Optimization of Bioactive Ingredient Extraction from Chinese Herbal Medicine Glycyrrhiza glabra: A Comparative Study of Three Optimization Models

Table 6

Effect of the number of hidden neurons of BPNN on the maximum absolute error, the determination coefficient, and the correlation coefficient for the training data and the testing data.

Hidden; neurons
1	29.5138	12.3344	0.7102	0.7102	0.6638
2	24.6360	7.4841	0.8532	0.9237	0.9464
3	6.9000	21.7254	0.9844	0.9924	0.9889
4	6.6441	14.0391	0.9905	0.9952	0.9448
5	5.0962	40.3892	0.9935	0.9968
6	4.7070	44.1666	0.9921	0.9963	0.7794
7	6.0375	23.0501	0.9923	0.9964
8	2.4151	16.9665	0.9985	0.9963
9	5.2294	14.8987	0.9953	0.9980

Note. and are the maximum absolute error of the training set and the testing set, respectively. is the determination coefficient of the training set. and are the correlation coefficient for the training data and the testing data, respectively.