- Getting a conceptual understanding of multi-layer neural networks
- Training neural networks for image classification
- Implementing the powerful backpropagation algorithm
- Debugging neural network implementations
multi-layer perceptron (MLP)
MLP learning procedure
为了应对多分类，用one-hot representation
计算过程
- 计算第一层的输出
- 计算错误，最小化损失函数
- 反向传播错误，推导出权重，更新模型