查询词典 preconditioned

Firstly, the three-dimension boundary question and its corresponding variation question concerning the point-source electrical field on a 3-D structure are presented. Secondly, the finite element method is used to solve the variational equation. The study area is divided into many tetrahedral elements. Then, we interpolate with a tri-linear function in each element. So, the variational equation is converted into a linear equation system. Finally, taking into account saving of time, we make use of symmetric successive overrelaxation preconditioned conjugate gradient algorithm to solve large linear system, and obtain the potential value of each node, resulting in the calculation of the apparent resistivity values on the ground surface.

首先给出了三维构造中点源电场的边值问题以及相应的变分问题；然后利用有限单元法求解变分问题，采用四面体单元对研究区域进行剖分，在单元中进行三线性函数插值，将变分方程化为线性代数方程组；最后，考虑到节约计算时间，利用对称超松弛预条件共轭梯度迭代算法求解大型线性方程组，得到了各节点的电位值，进而计算出地表的视电阻率。

In this study, symmetric successive overrelaxation preconditioned conjugate gradient algorithm is used to solve large linear system derived from 3-D finite-element resistivity forward modeling. Using row-indexed sparse storage mode to store coefficient matrix, the algorithm converges much quickly and requires much less storage of computer.

引入对称超松弛预条件共轭梯度迭代算法求解电阻率三维有限元计算形成的大型线性方程组，并有机结合系数矩阵的稀疏存储模式，使得三维有限元正演计算的速度大大提高而内存需求则大大减少。

Based on it, a new efficient implementation of preconditioned conjugate gradient is put forward to solve the Gauss-Newton equation and save the cost on computation with the same exactly quadratic convergence to the traditional choleski factorization.

新算法与传统的使用Choleski技术的Gauss-Newton法具有相同的收敛速率，但在求解 Gauss-Newton方程组时减少了代数运算的计算量。

Allogene group: SD→Wistar, one group received AVH of cryopreservation, the other group received AVH preconditioned with dendritic cell monoclonal antibodiesdiluted by 1:5 and cryopreserved, and then was treated with DcmAb.

异基因组分别为接受低温保存的AVH移植和接受1：5稀释树突状细胞单抗预处理低温保存，AVH移植后给予DC单抗治疗，同基因组为对照组。

Methods An isovolumic Langendorff perfused rat heart model was used.After 30 minutes of equilibrating perfusion,the HSPT group(n=8) was preconditioned by 15 minutes of hyperthermic oxygenated cardioplegia at 42℃(Control,n=8,at 37℃),before 100 minutes of cold preservation,followed by 30 minutes of reperfusion.

Wistar大鼠16只，随机分为HSPT组（n=8）和对照组（n=8），建立Langendorff离体鼠心等容收缩模型；平衡灌流30分钟后，分别用42 ℃和37 ℃的含氧停搏液灌注15分钟，然后冷停搏100分钟，再灌30分钟。

Preconditioned grafts also exhibit sustained axonal regeneration at and past the lesional site in histologic analysis.

组织学分析显示预先处理的节段同样还表现出了持久的促进病灶轴性再生能力。

Reasoning is the property of the truth, which is preconditioned by spiritual freedom.

六、理性是真理的属性，而理性的前提则是精神自由。

By the use of different criteria for constructing preconditioners, we can get many different preconditioned systems.

根据不同的准则构造预条件矩阵，可以得到不同的预条件方程组。

Learning is often seen as preconditioned by motivation.

学习往往被视为预处理的动机。

The data must be preconditioned so that it can be used to forecast the performance trend of the aeroengine.

为了利用数据对发动机性能趋势进行预测，必须对数据进行预处理。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。