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## 問題分類
| 問題類型 | 啟動函數 | 損失函數 | 範例 |
|:--------------:|:--------:|:------------------------------------------------------------------------------:|:------------------------------------------------------------------:|
| 二元分類 | sigmoid | binary_crossentropy（二元交叉熵） | |
| 單標籤多元分類 | softmax | [[categorical_crossentropy]]（分類交叉熵）<br> sparse_categorical_crossentropy | 範例：[[An example that use categorical_crossentropy and softmax]] |
| 多標籤分類 | sigmoid | binary_crossentropy | |
| 回歸求值 | None | mse（均方誤差） | |
| 回歸求0~1值 | sigmoid | mse或binary_crossentropy | |
## Callback
- [ReduceLROnPlateau](https://keras.io/api/callbacks/reduce_lr_on_plateau/)