代码搜索：微分几何
找到约 3,133 项符合「微分几何」的源代码
代码结果 3,133
www.eeworm.com/read/390194/8478040
txt 07-27.txt
例7-27 使用diff函数进行符号微分和求导。
解：在命令窗口中输入如下命令，并按Enter键确认。
>> syms x
>> diff(x^3+2*x^2+4*x+6)
ans =
3*x^2+4*x+4
>> diff(sin(x^3),4)
ans =
81*sin(x^3)*x^8-324*cos(x^3)*x^5-180*sin(x^3)*x^2
>>
www.eeworm.com/read/184067/9123598
m quadeg6.m
%微积分例6：刚性微分方程组（ode15s)
%需用模型函数quadeg6fun.m
clear;close;
[t,y]=ode45('quadeg6fun',[0,10],[2,1]');
plot(t,y);
text(1,1.1,'y1');
text(1,0.1,'y2');
pause
[t,y]=ode45('quadeg6fun',0,400,[2,1]')
www.eeworm.com/read/379469/9195059
asv ode45_solver.asv
%ode45执行函数
%解微分方程
clear all
%x=zeros(8,1);
ui=[5;-5;5;-5];
x0=[1;0;3e+7;6e+5;1;0;3e+7;6e+5];
[t,dxdt]=ode45(@valve_motor_pinion,[0 10],x0,[],ui);
%x=rk4(@valve_motor_pinion,0,10,x0,100);
subpl
www.eeworm.com/read/379469/9195066
m ode45_solver.m
%ode45执行函数
%解微分方程
clear all
ui=[5;-5;5;-5];
x0=[1;1;3e+7;6e+5;1;1;3e+7;6e+5];
[t,dxdt]=ode45(@valve_motor_pinion,[0 10],x0,[],ui);
%x=rk4(@valve_motor_pinion,0,10,x0,100);
figure;
subplot(2,2,
www.eeworm.com/read/166632/10010623
m naeuler.m
function [x,y]=naeuler(dyfun,xspan,y0,h)
%用途: Euler法解常微分方程 y'=f(x,y),y(x0)=y0
%格式: [x,y]=naeuler(dyfun,xspan,y0,h),dyfun为函数f(x,y)，xspan为求解区间[x0,xN]
% y0为初值y(x0)，h为步长
x=xspan(1):h:xspan(2);
y
www.eeworm.com/read/166306/10024393
m quadeg6.m
%微积分例6：刚性微分方程组（ode15s)
%需用模型函数quadeg6fun.m
clear;close;
[t,y]=ode45('quadeg6fun',[0,10],[2,1]');
plot(t,y);
text(1,1.1,'y1');
text(1,0.1,'y2');
pause
[t,y]=ode45('quadeg6fun',0,400,[2,1]')
www.eeworm.com/read/358694/10181598
m quadeg6.m
%微积分例6：刚性微分方程组（ode15s)
%需用模型函数quadeg6fun.m
clear;close;
[t,y]=ode45('quadeg6fun',[0,10],[2,1]');
plot(t,y);
text(1,1.1,'y1');
text(1,0.1,'y2');
pause
[t,y]=ode45('quadeg6fun',0,400,[2,1]')
www.eeworm.com/read/354498/10349247
m example.m
%用函数ode45()来解微分方程，并画图计算结果(注：ode45()采用龙格库塔算法求解)
%example.m
%初始化x1，x2,...,x22。x1即xD,x22即xB
[t,x]=ode45(@ivpodefun,[0 500],[0.55;0.545;0.54;0.535;0.53;0.525;0.52;0.515;0.51;0.505;0.5;0.495;0.49;0.485;
www.eeworm.com/read/425140/10379961
txt 新建 文本文档.txt
%编写同步发电机有阻尼绕组空在建立电压过程微分方程的M—函数
%将该M—函数定义为sy_ge_damp_noload_ode
function dydt=sy_ge_damp_noload_ode(t,y)
%下面输入电机基本参数
r=2.9069,Rfd=5.9013E-01,Rkd=11.900,Rkq=20.081;Ufd=24;w=377,L1=3.0892E-01,Lmd=3.2
www.eeworm.com/read/353896/10406789
m quadeg6.m
%微积分例6：刚性微分方程组（ode15s)
%需用模型函数quadeg6fun.m
clear;close;
[t,y]=ode45('quadeg6fun',[0,10],[2,1]');
plot(t,y);
text(1,1.1,'y1');
text(1,0.1,'y2');
pause
[t,y]=ode45('quadeg6fun',0,400,[2,1]')