train loss 下降缓慢，但是val loss 和准确率几乎不变，这是为什么

Question

Epoch 1/100
172/172 223s 1s/step - loss: 1.1671 - accuracy: 0.4960 - val_loss: 0.7501 - val_accuracy: 0.5349
Epoch 2/100
172/172 - 238s 1s/step - loss: 1.1031 - accuracy: 0.5018 - val_loss: 0.7826 - val_accuracy: 0.4651
Epoch 3/100
172/172 - 219s 1s/step - loss: 1.0325 - accuracy: 0.5058 - val_loss: 0.8168 - val_accuracy: 0.4651
Epoch 4/100
172/172- 236s 1s/step - loss: 1.0100 - accuracy: 0.4971 - val_loss: 0.7344 - val_accuracy: 0.4651
Epoch 5/100
172/172- 223s 1s/step - loss: 0.9718 - accuracy: 0.4989 - val_loss: 0.6938 - val_accuracy: 0.4651
Epoch 6/100
172/172- 232s 1s/step - loss: 0.9460 - accuracy: 0.4924 - val_loss: 0.6952 - val_accuracy: 0.5349
Epoch 7/100
172/172 - 231s 1s/step - loss: 0.9244 - accuracy: 0.5091 - val_loss: 0.6909 - val_accuracy: 0.5349
Epoch 8/100
172/172- 229s 1s/step - loss: 0.9101 - accuracy: 0.4956 - val_loss: 0.7005 - val_accuracy: 0.4651
Epoch 9/100
172/172- 231s 1s/step - loss: 0.8831 - accuracy: 0.4902 - val_loss: 0.6930 - val_accuracy: 0.5349
Epoch 10/100
172/172 - 230s 1s/step - loss: 0.8817 - accuracy: 0.4884 - val_loss: 0.6968 - val_accuracy: 0.5349
Epoch 11/100
172/172 296s 2s/step - loss: 0.8320 - accuracy: 0.5007 - val_loss: 0.7000 - val_accuracy: 0.4651
Epoch 12/100
172/172 - 262s 2s/step - loss: 0.8211 - accuracy: 0.4945 - val_loss: 0.6966 - val_accuracy: 0.4651
Epoch 13/100
172/172 - ETA: 0s - loss: 0.8163 - accuracy: 0.4876

Answer 1

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