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bpmatlab
bp神经网路在地震预测中的应用,分别采用gd、gdx、lm训练方法,供大家参考~(bp neural network in the earthquake prediction, respectively, using gd, gdx, lm training methods for your reference ~)
- 2008-12-16 19:49:18下载
- 积分:1
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1921682911620073215
matlab图像处理程序,用形态学方法提取骨架线
- 2009-05-14 17:39:50下载
- 积分:1
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DTlab3
Digital communication labs,
- 2009-02-19 06:16:40下载
- 积分:1
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QAM256
256QAM,MATLAB环境下进行的256QAM调制(256QAM)
- 2010-11-22 08:59:18下载
- 积分:1
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cov2para
This MATLAB code computes the covariance matrix of a random variable
- 2009-12-16 16:44:44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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xianxingtiaopinxinhao
对线性调频信号的仿真分析,包括图像分析及实验程序(Linear FM signal simulation analysis, including image analysis and experimental procedures)
- 2012-05-16 21:20:06下载
- 积分:1
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The-design-and-implementation
构建基于MATLAB-SIMLINK系统中XPC目标的实时仿真测试系统(Constructed based the XPC target the MATLAB-SIMLINK system real-time simulation test system)
- 2013-04-26 10:58:55下载
- 积分:1
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MATLAB+communication
matlab是实现通信理论及应用的很有用的一个工具,本文会给你很多启发(matlab is to achieve communication theory and application of a very useful tool, this article will give you a lot of inspiration)
- 2008-07-04 11:57:39下载
- 积分:1
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dsc-single-sideband-modulation
说明: dsc单边带调制。功能是用10Hz的载波信号去调制频率为500Hz的基带信号,然后得到单边带调制信号(single-sideband modulation)
- 2011-04-01 10:15:56下载
- 积分:1