spurious spectra

As a natural extension of the idea of spectra, pseudospectra is a new tool for nonnormal system.

作为谱的自然延伸,伪谱是一个针对非正规系统的新工具。

In this paper, we discussed eleven theorems involving e - pseudospectra that each generalize a familiar eigenvalue theorem.

该文讨论了6个包含ε-伪谱的定理,每个定理都是对熟悉的特征值定理的推广,这些定理在以前还没有用伪谱的语言叙述过。

In this paper,we provide two new methods to compute pseudospectra:exclusion regions and remotion p.

常用的格子SVD法在精确计算矩阵A的ε-伪谱Λ_ε(A)时,需要将感兴趣的区域作细网格划分,在每一个网格点处计算σ_(min)(zI-A),并根据该值的大小判断该网格点是否位于Λ_ε(A)伪谱曲线上,其计算量往往很大。

Using the pseudo-spectral method for wave field numerical modeling of complex heterogeneous medium;

复杂非均匀介质伪谱法波场数值模拟

Wavefield forward modeling with the pseudo-spectral method in viscoelastic and azimuthally anisotropic media;

各向异性黏弹性介质伪谱法波场模拟

In conventional pseudo-spectral method for solving the wave equation,the routine algorithm needs large quantities of computation and spends a long computing time.

伪谱法求解波动方程的常规算法,运算量大,运算时间长。

A numerical wave model is developed to simulate freak wave generation,which is based on the modified four-order nonlinear Schrdinger equation governing the slow variation of complex envelope in deep water and a standard split-step,pseudo-spectral method.

基于控制深水复波包演化的修正的四阶非线性薛定谔方程和离散时间步长的伪谱方法,建立了畸形波生成的数值模型,模拟了边带扰动初始条件下满足边带不稳定性条件时波列的演化,统计了演化过程中生成的畸形波,并对该过程中谱成分能量的变化进行了分析。

The Legendre pseudospectral algorithm is used to acquire an optimal trajectory to guide the subsatellite into a final position close to the spaceship under mission-related constraints.

应用Legendre伪谱算法,将连续时间最优控制问题离散化,进而利用非线性规划方法进行求解,通过数值模拟验证了方法的有效性。

The Pseudo Spectral Method (PSM), with which global spatial derivatives are computed by multiplication in Fourier domain, is a new numerical modeling method based on the elastic wave equation developed in recent years.

伪谱法是近年来发展较快、建立在弹性波动方程基础上的一种数值模拟方法。

The paper simulated the propagation of elastic wave in a medium with horizontal interface by pseudo spectral method (PSM).

本文用伪谱法模拟了弹性波在具有一个平直界面的介质——一部分是无裂缝岩石 ,另一部分是含有固定方向排列裂纹的这种岩石中的传播。

Numerical modeling of seismic wavefield in anisotropic viscoelastic porous medium with the pseudo-spectral method;

各向异性粘弹性孔隙介质地震波场伪谱法正演模拟

In this paper, a new heterogeneous anisotropic constitutive model of fractured media was presented, and the properties of elastic waves excited from a two-dimensional (2D) point source propagation in 2D fractured rocks were investigated by the pseudo-spectral method (PSM).

本文提出了一种新的非均匀各向异性随机裂缝介质本构模型，用伪谱法模拟了二维点源产生的弹性波在二维复杂岩石中的传播。