查询词典 successive difference

The comparision between adaptive multiple grid method and successive overrelaxation method［J］.

欧阳洁。自适应多重网格法与超松弛法的比较［J］。

The elliptic electric potential equation is solved by Gauss-seidel iteration using a successive overrelaxation technique.

椭圆型电场方程采用控制容积积分方法离散，用Gauss-seidel迭代加超松弛方法求解。

By means of successive overrelaxation technique and under the assumption that throat radii are of non-uniform distribution, our computer simulation shows some new features of VF in fractal lattice.

模拟结果表明，分维D随着粘滞比M的增加而减少，对于大的M和较平坦的半径分布，驱替状态存在粘滞和毛细指进共存区。

The VF in percolation cluster, based on the assumption that throat radii are of Rayleigh distribution, is investigated by means of successive overrelaxation technique. The fractal dimension for VF in percolation cluster is calculated.

本文还构造了具有不同占据概率的逾渗集团，基于喉管半径为Rayleigh分布的假设，借助于逐次超松驰技术研究了逾渗集团中的粘滞指进问题，并计算了其分维值。

This paper improves the iterative format of the symmetric successive overrelaxation PCG method,as a result the computation is reduced by 8%～50%.This paper also presents some key subroutines for application of the SSOR PCG method to the solution of finite element equations.

本文改进了对称逐步超松驰预处理共轭梯度法的迭代格式，可节省计算量8％～50％，并给出应用SSORPCG法求解有限元方程组时的几个关键子程序。

Neumann, Successive overrelaxation methods for solving the rank deficient linear least squares problem, Linear Algebra Appl.

Miller and Neumann 提出SOR方法解决秩亏损线性最小二乘问题。

In this way, the demodulation arithmetic and pulse compression of multi-channels can be packed into a single FPGA.To compensate the nonlinear effect of power amplifier, a successive overrelaxation iterative method of digital predistortion is applied here to ensure the low sidelobe performance, high output power and fast iterative speed.

分析了功放非线性对超低副瓣脉冲压缩信号的影响，基于射频功率放大器、矢量信号发生仪和矢量信号分析仪，采用松弛迭代法实现并优化了功放数字预失真算法，提高了迭代收敛速度与稳定度。

D resistivity forward modeling ; Finite-element ; Secondary potential ; Symmetric successive overrelaxation ; Conjugate gradient.

电阻率三维正演；有限元；异常电位；对称超松弛；共轭梯度

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。

I had a lovely dog named PiPi, he was one of my best friends.

我曾经有过一只小狗，它的名字叫皮皮，它很善良，它是我最忠实的朋友。

Newly ovulated mouse oocytes were cultured in the CZB medium supplemented with different concentrations of pyruvate before treated for activation or assayed for MPF activity.

我们猜测卵母细胞在不含丙酮酸的条件下老化的更快，并且卵丘细胞可能通过消耗不含葡萄糖的CZB中的丙酮酸从而促进卵母细胞老化。