diff --git a/htdocs/lib/Database/DBRecommand.php b/htdocs/lib/Database/DBRecommand.php
index 2f6241c..043a28d 100644
--- a/htdocs/lib/Database/DBRecommand.php
+++ b/htdocs/lib/Database/DBRecommand.php
@@ -82,7 +82,7 @@ class DBRecommand extends Database
         $whereClause = $this->table('TBelong').".ThID = ".$this->connDB->quote($theme_number)." AND ".$this->table('TBelong').".TID = ".$this->connDB->quote($next_point);
         $AllOfResult = $this->queryBelongByWhere($whereClause);
 
-        if(count($AllOfResult) != 0) return $AllOfResult;
+        if(count($AllOfResult) != 0) return $AllOfResult[0];
         else return null;
     }
 
diff --git a/htdocs/lib/Recommand/RecommandPoint.php b/htdocs/lib/Recommand/RecommandPoint.php
index 3c23759..6f763a1 100644
--- a/htdocs/lib/Recommand/RecommandPoint.php
+++ b/htdocs/lib/Recommand/RecommandPoint.php
@@ -6,6 +6,8 @@ require_once UELEARNING_ROOT.'/config.php';
 require_once UELEARNING_LIB_ROOT.'/Target/Target.php';
 require_once UELEARNING_LIB_ROOT.'/Database/DBRecommand.php';
 require_once UELEARNING_LIB_ROOT.'/Study/Theme.php';
+require_once UELEARNING_LIB_ROOT.'/Study/Study.php';
+require_once UELEARNING_LIB_ROOT.'/Study/StudyActivity.php';
 use UElearning\Target;
 use UElearning\Study;
 use UElearning\Database;
@@ -47,7 +49,7 @@ class RecommandPoint
      * 計算正規化參數
      * @return double 正規化參數
      */
-    private function computeNormalizationParameter($theme_number)
+    public function computeNormalizationParameter($theme_number)
     {
         $normal = 0;  //正規化之後的GAMMA值
         $EntitySum = 0;  //實體學習點分別算銓重之後的值
@@ -62,7 +64,7 @@ class RecommandPoint
             $move_time = $edge[$i]["move_time"];
             $next_target = new Target\Target($next_point);
             $belong = $this->recommand->queryBelongByID($next_point,$theme->getId());
-            $weight = $belong[0]["weight"];
+            $weight = $belong["weight"];
 
             $VirtualSum += $weight / $next_target->getLearnTime();