wavelet

Example of working with binary file

TFIDF计算方法详细解释，代码解释很多，也有帮助文档(TFIDF calculation method explained in detail, explain a lot of code, but also help documentation)

图像压缩算法的各种算法，用VC++实现，直接可以编译运行(Image compression algorithms algorithms, using VC++ implementation can be compiled to run directly)

对二阶rc等效电池模型运用matlab进行最小二乘法在线系统辨识的程序(Equivalent second-order rc battery model using least squares method matlab online system identification procedures )

空间计量经济学中空间面板模型的matlab实现程序(Space panel model of spatial econometrics matlab program)

固高所有GE运动控制卡的DEMO软件，用来测试板卡是否正常工作(Googol all GE motion control card DEMO software, used to test the board is working correctly)

仿真程序：首先需要用一个随机发生器产生（0.1）内的均匀随机数，然后再将该序列映射到对应的幅度电平｛Am｝。然后将这个范围再分成4个相等的区间，这些子区间分别对应于4个信号比特的符号00，01，10，11。检测器观察到r=Am+n，并且计算r和4种可能传输的信号幅度之间的距离，它的输出Bm就是相应于最小距离的信号电平。Bm与真正的的传输信号幅度比较，差错计数器用来对检测器产生的差错计数。(Simulation program: first need to use a random generator (0.1) the uniform random number, then the sequence is mapped to the corresponding amplitude level {Am}. Then this range has been divided into four equal intervals, these sub-intervals corresponding to four signal bits of the symbol 00,01,10,11. Detector observed r = Am+ n, and calculate r and 4 possible transmission distance between the signal amplitude, its output corresponding to the minimum distance Bm is the signal level. Bm and the real rate of transmission of the signal comparison, error detection counter is used to generate the error count.)

二维信号卷积，若x为N1*M1的二维信号，y为N2*M2的二维信号，则卷积为(N1+N2-1)*(M1+M2-1)的信号(Two demension signal convolution. )

采用Hamming窗实现的低通滤波器，可设置通带频率、截止频率以及带宽等滤波器特性参数。(The low-pass filter is realized by using Hamming window, can set the passband filter characteristic parameters such as frequency, the cut-off frequency and bandwidth.)

这个代码的主要作用是练习用的，可以用它来练习，然后得到提高(The code is based on Practice，so we can use it to make some improvement and maybe it can realize some new functions)