jiaquanzhixin

随书光盘DYNAMIC SIMULATION OF ELECTRIC MACHINERY (ＣＤＲＯＭ　ＦＯＲ　DYNAMIC SIMULATION OF ELECTRIC MACHINERY )

判断一组数据的概率分布函数，包括正态分布、泊松分布、伽马分布等。(The probability distribution function to determine a set of data, including a normal distribution, the Poisson distribution, gamma distribution.)

一个基于Simulink及GUIDE的PID控制界面呢DEMO.用户可以从面板上修改PID参数，直接仿真出PID结果(A demo application using simulink &GUIDE to accomlish PID control.Users can modify KP,KI,KD from the GUI for their own desired simulation conditions.)

用遗传算法来改善BP神经网络模型，可以很好的用于最优化、预测等问题的求解(Using genetic algorithms to improve the BP neural network model, can be very good for optimization, forecasting and other problem solving)

这是高压变频的matlab仿真模型，可以用的，大家可作参考。欢迎下载。(This is the matlab simulation model of high voltage frequency conversion, can use, you can reference. Welcome to download. )

传统的短时谱估计语音增强算法通常假设语音谱分量相互独立，没有考虑语音谱分量间的相关性。针对这 一问题，该文提出一种新的基于多元Laplace分布模型的短时谱估计算法。首先，假设语音的离散余弦变换(DCT) 系数服从多元Laplace分布，以此利用谱分量间的相关性；在此基础上，利用多元随机矢量的高斯尺度混合模型表 示，推导得到语音DCT系数矢量的最小均方误差(MMSE)估计的解析表达式；并进一步推导了基于该分布模型的 语音存在概率，对最小均方误差估计子进行修正。实验结果表明，该算法在抑制背景噪声和减少语音失真等方面优 于传统的语音增强方法。(The spectral components of speech are usually assumed to be independent in traditional short-time spectrum estimation, which is not the case in practice. Tosolve this problem, a new speech enhancement algorithm with multivariate Laplace speech model is proposed in this paper. Firstly, the speech Discrete Cosine Transform (DCT) coefficients are modeled by a multivariate Laplace distribution, so the correlations between speech spectral components can be exploited. And then a Minimum-Mean-Square-Error (MMSE) estimator based on the proposed model is derived using a Gaussian scale mixture representation of random vectors. Furthermore, the speech presence uncertainty with the new model is derived to modify the MMSE estimator. Experimental results show that the developed method has better noise suppression performance and lower speech distortion compared to the traditional speech enhancement method. )

说明：  使用快速傅里叶逆变换，分析离散时间信号中频率分辨率和信号的样本数之间的关系，并通过不同的滤波器进行对比。(The relationship between the frequency resolution and the number of samples in the discrete-time signal is analyzed by using the inverse fast Fourier transform, and compared by different filters.)

基于Matlab的小车停车位模糊控制模型，通过使用Matlab工具箱中的模糊控制工具箱设计了将小车安全可靠地停到划定的停车位置上。(Matlab-based fuzzy control model of car parking spaces, by using the Matlab toolbox in the fuzzy control toolbox designed to stop the car safely and securely to the designated parking position.)

auto correlation programs

说明：  使用matlabR2007a编写的分类回归树代码，已经调试，可以运行(Prepared using matlabR2007a code classification and regression trees have been debugging, you can run)