diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 1637c11..3e23e9f 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,9 +2,8 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="be5bf74e-ad1c-4197-8a1f-ac93566d8aa7" name="Default" comment="init">
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/推荐/DIN.md" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/README.md" afterPath="$PROJECT_DIR$/README.md" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/推荐/DIN.md" afterPath="$PROJECT_DIR$/推荐/DIN.md" />
     </list>
     <ignored path="Reflection_Summary.iws" />
     <ignored path=".idea/workspace.xml" />
@@ -29,8 +28,8 @@
         <entry file="file://$PROJECT_DIR$/README.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
             <state split_layout="SPLIT">
-              <first_editor relative-caret-position="120">
-                <caret line="348" column="16" selection-start-line="348" selection-start-column="16" selection-end-line="348" selection-end-column="16" />
+              <first_editor relative-caret-position="3504">
+                <caret line="350" column="6" selection-start-line="350" selection-start-column="6" selection-end-line="350" selection-end-column="6" />
                 <folding />
               </first_editor>
               <second_editor />
@@ -53,8 +52,8 @@
         <entry file="file://$PROJECT_DIR$/推荐/DIN.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
             <state split_layout="SPLIT">
-              <first_editor relative-caret-position="135">
-                <caret line="9" column="11" selection-start-line="9" selection-start-column="2" selection-end-line="9" selection-end-column="11" />
+              <first_editor relative-caret-position="15">
+                <caret line="1" column="12" selection-start-line="1" selection-start-column="12" selection-end-line="1" selection-end-column="12" />
                 <folding />
               </first_editor>
               <second_editor />
@@ -279,7 +278,7 @@
   <component name="PropertiesComponent">
     <property name="settings.editor.selected.configurable" value="editor.preferences.import" />
     <property name="settings.editor.splitter.proportion" value="0.2" />
-    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$/../LeetCode" />
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="js-jscs-nodeInterpreter" value="$USER_HOME$/.nvm/versions/node/v9.2.0/bin/node" />
   </component>
@@ -1200,8 +1199,8 @@
     <entry file="file://$PROJECT_DIR$/推荐/DIN.md">
       <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
         <state split_layout="SPLIT">
-          <first_editor relative-caret-position="135">
-            <caret line="9" column="11" selection-start-line="9" selection-start-column="2" selection-end-line="9" selection-end-column="11" />
+          <first_editor relative-caret-position="15">
+            <caret line="1" column="12" selection-start-line="1" selection-start-column="12" selection-end-line="1" selection-end-column="12" />
             <folding />
           </first_editor>
           <second_editor />
@@ -1222,8 +1221,8 @@
     <entry file="file://$PROJECT_DIR$/README.md">
       <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
         <state split_layout="SPLIT">
-          <first_editor relative-caret-position="120">
-            <caret line="348" column="16" selection-start-line="348" selection-start-column="16" selection-end-line="348" selection-end-column="16" />
+          <first_editor relative-caret-position="3504">
+            <caret line="350" column="6" selection-start-line="350" selection-start-column="6" selection-end-line="350" selection-end-column="6" />
             <folding />
           </first_editor>
           <second_editor />
diff --git a/README.md b/README.md
index 1ed0842..a5fae6f 100644
--- a/README.md
+++ b/README.md
@@ -347,6 +347,7 @@
     - [主要使用了什么机制](推荐/DIN.md#L164)
     - [activation unit的作用](推荐/DIN.md#L164)
     - [DICE怎么设计的](推荐/DIN.md#L164)
+    - [DICE使用的过程中，有什么需要注意的地方](推荐/DIN.md#L164)
 - DeepFM
     - [DNN与DeepFM之间的区别](推荐/DeepFM.md#L164)
     - [Wide&Deep与DeepFM之间的区别](推荐/DeepFM.md#L164)
diff --git "a/\346\216\250\350\215\220/DIN.md" "b/\346\216\250\350\215\220/DIN.md"
index bbe52c6..98fc79d 100644
--- "a/\346\216\250\350\215\220/DIN.md"
+++ "b/\346\216\250\350\215\220/DIN.md"
@@ -8,5 +8,10 @@ Attention机制，针对不同的广告，用户历史行为与该广告的权
 - activation unit在这种思路上，认为面对不同的对象Va兴趣的权重Wi应该也是变换而不是固定的，所以用了g(ViVa)来动态刻画不同目标下的历史行为的不同重要性
 
 # DICE怎么设计的
-- x_p=tf.sigmoid(tf.layers.batch_normalization(x, center=False, scale=False))
-- aplha*(1-x_p)*x+x_p*x
\ No newline at end of file
+- 先对input数据进行bn，在进行sigmoid归一化到0-1，再进行一个加权平衡alpha*(1-x_p)`*`x+x_p`*`x
+    - x_p=tf.sigmoid(tf.layers.batch_normalization(x, center=False, scale=False,training=True))
+    - aplha*(1-x_p)*x+x_p*x
+
+# DICE使用的过程中，有什么需要注意的地方
+- 在用batch_normalization的时候，需要设置traning=True，否则在做test的时候，获取不到training过程中的各batch的期望
+- test的时候，方差计算利用的是期望的无偏估计计算方法:E(u^2)`*`m/(m-1)
\ No newline at end of file