mianyi

数字带通滤波器设计原理以及设计不同带宽的带通滤波器实例(Digital band-pass filter design theory and design of different instances of band-pass filter bandwidth)

偏微分方程的matlab实现。包括各种函数的调用的m文件(Partial differential equations in MATLAB implementation. Including all function calls m file )

使用MATLAB自带的函数，实现了50Hz带阻滤波器，其中的参数可以修改，即可以实现任意频率的陷波器。(Achieved a 50Hz notch filter)

当前图像脆弱性水印的研究主要从完全脆弱水印,半脆弱水印,图像可视内容的真伪鉴别与自嵌入式水印四个层次进行研究。该算法是完全脆弱图像水印的matlab实现(Completely fragile image watermarking matlab implementation)

project report for classification

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：  吴恩达机器学习代码练习第二章----逻辑回归(Andrew.Ng Machine Learning exercise 2)

model predictive control lmi tutorial

the mppt algorithm file

古典密码学中的一些实现加密的算法，用Matlab实现的。(Classical Cryptography to achieve some of the encryption algorithm, using Matlab to achieve.)