Discrete_Bayes

说明：  some code of spectral estimation method-non parametric method

说明：  本代码编译环境为matlab，利用bp神经网络实现了建筑能耗预测，精度高，可扩展性好(This code the compiler environment Matlab, realize the building energy consumption prediction, by using the BP neural network has high precision, good scalability )

实验一 双极性矩形随机信号的归一化功率谱密度一 1.1 功率谱密度简介 平稳过程的任何一个非零样本函数的持续时间为无限长，显然都不满足绝对可积和总能量有限的条件。因此，它的傅里叶变换不存在即没有频谱函数。所以我们用功率谱密度来表述其频谱特性。 随机过程的任一实现是一个确定的功率型信号。而对于任意的确定功率信号f(t)，它的功率谱密度为： 式中， 是f(t)的截短函数 对应的频谱函数。f(t)是平稳随机过程 的一个实现。而随机过程某一个实现的功率谱密度不能作为过程的功率谱密度。过程的功率谱密度应该看作是任一实现的功率谱密度的统计平均，即 虽然该式给出了平稳随机过程的功率谱密度，但我们通常都不利用这个式子来计算功率谱。我们知道，确知的非周期功率信号的自相关函数与功率谱密度是一对傅里叶变换。对于平稳随机过程，也有类似的关系，即 和 对于平稳随机过程我们通常先求出其自相关函数再利用上式求出其功率谱密度。 1.2 实验要求  1.了解平稳随机信号功率谱的概念及计算方法  2.仿真不同占空比，等概、非等概双极性矩形随机信号的归一化功率谱密度  3.分析不同信号所包含的频谱分量，有无直流分量和定时分量信息 (A pair of rectangular random experiment polarity signal sample return a nonzero function of any duration power spectral density of a 1.1 power spectral density of a stationary process Introduction of infinite length, apparently not satisfied absolutely integrable and the total energy of the limited conditions. Therefore, it is the Fourier transform of the spectrum that does not function does not exist. Therefore, we use the power spectral density to express their spectral characteristics. Any random process is a realization of a certain type signal power. For arbitrarily determined power signal f (t), its power spectral density is: wherein, is f (t) is a function corresponding to the truncated spectrum function. f (t) is a stationary random process of realization. The random process to achieve a certain power spectral density can not serve as the power spectral density of the process. Power spectral density process should be seen as a statistical average power spectral density of any r)

关于中性点接地故障分析仿真，仿真了中性点接地系统零序电流大小及规律。(On neutral ground fault analysis and simulation, simulation of neutral grounding system zero sequence current size and regularity.)

说明：  求一类常系数线性常微分方程特解的有限递推法(A class of Linear Ordinary Differential Equations with Finite Recursion)

说明：  天线程序 matlab编写 水平极化方式 方向图 (antenna)

凸轮的轮廓曲线的图形，机械凸轮的轮廓曲线的线性图。(Cam profile curve graphics, mechanical cam profile The linear map.)

车牌定位系统的目的在于正确获取整个图像中车牌的区域，并识别出车牌号。(The purpose of plate positioning system to obtain the correct license plate area in the whole image, and brand recognition out of the bus.)

说明：  简单的无线功率控制，采用matlab实现(Simple wireless power control, the use of matlab to achieve)

一个在matlab环境下编写的采用expectation maximization方法计算高斯混合模型的程序。(One in the matlab environment prepared by the use of expectation maximization method GMM procedure.)