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[ÇóÖú] matlab ÒÑÓÐ2È˲ÎÓë

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,k2=5.56E+13,k3=1.24E+11¡£±à¼­µÄmatlab³ÌÐòÈçÏ£¬¿É³öÏÖÁËЩÎÊÌ⣬ÎÒ²»ÖªµÀÔõô»ØÊ£¿Çó¸ßÈËÖ¸µã
function dd
x0 = [0.01  0.4  0.2]';
x = fsolve(@NonlinEqs,x0);
%               
function f = NonlinEqs(x);
tmp= 50 - 2*x(1) - x(2) - x(3);
f(1) =(51-x(1))*(x(1)-x(2))*(x(1)-x(3))*0.1/(3*(1-x(1))*tmp^2) -6.7;
f(2) = x(2)*(x(2)+x(3))/((x(1)-x(2))*tmp) -5.56E+13;
f(3) = x(3)*(x(2)+x(3))/((x(1)-x(3))*tmp) -1.24E+11;
¼ÆËã½á¹ûÈçÏ£º
>> dd

No solution found.

fsolve stopped because the relative size of the current step is less than the
default value of the step size tolerance squared, but the vector of function values
is not near zero as measured by the default value of the function tolerance.

<stopping criteria details>


fsolve stopped because the relative norm of the current step, 6.778107e-013, is less than
max(options.TolX^2,eps) = 1.000000e-012. However, the sum of squared function values,
r = 3.091375e+027, exceeds sqrt(options.TolFun) = 1.000000e-003.

Optimization Metric                                               Options
relative norm(step) =  6.78e-013                max(TolX^2,eps) =  1e-012 (default)
r =  3.09e+027                                    sqrt(TolFun) = 1.0e-003 (default)

ÎÒ²»ÖªµÀÉÏÃæËµµÄÊÇÔõô»ØÊ£¬Çó¸ßÈ˰ïÖú£¡£¡£¡£¡£¡£¡
matlab
CIYO$ZU85C~TZ2%NP599D0Q.jpg



[ Last edited by ThomsonW on 2014-3-10 at 21:00 ]
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