[systemml] branch gh-pages updated: [SYSTEMML-540] Added zero padding layer in Caffe2DML, Keras2DML and nn library

[ni...@apache.org]

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The following commit(s) were added to refs/heads/gh-pages by this push:
     new eda02d0  [SYSTEMML-540] Added zero padding layer in Caffe2DML, Keras2DML and nn library
eda02d0 is described below

commit eda02d00f8ae826b488f98c0193d515f65f68686
Author: Niketan Pansare <np...@us.ibm.com>
AuthorDate: Fri Mar 22 17:57:51 2019 -0700

    [SYSTEMML-540] Added zero padding layer in Caffe2DML, Keras2DML and nn library
    
    - Updated the tests and the documentation.
    - This layer is required for ResNet-50 demo with Keras2DML.
---
 beginners-guide-keras2dml.md |  6 +++++-
 reference-guide-caffe2dml.md | 30 ++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/beginners-guide-keras2dml.md b/beginners-guide-keras2dml.md
index 60de360..4517be5 100644
--- a/beginners-guide-keras2dml.md
+++ b/beginners-guide-keras2dml.md
@@ -161,12 +161,16 @@ sysml_model.fit(features, labels)
 
 #### What optimizer and loss does Keras2DML use by default if `keras_model` is not compiled ?
 
-If the user does not `compile` the keras model, then we use cross entropy loss and SGD optimizer with nesterov momentum:
+If the user does not `compile` the keras model, then we throw an error.
+
+For classification applications, you can consider using cross entropy loss and SGD optimizer with nesterov momentum:
 
 ```python 
 keras_model.compile(loss='categorical_crossentropy', optimizer=keras.optimizers.SGD(lr=0.01, momentum=0.95, decay=5e-4, nesterov=True))
 ```
 
+Please refer to [Keras's documentation](https://keras.io/losses/) for more detail.
+
 #### What is the learning rate schedule used ?
 
 Keras2DML does not support the `LearningRateScheduler` callback. 
diff --git a/reference-guide-caffe2dml.md b/reference-guide-caffe2dml.md
index 8e2ed1f..381b96d 100644
--- a/reference-guide-caffe2dml.md
+++ b/reference-guide-caffe2dml.md
@@ -139,6 +139,36 @@ layer {
 }
 ```
 
+### Padding Layer
+
+Invokes [nn/layers/zero_pad2d.dml](https://github.com/apache/systemml/blob/master/scripts/nn/layers/zero_pad2d.dml) layer.
+ 
+**Optional Parameters:**
+
+- top_pad: Padding for top side (default: 0).
+- bottom_pad: Padding for bottom side (default: 0).
+- left_pad: Padding for left side (default: 0).
+- right_pad: Padding for right side (default: 0).
+- right_pad: Padding for right side (default: 0).
+- pad_value: value to use for padding (default: 0). Only zero padding supported for now.
+
+**Sample Usage:**
+```
+layer {
+  name: "padding1"
+  type: "Padding"
+  bottom: "pool1"
+  top: "padding1"
+  padding_param  {
+    top_pad = 1
+    bottom_pad = 1
+    left_pad = 1
+    right_pad = 1
+    pad_value = 0
+  }
+}
+```
+
 
 ### Deconvolution Layer