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当代科学前沿论丛 Logistic回归模型——方法与应用_10448185

当代科学前沿论丛 Logistic回归模型——方法与应用_10448185

2011-06-01

Logistic回归模型——方法与应用附例题数据和源码

Logistic回归模型——方法与应用附例题数据和源码

2011-06-01

qwt-6.0.0插件

qwt-6.0.0qwt-6.0.0qwt-qwt-6.0.06.0.0qwt-6.0.qwt-6.0.00

2011-06-01

qwt-5.2.1插件

qwt-5.2.1插件qwt-5.2.1插件qwt-5.2.1插件qwt-5.2.1插件qwt-5.2.1插件

2011-06-01

IEEE5节点图及其数据

IEEE5节点图及其数据 IEEIEEE5IEEE5节点图及其数据节点图及其数据E5节点图及其数据

2011-05-21

IEEE9节点数据IEEE9节点数据

IEEE9节点数据IEEE9节点数据IEEE9节点数据IEEE9节点数据IEEE9节点数据IEEE9节点数据IEEE9节点数据

2011-05-20

C++潮流计算程序C++潮流计算程序

#include #include #include #include using namespace std; //节点号 类型 负荷有功 负荷无功母线数据(类型 1=PV节点,2=PQ节点,3=平衡节点) struct BUS { int busno; int type; float Pd; float Qd; }; //发电机数据 节点号 有功发电 电压幅值 struct Generator { int busno; float Pg; float Vg; };

2011-05-20

C语言P ,Q分解法潮流就算

P ,Q分解法潮流就算 P ,Q分解法潮流就算 P ,Q分解法潮流就算

2011-05-20

matlab暂态稳定计算

%本程序是用分段计算法计算电力系统的暂态稳定。 S0=input('请输入初始功率:S0='); V0=input('请输入无限大系统母线电压:V0='); B=input('请输入系统等值电抗矩阵:B='); Tj=input('请输入惯性时间常数:Tj='); N=input('请输入时段数:N='); Ni=input('请输入哪个时段切除故障:Ni=');

2011-05-15

matlab命令大全

1、特殊变量与常数 ans 计算结果的变量名 computer 确定运行的计算机 eps 浮点相对精度 Inf 无穷大 I 虚数单位 inputname 输入参数名 NaN 非数

2011-05-01

visual+c++完全自学手册代码

#include <iostream> using namespace std; int main() { cout<<"Hello,C++!"; cin.get(); return 0; }

2011-05-01

MATLAB数值分析与应用配书盘

%多项式拟合 x=-3:0.5:3; y=sin(x)+x; %进行数据拟合 p3=polyfit(x,y,3); %给出表达式 vpa(poly2sym(p3),10) x1=-3:0.1:3; %采样点 y1=polyval(p3,x1);%计算采样点的拟合结果 plot(x,y,x,y,'*',x1,y1) grid

2011-05-01

系统辨识与自适应控制matlab仿真 代码

%白噪声及有色噪声序列的产生 clear all; close all; L=500; %仿真长度 d=[1 -1.5 0.7 0.1]; c=[1 0.5 0.2]; %D、C多项式的系数(可用roots命令求其根) nd=length(d)-1; nc=length(c)-1; %nd、nc为D、C的阶次 xik=zeros(nc,1); %白噪声初值,相当于ξ(k-1)...ξ(k-nc) ek=zeros(nd,1); %有色噪声初值 xi=randn(L,1); %randn产生均值为0,方差为1的高斯随机序列(白噪声序列) for k=1:L e(k)=-d(2:nd+1)*ek+c*[xi(k);xik]; %产生有色噪声 %数据更新 for i=nd:-1:2 ek(i)=ek(i-1); end ek(1)=e(k); for i=nc:-1:2 xik(i)=xik(i-1); end xik(1)=xi(k); end subplot(2,1,1); plot(xi); xlabel('k'); ylabel('噪声幅值'); title('白噪声序列'); subplot(2,1,2); plot(e); xlabel('k'); ylabel('噪声幅值'); title('有色噪声序列');

2011-04-28

牛顿法 直角坐标潮流计算程序

n=input('请输入节点数:n='); nl=input('请输入支路数:nl='); isb=input('请输入平衡母线节点号:isb='); pr=input('请输入误差精度:pr='); B1=input('请输入由各支路参数形成的矩阵:B1='); B2=input('请输入各节点参数形成的矩阵:B2='); Y=zeros(n); e=zeros(1,n);f=zeros(1,n);V=zeros(1,n); O=zeros(1,n);S1=zeros(nl); for i=1:nl

2011-04-27

电力系统潮流计算程序

clc %说明:为了使节点按照先PQ,再PV节点,最后平衡节点的次序编号,以便与公式对照,节点1与节点5对调。 %节点阻抗矩阵 Z=[0,0.04+0.12i,0,0.08+0.24i,0;0.04+0.12i,0,0.06+0.18i,0.06+0.18i,0.02+0.06i;0,0.06+0.18i,0,0.01+0.03i,0.08+0.24i;0.08+0.24i,0.06+0.18i,0.01+0.03i,0,0;0,0.02+0.06i,0.08+0.24i,0,0]; %求互导纳

2011-04-27

MATLAB语言常用算法程序集》一书的源程序.rar

本书附带光盘中包括了全书所有实例对应的MATLAB的M文件。所有代码按照章节存放在各个文件夹下,如“第4章 插值”文件夹下存放了本书第4章所有的算法程序代码,对于算法的程序代码,在光盘中存为同函数名的M文件,例如,Language.m表示求已知数据点的拉格朗日插值多项式的程序,依此类推。 读者可以通过运行光盘提供的代码文件,体会本书所有实例的效果。由于所有代码都是在MATLAB 7(R14)下编写并调试通过,因此,使用本光盘中实例前,读者需要安装MATLAB 7(R14),并将包含待运行.m文件的文件夹添加到MATLAB 路径或设置为MATLAB当前目录。如读者需要运行Language.m,那么就需要将包含此M文件的“第4章 插值”文件夹添加到MATLAB路径,或者将其设置为MATLAB当前目录,然后通过命令窗口调用文件名,或者在M-Editor窗口打开并运行代码文件等方式来运行此M文件。

2011-04-27

系统辨识与MATLAB仿真程序

例2.1 用乘同余法产生随机数 (见光盘 FLch2sjxleg1.m) ①编程如下: A=6; N=100; %初始化; x0=1; M=255; for k=1:N %乘同余法递推100次; x2=A*x0; %x2和x0分别表示xi和xi-1; x1=mod (x2,M); %将x2存储器的数除以M,取余数放x1(xi)中; v1=x1/256; %将x1存储器的数除以256得到小于1的随机数放v1中; v(:,k)=v1; % 将v1中的数( )存放在矩阵存储器v的第k列中,v(:,k) %表示行不变、列随递推循环次数变化; x0=x1; %xi-1= xi; v0=v1; end %递推100次结束; v2=v %该语句末无‘;’,实现矩阵存储器v中随机数放在v2中,%且可直接显示在MATLAB的window中; k1=k; %grapher %以下是绘图程序; k=1:k1; plot(k,v,k,v,'r'); xlabel('k'), ylabel('v');tktle('(0-1)均匀分布的随机序列') ② 程序运行结果如图2.5所示。

2011-04-27

PSAT电力系统仿真工具

PSAT is a Matlab toolbox for static and dynamic analysis and control of electric power systems.

2011-04-02

Power System Modelling and Scripting

Part I contains introductory concepts. Chapter 1 provides the motivation of the book, some philosophical foundations of the art of modelling physical systems and defines the general mathematical model used for describing the behavior of power systems. Chapter 2 introduces the structure and the features of a software package for power system analysis while Chapter 3 discusses on the concept of scripting applied to power system analysis. The latter chapter also attempts to provide general guidelines for thinking power systems analysis in terms of computer programming. I hope that the results can be useful for Ph.D. students that, at the very end, will be the only readers of this book that have time to implement their own software applications.

2011-03-17

同步发电机组的建模同步发电机组的建模

同步发电机组的建模,同步发电机组的建模同步发电机组的建模

2011-03-17

Synchronized Phasor Measurements and Their Applications

同步相量测量技术和它的应用,Synchronized phasor measurements have become the measurement technique of choice for electric power systems. They provide positive sequence voltage and current measurements synchronized to within a microsecond. This has been made possible by the availability of Global Positioning System (GPS) and the sampled data processing techniques developed for computer relaying applications. In addition to positivesequences voltages and currents, these systems also measure local frequency and rate of change of frequency, and may be customized to measure harmonics, negative and zero sequence quantities, as well as individual phase voltages and currents. At present there are about 24 commercial manufacturers of phasor measurement units (PMUs), and industry standards developed in the Power System Relaying Committee of IEEE has made possible the interoperability of units from different manufacturers.

2011-03-17

QT4中文手册QT4中文手册

1.1从Hello Qt开始 差不多所有的程序教材都从Hello 开始,下面就是这个程序的qt 版本。 1 #include <QApplication> 2 #include <QLabel> 3 int main(int argc, char *argv[]) 4 { 5 QApplication app(argc, argv); 6 QLabel *label = new QLabel("Hello Qt!"); 7 label->show(); 8 return app.exec(); 9 } 按行解析以

2011-03-17

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