Merge pull request #513 from peterzhang2029/nested_fix

Fix shared parameters in nested text classification .

nested_sequence/text_classification/network_conf.py

@@ -15,11 +15,13 @@ def cnn_cov_group(group_input, hidden_size):
     conv4 = paddle.networks.sequence_conv_pool(
         input=group_input, context_len=4, hidden_size=hidden_size)
 
+    fc_param_attr = paddle.attr.ParamAttr(name='_cov_value_weight')
+    fc_bias_attr = paddle.attr.ParamAttr(name='_cov_value_bias')
     linear_proj = paddle.layer.fc(
         input=[conv3, conv4],
         size=hidden_size,
-        param_attr=paddle.attr.ParamAttr(name='_cov_value_weight'),
-        bias_attr=paddle.attr.ParamAttr(name='_cov_value_bias'),
+        param_attr=[fc_param_attr, fc_param_attr],
+        bias_attr=fc_bias_attr,
         act=paddle.activation.Linear())
 
     return linear_proj