zxymath_matlab_program

run length encoding in matlab

This paper discusses the impact of HVDC on Power System Stability and proposes a new control mechanism based on Fuzzy set theory to augment dynamic performance of a multi-machine power system. To have good damping characteristics over a wide range of operating conditions, deviations in speed and acceleration of the machines are chosen as the input signals to the fuzzy controller. These input signals are first characterized by a set of linguistic variables using fuzzy set notations .The fuzzy relation matrix allows a set of fuzzy logic operations that are performed on controller inputs to obtain the desired output. The effectiveness of the proposed controller is demonstrated by a multi-machine system example. The performance of this fuzzy controller, in comparison to the conventional fixed gain controller, demonstrates the efficacy of this new fuzzy PID controller. Index Terms—HVDC, Eliminated variable

MATLAB编写的图像直方图处理程序，对输入的图像首先显示它的图像与直方图，然后进行直方图均衡化处理，显示处理后的直方图与图像。(A MATLAB program for image histogram equalization. First input an image and display its histogram. Then equalize the histogram of the input image and display its equalized histogram .)

生成一个采样频率2000，由50Hz、120Hz、200Hz正弦信号以及噪声信号组成的数字信号，滤掉150Hz>f>100Hz的频率，计算并显示滤波前后的原始数据波形以及功率谱密度。(A sampling frequency of 2000, a digital signal composed of 50Hz, 120Hz, 200Hz sine and noise signals, is generated to filter out the frequency of 150Hz>f>100Hz and to calculate and display the original data waveforms and the power spectral density before and after the filtering.)

STATCOM 为一种快速可控的动态无功补偿设备(STATCOM is a fast and controllable dynamic reactive power compensation device)

基于pso_lssvm的预测程序，直接可用，可以出图，可以修改。加入了粒子变异、权值的递减策略（去掉%就行了）。注意：excel记得放对位置(Pso_lssvm based prediction program, directly available, you can map, you can modify. Added a particle mutation, weight reduction strategy (remove%))

自己编写的迭带的阈值设定的方法.可以直接调用..这种阈值方法比较适合背景与前景差别比较大的情况. (I have written again and again with the threshold settings. .. This can directly call methods suitable threshold background and the prospect of relatively large differences.)

说明：  此文件为贪婪算法的matlab源代码,适合参加数学建模的同学使用(This document is a greedy algorithm matlab source code, suitable for students to participate in the use of mathematical modeling)

包括了matlab灰色预测模型以及其他重要的绘图分析思路(Including matlab gray forecasting model and other important plot analysis of ideas)

源码给出了非线性规划（NLP）的梯度法，其中gradf.m为梯度法算法，下载设置参数既能运行。(Given nonlinear programming source (NLP) in the gradient method, which gradf.m as gradient algorithm, download the set parameters not only run.)