# Can someone explain me what does this loss curve says?

I was training a CNN model on TensorFlow. After a while I came back and saw this loss curve:

The green curve is training loss and the gray one is validation loss. I know that before epoch 394 the model in heavily overfitted, but I have no idea what happened after that.

Also, this is accuracy curves if it helps:

I'm using categorical cross-entropy and this is the model I am using:

and here is link to PhysioNet's challenge which I am working on: https://physionet.org/content/challenge-2017/1.0.0/

• Maybe you should provide a little bit of context, i.e. which task you are trying to solve with CNNs (i.e. which dataset), which loss function you are using, maybe you should do plot_model(your_model) and report the architecture of your model. – nbro Dec 14 '20 at 10:22
• I'm trying to classify ECG signals in PhysioNet 2017 challenge. My output is four classes and I'm using categorical cross-entropy as loss function. – Sepehr Golestanian Dec 14 '20 at 10:35
• Please, edit your post to include these details (maybe also a link to the challenge). – nbro Dec 14 '20 at 10:39
• I've edited the question. – Sepehr Golestanian Dec 14 '20 at 10:59
• Why are you using a CNN to classify ECG signals? Aren't ECG signals just numerical time series? – nbro Dec 14 '20 at 11:08