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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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matlabcodeforNumerical
用matlab实现各种数值计算的源代码,对于需要数值计算的非常有参考价值。(To achieve a variety of numerical calculation with matlab source code for the numerical calculation needed a very good reference material.)
- 2009-12-02 12:24:43下载
- 积分:1
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Fourier_matlab
附件1是关于FFT算法的详细编程,及详细原理讲解,个人认为,这篇论文对从事信号处理,频谱分析很有帮助,特使是进一步理解FFT算法,很有必要阅读。
程序+原理+运行!
附件2是关于直接运行FFT工具箱进行频谱分析,请大家可以参考对照,对理解FFT算法肯定有帮助!
(matalb fft 频谱分析)
- 2011-01-16 21:47:31下载
- 积分:1
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Lfnewton
load flow solution with newton-Raphson method
- 2012-10-04 14:46:50下载
- 积分:1
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flycontrol
飞控程序加仿真模块 简单实用 可以控制高度的简单程序(Flight Control program plus simple and practical simulation module can control the height of a simple program)
- 2016-03-12 11:33:58下载
- 积分:1
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kalman
自己做的一个卡尔曼滤波程序作业,要求求出其最佳估计及估计误差。(A Kalman filter to do its own work program, requested and obtained the best estimate of the estimation error.)
- 2010-09-21 09:41:19下载
- 积分:1
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p
说明: 海平面数模程序——针对国际赛的一个题目,很好很实在(Sea-level digital-analog process- a topic for international competitions)
- 2011-07-16 23:00:35下载
- 积分:1
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lorenz-system-plot
lorenz系统,这是第一个文件定义lorenz系统(lorenz system plot this is file 1, the lorenz system define)
- 2013-07-31 16:13:10下载
- 积分:1
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copula
GOOGLE代码网站最全的COPULA公式MATLAB合集(COPULA formula code on GOOGLE website the most complete collection for MATLAB)
- 2021-04-07 12:29:01下载
- 积分:1
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matlab
实验指导 低通采样定理实验 FFT频谱分析实验 IIR滤波器设计实验 窗函数法FIR滤波器设计 频率采样法FIR滤波器设计实验(Experimental guide low-pass sampling theorem FFT spectrum analysis experiment experiment experiment IIR Filter Design Window Function FIR filter design frequency sampling FIR filter design experiment)
- 2009-01-08 10:57:04下载
- 积分:1