ARCLENGTH

选取windows系统自带的ding.wav信号作为分析对象，在Matlab软件平台下，利用函数wavread对音频信号进行采样，记住采样频率和采样点数，听一下原始声音sound(y, fs, bits)。 （2）音频信号的频谱分析，先画出音频信号的时域波形；然后对音频号进行快速傅里叶变换fft(y,N)，N取32768，画出信号的频谱特性，加深对频谱特性的理解。 （3）根据频谱，反演时域特性，画出时域波形。寻找幅值最大的两个频率，此频率除以fft点数在乘以采样频率就是信号的主频，即可合成信号的时域图形，听一下声音。 （4）对原音频信号进行1024点的分段付立业分析meshgrid （5）根据主要频线合成音频，并画出时域图形，试听合成效果。 （6）采用线性插值（linspace）和傅立业反变换(fliplr, ifft)分别合成音频，并画出时域图形，试听效果。 (err)

DCT变换：变换域系数选取采用阈值编码，：阈值越小，图像恢复效果越好，但压缩效果差，一般取在5-10 即可很好的获得恢复图像信息。(DCT transform: transform domain coefficients selected using the threshold coding: the smaller the threshold value, the better the image restoration, but the compression is poor, and generally in the 5-10 to get a good recovery image information.)

控制系统模型的建立：将常规PID控制改进为带自适应的模糊PID控制，使控制系统的精度和稳定性有比较好的效果(fuzzy pid control)

说明：  在二维 RGB 图像中嵌入水印，其中图像的大小和水印图像的大小可以不一致(2D RGB images embedded watermark, which images the size and the size of the watermark image can be inconsistent)

卡尔曼滤波仿真算法！！！经典的哦！！！！！！！！(Kalman filter simulation algorithm. ! !)

comfac算法是三线性模型常见的数据检测方法。它首先将三线性数据通过tucker3模型压缩，然后通过最小二乘的方法不断更新数据，直到收敛，得到估计值( The algorithm works by first compressing the data using a Tucker3 models. Subsequently the PARAFAC model is fitted to the compressed array, either initialized with DTLD (~ESPRIT) or with PARAFAC-ALS. The solution is de-compressed to the original space, and a few safe-guard PARAFAC-ALS steps are performed. Further optimization of this algorithm is possible, e.g. if the data are very large, if the profiles are very correlated or if the noise is huge. This 、 has not been pursued here, in order to have a generally applicable algorithm)

本程序是有限时域差分源程序，有详细注解，方便学习理解。(This program is a limited time domain difference source program, has detailed notes, easy to learn to understand. )

找了很久的很不错kalmanfilter源代码，我比较了一下，是我找到的最好的。(a very good source code for kalmanfilter。)

ECG signals subjected to Synchronized averaging

说明：  常用的绘图命令及程序示例，包括基本绘图函数及调用，三维绘图命令。(Common example of drawing commands and procedures, including basic drawing functions and calls, three-dimensional drawing commands.)