Codes

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.)

时间计算器：分别输入开始日期和结束日期，能计算两个日期相差几天。(Time Calculator: Enter the start and end dates, it can calculate how many days they are difference.)

有关可变码长的LDPC编码电路的设计与实现和一些相关的英文资料以及文献(LDPC)

Plot the voltage eficience based on real power

％ If only 1 output is specified, then dataout (a matrix the same size as ％ data) is returned. The order of t and align is immaterial, as long as ％ the data matrix is input first.( If only 1 output is specified, then dataout (a matrix the same size as data) is returned. The order of t and align is immaterial, as long as the data matrix is input first.)

压缩传感置信传播算法的matlab仿真全部源程序。信号模式为二值高斯信号，编码测量采用类似LDPC矩阵。(Belief propagation algorithm for compressed sensing all the source code matlab simulation. Gaussian signal model for binary signals, LDPC coding was measured using a similar matrix.)

Simulates DBPSK modulation.

这个是matlab经典教程的一个关于特殊函数的计算的原代码，请大家赶快下载哦，谢谢，(This is a classic tutorial matlab a special function on the calculation of the original code, please download as soon as possible Oh, Thank you,)

为了过滤有色噪声，利用广义最小二乘进行系统模型的辨识(In order to filter colored noise, using generalized least squares models were recognition system)

基于matlab的相场法计算纯金属镍的微观模拟(Microscopic simulation of pure metal nickel by phase field method based on MATLAB)