DDE-1/Time-series-analysis-II.md

@@ -151,3 +151,21 @@ Is there an alternative way? In principle, you can do anything you want for thes
 
 _RNN graph representation. Herein, both the first and second RNN layers only connects the final time step results. In order to use the second RNN layer, we duplicate the output (blue nodes) and pass it to the second layer. This is nothing but a simple trick to use the same RNN interface in TF. 
 </div>
+
+### Building an Autoencoder with RNN layers
+
+...
+
+## Special Recurrent Cells
+
+### LSTM
+
+...
+
+### GRU
+
+...
+
+## Additional references
+
+...
\ No newline at end of file