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BP-神经网络相关的Matlab源码程序(BP)

轴承故障谱峭度分析，打开直接运行，包含包络谱分析(Bearing failure analysis of spectral kurtosis, open directly run, including envelope spectrum analysis)

基于遗传算法的LQR控制器优化设计的Matlab实现(LQR controller design based on genetic algorithm optimization)

Handling videos in MATLAB: This describes various apis that are used for handling videos in matlab.

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. )

Okumura analyzed path-loss characteristics based on a large amount of experimental data collected around Tokyo, Japan. He selected propagation path conditions and obtained the average path-loss curves under flat urban areas. Then he applied several correction factors for other propagation conditions, such as: Antenna height and carrier frequency Suburban, quasi-open space, open space, or hilly terrain areas Diffraction loss due to mountains Sea or lake areas Road slope Hata derived empirical formulas for the median path loss (L50) to fit Okumura curves.

说明：  相关向量机RVM.可以做分类，回归。具体运行例子，演示程序在Demo.m，供大家参考和修改成自己想要实现的程序。(Can do classification and regression. Specific operation examples. Put it in a WORD specifically for your reference and modification into the program you want to achieve.)

1.matlab编程，实现函数的倒排序； 2.程序实现FFT,傅立叶逆变换； 3.一个图像处理程序，添加噪声，去噪。 (1.matlab programming, realize inverted sort function 2. Procedures realize FFT, inverse Fourier transform 3. An image processing program, add noise, de-noising.)

This letter presents a novel algorithm to compute the instantaneous frequency (IF) of a multicomponent nonstationary signal using a combination of fractional spectrograms (FS). A high resolution time frequency distribution (TFD) is defined by com-bining FS computed using windows of varying lengths and chirp rates. The IF of individual signal components is then computed by applying a peak detection and component extraction procedure

Signal And Systems Lab_7