推导了用于非均匀各向异性弹性波场正演的伪谱法基本公式。
The basic formula of pseudo spectral method are derived for simulating inhomogeneous anisotropic elastic waves field.
伪谱时域（PSTD）方法可以处理电大尺寸目标电磁散射问题。
The Pseudospectral time-domain (PSTD) algorithm can be used to solve the scattering of the electrically large objects.
本文利用傅里叶数值方法(即伪谱法)求解该方程来模拟各向异性介质中弹性议的传播。
Elastic wave propagation in anisotropic medium is simulated by solving the equation system with the aid 'of Fourier numerical method (pseudo-spectrum method).
伪谱法利用傅立叶变换和有限差分求解波动方程，是三维波场正演模拟的重要方法之一。
The pseudo-spectrum method uses Fourier transform and finite difference to solve wave equation. It is one of the important methods used to simulate the seismic wave field.
尽管如此，伪谱法计算速度快，计算效率高，能够直观、高效地反映介质中波场的传播规律。
Nevertheness, the pseudo-spectral method has a high computation speed and computational efficiency and can reflect the propagation rules of the wave field in medium visually and effectively.
本文给出三种求解轨道优化设计问题的方法（间接法、混合法和高斯伪谱方法）及求解思路。
Three kinds of trajectory optimization methods including Indirect method, Hybrid method and Gauss pseudospectral method, as well as solving thoughts were given in this paper.
但是伪谱法也存在一定的问题，由于折叠效应的影响，普通的吸收边界条件不能达到良好的效果。
Because of the influence for wraparound, ordinary absorb boundary condition can, however, not achieve ideal effect.
于是在复平面上，鲁棒稳定性问题就转化为伪谱横坐标（伪谱最右端的横坐标值）最小的优化问题。
Therefore, on the complex plane, robust stability can be formulated by minimization of pseudospectra abscissa.
针对多区域切比雪夫伪谱时域算法稳定性方面的问题，采用隐式和显式两种时间积分方式对此进行改善。
The implicit and explicit time integration schemes are used to improve the stability condition of the MCPSTD algorithm.
此外，在伪谱法中引入匹配层边界条件后，只需对空间做一维傅里叶变换，大大提高了伪谱法的计算效率。
With the matched layer boundary conditions being introduced, only the 1-D Fourier transform in space is needed for the PS method, greatly improving the computational efficiency.
此算法不仅具有多区域伪谱时域算法分析任意曲边形体问题的精确性和灵活性，而且稳定性和效率也相应地提高。
This algorithm not only maintains accuracy and flexibility of PSTD for an accurate treatment of arbitrarily curved objects, but also improves stability and efficiency.
MMLS具有广谱的抑菌作用和抗伪狂犬病毒作用。
We could conclude that MMLS broad antimicrobial spectrum and good inhibiting effects on PRV.
利用伪随机多频信号作为场源的多频相对相位谱观测法拥有相对相位观测法的优点，同时为异常源的区分提供丰富的信息。
PRMF relative phase spectrum IP method with PRMF signal as excitation has the same advantage of relative phase IP method, and offer rich information for the discrimination of anomaly source.
介绍了伪随机序列的基本知识以及该理论在扩谱雷达波形设计中的典型应用。
The basic idea of pseudo noise sequence and its typical application in radar signal designing were introduced in this paper.
多频激电相对相位谱法充分发挥了伪随机多频信号作为电法勘探场源的优点，可在找水，找矿等勘探中发挥重要作用。
PRMF relative phase spectrum IP show the advantage of PRMF signal as source of electrical exploration, can play important in groundwater exploration, mineral exploration, and so on.
当用计算机模拟满足一定功率谱规律的离散数字随机信号时，通常是对伪随机白噪声离散数字信号进行数字滤波来模拟。
When the random processes that meet certain power spectra are simulated by digital filters to white noise, the step length of the filters affects response mean-square values and correlation functions.
方法采用时-频域识别方法，根据TEOAE与刺激伪迹不同的短时谱特征来有效识别两者。
Methods Time-frequency domain method was used to effectively recognize TEOAEand stimulating artifact by their different short time Fourier transformation (STFT).
扩谱通信中一个最基本的任务就是实现本机的伪随机信号与接收的伪随机信号的同步。
In spread-spectrum communication systems, the essential task which has to be performed is the synchronization of receiver pseudonoise (PN) signal with the pseudonoise signal contained in the input.
达到高精度的关键是应用了伪随机码扩谱及差分定位技术。
Spread-spectrum PN code ranging and differential Positioning technology are used to make it possible to reach such accuracy.
达到高精度的关键是应用了伪随机码扩谱及差分定位技术。
Spread-spectrum PN code ranging and differential Positioning technology are used to make it possible to reach such accuracy.
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