funciones

微分方程（这里指的是常微分方程）指含有一次、二次、乃至高次微分未知数的方程。是解决偏微分方程、数理方程的基础。有许多特殊函数，都是为了无法得出多项函数或超越函数型式的解析解的微分方程而定义出来。这些特殊函数之所以重要，是因为它们描述了自然界中的某些现象，例如，电子的活动、鼓皮的振动、钟摆的摆动等等。(Differential equations (in this case is the ordinary differential equation) means containing one, two, and even high-differential equations unknowns. Is to solve the partial differential equations, mathematical equations based. There are many special functions, are not drawn to a number of functions or functions beyond the type of analytical solution of differential equations which define them. These special functions are important because they describe the nature of certain phenomena, for example, electronic activities, drum skin vibrations, pendulum swing, and so on)

说明：  通信信号的调制信息包含在信号的瞬时幅度、相位、频率的变化之中，不同的信号其频谱也呈现不同的特征，通过提取瞬时幅度、相位、频率以及频谱的参数统计特征，可以识别不同的通信信号。通常是利用对瞬时幅度、瞬时相位，瞬时频率和信号功率谱进行某种变换而得到可以明显区分各种信号的特征参数。(Communication signal modulation information is contained in the signal instantaneous amplitude, phase, frequency changes, the spectrum of different signals also show different characteristics, by extracting the instantaneous amplitude, phase, frequency and statistical characteristics of the parameters of the spectrum, you can identify different communication signals. Usually by the use of instantaneous amplitude, instantaneous phase, instantaneous frequency and signal power spectrum a transformation which can be clearly distinguished by the characteristic parameters of various signals.)

说明：  matlab 图像处理 使用噪声能量和图像一维自相关函数进行维纳滤波(matlab image processing and image noise energy use one-dimensional autocorrelation function of Wiener filter)

说明：  matlab高阶谱（双谱）分析直接法和间接法，可用于时差估计等(matlab order spectrum (bispectrum) of the direct method)

介绍了PWM整流器PI参数设计，并用matlab进行了仿真，很好很强大！(Describes the design of PWM rectifier PI parameters, and use matlab for simulation, the very very powerful!)

RADAR信号生成，有很多子程序，均可以运行(RADAR signal generation, many subroutines, can run)

拉普拉斯特征映射算法，可实现高维信号降维或实现带内滤波降噪。(Laplace feature mapping algorithm, can achieve high dimensional signal dimensionality reduction or implement band noise filtering.)

matlab写的多目标进化算法，值得学习和借鉴，直接修改使用(The multi-objective evolutionary algorithm written by Matlab is worth learning and using for reference.)

自己创建simulink库的时候所需要的文件，值得参考(Simulink library to create their own when the required documentation, it is also useful)

用于场景分类的代码，特征是事先提取好的，用PHOG特征(For scene classification code, characterized in that prior extraction good PHOG characterized)