数值色散 meaning in English
numerical di ersion
numerical dispersion
Examples
- Simulation research on numerical dispersion for modeling of wave guide devices by fdtd
法建模波导器件时数值色散的仿真研究 - First , we reviewed the finite - difference time - domain yee ' s method . the difference equations , the stability condition , numerical dispersion characteristics , absorbing boundary conditions , incident wave source conditions and the calculation of the frequency - dependent scattering parameters are discussed
首先本文回顾了时域有限差分yee算法，包括时域有限差分的差分方程、稳定性条件、数值色散特性、吸收边界条件，激励源的设置以及散射参数的计算等。 - By comparing the error of dispersion , it illustrates that the staggered uncolocated grid yee ' s scheme is the best one among 2 order schemes . using the same method for 2 order scheme , we analysis the high order fdtd schemes . the method for constructing good - performance high order fdtd schemes is points out , and a new 4 order scheme which is coincident for e and h is given out
然后，将该分析方法应用到高阶fdtd的研究中，指出了构造高阶差分格式的原则和方法，并提出了一种新的电磁对称的4阶fdtd方法，研究并给出了它和其他两种电磁不对称4阶fdtd的色散特性，结果表明高阶方法具有比2阶fdtd方法小的多的数值色散误差。 - In chapter three , after introduced the method of fdtd in electromagnetic computing , we study the dispersion of several 2 order fdtd methods deducing from the difference for space and time variables by fourier theory . result show that the dispersion deduced by space - difference can be modified by the time - difference
接着本文用傅立叶分析的方法研究了空间差分和时间差分格式以及二者联合时的数值色散误差特性，通过对几种2阶格式的研究和比较，指出了yee格式fdtd是2阶格式中的最佳fdtd方法。