diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 278ea27..549ac90 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -47,7 +47,7 @@
         <counts>
           <entry key="Dockerfile" value="75" />
           <entry key="md" value="66" />
-          <entry key="py" value="1597" />
+          <entry key="py" value="1653" />
           <entry key="sh" value="5" />
         </counts>
       </usages-collector>
@@ -56,7 +56,7 @@
           <entry key="Bash" value="5" />
           <entry key="Dockerfile" value="75" />
           <entry key="Markdown" value="66" />
-          <entry key="Python" value="1597" />
+          <entry key="Python" value="1653" />
         </counts>
       </usages-collector>
     </session>
@@ -84,20 +84,20 @@
           </provider>
         </entry>
       </file>
-      <file pinned="false" current-in-tab="false">
+      <file pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/serve.py">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="47">
-              <caret line="239" selection-start-line="239" selection-end-line="246" selection-end-column="43" />
+            <state relative-caret-position="280">
+              <caret line="179" column="17" selection-start-line="179" selection-start-column="10" selection-end-line="179" selection-end-column="17" />
               <folding>
                 <element signature="e#18#46#0" expanded="true" />
-                <marker date="1588323423143" expanded="true" signature="5474:5476" ph="..." />
+                <marker date="1588323581632" expanded="true" signature="5474:5476" ph="..." />
               </folding>
             </state>
           </provider>
         </entry>
       </file>
-      <file pinned="false" current-in-tab="true">
+      <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/README.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
             <state split_layout="SPLIT">
@@ -168,8 +168,8 @@
         <option value="$PROJECT_DIR$/main.py" />
         <option value="$PROJECT_DIR$/Dockerfile" />
         <option value="$PROJECT_DIR$/bootstrap.sh" />
-        <option value="$PROJECT_DIR$/serve.py" />
         <option value="$PROJECT_DIR$/README.md" />
+        <option value="$PROJECT_DIR$/serve.py" />
       </list>
     </option>
   </component>
@@ -212,7 +212,7 @@
   <component name="PropertiesComponent">
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="aspect.path.notification.shown" value="true" />
-    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1588323505241" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1588323910385" />
     <property name="go.gopath.indexing.explicitly.defined" value="true" />
     <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
     <property name="nodejs_npm_path_reset_for_default_project" value="true" />
@@ -253,12 +253,12 @@
       <option name="presentableId" value="Default" />
       <updated>1588152877746</updated>
       <workItem from="1588152880522" duration="16973000" />
-      <workItem from="1588319878551" duration="3366000" />
+      <workItem from="1588319878551" duration="3554000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="20339000" />
+    <option name="totallyTimeSpent" value="20527000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="0" width="1280" height="800" extended-state="0" />
@@ -361,17 +361,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/serve.py">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="47">
-          <caret line="239" selection-start-line="239" selection-end-line="246" selection-end-column="43" />
-          <folding>
-            <element signature="e#18#46#0" expanded="true" />
-            <marker date="1588323423143" expanded="true" signature="5474:5476" ph="..." />
-          </folding>
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/README.md">
       <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
         <state split_layout="SPLIT">
@@ -382,6 +371,17 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/serve.py">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="280">
+          <caret line="179" column="17" selection-start-line="179" selection-start-column="10" selection-end-line="179" selection-end-column="17" />
+          <folding>
+            <element signature="e#18#46#0" expanded="true" />
+            <marker date="1588323581632" expanded="true" signature="5474:5476" ph="..." />
+          </folding>
+        </state>
+      </provider>
+    </entry>
   </component>
   <component name="masterDetails">
     <states>
diff --git a/serve.py b/serve.py
index b2025d6..3cc1953 100644
--- a/serve.py
+++ b/serve.py
@@ -77,7 +77,7 @@ class Data:
 		self.train_num = int(self.data_num * self.config.train_data_rate)
 
 		self.mean = np.mean(self.data, axis=0)
-		self.std = np.std(self.data, axis=0)
+		self.std = np.std(self.data + 0.0001, axis=0)
 		self.norm_data = (self.data - self.mean) / self.std
 
 		self.start_num_in_test = 0