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完成DBRecommand和修正Theme、Target並在RecommandPoint新增計算正規化參數的方法

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This commit is contained in:
kobayashi 2015-01-17 02:51:29 +08:00
parent a38d3a717e
commit c414cdcae0
4 changed files with 109 additions and 54 deletions
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32
htdocs/lib/Database/DBRecommand.php
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@ -21,9 +21,10 @@ class DBRecommand extends Database
* @param string $where SQL WHERE子句 * @param string $where SQL WHERE子句
* @return array 查詢結果 * @return array 查詢結果
*/ */
protected function queryEdgeByWhere($where)
{ protected function queryEdgeByWhere($where)
$sqlString = "SELECT DISTINCT ".$this->table('Edge').".Ti, ".$this->table('Edge').".Tj, ".$this->table('Edge').".MoveTime". {
$sqlString = "SELECT DISTINCT ".$this->table('Edge').".Ti, ".$this->table('Edge').".Tj, ".$this->table('Edge').".MoveTime".
" FROM ".$this->table('Edge')." WHERE ".$where; " FROM ".$this->table('Edge')." WHERE ".$where;
$query = $this->connDB->prepare($sqlString); $query = $this->connDB->prepare($sqlString);
$query->execute(); $query->execute();
@ -44,11 +45,16 @@ class DBRecommand extends Database
return $result; return $result;
} }
else return null; else return null;
} }
/**
* 內部查詢用
* @param string $where SQL WHERE子句
* @return array 查詢結果
*/
protected function queryBelongByWhere($where) protected function queryBelongByWhere($where)
{ {
$sqlString = "SELECT ".$this->table('tbelong').".Weights FROM ".$this->table('tbelong')." WHERE ".$where; $sqlString = "SELECT ".$this->table('TBelong').".Weights FROM ".$this->table('TBelong')." WHERE ".$where;
$query = $this->connDB->prepare($sqlString); $query = $this->connDB->prepare($sqlString);
$query->execute(); $query->execute();
@ -66,19 +72,29 @@ class DBRecommand extends Database
else return null; else return null;
} }
/**
* 以下一個學習點和主題編號查詢屬於的權重資料
* @param string $next_point 下一個學習點編號
* @return array 查詢結果
*/
public function queryBelongByID($next_point,$theme_number) public function queryBelongByID($next_point,$theme_number)
{ {
$whereClause = $this->table('tbelong').".thID = ".$this->connDB->quote($theme_number)." AND ".$this->table('tbelong').".TID = ".$this->connDB->quote($next_point); $whereClause = $this->table('TBelong').".ThID = ".$this->connDB->quote($theme_number)." AND ".$this->table('TBelong').".TID = ".$this->connDB->quote($next_point);
$AllOfResult = $this->queryBelongByWhere($whereClause); $AllOfResult = $this->queryBelongByWhere($whereClause);
if(count($AllOfResult) != 0) return $AllOfResult; if(count($AllOfResult) != 0) return $AllOfResult;
else return null; else return null;
} }
/**
* 以目前的學習點編號查詢下一個學習點的資訊
* @param string $currentPoint 目前的學習點編號
* @return array 查詢結果
*/
public function queryEdgeByID($currentPoint) public function queryEdgeByID($currentPoint)
{ {
$AllOfResult = $this->queryBelongByWhere("Ti = ".$this->connDB->quote($currentPoint)); //echo "EEEEEEEEE";
$AllOfResult = $this->queryEdgeByWhere($this->table('Edge').".Ti = ".$this->connDB->quote($currentPoint));
if(count($AllOfResult) != 0) return $AllOfResult; if(count($AllOfResult) != 0) return $AllOfResult;
else return null; else return null;
} }

118
htdocs/lib/Recommand/RecommandPoint.php
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@ -1,57 +1,85 @@
<?php <?php
require_once __DIR__.'/../config.php'; namespace UElearning\Recommand;
require_once UELEARNING_ROOT.'/config.php';
require_once UELEARNING_LIB_ROOT.'/Target/Target.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';
use UElearning\Target; use UElearning\Target;
use UElearning\Exception; use UElearning\Study;
use UElearning\Database;
/** /**
* 推薦學習點 * 推薦學習點
* Usage: * Usage:
* $recommand = new RecommandPoint(); * $recommand = new RecommandPoint();
*/ */
class RecommandPoint class RecommandPoint
{ {
/** /**
* 正規化參數 * 正規化參數
* *
* @access private * @access private
* @type double * @type double
*/ */
private $gamma; private $gamma;
/** /**
* 調和參數(常數) * 調和參數(常數)
* *
* @access private * @access private
* @type double * @type double
*/ */
private const $ALPHA = 0.5; const ALPHA=0.5;
private private $recommand;
public function __construct() public function __construct()
{ {
$gamma = 0;
} $this->recommand = new Database\DBRecommand();
}
/**
* 計算正規化參數 /**
* @return double 正規化參數 * 計算正規化參數
*/ * @return double 正規化參數
private function computeNormalizationParameter() */
{ private function computeNormalizationParameter($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
/** $VirtualSum = 0; //虛擬學習點分別算銓重之後的值
* 推薦學習點
* @return array 學習點清單 $edge = $this->recommand->queryEdgeByID('0');
*/ $theme = new Study\Theme($theme_number);
public function recommand($ )
{ for($i=0;$i<count($edge);$i++)
{
} $next_point = $edge[$i]["next_point"];
} $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"];
$VirtualSum += $weight / $next_target->getLearnTime();
if($next_target->isNumberOfPeopleZero()) $Rj = 0;
else $Rj = $next_target->getMj() / $next_target->getPLj();
$EntitySum += $weight * ($next_target->getS() - $Rj + 1) / ($move_time + $next_target->getLearnTime());
}
return $EntitySum/$VirtualSum;
}
/**
* 推薦學習點
* @return array 學習點清單
*/
public function recommand($current_point,$theme_number,$activity_number)
{
}
}

2
htdocs/lib/Study/Theme.php
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@ -96,7 +96,7 @@ class Theme {
/** /**
* 建構子 * 建構子
* *
* @param int $inputTID 主題ID * @param int $inputID 主題ID
* @since 2.0.0 * @since 2.0.0
*/ */
public function __construct($inputID){ public function __construct($inputID){

11
htdocs/lib/Target/Target.php
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@ -293,6 +293,17 @@ class Target {
return $this->getMj(); return $this->getMj();
} }
/**
* 判斷目前標的人數是否為零
*
* @return bool true/此標的目前人數是空的,false/此標的目前人數不是空的
* @since 2.0.0
*/
public function isNumberOfPeopleZero(){
if($this->getCurrentPeople() == 0) return true;
else return false;
}
/** /**
* 增加學習標的目前人數 * 增加學習標的目前人數
* *