roots-by-gauss-jordan

两种方法实现图像任意角度旋转，原图像的每个像素点寻找在新图的位置，新图中的每个像素点寻找原图中的位置(Two methods for image rotation of an arbitrary angle, each pixel of the original image at the position to find the new graph, the new image for each pixel to find the original position)

when SNR is high , 1st sample estimator provides good estimate of A. it has no noise effect . so we don’t need averaging effect to reduce noise when SNR is high. However variance is still low in sample mean estimator which shows that in reality ,sample mean is good estimator than 1st sample estimator. So, for high SNR, we do not need to reduce the effect of noise by averaging. or we can say that for high SNR let say >1000 , 1st sample estimator got reduced noise. But as for as variance is concerned , the sample mean has low variance for high SNR as well.

二次多项式拟合大地水准面，采用matlab编写的，关于拟合出来的图像感觉有些问题。。希望大家指正(Quadratic polynomial fitting geoid, using matlab prepared some questions about the fitting out of the picture feel. . I hope you correct)

Unified power flow controller load flow model

混沌初始化的PSO，在图像阈值分割方面的应用，自己写的(Chaos initialized PSO, the image threshold segmentation application, write your own)

这是用matlab编写人脸检测软件，是用的adaboost算法，参考价值还是很高的(using Matlab is prepared Face detection software is used adaboost algorithm, reference value or high)

基于最速下降法、牛顿法、共轭梯度法的matlab程序 (Steepest descent Newton conjugate gradient method)

Matlab实现史密斯圆图的绘制程序。 这个Matlab程序，绘制史密斯圆图，同时绘制反射系数。(Matlab Smith chart drawing program. The Matlab program to draw a Smith chart, draw the reflection coefficient.)

This paper presents a new synchronous-referenceframe (SRF)-based control method to compensate power-quality (PQ) problems through a three-phase four-wire unified PQ conditioner (UPQC) under unbalanced and distorted load conditions. The proposed UPQC system can improve the power quality at the point of common coupling on power distribution systems under unbalanced and distorted load conditions.

短时傅立叶变换与魏格纳威尔分部相结合的时频分析算法以及自适应短时傅立叶变换( U77ED u65F6 u5085 u7ACB u53F6 u53D8 u6362 u4E0E u9B4F u683C u7EB3 u5A01 u5C14 u5206 u90E8 u76F8 u7ED3 u5408 u7684 u65F6 u9891 u5206 u6790 u7B97 u6CD5 u4EE5 u53CA u81EA u9002 u5E94 u77ED u65F6 u5085 u7ACB u53F6 u53D8 u6362)