matlab-soc

梯度下降法是最早最简单，也是最为常用的最优化方法。梯度下降法实现简单，当目标函数是凸函数时，梯度下降法的解是全局解。一般情况下，其解不保证是全局最优解，梯度下降法的速度也未必是最快的。梯度下降法的优化思想是用当前位置负梯度方向作为搜索方向，因为该方向为当前位置的最快下降方向，所以也被称为是”最速下降法“。最速下降法越接近目标值，步长越小，前进越慢。(The gradient descent method is the earliest and most simple and most commonly used optimization method. The gradient descent method is simple to realize. When the objective function is a convex function, the solution of the gradient descent method is a global solution. In general, the solution is not guaranteed to be the global optimal solution, and the gradient descent method is not necessarily the fastest. The optimization idea of gradient descent method is to use the current position negative gradient direction as the search direction, because the direction is the fastest descending direction of the current position, so it is also called the steepest descent method. The faster the slowest descent approach is closer to the target, the smaller the step, the slower the progress.)

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)

isual Basic is a high level programming language that can be used to develop useful business software, stimulating educational programs,cutting-edge engineering applications, amusing games, entertaining multimedia programs and many other practical applications. Some of the VB sample codes created by us are calculator, Library System, Stop Watch and more.

说明：  这是书上的代码，C/C++中调用Matlab引擎的数值仿真的实现，供大家参考 (This is the code book, C/C++ Calling Matlab Engine Numerical Simulation for reference)

pso 算法的matlab实现， pso 算法的的matlab实现。 ，经测试可直接使用。 (pso algorithm matlab realize pso algorithm matlab realize. Has been tested and can be used directly.)

： 正交频分复用( O F D M) 是第四代移动通信的核心技术。 该文首先简要介绍了O F D M基本原理， 重点研究了理想同步情 况下， 保护时隙( c P )和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对O F D M系统性能的影响。 在给出O F DM系 统模型的基础上， 用 MAT L A B语言实现了整个系统的计算机仿真并给出参考设计程序。 最后给出在不同的信道条件下， 保 护时隙、 信道估计方法对 OF DM系统误码率影响的比较曲线， 得出了较理想的结论。 关键词： 正交频分复用； 仿真； 循环前缀； 信道估计(good)

利用matlab模拟光纤中EH11模的模式分布图。(Using matlab simulation mode fiber EH11 mode maps.)

附件是齿轮箱故障数据，txt格式文件，pdf格式的齿轮箱故障数据介绍，和word关于齿轮箱故障的知识详解，对研究旋转机械故障诊断的朋友有帮助(the attachment is the fault data of gear box in txt documents, and data instruction in pdf document. Also, the detailed intruction of gear box is in word documents.)

差分脉冲编码调制（）的matlab模块仿真，实现抽样，量化，预测，编码并解码(DPCM)

离散迭代，对于离散系统，进行多次迭代，得到最终的准确结果(Discrete iteration)