maple作图问题现在有一个微分方程组如下:diff(x,t) = x*(z/(0.7857142858+z)-0.1169737892-0.30599022e-1*y),diff(y,t) = y*(4*z/(0.75+z)-0.5),diff(z,t) = z*(1-z-x/(0.7857142858+z)-4*y/(0.75+z)).给定初值x0 = 0.4,y0 =0.1,z0 =0.1,请问
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 01:58:57
![maple作图问题现在有一个微分方程组如下:diff(x,t) = x*(z/(0.7857142858+z)-0.1169737892-0.30599022e-1*y),diff(y,t) = y*(4*z/(0.75+z)-0.5),diff(z,t) = z*(1-z-x/(0.7857142858+z)-4*y/(0.75+z)).给定初值x0 = 0.4,y0 =0.1,z0 =0.1,请问](/uploads/image/z/11450434-58-4.jpg?t=maple%E4%BD%9C%E5%9B%BE%E9%97%AE%E9%A2%98%E7%8E%B0%E5%9C%A8%E6%9C%89%E4%B8%80%E4%B8%AA%E5%BE%AE%E5%88%86%E6%96%B9%E7%A8%8B%E7%BB%84%E5%A6%82%E4%B8%8B%EF%BC%9Adiff%28x%2Ct%29+%3D+x%2A%28z%2F%280.7857142858%2Bz%29-0.1169737892-0.30599022e-1%2Ay%29%2Cdiff%28y%2Ct%29+%3D+y%2A%284%2Az%2F%280.75%2Bz%29-0.5%29%2Cdiff%28z%2Ct%29+%3D+z%2A%281-z-x%2F%280.7857142858%2Bz%29-4%2Ay%2F%280.75%2Bz%29%29.%E7%BB%99%E5%AE%9A%E5%88%9D%E5%80%BCx0+%3D+0.4%2Cy0+%3D0.1%2Cz0+%3D0.1%2C%E8%AF%B7%E9%97%AE)
maple作图问题现在有一个微分方程组如下:diff(x,t) = x*(z/(0.7857142858+z)-0.1169737892-0.30599022e-1*y),diff(y,t) = y*(4*z/(0.75+z)-0.5),diff(z,t) = z*(1-z-x/(0.7857142858+z)-4*y/(0.75+z)).给定初值x0 = 0.4,y0 =0.1,z0 =0.1,请问
maple作图问题
现在有一个微分方程组如下:diff(x,t) = x*(z/(0.7857142858+z)-0.1169737892-0.30599022e-1*y),diff(y,t) = y*(4*z/(0.75+z)-0.5),diff(z,t) = z*(1-z-x/(0.7857142858+z)-4*y/(0.75+z)).给定初值x0 = 0.4,y0 =0.1,z0 =0.1,请问作它的相图,最好用maple自带的命令.
maple作图问题现在有一个微分方程组如下:diff(x,t) = x*(z/(0.7857142858+z)-0.1169737892-0.30599022e-1*y),diff(y,t) = y*(4*z/(0.75+z)-0.5),diff(z,t) = z*(1-z-x/(0.7857142858+z)-4*y/(0.75+z)).给定初值x0 = 0.4,y0 =0.1,z0 =0.1,请问
restarte;
> eq:=
diff(x(t),t) = x(t)*(z(t)/(0.7857142858+z(t))-0.1169737892-0.30599022e-1*y(t)),
diff(y(t),t) = y(t)*(4*z(t)/(0.75+z(t))-0.5),
diff(z(t),t) = z(t)*(1-z(t)-x(t)/(0.7857142858+z(t))-4*y(t)/(0.75+z(t))),x(0) = 0.4,y(0) =0.1,z(0) =0.1;
> sss:= dsolve([eq],numeric):
> with(plots):odeplot(sss,[x(t),y(t),z(t)],t=0..30);
想要具体的t=0.01点数值,可以这样得到:
> sss(0.01);
[t = 0.01,x(t) = 0.399971436602128,y(t) = 0.0999705465997950,
z(t) = 0.0999778859911688]