Runge-Kutta

matlab对机械四杆结构的仿真动画，很难找的，很有价值。(matlab mechanical simulation of four-bar structure animations, it is difficult to find, great value.)

说明：  齐声效应，能模拟几个演奏者同时演奏，但实际只有一个演奏者。(Chorus effect, can simulate several players while playing, but actually only one player.)

提出了结构半随机LDPC码的编码协同方案，并对该方案在不同的源到中继信道特性下 的误比特性能进行了仿真评价，结果显示该协同方案在不增加传送和接收功率的情况下，能够提供 更好的性能。(Structure of semi-random LDPC codes coded cooperative programs, and of the program in different source to relay channel characteristics, bit error performance simulation evaluation results show that the synergistic programs without increasing the transmit and receive power able to provide better performance.)

The code classification of a benchmark to evaluate the accuracy of binary images

Matlab code for Complex Smoothening with an example line.

k-means无监督机器学习聚类算法，使得同聚类中的记录欧式距离最小。(K-means machine learning method without instruction, minilizing the distances of records in each clusters the. )

说明：  地球绕圆心的运动，对各位应该有启发地球绕圆心的运动(The Earth' s movement around the center of a circle, there should be instructive for you)

自己编写的MATLAB函数，实现对图像的旋转。B是原图像，灰度或彩色，alpha是旋转角度（角度或弧度单位均可），A是旋转后图像。旋转后图像信息尽可能不损失。(I have written MATLAB function, to achieve image rotation. B is the original image, grayscale or color, alpha is the angle of rotation (degrees or radians per unit), A is rotated images. Rotation after the image information as possible without loss.)

由设计要求可知，wp<=0.2π，允许误差幅度小于1dB，ws>=0.3π内衰减应大于15dB。为了验证数字滤波器的实际滤波功能，设计程序时，把输入序列定为验证函数x（t）=4sin（100πt）以及x（t）=4sin（200πt）和x（t）=4sin（400πt）。又因为Ts=1.25ms，T=80ms，故采样点为64，即N=64，所以当M=6，可以同时调试并验证程序的滤波功能。(Seen by the design requirements, wp < = 0.2π, allow a margin of error of less than 1dB, ws> = 0.3π within attenuation greater than 15dB. In order to verify the actual filtering function of the digital filter design program, the input sequence as validation function x (t) = 4sin (100πt) and x (t) = 4sin (200πt) and x (t) = 4sin (400πt) . And because Ts = 1.25ms, T = 80ms, so the sampling points is 64, that is N = 64, so when M = 6, can debug and validate filtering program.)

The zip file contains 3 matlab files for solving ODE s and 3 other pdf files