Table 2 Loss function diagram of different number of test sets when the epoch was 50,000

Number of test sets

1

2

3

4

5

   Train loss

4.13e−3

4.18e−3

1.63e−3

2.61e−3

2.12e−3

   Test loss

5.14e−3

8.97e−3

6.08e−3

3.77e−3

5.15e−3

Number of test sets

6

7

8

9

10

   Train loss

2.45e−3

2.62e−3

4.18e−3

2.78e−3

3.86e−3

   Test loss

7.46e−3

8.02e−3

4.89e−3

8.52e−3

5.69e−3