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1stOpt多参数约束拟合代码错误 已有1人参与
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 求助1stopt多参数非线性代码错误，去掉保证扩散系数大于0的两行代码可以运行，得出的解和文献结果相差甚远，加入两行约束条件程序报错，请大神指点如何加上约束条件能正常运行代码如下：Title "Nonlinear Fit for Defect diffusion coefficient"; Constant F=96485.334,R=8.3145,b3=0,d3=0;//法拉第常数F，R气体常数，文献中的两个参数设置为0; VarConstant T=[773.15,973.15,1073.15]; Parameters a1[0,1E-4],b1,c1,d1,a2[0,1E-4],b2,c2,d2,a3[0,1E-4],c3;//a1,a2,a3为参数预指数因子； Variables y,x1,x2,x3,x4;//y为离子导电率，x1,x2,x3为各离子浓度 Function y=(F^2)*x1*(a1*(1+b1*x4))*exp(-(c1+d1*x4)/(R*T))/(R*T)+(F^2)*x2*(a2*(1+b2*x4))*exp(-(c2+d2*x4)/(R*T))/(R*T)+(4*F^2)*x3*(a3*(1+b3*x4))*exp(-(c3+d3*x4)/(R*T))/(R*T); a1*(1+b1*x4)>0;//保证扩散系数大于0； a2*(1+b2*x4)>0;//保证扩散系数大于0； RowData; 119685.18,124330.77,127828.002,130751.07,132786.77; 4403.185,4851.994,5364.097,5588.501,5715.09; 214.3,185.53,151.007,116.483,87.71; 789.697,501.999,312.118,185.531,151.007; 0.0274,0.0174,0.0108,0.0064,0.0052; RowData; 50940.98,64564.546,69523.315,80276.015,84869.4,94160.57,97083.63,103764.92,106061.615,106374.8; 983.51,1362.565,1621.014,2160.885,2448.05,2993.664,3246.37,3694.35,3883.88,4205.5; 2034.532,1460.2,1236.21,914.587,822.694,627.422,564.246,472.353,437.893,409.176; 3441.642,2930.49,2706.499,2321.697,2068.992,1712.91,1586.554,1299.39,1173.04,1012.223; 0.119,0.1015,0.09375,0.0804,0.0717,0.05934,0.055,0.045,0.0406,0.0351; RowData; 25155.38,37004.228,41649.812,53864.044,58509.628,70097.488,74429.887,83460.067,88105.65; 593.555,791.372,940.732,1350.516,1509.876,2141.63,2397.74,2966.884,3251.455; 4071.022,3092.095,2682.312,1919.659,1669.236,1225.304,1065.944,815.521,752.915; 4674.315,4071.022,3757.993,3188.85,2932.735,2460.346,2204.231,1828.596,1669.236; 0.162,0.141,0.13,0.1105,0.1016,0.085,0.0764,0.063,0.0578; 程序报错： Incompatible types: 'Double' and 'Boolean' Incompatible types: 'Double' and 'Boolean' Compile failed, check your program codes please! |
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dingd
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感谢参与，应助指数 +1
独孤神宇: 金币+5, 鼓励交流 2021-03-08 18:56:47
感谢参与，应助指数 +1
独孤神宇: 金币+5, 鼓励交流 2021-03-08 18:56:47
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参考下： Root of Mean Square Error (RMSE): 1512.6424091951 Sum of Squared Residual: 54914089.394293 Correlation Coef. (R): 0.974780606831772 R-Square: 0.950197231455318 Adjusted R-Square: 1.17033437542122 Determination Coef. (DC): 0.950332931884681 F-Statistic: -35.7233854532568 Parameter Best Estimate -------------------- ------------- a1 3.00320288098963E-5 b1 -6.17282059059677 c1 5688.58025090443 d1 -127407.822744204 a2 4.67944748234004E-6 b2 13.236089621059 c2 -7474.57974538798 d2 963214.59538852 a3 1.04462488285875E-6 c3 -2496.32779108848 |
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唯有千寻2楼2021-03-08 17:11:55
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Cfdstudio2
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4楼2021-03-14 18:50:46
