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Update comments of maxout_layer #2771

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Jul 7, 2017
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Update comments of maxout_layer #2771

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14 changes: 11 additions & 3 deletions python/paddle/trainer_config_helpers/layers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1253,9 +1253,9 @@ def pooling_layer(input,

If stride > 0, this layer slides a window whose size is determined by stride,
and return the pooling value of the window as the output. Thus, a long sequence
will be shorten.
The parameter stride specifies the intervals at which to apply the pooling
will be shorten.

The parameter stride specifies the intervals at which to apply the pooling
operation. Note that for sequence with sub-sequence, the default value
of stride is -1.

Expand Down Expand Up @@ -4805,6 +4805,14 @@ def maxout_layer(input, groups, num_channels=None, name=None, layer_attr=None):
So groups should be larger than 1, and the num of channels should be able
to devided by groups.

.. math::
y_{si+j} = \max_k x_{gsi + sk + j}
g = groups
s = input.size / num_channels
0 \le i < num_channels / groups
0 \le j < s
0 \le k < groups

Please refer to Paper:
- Maxout Networks: http://www.jmlr.org/proceedings/papers/v28/goodfellow13.pdf
- Multi-digit Number Recognition from Street View \
Expand Down