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matlab 实用教程（ppt，源代码） 包括画图 计算 变成(matlab Practical Guide (ppt, source code), including the calculation into a drawing)

设计一个8阶以内的带通滤波器，通带截止频率fc1=30070HZ，fc2=32170HZ，通带内允许最大衰减0.2dB。设计满足要求的Butterworth滤波器和chebyshev滤波器。以RC运放为基本单元以最易实现的原则完成电路设计及参数选择，并根据设计参数进行幅频特性和相频特性的仿真，给出仿真曲线。分析电路的无源灵敏度。(Design within an 8-order band-pass filter, the passband cutoff frequencies FC1 = 30070HZ, FC2 = 32170HZ allow maximum attenuation 0.2dB within the passband. Designed to meet the requirements of the Butterworth filter and chebyshev filter. RC op amp is the basic unit is the most easy to implement the principle of complete circuit design and parameter selection, and in accordance with the design parameters of the amplitude-frequency characteristics and phase-frequency characteristics of the simulation, simulation curve. Passive sensitivity of the analysis circuit.)

利用retinex理论对雾霾天气下的图像进行去雾处理，达到图像增强的效果(Retinex theory use images under fog and haze were treated to fog, to image enhancement effect)

说明：  MATLAB神经网络工具箱理论与应用，解压后需用超星阅览器打开(MATLAB neural network toolbox theory and application, need to use SSReader open after decompression)

MATLAB学习与应用，便于同学掌握其相关功能，实现在学习中熟练应用(Learning and application of MATLAB to facilitate the students to master their related functions, to achieve proficiency in the application of learning)

这是一个matlab基于主成分分析的特征提取的源代码(This is a matlab based on principal component analysis, feature extraction source code)

梯度下降法是一個一階最佳化算法，通常也稱為最速下降法。 要使用梯度下降法找到一個函數的局部極小值，必須向函數上當前點對應梯度（或者是近似梯度）的反方向的規定步長距離點進行疊代搜索。如果相反地向梯度正方向疊代進行搜索，則會接近函數的局部極大值點；這個過程則被稱為梯度上升法。(The gradient descent method is a first-order optimization algorithm, also commonly referred to as the steepest descent method. To find the local minimum of a function using the gradient descent method, an iterative search must be performed to the specified step distance point in the opposite direction of the gradient (or approximate gradient) of the current point on the function. If the search is reversed in the opposite direction to the positive direction of the gradient, it will approach the local maximum point of the function; this process is called the gradient ascent method.)

这是一篇关于恒定束宽的综述文章，文中描述了行程恒定束宽的最新方法，希望对研究频不变信号的人有用(This is a constant beam width on the overview of the article, this paper describes the latest travel a constant beam width, and I hope the study of constant-frequency signals were useful for)

说明：  随机信号处理AR自回归模型，谱分析的一种重要方法(Random signal processing AR auto-regressive model, spectral analysis of an important method)

方位估计实验，MVDR 高分辨方位估计，基于实测实验数据。(DOA with MVDR theorem ，based on real data from waterbank experiment。)