Table 7: The iteration history recor.

Number of iterationResidual square sumParameters

0.1602098.0611.0001.0001.0001.000
1.11.755.988.918.838−.132
2.1.160.869.703−.370.058
3.1.141.880.799−.404.056
4.1.1403.691.396−.606.085
5.1.13713.094−.951−1.280.181
6.1.13438.175−4.560−3.105.444
7.1.13343.424−5.301−3.463.494
8.1.13338.177−4.547−3.081.440
9.1.13338.172−4.546−3.081.440
10.1.13338.177−4.546−3.081.440
11.1.13338.177−4.546−3.081.440

number of primary iterations is shown on the left side of the decimal, and the number of secondary iterations is shown on the right side of the decimal. model stops running after 13 iterations and the optimal solution has been found.