差分法

并讨论了电磁场问题的求解方法，常用的是有限差分法和有限元法。

It discusses the resolvents to the problem of electromagnetic field , and the mostly used resolvents are FDM and FEM .

采用有限差分法对新坐标系中的模型控制方程进行了数值离散，根据差分格式编制了相应的计算程序。

The FDM is applied to the numeric discreteness of control equations under the new coordinates and the corresponding programs are developed .

等价观测与GPS差分法定位

Equivalent observation and gps , differential positioning

对此，本文提出一种基于背景差分法的适合分级B帧的快速算法。

In this paper a fast algorithm suitable for the hierarchical B frames based on the background difference method is proposed .

RC网络模拟与有限差分法

R-C networks analogy and finite difference technique

其中时域有限差分法（FDTD）是求解麦克斯韦微分方程的直接时域方法。

FDTD is direct time domain method for solving Maxwell 's equations .

研究了一种测量激光等离子体发射软X光谱强度的新方法&滤波差分法。

The method of filter difference , which is used to measure X-ray spectrum radiated from laser produced plasma , are studied .

二维不可压Navier-Stokes方程的紧致有限差分法

Compact finite difference methods of two dimensional incompressible Navier Stokes equations

简单介绍了时域有限差分法（FDTD）的基本理论，并与其他几种数值方法进行了比较；

The basic theory of FDTD is introduced and compared with other numerical methods .

水平磁场台际转换函数Cu的大小&有限差分法模型计算研究

On the magnitude of the interstation transfer functions C_u of the horizontal magnetism field & A study on the numerical modeling of finite difference

基于MPI的电磁场时域有限差分法的网络并行研究

A Research on the Network Parallelization of FDTD with MPI

通过有限差分法求解了焊接熔池波动频率与焊接熔池半球体半径R之间关系的数值解。

Using the finite difference equation , the numerical solution of the relationship between the vibration frequency and radius R of hemispherical welding pool was solved .

应用时域有限差分法（FDTD）分析和计算了一种开口式同轴加热装置。

In this paper , an open coaxial heating device is analyzed and calculated by using FDTD .

有限差分法全波VSP模型

Modeling full-wave VSP record by finite difference method

针对上述问题，利用同轴波导模拟GIS腔体结构，并应用有限时域差分法对局部放电辐射的电磁波在波导内传播情况进行仿真。

To solve them , wave-guide cavity configuration is utilized and FDTD method is used to simulate transmission of PD ( partial discharge ) electromagnetic wave in wave-guide .

时域有限差分法（Finite-DifferenceTime-DomainMethod简称FDTDMethod）是广泛应用于电磁学问题的一种时域电磁场数值计算方法。

Finite Difference Time Domain Method ( FDTD ) is one of the most popular time domain methods in numerically solving electromagnetic problems . Firstly presented by K. S.

迄今，已有几种经典解法：FFT方法、有限差分法、有限元法等。

To date , there have been several classic solutions : FFT method , finite difference method , finite element method .

级数求和的差分法Cauchy定理的推广与一类级数求和问题

The Method of Difference in Summation of Series Generalization for Cauchy theorem and a problem on Sum of Series

从电磁波传播方程出发，基于时域有限差分法（FDTD）进行离散求解，获得了适合含水量测试的同轴电缆电磁波反射（TDR）系统的FDTD方程。

For the applications of TDR system in measuring water content , FDTD equations were obtained based on the propagation equations of electromagnetic wave .

本文主要研究了时域有限差分法（FDTD）的几种新技术以及矩量法在波导缝隙阵中的应用。

In this thesis , applications of several new algorithms of FDTD and MoM ( Method of Moment ) in waveguide slot antenna array are studied .

然后用时域有限差分法（FDTD）数值计算了锥形光纤光场分布，论述了在不同的包层半径处，光纤锥的光场分布特性。

Optical field in tapered optical fiber is numerically simulated using 2D finite-difference time-domain ( FDTD ) method , optical character in different cladding radius is expounded .

本文应用时域有限差分法（FDTD）分析了双极化口径耦合多层微带贴片天线。

A direct three dimensional finite difference time domain ( FDTD ) method is applied to the full wave analysis of dual polarization aperture coupled microstrip antenna .

对同一实例，比较了谱方法，差分法，假谱法24h，48h预报结果。

Comparative 24 h , 48 h forecasts of a real case are conducted for the spectral method , finite difference method and pseudo-spectral method .

采用电、磁场各分量均位于网格中心的高阶时域有限差分法计算PBG结构的色散特性。

In this paper , the dispersion relations of 2D-PBG structure are calculated , by using non-Yee grid high-order FDTD method .

最后，导出各能量泛函所对应的Euler-Lagrange方程，并利用有限差分法进行数值求解。

Finally , finite difference schemes are used to solve the Euler-Lagrange functions derived from above models .

本文用具有QUICK方案的有限差分法对底部加热的低Prandtl数水平流体层自然对流换热进行了数值计算，研究了这种问题中存在的振荡和分歧问题。

Bifurcation and oscillation were studied for the natural convection in a horizontal layer of low Prandtl number fluid using SIMPLE algorithm with a kind of QUICK scheme .

在均匀多导体传输线的时域有限差分法（FDTD）基础上，对非均匀多导体传输线及端接非线性负载的情况进行了分析。

Based on the uniform multi-conductor transmission lines ( MTL ), the FDTD method is adopted to research the transient response of the nonuniform transmission lines with nonlinear loads .

因此为了得到非线性方程组的解，提出了各种数值计算方法，其中，有限差分法（FD）和有限元（FE）是两类常用的方法。

Hence various numerical methods are presented for solving these ones . The finite difference ( FD ) method and finite element ( FE ) method are two kinds of usual methods .

采用时域有限差分法（FDTD）直接求解Maxwell方程组，分析了二维随机激光器中环形随机腔的构成、形成条件及光波模式特性等。

A finite-difference time-domain ( FDTD ) method is used to solve Maxwell 's equations directly . We have studied the structure , condition of formation and mode characteristic .

利用时域有限差分法（FDTD）一次运算就可得出三端口网络的S参数矩阵的各元素，而无需任何预处理，大大地节省了CPU时间。

No priori procedure is needed , and the S parameters of the three ports circuit are calculated from a single run of FDTD , which leads to a significant reduction in CPU time .