function C=bace(s)
s=(0:0.01:27.66);
for i=1:size(s,2)
if s(i)<8.02;
C(i)=0.36*s(i);
else
C(i)=4.1*10^(-5)*(s(i)-8.02).^4+2.85;
end
end
function dy = rid(s,y)
dy = zeros(6,1);
dy(1)=-9.8*cos(y(1))/y(5);
dy(2)=cos(y(1));
dy(3)=sin(y(1));
dy(4)=1/y(5);
dy(5)= -294*sin(y(1))/(y(5)*(30+y(6)))-0.6125*y(5)*(4.44+C(i))/(30+y(6))-y(6)/(30+y(6));
dy(6)=1.19*y(5)*C(i)^0.5*0.36/y(5);
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function C=bace(s)
s=(0:0.01:27.66);
for i=1:size(s,2)
if s(i)<8.02; C(i)=0.36*s(i);
else C(i)=4.1*10^(-5)*(s(i)-8.02).^4+2.85;
end
end
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