A Parameter-Optimized DBN Using GOA and Its Application in Fault Diagnosis of Gearbox

Table 5

Iteration process.

Number of iterations	Batch size	Learning rate	Comprehensive distance	RMSE
1	20	0.3166	2.9238	0.01945
2	20	0.1067	2.9233	0.01945
3	25	0.1067	2.9250	0.01944
4	25	0.1067	2.9267	0.01941
…
28	25	0.1068	2.9676	0.01926
29	25	0.1068	2.9793	0.01925
30	25	0.1068	2.9837	0.01922
31	25	0.1712	5.0172	0.00880
…
97	25	0.1712	5.1849	0.007640
98	25	0.1712	5.1862	0.007635
99	25	0.1711	5.1893	0.007563
100	25	0.1711	5.1982	0.007431