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北京石油化工学院2026年研究生招生接收调剂公告
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du2667193

至尊木虫 (著名写手)

[求助] lingo软件求助 已有1人参与

MODEL:
SETS:
CAN/1..10/: P, X;
ENDSETS
DATA:
A = 3.78765;
B = 0.18211;
C = 0.22951;
D = 40.13350;
E = 2.17707;
F = 0.72639;
M = 3.03211;
N = 37.34250;
Y = 0.2;
P = 0.1, 0.2, 0.3, 0.4, 0.5,
    0.6, 0.7, 0.8, 0.9, 1.0;
ENDDATA
@FOR(CAN(I): A*@LOG(1 + B*P(I)*Y/X(I)) + C*@LOG(1 + D*P(I)*Y/X(I)) - E*@LOG(1 + F*P(I)*(1 - Y)/(1 - X(I))) - M*@LOG(1 + N*P(I)*(1 - Y)/(1 - X(I)))= 0);
@FOR(CAN(I): @BND(0, X(I), 1));
END




上面的代码输入lingo软件里,运行不出来,可以帮我看看是什么问题吗?
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dingd

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【答案】应助回帖

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du2667193: 金币+50, ★★★★★最佳答案 2019-01-11 20:35:03
是想解一组10元方程组吗?1stOpt更简单好用:
CODE:
Constant A=3.78765,B=0.18211,C=0.22951,D=40.13350,E=2.17707,
         F=0.72639,M=3.03211,N=37.34250,Y=0.2;
Constant P=[0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0];
Parameter x(10)=[0,1];
Function For(i=1:10,x,P)(A*Ln(1+B*P*Y/X)+C*Ln(1+D*P*Y/X)-E*Ln(1+F*P*(1-Y)/(1-X))-M*Ln(1+N*P*(1-Y)/(1-X))=0);

结果:
x1: 0.00296170954100013
x2: 0.00297103467287497
x3: 0.00301947424335091
x4: 0.0030590936916319
x5: 0.00308777662506828
x6: 0.00310745200535569
x7: 0.00312012439044301
x8: 0.00312739354743777
x9: 0.00313047686473734
x10: 0.00313029598444686
2楼2019-01-11 17:09:23
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