Merge pull request #543 from PaddlePaddle/updateCTRImage

Update the CTR image and description.

ctr/README.cn.md

@@ -146,8 +146,8 @@ Wide & Deep Learning Model\[[3](#参考文献)\] 可以作为一种相对成熟
 Figure 2. Wide & Deep Model
 </p>
 
-模型左边的 Wide 部分，可以容纳大规模系数特征，并且对一些特定的信息（比如 ID）有一定的记忆能力；
-而模型右边的 Deep 部分，能够学习特征间的隐含关系，在相同数量的特征下有更好的学习和推导能力。
+模型上边的 Wide 部分，可以容纳大规模系数特征，并且对一些特定的信息（比如 ID）有一定的记忆能力；
+而模型下边的 Deep 部分，能够学习特征间的隐含关系，在相同数量的特征下有更好的学习和推导能力。
 
 
 ### 编写模型输入

ctr/README.md

@@ -120,7 +120,7 @@ The model structure is as follows:
 Figure 2. Wide & Deep Model
 </p>
 
-The wide part of the left side of the model can accommodate large-scale coefficient features and has some memory for some specific information (such as ID); and the Deep part of the right side of the model can learn the implicit relationship between features.
+The wide part of the top side of the model can accommodate large-scale coefficient features and has some memory for some specific information (such as ID); and the Deep part of the bottom side of the model can learn the implicit relationship between features.
 
 
 ### Model Input