Newton

该文档包含了深度学习中主成分分析（PCA）的程序代码(this document contain PCA of deep learning)

基于帧差法的运动目标检测的matlab代码(Frame difference method based on moving object detection matlab code)

这是一个图像分割程序，基于snake方法，对初始位置选择要求较高，在matlab环境下调试运行(This is an image segmentation procedures based on the snake, location of the initial demand for a higher choice, In Matlab environment debugging operation)

惩罚函数法求函数的最小值，包括建立罚函数，牛顿法求最小值(Penalty function method to find the minimum value of the function, including the establishment of the penalty function, Newton' s method for the minimum)

Some algorithms of variable step size LMS adaptive filtering are studied．The VS—LMS algorithm is improved． Another new non-linear function between肛and e(／ t)is established．The theoretic analysis and computer simulation results show that this algorithm converges more quickly than the origina1．Furthermore，better antinoise property is exhibited under Low—SNR environment than the original one．(variable step size of a LMS daptive filtering are studied. The VS-LMS algorithm is improved. Another new non-linear function between anus and e (/ t) is established. The theoretic analysis and computer simulatio n results show that this algorithm converges mo 're quickly than the origina1. Furthermore, better antinoise property is exhibited under L ow- SNR environment than the original one.)

基于Matlab的数字通信原理，介绍了各种通信方式的原理和相应的Matlab编程，是学习数字通信原理的绝好材料。 (Digital Communication Principle in Matlab for students and engineers is very good conference.)

Backpropagation, an abbreviation for backward propagation of errors , is a common method of training artificial neural networks used in conjunction with an optimization method such as gradient descent. The method calculates the gradient of a loss function with respects to all the weights in the network.

利用Matlab仿真软件，完成如图1所示的一个基本的数字通信系统。信号源产生0、1等概分布的随机信号，映射到16QAM的星座图上，同时一路信号已经被分成了实部和虚部，后边的处理建立在这两路信号的基础上。实部、虚部信号分别经过平方根升余弦滤波器，再加入高斯白噪声，然后通过匹配滤波器（平方根升余弦滤波器）。最后经过采样，判决，得到0、1信号，同原信号进行比较，给出16QAM数字系统的误码。(Using Matlab simulation software, as shown in Figure 1 to complete a basic digital communications systems. Signal source such as arise over the distribution of 0,1 random signal, is mapped to 16QAM constellation diagram, at the same time all the way the signal has been divided into real and imaginary parts, behind the deal with the establishment of these two signals in the basis. Real part, imaginary part of the signal, respectively, after a square root raised cosine filter, then add white Gaussian noise, and then through the matched filter (square root raised cosine filter). Finally, after sampling, the verdict has been 0,1 signal, to compare with the original signal is given 16QAM digital system error.)

sample code to show how to perform digital filtering using fast fourier transform

matlab编程时需要用到的常见函数的用法及作用(usage and the role of the common functions needed in the Matlab programming)