lorenz-system-plot

里查得森(Richardson)法解偏微分方程的程序。解的是定步长的抛物型偏微分方程： du/dx - a * d2u/dx2 = 0 在程序中可以更改 a 的值以实现不同系数的解。由于它是一种显式格式，解的结果不稳定 在Matlab7下面运行发现竟然有一些值达到十的几十次方,这是算法本身决定的。不是程序有错误(Richard Anderson (Richardson) Solving partial differential equations procedures. Solution is scheduled to step parabolic partial differential equation: du/dx- a* d2u/dx2 = 0 in the procedure can be changed in order to realize the value of a different coefficient of the solution. Because it is an explicit format, the result of instability in the solution of the following Matlab7 running even found some value reached ten dozens of parties, this is the decision algorithm itself. Not a procedural error)

说明：  本程序用矩阵实现有限差分算法，本程序求解第一类边界条件下无源矩形金属槽电位分布，计算电磁学。(A simple code for finite difference method.)

国外使用面元法计算翼型升力的matlab程序包(matlab program using panel method to solve the lift of the foil)

Clark变换与Inv_Clark变换，引入输入信号进过测试能够实现功能(Clark and Inv_Clark)

仿真分析相控阵雷达中一维线阵的栅瓣效应产生的原因及避免方法，并画图(And the method of avoiding the simulation analysis causes of grating lobes linear phased array radar, and drawing)

说明：  中位数近似算法实现的背景减除。matlab代码。(Median approximation algorithm for background subtraction. matlab code.)

完成傅里叶的变换，将时间域的信号转换到频率域(The complete Fourier transform converts the signal of the time domain to the frequency domain)

二维中子扩散方程计算，计算二维堆内中子通量分布情况。(Two-dimensional neutron diffusion equation)

New quasi-lossless compression of partitioned KLT and IWT multispectral images

tA scheme of format conversion optical 16-ary quadrature amplitude modulation (16QAM) toquadrature phase shift keying (QPSK) signal based on cascaded four-wave mixing (FWM) in semiconduc-tor optical amplifiers (SOAs) is proposed. Theoretical analysis and simulations of the format conversionscheme are conducted to validate the feasibility of the proposal. In this proposal, the phase conjugatedof 16QAM signal is generated after the first FWM process in an SOA, and then the QPSK signal is con-verted due to the second non-degenerate FWM (ND-FWM) process in another SOA. The performance andthe optimal design of the 10 Gbit/s format conversion system under various key parameters of SOAs are uated and discussed. Simulation results present useful to enable interconnection between backbonenetwork and access network.