Rec618_10

说明：  Matlab版本代码，主要研究数字水印的DCT算法(Matlab version of the code, the main algorithm of digital watermark DCT)

编写一个matlab函数用一个N点离散傅里叶变换同时计算两个N点实序列的离散傅里 叶变换，并将结果与直接使用两个N点离散傅里叶变换计算出来的结果进行比较(Write a matlab function with an N point discrete Fourier transform and calculate actual sequence of two N point discrete Fourier transform, and the results with the direct use of two N point Discrete Fourier Transform calculated results are compared)

该程序实现改进的自适应相关算法，两个matlab文件，一个为函数，该函数求出信号特征量的马氏距离平方并通过梯度下降法训练出其固定阈值，另一个为主函数，调用该函数文件；该程序将4路信号，每一路信号特征量的马氏距离平方及其固定阈值求出来，并一起画出图来。 (The program features improved adaptive correlation algorithm, two matlab files, one for the function that calculate the square of the Mahalanobis distance of signal characteristics by gradient descent to train the fixed threshold, the other main function, call The function files the program seek out the square of the Mahalanobis distance and fixed threshold of each channel signal, there are four chanel signal,then draw them out together)

调整figure的大小和位置 设置颜色、字体、字号、加粗、倾斜 设置坐标范围、刻度线 设置图中线宽、坐标线宽 在图中添加文本标记 自动使figure最大化( Adjust the size of the figure and location Set the color, font, font size, bold, tilt Set the coordinate range, the scale line Set figure line width, coordinates, line width Text markup is added in the figure To maximize figure automatically )

matlab code for Phase Locked Loop tutorial

说明：  利用matlab求解线性规划与非线性规划(Using matlab for solving linear programming and nonlinear programming)

直流双闭环无静差调速，参数已经给定，调试运行成功。(DC double closed loop static droop parameters have been given, debugging and running successfully.)

alternator project - synchronus machine project

用MATLAB程序打开数字地震数据记录SAC格式。(using Matlab, it can open the data of seismic wave.)

newmarkbeta法的MATLAB程序，可用于时程分析(The MATLAB program of newmarkbeta method can be used for time history analysis.)