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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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using_matlab
help you to use matlab
- 2013-02-12 22:52:00下载
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uplod-1
Constant k filters, also k-type filters, are a type of electronic filter designed using the image method. They are the original and simplest filters produced by this methodology and consist of a ladder network of identical sections of passive components. Historically, they are the first filters that could approach the ideal filter frequency response to within any prescribed limit with the addition of a sufficient number of sections. However, they are rarely considered for a modern design, the principles behind them having been superseded by other methodologies which are more accurate in their prediction of filter response.A filter in which the product of the series and shunt impedances is a constant that is independent of frequency.
- 2015-02-27 14:48:18下载
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20161110matlab
自己编写的matlabanli，其中包含二维MUSIC和CAPON算法，及其改进算法，对研究有一定帮助(Own prepared matlabanli, which contains two-dimensional MUSIC and CAPON algorithm, and its improved algorithm, the study has some help)
- 2016-11-10 12:15:13下载
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xihua
自己编写和收集的指纹细化方法集合，对学习指纹的人来说是福音。(I have written and collected by refining methods of fingerprint collection of fingerprints of people studying for the Gospel.)
- 2009-03-22 08:49:48下载
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Graph-Algorithms
图论算法及Matlab程序代码含注释 很详尽(Graph Algorithms and Matlab code with comment)
- 2012-03-29 21:20:42下载
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activlev
tool of matlab to processing speech
- 2011-11-23 02:34:00下载
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xsk_rd1
关于SAR的一个仿真程序，采用RD算法编写的一个MATLAB源程序，通过仔细分析还可以很方便的将其扩展为用于实测数据的成像。(On the SAR of a simulation program, written by RD algorithm, a MATLAB source, through careful analysis also can easily be extended to the measured data for imaging.)
- 2010-10-25 15:52:29下载
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seat_VSVD
汽车座椅的模型，一个很好的变刚度变阻尼座椅模型。 本人编写，在simulink环境下使用(Car seat model, a good Damper seat models. I prepared, used under simulink environment)
- 2014-12-14 12:15:47下载
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ParticleMotion
C program to map particle movement over a vectored velocity field
- 2015-03-12 07:28:29下载
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