lpfilter

涵盖了多种方法对多源图像进行图像融合的程序(Covers a wide range of multi-source image fusion process)

nginx源码分析，全面易懂。正在研究nginx的朋友可以看看。(nginx source code analysis, comprehensive and easy to understand.Studying nginx friends can see.)

灰色预测方法的特点表现在：首先是它把离散数据视为连续变量在其变化过程中所取的离散值，从而可利用微分方程式处理数据；而不直接使用原始数据而是由它产生累加生成数，对生成数列使用微分方程模型。这样，可以抵消大部分随机误差，显示出规律性。(The characteristics of the grey prediction method are as follows: First, it regards the discrete data as the discrete value of the continuous variable in its change process, so that the differential equation can be used to process the data; instead of using the original data directly, it generates the cumulative generation. Number, using a differential equation model for generating a series. In this way, most of the random errors can be offset, showing regularity.)

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.)

说明：  频率偏差估计由信道参数估计和频率偏差估计两部分组成 环路滤波器设计(Frequency offset is estimated by the channel parameter estimation and frequency offset is estimated that two-part loop filter design)

Delay routines, using a pre-computed loops_per_jiffy value.

Bi-directional sigmoid, one-way sigmoid, linear function, sign function implementation on Matlab

这个程序组是拉丁超立方模拟程序，是高级的monte carlo模拟随机抽样。(This program group is Latin hypercube simulation program, it is the senior monte carlo simulation of random sampling.)

Ezyfit is a tool that provides a better fitting to curves

matlab-simulink光伏发电模型(matlab-simulink PV model)