Class: DNN::Layers::SimpleRNN_Dense

Inherits:
Object
  • Object
show all
Defined in:
lib/dnn/core/rnn_layers.rb

Instance Method Summary collapse

Constructor Details

#initialize(rnn) ⇒ SimpleRNN_Dense

Returns a new instance of SimpleRNN_Dense.



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# File 'lib/dnn/core/rnn_layers.rb', line 124

def initialize(rnn)
  @rnn = rnn
  @activation = rnn.activation.clone
end

Instance Method Details

#backward(dh2) ⇒ Object 



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# File 'lib/dnn/core/rnn_layers.rb', line 136

def backward(dh2)
  dh2 = @activation.backward(dh2)
  @rnn.grads[:weight] += @x.transpose.dot(dh2)
  @rnn.grads[:weight2] += @h.transpose.dot(dh2)
  if @rnn.l1_lambda > 0
    @rnn.grads[:weight] += dlasso
    @rnn.grads[:weight2] += dlasso2
  elsif @rnn.l2_lambda > 0
    @rnn.grads[:weight] += dridge
    @grads[:weight2] += dridge2
  end
  @rnn.grads[:bias] += dh2.sum(0)
  dx = dh2.dot(@rnn.params[:weight].transpose)
  dh = dh2.dot(@rnn.params[:weight2].transpose)
  [dx, dh]
end

#forward(x, h) ⇒ Object 



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# File 'lib/dnn/core/rnn_layers.rb', line 129

def forward(x, h)
  @x = x
  @h = h
  h2 = x.dot(@rnn.params[:weight]) + h.dot(@rnn.params[:weight2]) + @rnn.params[:bias]
  @activation.forward(h2)
end