Neural Networks Factory¶
Neural network factory provide convenient helper functions to define common neural networks.
-
MLP
(input, spec)¶ Construct a multi-layer perceptron. A MLP is a multi-layer neural network with fully connected layers.
Parameters: - input (SymbolicNode) – the input to the mlp.
- spec – the mlp specification, a list of hidden dimensions. For example,
[128, (512, :sigmoid), 10]
. The number in the list indicate the number of hidden units in each layer. A tuple could be used to specify the activation of each layer. Otherwise, the default activation will be used (except for the last layer). - hidden_activation (Base.Symbol) – keyword argument, default
:relu
, indicating the default activation for hidden layers. The specification here could be overwritten by layer-wise specification in thespec
argument. Also activation is not applied to the last, i.e. the prediction layer. SeeActivation()
for a list of supported activation types. - prefix – keyword argument, default
gensym()
, used as the prefix to name the constructed layers.
Returns: the constructed MLP.