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function dydt=fangcheng(t,y)
kf=200;
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q=y(1:N);c=y(N+1:2*N);
[ce1,ce2]=equilibrium(q1,q2);
%-----------¶¨Òådq/dt-----------------------------
for j=1:N
   dq1dt(j)=kf/p*(c1(j)-ce1(j));
   dq2dt(j)=kf/p*(c2(j)-ce2(j));
end
%---------¶¨ÒådC/dt-----------------------------------
dc1dt(1)=-u*(c1(1)-c0)/dz-(1-a)/a*p*dq1dt(1);
dc2dt(1)=-u*(c2(1)-c0)/dz-(1-a)/a*p*dq2dt(1);
for j=2:N
    dc1dt(j)=-u*(c1(j)-c1(j-1))/dz-(1-a)/a*p*dq1dt(j);
    dc2dt(j)=-u*(c2(j)-c2(j-1))/dz-(1-a)/a*p*dq2dt(j);
end
dydt=[dqdt dcdt]';
function [ce1,ce2]=equilibrium(q1,q2)
[ce1,ce2]=fzero('q1-0.45967ce1^0.3839/(ce1^0.0457+0.3*ce2^0.0003206',...
    'q2-0.17356*ce2^(-1.55201)/(ce2^(-2)+0.1*ce1^(-1))');
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function dydt=fangcheng(t,y)
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