cross entropy loss,crossentropy

解析损失函数之categorical_crossentropy loss与 hinge loss
交叉熵损失 cross entropy loss
2019:把 cross entropy 梯度分布拉 '平',就能轻松超越 focal loss(附
而cross entropy的值落差很大,有助于模型选择最佳梯度,找到最优解.
plot(range(10),w['categorical_crossentropy']['val_loss'],label='