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数值色散    
相关语句
  numerical dispersion
    Numerical Dispersion Analysis of the PML Absorbing Boundary Condition Based Finite Difference Time Domain Method
    PML吸收边界的时域有限差分法的数值色散研究
短句来源
    Analysis on Numerical Dispersion of Two-Dimensional ADI-FDTD
    关于二维ADI-FDTD方法的数值色散分析
短句来源
    Analysis of the Numerical Dispersion of Higher Order ADI-FDTD
    高阶ADI-FDTD算法的数值色散分析
短句来源
    Analysis on Numerical Dispersion of One-dimensional ADI-FDTD Method
    一维ADI-FDTD方法的数值色散分析
短句来源
    Numerical analysis results indicate that the numerical dispersion errors are also the key factor determining the time step in the US-FDTD method as in the ADI-FDTD method.
    数值分析表明,与ADI-FDTD方法一样,数值色散误差仍然是决定US-FDTD时间步长选取的关键因素。
短句来源
  numerical dispersion
    Numerical Dispersion Analysis of the PML Absorbing Boundary Condition Based Finite Difference Time Domain Method
    PML吸收边界的时域有限差分法的数值色散研究
短句来源
    Analysis on Numerical Dispersion of Two-Dimensional ADI-FDTD
    关于二维ADI-FDTD方法的数值色散分析
短句来源
    Analysis of the Numerical Dispersion of Higher Order ADI-FDTD
    高阶ADI-FDTD算法的数值色散分析
短句来源
    Analysis on Numerical Dispersion of One-dimensional ADI-FDTD Method
    一维ADI-FDTD方法的数值色散分析
短句来源
    Numerical analysis results indicate that the numerical dispersion errors are also the key factor determining the time step in the US-FDTD method as in the ADI-FDTD method.
    数值分析表明,与ADI-FDTD方法一样,数值色散误差仍然是决定US-FDTD时间步长选取的关键因素。
短句来源
  numerical dispersion
    Numerical Dispersion Analysis of the PML Absorbing Boundary Condition Based Finite Difference Time Domain Method
    PML吸收边界的时域有限差分法的数值色散研究
短句来源
    Analysis on Numerical Dispersion of Two-Dimensional ADI-FDTD
    关于二维ADI-FDTD方法的数值色散分析
短句来源
    Analysis of the Numerical Dispersion of Higher Order ADI-FDTD
    高阶ADI-FDTD算法的数值色散分析
短句来源
    Analysis on Numerical Dispersion of One-dimensional ADI-FDTD Method
    一维ADI-FDTD方法的数值色散分析
短句来源
    Numerical analysis results indicate that the numerical dispersion errors are also the key factor determining the time step in the US-FDTD method as in the ADI-FDTD method.
    数值分析表明,与ADI-FDTD方法一样,数值色散误差仍然是决定US-FDTD时间步长选取的关键因素。
短句来源
  numerical dispersion
    Numerical Dispersion Analysis of the PML Absorbing Boundary Condition Based Finite Difference Time Domain Method
    PML吸收边界的时域有限差分法的数值色散研究
短句来源
    Analysis on Numerical Dispersion of Two-Dimensional ADI-FDTD
    关于二维ADI-FDTD方法的数值色散分析
短句来源
    Analysis of the Numerical Dispersion of Higher Order ADI-FDTD
    高阶ADI-FDTD算法的数值色散分析
短句来源
    Analysis on Numerical Dispersion of One-dimensional ADI-FDTD Method
    一维ADI-FDTD方法的数值色散分析
短句来源
    Numerical analysis results indicate that the numerical dispersion errors are also the key factor determining the time step in the US-FDTD method as in the ADI-FDTD method.
    数值分析表明,与ADI-FDTD方法一样,数值色散误差仍然是决定US-FDTD时间步长选取的关键因素。
短句来源

 

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  numerical dispersion
Genetic algorithm in reduction of numerical dispersion of 3-D ADI-FDTD method
      
A new method to reduce the numerical dispersion of the three-dimensional Alternating Direction Implicit Finite-Difference Time-Domain (3-D ADI-FDTD) method is proposed.
      
Firstly, the numerical formulations of the 3-D ADI-FDTD method are modified with the artificial anisotropy, and the new numerical dispersion relation is derived.
      
In addition the reduction of the numerical dispersion is investigated as the objective function of the AGA.
      
This paper presents the calculation of truncation errors, namely numerical diffusion and numerical dispersion for various finite difference schemes.
      
更多          
  numerical dispersion
Genetic algorithm in reduction of numerical dispersion of 3-D ADI-FDTD method
      
A new method to reduce the numerical dispersion of the three-dimensional Alternating Direction Implicit Finite-Difference Time-Domain (3-D ADI-FDTD) method is proposed.
      
Firstly, the numerical formulations of the 3-D ADI-FDTD method are modified with the artificial anisotropy, and the new numerical dispersion relation is derived.
      
In addition the reduction of the numerical dispersion is investigated as the objective function of the AGA.
      
This paper presents the calculation of truncation errors, namely numerical diffusion and numerical dispersion for various finite difference schemes.
      
更多          
  numerical dispersion
Genetic algorithm in reduction of numerical dispersion of 3-D ADI-FDTD method
      
A new method to reduce the numerical dispersion of the three-dimensional Alternating Direction Implicit Finite-Difference Time-Domain (3-D ADI-FDTD) method is proposed.
      
Firstly, the numerical formulations of the 3-D ADI-FDTD method are modified with the artificial anisotropy, and the new numerical dispersion relation is derived.
      
In addition the reduction of the numerical dispersion is investigated as the objective function of the AGA.
      
This paper presents the calculation of truncation errors, namely numerical diffusion and numerical dispersion for various finite difference schemes.
      
更多          
  numerical dispersion
Genetic algorithm in reduction of numerical dispersion of 3-D ADI-FDTD method
      
A new method to reduce the numerical dispersion of the three-dimensional Alternating Direction Implicit Finite-Difference Time-Domain (3-D ADI-FDTD) method is proposed.
      
Firstly, the numerical formulations of the 3-D ADI-FDTD method are modified with the artificial anisotropy, and the new numerical dispersion relation is derived.
      
In addition the reduction of the numerical dispersion is investigated as the objective function of the AGA.
      
This paper presents the calculation of truncation errors, namely numerical diffusion and numerical dispersion for various finite difference schemes.
      
更多          
  其他


In order to get accurate description of the scatterer surfaces in FDTD algorithm,and to lessen FDTD numetical dispersion and reduce the computation gild numbers so as to save the computer resource,a multiple-zone meshing method is proposed.The availability of this meshing method has been demonstrated by comparing the numerical results and experimental data of the current on a triangular cylinder.At the same time,in Cartesian coordinate system we have investigated the precision of contour Path meshing technique...

In order to get accurate description of the scatterer surfaces in FDTD algorithm,and to lessen FDTD numetical dispersion and reduce the computation gild numbers so as to save the computer resource,a multiple-zone meshing method is proposed.The availability of this meshing method has been demonstrated by comparing the numerical results and experimental data of the current on a triangular cylinder.At the same time,in Cartesian coordinate system we have investigated the precision of contour Path meshing technique in FDTD algorithm and extend this technique to studying the scattering problems of conducting targets coated with absorbing materials. From Maxwell's equations in integral form we deduce iterative equations of the fields on the grids near the surfaces of scatterer as the thickness Of coating lossy material is very small.The numerical results for RCS of conducting targets coated or partially coated with absorbing materials are presented.

在FDTD方法中为了精确拟合散射体曲面边界,本文提出了分区域剖分方法,以便提高计算精度,减少网格数目,节省计算机资源和降低FDTD数值色散,金属三角形柱表面电流的计算与实验结果的比较,验证了此方法的有效性。在直角坐标系下,研究了FDTD法CP剖分技术的计算精度,将CP剖分技术推广应用于涂敷金属目标的散射问题,由Maxwell方程的积分形式推导出了在涂敷吸波介质厚度很薄的情况下,散射体表面附近网格上场量迭代方程,给出了二维涂敷和部分涂敷金属目标RCS计算结果。

The foundational principle of the nonorthogonal PD-TD algorithm is introduced, and its stability condition and dispersion equation are derived. The numerical dispersion characteristics of this method are analyzed in detail. In order to show its validity the scattering surface currents of perfectly conducting cylinder are calculated by using this method when the incident wave is sinusoidal plane wave in TM case. The numerical results agree with that by moment method very well. Then the TM scattering problem of...

The foundational principle of the nonorthogonal PD-TD algorithm is introduced, and its stability condition and dispersion equation are derived. The numerical dispersion characteristics of this method are analyzed in detail. In order to show its validity the scattering surface currents of perfectly conducting cylinder are calculated by using this method when the incident wave is sinusoidal plane wave in TM case. The numerical results agree with that by moment method very well. Then the TM scattering problem of polygon cylinder coated with absorbing material is studied and the monostatic RCS of the target is obtained. For comparison with results of equivalent source method the electric scattering distribution pattern of square cylinder coated with absorbing material is also obtained by using nonorthogonal FD-TD.

本文全面介绍了非正交FD-TD方法的基本原理,推导出了其稳定条件和数值色散方程,并对其数值色散特性进行了详细分析研究。用非正交FD-TD方法在正弦波激励下对无限长三角形导体柱TM散射电流进行了计算,与矩量法(MM)结果基本吻合,证明了其有效性。在此基础上对涂敷多边形导体柱的TM散射问题进行了计算,得出远区单站RCS结果,同时为了比较给出了分别用非正交FD-TD法和等效源法计算涂敷方形导体柱的散射场分布的结果。

Perfectly matched layer PML absorbing boundary condition (ABC) and its excellent absorbing abilities and effects.have attented widely.In this paper we analysis the numerical dispersion of the PML absorbing boundary condition based finite difference time domain FDTD method.The PML absorbing boundary condition doesnt affect the electromagnetic waves numerical wave dispersion while effectively reducing the reflection of electromagnetic waves at absorbing boundary.

PML 吸收边界以其优异的吸收能力与效果而倍受人们的关注。本文针对运用 PML 吸收边界的时域有限差分法的数值色散问题进行了研究 ,并得到了较为满意的结果 ,PML吸收边界在有效减少电磁波在边界上的反射的情况下 ,并没有带来对数值色散的不良影响

 
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