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LinearBPM
这是一个简单的FFT为无电位1 +1 +1 Ð 薛定谔方程的光束传播方法。如果该软件灵活,允许引入的术语(如果是极少数需要包括色散效应高阶导数)。例如,如果一个人渴望解决的一个方程的形式:
(四/ dz的+ Ð ^ 2/dx ^ 2 - 0.25 * Ð ^ 3/dx ^ 3)== 0 Ÿ
它可以解决使用以下代码:
Ž = linspace(0,1,512)
x = linspace(-5,5,1024)
psi0 =进出口(- x的。^ 2)
Ð = D_lateral1D(十,2)-0.25 * D_lateral1D(十,3)
字段= LinearBPM(psi0,有D,Z)
凡D_lateral1D是一个函数,提供“取代”的微分算子。
这个函数是在一个非线性的BPM,我曾对(分步,谱方法等),将提交给我,当我完成他们的文件和组织功能更复杂的设置非常初期阶段。
(This is a simple FFT based beam propagation method for potential-free 1+1+1D Schrodinger equation. The software if flexible and allows to introduce high-order derivatives in the term (very handful if is needed to include dispersion effects). For example, if one desires to solve an equation in the form:
(d/dz+ d^2/dx^2- 0.25*d^3/dx^3)Y == 0
It can be solved using the following code:
z=linspace(0,1,512)
x=linspace(-5,5,1024)
psi0=exp(-x.^2)
D=D_lateral1D(x,2)-0.25*D_lateral1D(x,3)
field=LinearBPM(psi0,D,z)
Where D_lateral1D is a provided function that "replaces" the derivative operator.
This function is a very early stage in a more complex set of non-linear BPM functions that I have made (split-step, spectral methods, etc.) and I will submit them when I finish their documentation and organization.
Sorry for my English, I m eager for your comments.
)
- 2010-07-05 12:02:42下载
- 积分:1
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pp5
图像加乘性噪声后 有门限平滑 不加门限平滑后图像(image processing noise gate)
- 2014-12-11 13:16:33下载
- 积分:1
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MATLAB求解非线性最小二乘法拟合问题 源程序代码 MATLAB-nonlinear-least-squares
MATLAB求解非线性最小二乘法拟合问题 源程序代码(MATLAB to solve the nonlinear least squares fitting problem source program code)
- 2020-11-18 16:59:38下载
- 积分:1
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Aver_Path_Length
复杂网络平均路径的计算,matlab源代码(Complex networks, the calculation of the average path, matlab source code)
- 2021-03-07 17:09:29下载
- 积分:1
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Earthquake-response-s
适合进行抗震分析计算。节省时间,可以计算出适合的反应谱、免费下载(Suitable for the calculation of seismic analysis. Save time, we can calculate the appropriate response spectrum,)
- 2013-04-09 13:09:59下载
- 积分:1
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Gabor-Filter
This code is used for extracting texture features in an image
- 2014-01-24 18:20:08下载
- 积分:1
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dynamicprogramming
本文介绍了动态规划的基本思想和基本步骤,通过实例研究了利用动态规划设计算法的具体途径,讨论了动态规划的一些实现技巧,并将动态规划和其他一些算法作了比较,最后还简单介绍了动态规划的数学理论基础和当前最新的研究成果。(This article describes the basic idea of dynamic programming and the basic steps, through the case study design algorithm using dynamic programming of specific channels to discuss some of implementation of dynamic programming techniques, and dynamic programming and other algorithms are compared, finally a brief introduction The mathematical theory of dynamic programming based on the latest research results and current.)
- 2010-05-17 21:44:10下载
- 积分:1
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Interpolation-and-fitting
插值与拟合的相关功能,使用Matlab软件,其中包含源程序和PPT解说(Interpolation and fitting)
- 2011-06-19 00:26:01下载
- 积分:1
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matlab_source_for_dsp
matlab source code for digital signal
- 2009-07-09 13:44:25下载
- 积分:1
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PPT-for-Non-local-means-with-dimensionality-reduc
PPT for an IEEE paper "non-local means with dimensionality reduction and sure-based parameter selection"
- 2013-08-05 17:20:03下载
- 积分:1