zishiying

说明：  用模拟退火的算法解决中国旅行商的问题，结果画出图形直观明了！(Using simulated annealing algorithm to solve traveling salesman problem of China, resulting in intuitive and clear graphics to draw!)

二阶粒子群，比pso更加精确更加灵敏地优化函数。在标准pso算法中，微粒的飞行速度仅仅是微粒当前位置的函数，而二阶粒子群算法中微粒飞行速度的变化与微粒位置的变化有关(Second swarm, more sensitive and more accurate than pso optimize function. Pso algorithm in the standard, the particle particle flight speed is only a function of the current position, the second particle swarm flying speed of particles in the particle changes related to changes in the position)

基于快速傅里叶变换的GUI设计，能对多个输入序列进行FFT分析，并在画面上显示出输入信号，经过FFT处理，经过IFFT处理的信号波形(GUI design based on the fast Fourier transform, FFT analysis of a plurality of input sequences, and displayed on the screen of the input signal after FFT processing, the signal waveform after the IFFT processing)

An Ant Colony Algorithm for Multiuser Detection in Wireless Communication Systems(An Ant Colony Algorithm forMultiuserDetection in Wireless Communication Systems)

matlab绘图的一个程序，程序不是很长 但比较经典 (very good)

说明：  通信系统的仿真,卷积码是纠错码的一种,可以用于数字电视,手机等通信领域,本例子给出了基于matlab的程序,可用于实际的仿真!(communications system simulation, convolutional codes is an error-correcting code that can be used in digital TVs, mobile phones and other communications, this example is based on the Matlab program can be used for actual simulation!)

位置指令为幅值为1.0的阶跃信号，r（k）=1.0。网络结构为1-4-1，高斯函数的参数值取Cj=[-2 -1 1 2]T ，B=[0.5 0.5 0.5 0.5]T 。 网络权值学习参数为η=0.30，α=0.05 。PID控制各参数的初RBF网络控制，被控对象为G（s）= 取采样时间为1ms，采用Z变换进行离散化，离散化后的被控对象为 y(k)=-den(2)*y（k-1）-den(3)*y(k-2)+num(2)*u(k-1)+num(3)*u(k-2) 始值为，kp=20， kd=0.3， ki=0.1。 (Position command for the step signal amplitude of 1.0, r (k) = 1.0. The network structure is 1-4-1, the Gaussian function parameters taken Cj = [-2-1 1 2] T, B = [0.5 0.5 0.5 0.5] T. Weight learning parameter η = 0.30, α = 0.05. PID control parameters at the beginning of each RBF network control, the controlled object is G (s) = take the sampling time is 1ms, using the Z transform discrete, discretized controlled object is y (k) =-den (2)* y (k-1)-den (3)* y (k-2)+num (2)* u (k-1)+num (3)* u (k-2) initial value, kp = 20, kd = 0.3, ki = 0.1.)

DHMM问题3matlab实现，即给出训练数据，求解（A，B,pi）(Implement of DHMM，i.e，given training data ,estimate (P,Q,pi))

matlab code 2d periodic graphene

小波变换去噪，利用的是小波阈值化图像消噪去噪，matlab开发的(Wavelet denoising using the wavelet thresholding denoising image denoising, matlab development)