Hi, I am new in Pytorch and using DL in image segmentation.  However, the train_loss does not descend apparently and always fluctuate regularly and the test dice coefficient does not ascend apparently.
I wonder the problem is on the programming itself or the network structure or the data set or the hyper parameters. Could anyone give some advise and experiences ?

Screenshot from 2019-05-26 17-13-41.png351×539 24.4 KB