matlab

DC MOTOR SPEED CONTROL 8

MATLAB小程序:关于MATLAB中结构体与元胞数组的使用(small MATLAB : MATLAB on the structure and cellular arrays use)

ora code is usefull apart with the codes sent above

本文算法是将24 位真彩图的亮度分量分块 DCT ,然后利用DCT 量化系数的奇偶特性嵌入8 位灰度水印图,并通过PN 序列加密来保证水印的 安全性。算法中,将灰度图像转换为二进制数据 流,置乱后扩频调制,隐藏在宿主DCT 系数量化值 中,提取时不需要宿主信号,实现水印信号的盲提 取。(This algorithm is 24-bit true color pictures of the luminance component of block DCT, quantization DCT coefficients and then use the parity properties of 8-bit grayscale watermark embedding map, and through the PN sequence of encryption to ensure the security of the watermark. Algorithm, the gray image into binary data stream, scrambling after the spread spectrum modulation, hidden in the host DCT coefficient quantization values, the extraction does not require the host signal, the blind watermark extraction.)

说明：  最小化l1范数的Matlab代码。求解模型为： min lambda*|x|_1+||A*x-y||_2。其中，|x|_1表示x的1-范数，||*||_2表示2-范数。该模型在稀疏成分分析、压缩传感器等领域有广泛的用途。( l1-Regularized Least Squares Problem Solver l1_ls solves problems of the following form: minimize ||A*x-y||^2+ lambda*sum|x_i|, where A and y are problem data and x is variable (described below). )

说明：  这是一个完善的KNN算法。算法清晰，备注明确，分类效果良好。(This is a perfect KNN algorithm. Algorithm is clear, clear notes, a good classification results.)

生物肌电信号的频域参数：平均功率频率和中值频率(Biological EMG signals frequency-domain parameters: mean power frequency and median frequency)

file is for image proccesing

无监督神经网络利用matlab能够有效的实现图像化，还能得到最有结果(Unsupervised neural network using matlab can effectively realize the image of, but also get the most results)

两个复正弦加白噪声随机过程之和。用MUSIC方法进行信号频率谱估计。(The sum of two complex sinusoidal added white noise random process.The MUSIC method is used to estimate signal frequency spectrum.)