OFDM

说明：  图像检索 毕业设计的 关于 七个不变矩的 简单的实现功能的算法 给予你思路的一个小小的编程！！！(Image Retrieval on the graduation of seven moment invariant features a simple algorithm for the realization of an idea to give your little programming! ! !)

Just reads mp3 file and converts it to wav. Not a fact that it works completely correct, but some algorithms, may be useful. wav = mp3read(inpath, outpath) outpath is unused. inpath - path to mp3 file

实现神经网络PID进行编程，仿真，此神经网络是BP神经网络。(Realize the neural network PID programming, simulation, the neural network is BP neural network.)

MNIST手势识别数据库进行softmax回归分类，直接运行softmaxExercise.m文件即可运行。(The MNIST gesture recognition database is classified by soft Max regression and can be run directly by running the softmaxExercise. m file.)

《最优阵列处理》一书第五章的MATLAB例程，关于阵列空时模型的算法。(" Optimal array processing," the sixth chapter of a book of MATLAB routines, including the optimal beamforming algorithm.)

DC-AC逆变器 DC-DC变换器 pwm控制(DC-AC逆变器 pwm控制)

KALMAN filter for linear time invariant estimation

利于理解并实际运用蒙特卡洛的例子，该例子为股票预测实例和绵羊与汽车(It helps to understand and apply the example of Monte Carlo. This example is an example of stock prediction.)

说明：  ：针对MP3 编码方式和帧结构进行分析，利用帧中的比例因子提出了一种压缩域水印算法。算法通过引入帧变化分析步 骤，很好地实现了水印的自适应嵌入。对于不同的系统要求，还可以通过修改门限信噪比的值SNRlim按需进行水印嵌入，使算法 具有更大灵活性。同时在牺牲一定的嵌入空间前提下，实现了水印信息的自同步。实验表明，对于不同风格的音乐，该水印算法 具有很好的不可听性。(In this paper，the encoding method and the frame structure of MP3 are expounded in detail，a watermark algorithm is proposed based on the scale factor in MP3 frame.By introducing the step of frame altering analysis，the algorithm can realize that watermarks is embedded adaptively.By modifying threshold SNRlim（the ratio of signal to noise），the algorithm can meet different requirements of some system，that is what enable the algorithm to have a bigger flexibility.Based on expense of some embedding positions，the watermark can be embedded with self-synchronization.The experiment results show this algorithm can get a good audio effect with various types of audio.)

code to calculate the determinant of symbolic matrix