang, Li;  Huang, Jianping;  Yu, Haipeng;  Liu, Xiaoyue;  Wei, Yun;  Lian, Xinbo;  Liu, Chuwei;  Jing, Zhikun
Favorite  |    Submit date:2021/08/12
COVID-19  Statistical method  Levenberg-Marquardt algorithm  SIR model  
张量特征对的估计及相关算法 学位论文
理学博士, 兰州: 兰州大学, 2020
Authors:  赵瑞娟
Favorite  |    Submit date:2021/12/06
非负张量  对称张量  不可约张量  弱对称张量  -谱半径  -特征对  广 义特征对  归一化牛顿方法  谱残差方法  修正的Levenberg-Marquardt方法  二次收敛 性  三次收敛性  
Seasonal fluctuations and temperature dependence in photosynthetic parameters and stomatal conductance at the leaf scale of Populus euphratica Oliv. 期刊论文
TREE PHYSIOLOGY, 2011, 卷号: 31, 期号: 2, 页码: 178-195
Authors:  Zhu, GF(朱高峰);  Li, X;  Su, YH;  Lu, L(鲁蕾);  Huang, CL;  Su, YH (reprint author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Donggang W Rd 320, Lanzhou 730000, Gansu, Peoples R China.
Adobe PDF(1276Kb)  |  Favorite  |    Submit date:2015/12/18
Bayesian statistics  Farquhar et al  model  maximum electron transport rate (J(max))  maximum rate of Rubisco carboxylation (V(cmax))  photosynthesis  stomatal conductance  transpiration  Populus euphratica Oliv  
Prediction of Fungicidal Activities of Rice Blast Disease Based on Least-Squares Support Vector Machines and Project Pursuit Regression 期刊论文
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2008, 卷号: 56, 期号: 22
Authors:  Du, HY;  Wang, J;  Hu, ZD(胡之德);  Yao, XJ(姚小军);  Zhang, XY(张晓昀);  Hu, ZD (reprint author), Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China.
Adobe PDF(670Kb)  |  Favorite  |    Submit date:2014/12/05
Quantitative Structure-activity Relationship (Qsar)  Fungicidal Activity  Genetic Algorithm (Ga)  Projection Pursuit Regression (Ppr)  Least-squares Support Vector Machine (Ls-svm)  
A hybrid forecasting approach applied to wind speed time series 期刊论文
RENEWABLE ENERGY, 2013, 卷号: 60, 页码: 185-194
Authors:  Hu, JM;  Wang, JZ;  Zeng, GW;  Hu, JM (reprint author), Lanzhou Univ, Sch Math & Stat, Lanzhou 730000, Peoples R China.
Adobe PDF(2301Kb)  |  Favorite  |    Submit date:2015/12/16
Wind farm  Wind speed forecasting  Ensemble Empirical Mode Decomposition (EEMD)  Support Vector Machine (SVM)