查询词典 measure of dispersion

The numerical results show the difference between transient signal and steady. In the end of this chapter, the FDTD formule in the magnetic dispersion medium is presented in order to compute the scattering problem in the dispersion medium.

第四章基于FDTD方法在时域直接研究目标的瞬态散射特性，采用标准的Yee算法和改进的FDTD方法，计算了有耗介质方柱和涂复圆柱的瞬态响应，数字结果显示了瞬态信号与稳态信号的差异。

For separable and continous exponential family models (such as normal, gamma, and inverse Gaussian models), this paper discusses the tests for departures from nominal dispersion in the framework of longitudinal nonlinear models with varying dispersion and/or random effects. The score test statistics are constructed and their asymptotic distributions and local powers are derived.

本文针对可分的连续型指数族回归模型（如正态模型，Γ模型，逆高斯模型），讨论广义非线性纵向数据模型中偏离名义离差的检验问题，得到了检验的score统计量，并推导了它们的渐近分布和局部近似功效。

Numerical dispersion characteristic and impedance relationship of three dimensional perfectly matched layers 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。

And we show that random walk model converges to the stable law of Lévy-Feller advection-dispersion equation by use of a properly scaled transition to vanish-ing space and time steps,We propose an explicit finite difference approximation for Lévy-Feller advection-dispersion equation.

第三章讨论描述服从某种稳定分布反常扩散的非对称空间分数阶对流-扩散方程——Lévy-Feller对流-扩散方程，首先利用Fourier变换和Laplace变换给出方程的基本解，然后利用Grünwald-Letnikov分数阶导数移位离散算子离散方程中的Riesz-Feller分数阶导数得到离散格式，证明此格式可以解释为离散随机游走模型，并且证明了当时间和空间步长以一定的比率同时趋于0时，所提出的离散随机游走模型收敛到Lévy-Feller对流-扩散过程的稳定分布。

To those who think I might be some sort of Dispersion groupie, let me just say that before I spent today in arenas, I had no idea what to think of Dispersion.

有些人认为我是那个"抵制消散团体"的，让我说这仅仅是我今天在竞技场打上一天之前。

Illustrations are used to analyze the limitation of line sampling firstly. For linear limit state, the efficiency of LS is affected by the dispersion of the actual important direction from the optimal one, the bigger the dispersion is, the lower the efficiency is. For non-linear limit state, in case that the actual important direction deviates from the optimal one greatly, the efficiency and the precision of LS decrease seriously, even wrong results are obtained.

首先通过算例分析线抽样方法存在的问题，对于线性问题，线抽样法的效率受抽样重要方向与最优重要方向偏离程度的影响，这种偏离程度越大，效率越低；而对于非线性问题，当抽样重要方向与最优重要方向偏离较大时，线抽样的效率和精度均严重下降，甚至得出错误的计算结果。

We use SEM to observe fractured morphology of composites, and TEM to observe dispersion and particle size of nanoparticles or composited nanoparticles in matrix. We also investigate dispersion property of composited nanoparticles in polymer matrix with the help of microtone.

采用扫描电镜观察缺口冲击的断裂形貌，通过透射电镜观察纳米粒子和复合纳米粒子的分散情况和粒径的大小；通过超薄切片法研究复合粒子在聚合物基体中的分散性。

The PCF is tailored by changing the radius of the second ring, in order to obtain larger normal dispersion for dispersion compensation.

在常规光子晶体光纤的基础上，变化了第二环的空气孔，增加了光子晶体光纤的结构参量变化的自由度。

The curves of abnormal dispersion in the absorption range and normal dispersion in the gain range are acquired.

二、采用激光经典理论中吸收系数与折射率的关系，结合钛宝石晶体光谱资料，研究了钛宝石的色散特性，获得了吸收区反常色散与增益区正常色散的色散曲线。

The result shows that, in the case of low power, it is important for the chirp to form the soliton and transmit in the abnormal and zero dispersion area, but it's bad for the pulse's transmission in normal dispersion.

结果表明，较低功率时，反常色散区和零色散区，初始啁啾对于孤子的快速形成和传输具有重要的作用，而位于正常色散区时，啁啾破坏了脉冲形状，不利于脉冲的传输。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？