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numerical dispersion
    NUMERICAL STABILITY AND NUMERICAL DISPERSION OF CONFORMAL MAPPING FDTD ALGORITHM
    保角变换FDTD算法的数值稳定性与数值色散
    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
    Numerical Dispersion of Higher-Order FDTD (2,4) and Applications to Microstrip Antenna
    FDTD(2,4)算法的数值色散特性及其在微带天线中的应用研究
    Analysis on Numerical Dispersion of Two-Dimensional ADI-FDTD
    关于二维ADI-FDTD方法的数值色散分析
    Analysis of numerical dispersion properties of MRTD and higher-order FDTD schemes
    MRTD和高阶FDTD算法的数值色散特性的分析
    Analysis of the Numerical Dispersion of Higher Order ADI-FDTD
    高阶ADI-FDTD算法的数值色散分析
    Analysis on Numerical Dispersion of One-dimensional ADI-FDTD Method
    一维ADI-FDTD方法的数值色散分析
    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。
    Numerical Dispersion of Nonorthogonal FDTD Algorithm in 2-D Obliquely Cartesian Coordinates
    二维非正交坐标系下FDTD方法的数值色散特性
    The Stability and Numerical Dispersion of Symplectic Scheme
    辛算法的稳定性及数值色散性分析
    Numerical dispersion characteristic and impedance relationship of three dimensional perfectly matched layers (PML) are analyzed under finite difference approximation in this paper, respectively, which show that numerical dispersion relationship of PML is different from that of the FDTD equations and the impedance of homogeneous PML medium is the same as that of free space.
    本文分别分析了有限差分近似下三维理想匹配层的数值色散特性和阻抗关系,分析表明,理想匹配层的数值色散关系有别于时域有限差分方程的数值色散关系; 有限差分近似下,均匀理想匹配层媒质的阻抗和自由空间的阻抗相同。
    The breakthroughs of this dissertation are as follows:1、The careful study shows that the conventional error measures used to evaluate the performance of the FDTD method's numerical dispersion is deficient.
    1、针对现存的用来衡量FDTD数值色散特性的误差定义进行了分析,指出了其中的不足,并提出了新的误差定义。
    Another effective method to reduce the numerical dispersion error is to use the higher-order FDTD methods.
    减少数值色散误差的另外一个有效的方法是采用高阶FDTD算法。 高阶算法具有低的色散特性,在满足同样精度的情况下可以使用比传统FDTD方法更粗的网格单元。
    s method. Thedifference equations, the stability condition, numerical dispersion characteristic andabsorbing boundary condition 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、吸收边界条件等。
    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。
    It has to satisfy two physical intrinsic and limitations: numerical dispersion and stability.
    需满足两个固有的物理限制:数值稳定性和数值色散性。
    of the sampled fields . The numerical experiment shows that adopting the method can approach the limitation of the Nyquist's sampling theorem and possesses a better numerical dispersion in addition that it can attain the same calculating as the FDTD's provided to use much fewer nets for simulating the electromagnetic structures.
    数值实验显示该方法可接近于Nyquist采样定理极限,具备更为优秀的数值色散性质,可用比FDTD少得多的网格数来模拟电磁结构,从而达到与FDTD相同的计算精度。
    The results show that there are non-conditional time stability and excellent numerical dispersion in the method.
    证明了其非条件的时间稳定特性,并数值模拟了无界,有界边界条件下的二维算例,论证了该方法的非条件时间稳定性和优秀的数值色散性。
    In this paper, first, the finite-difference time-domain Yee's method is introduced. The difference equations, the stability condition, numerical dispersion characteristic and absorbing boundary condition are discussed.
    本文首先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、吸收边界条件等。
    In the third chapter, various problems in FDTD is introduced including Yee grid, difference expressions, source excitation, boundary condition, numerical dispersion and numerical stability.
    第三章中介绍了传统时域有限差(FDTD)分中的各种问题,包括网格划分、差分格式、激励源设置、边界条件、数值色散和数值稳定性。
 

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