download.nos.org_srsec315new_History-Book_L01

优秀论文及配套源码。电压暂降是动态电能质量问题中最受关注的热点之一。大量新型电力电子设备的广泛使用对电网电能质量的要求越来越高，而且电压暂降在电网中又具有一定的传播性。因此，无论从电网还是用户都迫切需要对电压暂降进行研究和治理。对电压暂降的检测是解决电压暂降的前提条件，故本论文主要对电压暂降的检测方法进行研究。 本文分析了国内外短时电能质量扰动检测的研究现状，并着重讨论了短路故障、感应电动机启动和变压器激磁三种电压暂降扰动情况下电压暂降的特性；在此基础上选择了基于S变换的短时电能质量扰动检测方法，从S变换的结果S模矩阵及S复矩阵中提取出所需数据并以此来对各种扰动情况下的电压暂降的幅值、相位跳变、持续时间和谐波含量进行分析。仿真结果表明，该方法很好地实现了对电压暂降各特征量的检测。 (The voltage sag is one of most hot topics in dynamic electric energy problems. Masses of new power and electron facilities have been put into use widely, requiring a high quality of electric network and power, chiefly the voltage sag. Moreover, the voltage sag can spread in the electric network. So people have every reason to research and control the voltage sag. However, before developing the voltage sag, people have to detect it. On account of the above, this essay will chiefly focus on the detect methods of the voltage sags. In this paper, the status of the short duration power quality disturbance based on the different method are researched firstly, and emphasizes the characteristic of the voltage sag under the situation of the three kinds of voltage sag disturbances like the short circuit fault, induction motor start-up and transformer excitation. On the basis of the above, the short duration power quality disturbance detection method based on S transform is chosen. The complex m)

this program simulates 2D electromagnetic Maxwell equations in transverse magnetic mode , by using finite difference time domain method FDTD

it s a matlab code.for genetic algorithm.

这个程序是用来计算盘基片的厚度和折射分布的程序.(this file is used to calculate the thickness and the refractive index of thse sample, and these two parameter distribution ca nbe obtained.)

Am FM modulation Generator using 512 points in Ms Excel

对摄像的标定进行模拟，来分析误差对结果的影响，来确定标定的对最后结果的影响。(To simulate camera calibration to analyze the impact of the error on the results to determine the impact on the final outcome of the calibration.)

Soft Focus using Guassian Blur

说明：  genetic algoritm for matlab

用matlab编写的smith圆图软件 解压之后包括两个文件 直接运行.m即可(Prepared by using matlab software smith circle diagram extract directly after the operation, including two documents. M can)

本程序实现矢量图像的方向扩散 如果启用程序中两条被注释掉的语句则表明带有边缘停止函数的方向扩散(This procedure to achieve the direction of the proliferation of vector graphics to enable the program if the two are commented out with a statement that indicates the direction of the edge to stop the proliferation of the function)