fix bug for SGD

Author: dalinvip

Config/config.py

@@ -277,7 +277,7 @@ def Adadelta(self):
         return self._config.getboolean("Optimizer", "Adadelta")
 
     @property
-    def optim_momentum_value(self):
+    def momentum_value(self):
         return self._config.getfloat("Optimizer", "optim_momentum_value")
 
     @property