Sampling

这是电网、理论中实现矩阵快速变换的程序代码，附有使用说明书，技术说明(This is a grid, matrix theory, to achieve rapid transformation of the program code, with the use of brochures, technical notes)

PID参数的整定就是合理的选择PID三参数。从系统的稳定性、响应速度，超调量和稳态精度等各方面考虑问题，三参数的作用如下：(PID parameter setting is the reasonable choice of three parameters of PID. From the system stability and response speed, overshoot and steady state accuracy and so on various aspects to consider problem, the role of the three parameters are as follows:)

产生psk调制信号的源程序，并对信号进行成型滤波及上变频(generate PSK modulated signals, and the signals pass the shaping filter and DUC)

面波模拟，地震记录中存在面波干扰，采用波动方程形式很难模拟，提供简单的褶积面波模拟方式(Surface wave simulation, surface wave interference is present seismic records, in the form of the wave equation is difficult to simulate, provides a simple way of convolution surface wave simulation)

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适合初学者使用的图像水印代码，代码不长，大约70行(Image Watermarking code for beginners)

system identification (OPA)

采用db4小波对是与信号进行降噪处理，实际效果良好(Using DB4 wavelet denoising is processing and signal, the actual effect is good)

事先计算图像的标准差，可以用来评判图像变换是否可信(Calculate the standard deviation of the prior image can be used to judge the credibility of image transformation)

说明：  一个协作系统的设计，对初级学生很有帮助。主要包括协作系统的各种参数。(A collaborative system design, useful for primary students. Includes various parameters of collaboration systems.)