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xiaofenger01

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[ÇóÖú] Matlab ode45µÄÔËÓÃ

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function Cha5demo4
T = 220;  
R = 8.315;
k0 = [5.78052E+10 3.92317E+12 1.64254E+4 6.264E+8];
Ea = [124670 150386 77954 111528];
C0 = [1 0 0 0 0];
tspan = [0:1:300];
[t,C] = ode45(@MassEquations,tspan,C0,[],k0,Ea,R,T)
plot(t,C(:,1),'r-',t,C(:,2),'k:',t,C(:,3),'b-.',t,C(:,4),'k--');

function dCdt = MassEquations(t,C,k0,Ea,R,T)
k = k0.*exp(-Ea/(R*(T+273.15)));
rA = -(k(1)+k(2))*C(1);
rB = k(1)*C(1)-k(3)*C(2);
rC = k(2)*C(1)-k(4)*C(3);
rD = k(3)*C(2)-k(4)*C(4);
rE = k(4)*C(3);
dCdt = [rA; rB; rC; rD; rE];
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