change Architecure to Structure

image_classification/README.en.md

@@ -150,7 +150,7 @@ Figure 11. CIFAR10 dataset[21]
 
 After issuing a command `python train.py`, training will starting immediately. The details will be unpacked by the following sessions to see how it works.
 
-## Model Architecture
+## Model Structure
 
 ### Initialize PaddlePaddle
 

image_classification/index.en.html

@@ -192,7 +192,7 @@ Figure 11. CIFAR10 dataset[21]
 
 After issuing a command `python train.py`, training will starting immediately. The details will be unpacked by the following sessions to see how it works.
 
-## Model Architecture
+## Model Structure
 
 ### Initialize PaddlePaddle