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AR3_P36
autoregresive model grade3
- 2011-04-20 23:07:22下载
- 积分:1
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MATLAB
一、 牛顿-拉夫逊法概要
首先对一般的牛顿-拉夫逊法作一简单说明。已知一个变量X的函数
(4-6)
解此方程式时,由适当的近似值X(0)出发,根据 (4-7)
反复进行计算,当X(n)满足适当的收敛判定条件时就是(4-6)式的根。这样的方法就是所谓的牛顿-拉夫逊法。
式(4-7)就是取第n次近似解X(n)在曲线 上的点 处的切线与X轴的交点作下一次X(n+1)值的方法。参考图4-2(a)。在这一方法中为了能收敛于真解,初值X(0)的选取及函数f(X)必须满足适当的条件,如图4-2(b)所示的那种情况就不能收敛或收敛到别的根上去。
这一方法还可以做下面的解释,设第n次迭代得到的解与真值之差,即 的误差为 时,则
(4-8)
把 在 附近对 用泰勒级数展开
(4-9)
上式略去 以下的项
(4-10)
的误差可近似由上式计算出来
图4-2
(4-11)
比较式(4-7)和(4-11),可以看出牛顿-拉夫逊法的修正量和 的误差的一次项相等。
用同样的方法考虑,给出对n个变量 (:Because of the importance and complexity of power system, better algorithm and programme language
is very important . An interior point method based on the perturbed Karush2Kuhn2Tucker (KKT) condition is pre2
sented in this paper , where the method and process for the optimal power flow is treated through the Matlab’s
symbolic math toolbox and Mfunction is also presented. Using the symbolic code , it can improve the adaptability
of the programme dramatically. The advantage is that , what we need to do is change the model expression. We
can make use of the symbolic programme to check our programme while we write the Mfunctions. Using the Mat2
lab , we find the optimal solutions and calculate quickly and efficiently. It has proposed the powerful and unique
functions of Matlab in the optimization and calculation for power system.
Key words :power system symbolic calculation optimal power flow interior point method)
- 2020-07-08 16:38:56下载
- 积分:1
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Balanced_relay
mobile user location matlab coding
- 2014-09-10 06:16:13下载
- 积分:1
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570486690TDIDF_Demo
TFIDF计算方法详细解释,代码解释很多,也有帮助文档(TFIDF calculation method explained in detail, explain a lot of code, but also help documentation)
- 2015-04-03 10:18:35下载
- 积分:1
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MATLAB-R2008
在MATLAB 环境下一些图像处理的例子,MATLAB R2008数字图像处理与分析实例教程源程序.(Some examples in MATLAB environment for image processing, MATLAB R2008 digital image processing and analysis tutorial examples source.)
- 2014-10-27 16:26:52下载
- 积分:1
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fowardpathsimulat
前向链路的信道路径仿真 为通信事业做出点小小事情(Forward link channel simulation for the communications path to point the cause of small things)
- 2008-05-26 12:08:25下载
- 积分:1
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cc
说明: 基于AT89S51和CC1100射频识别阅读器的设计与研究(Based on AT89S51 and CC1100 radio frequency identification readers, Design and Research)
- 2010-03-30 17:15:23下载
- 积分:1
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Swarm-Tracking
国外著名控制专著《extremum seeking control and application》输出跟踪控制案例源码,采用matlab编写,对研究极值搜索控制理论非常有帮助(a well-known book about system control 《extremum seeking control and application》output tracking control matlab code, it will benefit to study the extremum seeking control theory for people)
- 2013-09-15 14:55:19下载
- 积分:1
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work
用 来 生 成 fir 中 的 hn 表 达 式(to create the hn in the fir fliter)
- 2011-12-24 15:04:56下载
- 积分:1
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EVM
运用误差矢量幅值法(EVM)对信号的载噪比进行估计(Method using error vector magnitude (EVM) of the carrier signal-to-noise ratio estimate)
- 2020-12-03 03:29:26下载
- 积分:1