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fdtd1D
it is Finite Difference Time Domain algortihm
- 2009-02-27 21:39:32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
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psopt20100414
MATLAB蚁群算法源程序,和大家一起分享!和大家一起多多交流学习!(MATLAB source code ant colony algorithm, and to share with everyone! Learn more exchanges with everyone!)
- 2010-05-19 20:29:02下载
- 积分:1
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fit
D:matlab
mmfit.rar插值(D : Matlab nmm fit.rar interpolation)
- 2006-09-06 18:58:01下载
- 积分:1
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卷积神经网络去雾
说明: 该代码实现了使用Matlab实现卷积神经网络来对图像进行去雾操作。(This code implements a convolutional neural network using Matlab to defog the image.)
- 2021-04-19 15:08:51下载
- 积分:1
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ComputationoftheFundamentalMatrix
Another matlab routine for calculating the Fundamental Matrix.
- 2010-01-09 07:26:23下载
- 积分:1
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LS_Main
least squre identification method
- 2013-03-05 18:58:35下载
- 积分:1
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matrix
matlab中矩阵运算。文档内容含有各种矩阵运算,是我等码农辛苦整来的(matrix operation)
- 2014-11-14 16:39:20下载
- 积分:1
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uncode
不同调制方法,和不同编码方式的信道仿真比较(different modulation methods, coding and different forms of channel simulation comparison)
- 2007-05-21 15:46:10下载
- 积分:1
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extr
Extraire des maximas et minimas des signaux avec l axe temporel
- 2012-09-06 02:24:22下载
- 积分:1