1vsr

说明：  Shepp-Logan CT 检测器坏伪像仿真，矫正 (Shepp-Logan CT artifact rebuilt)

说明：  本程序实现了RGB图像转化为灰度图像，而后对图像进行了二值化，比较适合初学者，因为很多复杂的程序初学者比较难理解，我写的这个程序可以作为入门程序。(This program realized RGB images to gray image, and then to the binary image.It is suitable for beginners, because many complicated procedure is difficult for beginners, I write this program can be used as introductory programs.)

基于子空间的MUSIC算法，求到达角、离开角(Subspace-based MUSIC algorithm, and angle of arrival, left corner)

以下在matlab中利用图像处理工具箱实现均方误差（MSE）、峰值信噪比（PSNR）和熵的源代码 (The following use in matlab image processing toolbox mean square error (MSE), the peak signal to noise ratio (PSNR), and entropy source code)

(有源代码)数值分析作业,本文主要包括两个部分,第一部分是常微分方程(ODE)的三个实验题,第二部分是有关的拓展讨论,包括高阶常微分的求解和边值问题的求解(BVP).文中的算法和算例都是基于Matlab计算的.ODE问题从刚性(STIFFNESS)来看分为非刚性的问题和刚性的问题,刚性问题(如大系数的VDP方程)用通常的方法如ODE45来求解,效率会很低,用ODE15S等,则效率会高多了.而通常的非刚性问题,用ODE45来求解会有很好的效果.从阶次来看可以分为高阶微分方程和一阶常微分方程,高阶的微分方程一般可以化为状态空间(STATE SPACE)的低阶微分方程来求解.从微分方程的性态看来,主要是微分方程式一阶导系数大的时候,步长应该选得响应的小些.或者如果问题的性态不是太好估计的话,用较小的步长是比较好的,此外的话Adams多步法在小步长的时候效率比R-K(RUNGE-KUTTA)方法要好些,而精度也高些,但是稳定区间要小些.从初值和边值来看,也是显著的不同的.此外对于非线性常微分方程还有打靶法,胞映射方法等.而对于微分方程稳定性的研究,则诸如相平面图等也是不可缺少的工具.值得提出的是,除了用ode系类函数外,用simulink等等模块图来求解微分方程也是一种非常不错的方法,甚至是更有优势的方法(在应用的角度来说).((Source code) numerical analysis homework, this docment includes two parts, the first is ordinary differential equations (ODE) of the three examples, the second part is about the expansion of the discussion, including the higher-order ordinary differential & boundary value solution Problems (BVP). the text of the algorithm and numerical examples are based on the Matlab. ODE from the rigid (STIFFNESS) look into the issue of non-rigid and rigid problem, rigid problems (such as large coefficient VDP equation) such as using the always method ODE45 used to solve the problems , efficiency will be low, with ODE15S the other hand, many of the high efficiency. and the usual problem of non-rigid, there will be used to solve ODE45 very good results. Judging from the order can be for high-order differential equations and first-order ordinary differential equations, higher-order differential equations can be transformed into a general state space (STATE SPACE) used to solve the low-order different)

潮流调和分析，matlab的经典程序，希望对大家有用，祝好运(matlab classic program， hope helpful to you，good luck)

阵列信号处理的高分辨率估计，微分方程组数值解方法，结合PCA的尺度不变特征变换(SIFT)算法。( High-resolution array signal processing estimates, Numerical solution of differential equations method, Combined with PCA scale invariant feature transform (SIFT) algorithm.)

sar图像去噪的几种新的方法，从先验概率中采样，计算权重，二维声子晶体FDTD方法计算禁带宽度的例子。( Several new methods sar image denoising, Sampling a priori probability, calculate the weight, Dimensional phononic crystals FDTD method calculation examples band gap.)

Matlab code for cross talk.

说明：  《matlab语言常用算法程序集》源代码第四章(&quot Matlab common algorithms assembly language&quot source code, Chapter IV)