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birdcanfly

½ð³æ (ÕýʽдÊÖ)

[ÇóÖú] ΢·Ö·½³Ìode45Çó½â£¬×îС¶þ³Ë·¨ÓÅ»¯Î¢·Ö·½³Ì²ÎÊý£¬³ÌÐòÔËÐÐÇóÖú ÒÑÓÐ1È˲ÎÓë

·ÂÕÕÏÂÃæµÄÌû×Ó£¨http://muchong.com/bbs/viewthread.php?tid=6425538&authorid=1122189£©½øÐÐÁ˳ÌÐ޸ģ¬Çó½â΢·Ö·½³Ì×éµÄϵÊý£¬Î¢·Ö·½³Ì×éÖаüº¬ÁËָǰϵÊýºÍ»î»¯ÄÜ¡£
ÏÖÔÚÔËÐгÌÐò£¬matlabÅÜÆðÀ´Ã»Í꣬ÎÞ½á¹û£¬ÎÞ±¨´í¡£ÇëÇó¸ßÊÖÖ¸µã£¬Ð­Öúµ÷ͨ³ÌÐò£¬50½ð±ÒÏàл£¡
***********************
³ÌÐò´úÂëÈçÏ£º

function k1k2k3
format long
clear all
clc

k0 = [1e40 1e20 1e40 1e30 100e3 50e3 100e3 100e3 0.8];
lb = [0 0 0 0 0 0 0 0 0];
ub = [inf inf inf inf inf inf inf inf 1];

data=...
    [
0.00    100.000 0.00000 0.00000 0.00000  
0.21        78.8686        18.802        1.99667        0
0.22        59.2346        37.9368        2.66223        0.332779
0.23        48.0865        46.7554        4.49251        0.166389
0.24        37.1048        57.0715        5.32446        0.665557
0.25        29.6173        61.2313        8.31947        0.831947
0.253        31.1148        59.5674        9.65058        0.831947
0.258        29.7837        61.2313        7.8203        0.998336
0.26        22.629        63.3943        12.3128        1.16473
0.263        24.792        60.3993        13.4775        1.33111
0.266        21.9634        62.396        13.9767        1.4975
0.27        21.2978        63.228        13.1448        1.83028
0.272        24.6256        59.0682        14.3095        1.66389
0.277        17.3045        58.4027        21.1314        3.1614
0.28        17.4709        58.7354        20.9651        2.82862
0.29        23.7937        49.9168        22.4626        3.32779
0.3        18.3028        43.7604        31.1148        6.48918
];
x0=data(1,2:end);
tspan=data(:,1)';
yexp = [data(2:end,2) data(2:end,3) data(2:end,4) data(2:end,5)];

[k,resnorm,residual,exitflag,output,lambda,jacobian] =lsqnonlin(@ObjFunc,k0,lb,ub,[],tspan,x0,yexp);
ci = nlparci(k,residual,jacobian);
fprintf('\n\nʹÓú¯Êýlsqnonlin()¹À¼ÆµÃµ½µÄ²ÎÊýֵΪ:\n')
fprintf('\tk1 = %.9f ¡À %.9f\n',k(1),ci(1,2)-k(1))
fprintf('\tk2 = %.9f ¡À %.9f\n',k(2),ci(2,2)-k(2))
fprintf('\tk3 = %.9f ¡À %.9f\n',k(3),ci(3,2)-k(3))
fprintf('\tk4 = %.9f ¡À %.9f\n',k(4),ci(4,2)-k(4))
fprintf('\tEa1 = %.9f ¡À %.9f\n',k(5),ci(5,2)-k(5))
fprintf('\tEa2 = %.9f ¡À %.9f\n',k(6),ci(6,2)-k(6))
fprintf('\tEa3 = %.9f ¡À %.9f\n',k(7),ci(7,2)-k(7))
fprintf('\tEa4 = %.9f ¡À %.9f\n',k(8),ci(8,2)-k(8))
fprintf('\ta  = %.9f ¡À %.9f\n',k(9),ci(9,2)-k(9))
fprintf('  The sum of the squares is: %.9e\n\n',resnorm)

ts=0(max(tspan)-min(tspan))/100):max(tspan);
[ts ys] = ode45(@KineticsEqs,ts,x0,[],k);
yy = [data(:,2) data(:,3) data(:,4)];
I100=100*ones(16,1);
plot(ts,ys(:,1),'b',tspan,yy(:,1),'bo');
hold on
plot(ts,ys(:,2)+ys(:,3),'r',tspan,yy(:,2),'r*');
plot(ts,ys(:,4),'k',tspan,yy(:,3),'k+');
plot(ts,I100(:,1)-ys(:,1)-ys(:,2)-ys(:,3)-ys(:,4),'g',tspan,yy(:,4),'g<')
legend('C1µÄ¼ÆËãÖµ','C1µÄʵÑéÖµ','C2µÄ¼ÆËãÖµ*5','C2µÄʵÑéÖµ*5','C3µÄ¼ÆËãÖµ*5','C3µÄʵÑéÖµ*5','C4µÄ¼ÆËãÖµ','C4µÄʵÑéÖµ')

function f = ObjFunc(k,tspan,x0,yexp)           % Ä¿±êº¯Êý
[t Xsim] = ode45(@KineticsEqs,tspan,x0,[],k);% Çó½â³£Î¢·Ö·½³Ì£¬ÆäÖÐtspanΪtµÄȡֵµã£¬x0Ϊ΢·Ö·½³Ì×éµÄ³õʼֵ£¬kΪ΢·Ö·½³ÌµÄϵÊý£¬·µ»ØtΪ΢·Ö·½³Ì×é½âµÄȡֵµã£¬XsimΪ΢·Ö·½³Ì×éµÄ½â
Xsim1=Xsim(:,1);%ÌáÈ¡XsimµÄµÚÒ»ÁÐ
Xsim2=Xsim(:,2);%ÌáÈ¡XsimµÄµÚ¶þÁÐ
Xsim3=Xsim(:,3);%ÌáÈ¡XsimµÄµÚÈýÁÐ
Xsim4=Xsim(:,4);%ÌáÈ¡XsimµÄµÚËÄÁÐ

ysim(:,1) = Xsim1(2:end);%΢·Ö·½³ÌµÄµÚÒ»¸ö±äÁ¿£¬´ÓµÚ¶þ¸ö½âµ½×îºóÒ»¸ö½â¸³Öµ¸øysimµÄµÚÒ»ÁÐ
ysim(:,2) = Xsim2(2:end);%΢·Ö·½³ÌµÄµÚ¶þ¸ö±äÁ¿£¬´ÓµÚ¶þ¸ö½âµ½×îºóÒ»¸ö½â¸³Öµ¸øysimµÄµÚ¶þÁÐ
ysim(:,3) = Xsim3(2:end);%΢·Ö·½³ÌµÄµÚÈý¸ö±äÁ¿£¬´ÓµÚ¶þ¸ö½âµ½×îºóÒ»¸ö½â¸³Öµ¸øysimµÄµÚÈýÁÐ
ysim(:,4) = Xsim4(2:end);%΢·Ö·½³ÌµÄµÚËĸö±äÁ¿£¬´ÓµÚ¶þ¸ö½âµ½×îºóÒ»¸ö½â¸³Öµ¸øysimµÄµÚËÄÁÐ

I100=100*ones(16,1);
f = [(ysim(:,1)-yexp(:,1)) (ysim(:,2)+ysim(:,3)-yexp(:,2)) (ysim(:,4)-yexp(:,3)) (I100-ysim(:,1)-ysim(:,2)-ysim(:,3)-ysim(:,4)-yexp(:,4))];%ÐγÉÄ¿±êÓÅ»¯º¯Êý

function dCdt = KineticsEqs(t,C,k)              % ODEÄ£ÐÍ·½³Ì£¬CΪŨ¶È£¬kΪ΢·Ö·½³ÌÖеÄϵÊý£¬tΪµ¼Êý
a=k(9);
Ea1=k(5);
Ea2=k(6);
Ea3=k(7);
Ea4=k(8);
R=8.314;
Ttime=(-960.5*t^2+842.1*t+56.66+273.15);
dC1dt =-k(1)*exp(-Ea1/(R*Ttime))*C(1);%µÚÒ»¸ö΢·Ö·½³Ì£¬µÈºÅÇ°ÃæÊÇC(1)¶ÔtµÄ΢·Ö
dC2dt =k(1)*exp(-Ea1/(R*Ttime))*a*C(1)-k(2)*exp(-Ea2/(R*Ttime))*C(2);%µÚ¶þ¸ö΢·Ö·½³Ì£¬µÈºÅÇ°ÃæÊÇC(2)¶ÔtµÄ΢·Ö
dC3dt =k(2)*exp(-Ea2/(R*Ttime))*C(2)-k(3)*exp(-Ea3/(R*Ttime))*C(3);%µÚÈý¸ö΢·Ö·½³Ì£¬µÈºÅÇ°ÃæÊÇC(3)¶ÔtµÄ΢·Ö
dC4dt =k(3)*exp(-Ea3/(R*Ttime))*C(3)-k(4)*exp(-Ea4/(R*Ttime))*C(4);%µÚËĸö΢·Ö·½³Ì£¬µÈºÅÇ°ÃæÊÇC(4)¶ÔtµÄ΢·Ö
dCdt = [dC1dt; dC2dt;dC3dt;dC4dt];%΢·Ö·½³Ì×é
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whqs8426212

Í­³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

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Á½¸ö±ß½çÖµ·¶Î§ËõС£¬ÊÔÊÔ

[ ·¢×ÔСľ³æ¿Í»§¶Ë ]
5Â¥2014-09-20 18:18:39
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 6 ¸ö»Ø´ð

dikeway

гæ (СÓÐÃûÆø)

°ï¶¥Ò»Ï£¬ÎÒµÄҲû»Ø¸´ÄØ
2Â¥2014-09-18 22:12:01
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

birdcanfly

½ð³æ (ÕýʽдÊÖ)

¿ÉÒÔ˳ÀûÔËÐУ¬Çó³öÁ˲ÎÊý£¬¿ÉÒԺܺõÄÄâºÏÎÄÏ×ÖеÄÊý¾Ý£¬µ«ÊDzÎÊýºÍÎÄÏ×±¨µÀµÄ²ÎÊý²îºÃ¼¸¸öÊýÁ¿¼¶¡£
*********************
function k1k2k3
format short e
clear all
clc
k0 = [1.0 1.0 1.0 1.0 139 59 169 100 0.8];
lb = [0 0 0 0 0 0  0 0 0];
ub = [inf inf inf inf inf inf inf inf 1];

data=...
    [
0.21        78.8686        18.802        1.99667        0
0.22        59.2346        37.9368        2.66223        0.332779
0.23        48.0865        46.7554        4.49251        0.166389
0.24        37.1048        57.0715        5.32446        0.665557
0.25        29.6173        61.2313        8.31947        0.831947
0.253        31.1148        59.5674        9.65058        0.831947
0.258        29.7837        61.2313        7.8203        0.998336
0.26        22.629        63.3943        12.3128        1.16473
0.263        24.792        60.3993        13.4775        1.33111
0.266        21.9634        62.396        13.9767        1.4975
0.27        21.2978        63.228        13.1448        1.83028
0.272        24.6256        59.0682        14.3095        1.66389
0.277        17.3045        58.4027        21.1314        3.1614
0.28        17.4709        58.7354        20.9651        2.82862
0.29        23.7937        49.9168        22.4626        3.32779
0.3        18.3028        43.7604        31.1148        6.48918
];
x0=data(1,2:end);
tspan=data(:,1);
yexp = [data(2:end,2) data(2:end,3) data(2:end,4) data(2:end,5)];

[k,resnorm,residual,exitflag,output,lambda,jacobian] =lsqnonlin(@ObjFunc,k0,lb,ub,[],tspan,x0,yexp);
ci = nlparci(k,residual,jacobian);
fprintf('\n\nʹÓú¯Êýlsqnonlin()¹À¼ÆµÃµ½µÄ²ÎÊýֵΪ:\n')
fprintf('\tk1 = %e ¡À %e\n',k(1),ci(1,2)-k(1))
fprintf('\tk2 = %e ¡À %e\n',k(2),ci(2,2)-k(2))
fprintf('\tk3 = %e ¡À %e\n',k(3),ci(3,2)-k(3))
fprintf('\tk4 = %e ¡À %e\n',k(4),ci(4,2)-k(4))
fprintf('\tEa1 = %e ¡À %e\n',k(5),ci(5,2)-k(5))
fprintf('\tEa2 = %e ¡À %e\n',k(6),ci(6,2)-k(6))
fprintf('\tEa3 = %e ¡À %e\n',k(7),ci(7,2)-k(7))
fprintf('\tEa4 = %e ¡À %e\n',k(8),ci(8,2)-k(8))
fprintf('\ta  = %f ¡À %f\n',k(9),ci(9,2)-k(9))

ts=0.210(max(tspan)-min(tspan))/100):max(tspan);
[ts ys] = ode45(@KineticsEqs,ts,x0,[],k);
yy = [data(:,2) data(:,3) data(:,4) data(:,5)];
I100=100*ones(101,1);
plot(ts,ys(:,1),'b',tspan,yy(:,1),'bo');
hold on
plot(ts,ys(:,2)+ys(:,3),'r',tspan,yy(:,2),'r*');
plot(ts,ys(:,4),'k',tspan,yy(:,3),'k+');
plot(ts,I100-ys(:,1)-ys(:,2)-ys(:,3)-ys(:,4),'g',tspan,yy(:,4),'g<')
legend('C1µÄ¼ÆËãÖµ','C1µÄʵÑéÖµ','C2µÄ¼ÆËãÖµ','C2µÄʵÑéÖµ','C3µÄ¼ÆËãÖµ','C3µÄʵÑéÖµ','C4µÄ¼ÆËãÖµ','C4µÄʵÑéÖµ')


function f = ObjFunc(k0,tspan,x0,yexp)           % Ä¿±êº¯Êý
[t Xsim] = ode45(@KineticsEqs,tspan,x0,[],k0);% Çó½â³£Î¢·Ö·½³Ì£¬ÆäÖÐtspanΪtµÄȡֵµã£¬x0Ϊ΢·Ö·½³Ì×éµÄ³õʼֵ£¬kΪ΢·Ö·½³ÌµÄϵÊý£¬·µ»ØtΪ΢·Ö·½³Ì×é½âµÄȡֵµã£¬XsimΪ΢·Ö·½³Ì×éµÄ½â
Xsim1=Xsim(:,1);%ÌáÈ¡XsimµÄµÚÒ»ÁÐ
Xsim2=Xsim(:,2);%ÌáÈ¡XsimµÄµÚ¶þÁÐ
Xsim3=Xsim(:,3);%ÌáÈ¡XsimµÄµÚÈýÁÐ
Xsim4=Xsim(:,4);%ÌáÈ¡XsimµÄµÚËÄÁÐ

ysim(:,1) = Xsim1(2:end);%΢·Ö·½³ÌµÄµÚÒ»¸ö±äÁ¿£¬´ÓµÚ¶þ¸ö½âµ½×îºóÒ»¸ö½â¸³Öµ¸øysimµÄµÚÒ»ÁÐ
ysim(:,2) = Xsim2(2:end);%΢·Ö·½³ÌµÄµÚ¶þ¸ö±äÁ¿£¬´ÓµÚ¶þ¸ö½âµ½×îºóÒ»¸ö½â¸³Öµ¸øysimµÄµÚ¶þÁÐ
ysim(:,3) = Xsim3(2:end);%΢·Ö·½³ÌµÄµÚÈý¸ö±äÁ¿£¬´ÓµÚ¶þ¸ö½âµ½×îºóÒ»¸ö½â¸³Öµ¸øysimµÄµÚÈýÁÐ
ysim(:,4) = Xsim4(2:end);%΢·Ö·½³ÌµÄµÚËĸö±äÁ¿£¬´ÓµÚ¶þ¸ö½âµ½×îºóÒ»¸ö½â¸³Öµ¸øysimµÄµÚËÄÁÐ

I100=100*ones(15,1);
f = [(ysim(:,1)-yexp(:,1)) (ysim(:,2)+ysim(:,3)-yexp(:,2)) (ysim(:,4)-yexp(:,3)) (I100-ysim(:,1)-ysim(:,2)-ysim(:,3)-ysim(:,4)-yexp(:,4))];%ÐγÉÄ¿±êÓÅ»¯º¯Êý

function dCdt = KineticsEqs(t,C,k)              % ODEÄ£ÐÍ·½³Ì£¬CΪŨ¶È£¬kΪ΢·Ö·½³ÌÖеÄϵÊý£¬tΪµ¼Êý
a=k(9);
Ea1=k(5);
Ea2=k(6);
Ea3=k(7);
Ea4=k(8);
R=8.314;
Ttime=(-960.5*t^2+842.1*t+56.66+273.15);
dC1dt =-k(1)*exp(-Ea1/(R*Ttime))*C(1);%µÚÒ»¸ö΢·Ö·½³Ì£¬µÈºÅÇ°ÃæÊÇC(1)¶ÔtµÄ΢·Ö
dC2dt =k(1)*exp(-Ea1/(R*Ttime))*a*C(1)-k(2)*exp(-Ea2/(R*Ttime))*C(2);%µÚ¶þ¸ö΢·Ö·½³Ì£¬µÈºÅÇ°ÃæÊÇC(2)¶ÔtµÄ΢·Ö
dC3dt =k(2)*exp(-Ea2/(R*Ttime))*C(2)-k(3)*exp(-Ea3/(R*Ttime))*C(3);%µÚÈý¸ö΢·Ö·½³Ì£¬µÈºÅÇ°ÃæÊÇC(3)¶ÔtµÄ΢·Ö
dC4dt =k(3)*exp(-Ea3/(R*Ttime))*C(3)-k(4)*exp(-Ea4/(R*Ttime))*C(4);%µÚËĸö΢·Ö·½³Ì£¬µÈºÅÇ°ÃæÊÇC(4)¶ÔtµÄ΢·Ö
dCdt = [dC1dt; dC2dt;dC3dt;dC4dt];%΢·Ö·½³Ì×é
3Â¥2014-09-19 13:17:46
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

birdcanfly

½ð³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
3Â¥: Originally posted by birdcanfly at 2014-09-19 13:17:46
¿ÉÒÔ˳ÀûÔËÐУ¬Çó³öÁ˲ÎÊý£¬¿ÉÒԺܺõÄÄâºÏÎÄÏ×ÖеÄÊý¾Ý£¬µ«ÊDzÎÊýºÍÎÄÏ×±¨µÀµÄ²ÎÊý²îºÃ¼¸¸öÊýÁ¿¼¶¡£
*********************
function k1k2k3
format short e
clear all
clc
k0 = ;
lb = ;
ub = ;

data= ...

½«²ÎÊýµÄ³õʼֵÉ趨ΪÎÄÏ×Öб¨µÀµÄÊýÖµ£¬±¨´íÈçÏ£º

Local minimum possible.

lsqnonlin stopped because the size of the current step is less than
the default value of the step size tolerance.

<stopping criteria details>

Warning: Matrix is singular to working precision.
> In nlparci at 104
  In ODEParmafit_non_test at 33
4Â¥2014-09-19 13:22:20
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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[¿¼ÑÐ] 295¸´ÊÔµ÷¼Á +7 ¼òľChuFront 2026-03-19 7/350 2026-03-20 14:11 by ÐÇ¿ÕÐÇÔÂ
[¿¼ÑÐ] ±¾ÈË¿¼085602 »¯Ñ§¹¤³Ì ר˶ +18 ²»ÖªµÀ½Ðʲô£¡ 2026-03-15 20/1000 2026-03-20 13:52 by danney002
[¿¼ÑÐ] ²ÄÁÏר˶ӢһÊý¶þ306 +6 z1z2z3879 2026-03-18 6/300 2026-03-20 08:49 by xingguangj
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