sand-pile

LDPC码理论方面的高性能密度进化仿真测试例程，可以跑出数值结果(LDPC DENSITY EVOLUTION)

加权最小二乘法.用matlab实现加权最小二乘法，采用封装函数的形式编写，易于使用。(Weighted least squares method. Using matlab realize the weighted least squares method, in the form of wrapper function written, easy to use.)

describe the chaotic map and its precision IEEE.584 or fix and the measure of periodicity

说明：  滑膜变结构控制的matlab仿真研究与分析，这个不错(Synovial matlab simulation of variable structure control research and analysis, this looks good)

matlab 学习技巧，现在把我用的，也就是对我帮助很大的留个文件传上去，希望对大家有用，第一应用与技巧(matlab learning skills, and now I use, which is a great help to me to leave a document passed up, we want to be useful, the first application and skill)

说明：  用鲁棒控制方法来控制一个简单的二阶机械系统：质量块-阻尼器-弹簧系统。该系统是本科生实验教学中常见的控制实验装置。作为本书中的第一个案例，将针对该装置介绍三种控制器的详细设计方法，分析闭环系统的鲁棒稳定性和鲁棒性能。为了简化设计过程，此处仅考虑模型的结构扰动（参数扰动）。针对此例，介绍了matlab鲁棒控制工具箱（Robust Control Toolbox）一些鲁棒控制器设计指令。希望此章的学习不仅能够教授鲁棒控制系统设计方面的知识，也能够教会大家如何使用鲁棒控制工具箱。(Robust control method is used to control a simple second order mechanical system: mass damper spring system. The system is a common control experimental device in undergraduate experimental teaching. As the first case in this book, the detailed design methods of three controllers for the device are introduced, and the robust stability and robust performance of the closed-loop system are analyzed. In order to simplify the design process, only the structural disturbance (parameter disturbance) of the model is considered here. For this example, some robust controller design instructions of MATLAB robust control toolbox are introduced. I hope that this chapter can not only teach the knowledge of robust control system design, but also teach you how to use robust control toolbox.)

说明：  这是“Active contours driven by local and global intensity fitting energy with application to brain MR image segmentation”（简称LGIF模型）的MATLAB源代码。LGIF模型是非常重要局部区域活动轮廓模型, 它结合了CV模型和LBF模型各自的优点。(This is the "Active contours driven by local and global intensity fitting energy with application to brain MR image segmentation" (referred to as LGIF model) of the MATLAB source code. LGIF model is very important to local area active contour model, which combines the CV model and the merits of LBF model.)

此函数实现了自动语音增强算法，使语音在指定的动态范围内。(This function has automatic speech enhancement algorithm, so that voice at the specified dynamic range.)

永磁同步电动机的仿真程序和说明，对于三相永磁同步电机性 能研究有重要作用(Permanent magnet synchronous motor simulation program and instructions for three-phase permanent magnet synchronous motor performance)

matlab实现函数y=sin(pi*x)的二次平方逼近的脚本语言，(matlab to achieve the function y = sin (pi* x) approximation of the second square of the scripting language,)