پایان نامه تشخیص هرزنامه وب به کمک تکنیک های داده کاوی

فهرست:

چکیده--------------------------------------------------------------------------------1

فصل اول:مقدمه----------------------------------------------------------------------2

1-1 پیش گفتار ----------------------------------------------------------------------3

 1-2 بیان مسئله ----------------------------------------------------------------------3

1-3 اهمیت و ضرورت انجام تحقیق ---------------------------------------------------4

ساختار پایان نامه --------------------------------------------------------------------5

فصل دوم:وب و هرزنامه های وب----------------------------------------------------6

2-1 وب جهان گستر ----------------------------------------------------------------7

2-1-1 وب به عنوان گراف--------------------------------------------------------8

2-1-2 گراف وب در صفحه و سطح میزبان---------------------------------------8

2-1-3 اتصال--------------------------------------------------------------------9

2-2 موتورهای جستجو------------------------------------------------------------10

2-2-1 معماری موتورهای جستجوی وب----------------------------------------11

2-2-2 سرویس دهنده پرس و جوی موتور جستجو-------------------------------13

2-3 رتبه بندی-------------------------------------------------------------------13

2-3-1 رتبه بندی مبتنی بر محتوا----------------------------------------------13

2-3-2 الگوریتم های مبتنی بر لینک-------------------------------------------15

2-4 هرزنامه وب---------------------------------------------------------------19

2-4-1 هرزنامه محتوا------------------------------------------------------20

2-4-2 هرزنامه لینک -----------------------------------------------------22

2-4-3 تکنیک های مخفی -------------------------------------------------27

2-5 یادگیری ماشین ------------------------------------------------------------29

2-5-1 NaΪVe Bayes     --------------------------------------------------------30

2-5-2 درخت تصمیم ------------------------------------------------------------31

2-5-3 ماشین بردار پشتیبان-------------------------------------------------------33

2-6 ترکیب طبقه بندی کننده ها---------------------------------------------------------35

2-6-1 Bagging  ----------------------------------------------------------------35

2-6-2 Boosting  ---------------------------------------------------------------36

2-7 روش های ارزیابی  --------------------------------------------------------------37

2-7-1 ارزیابی متقاطع -----------------------------------------------------------38

2-7-2  دقت و فراخوانی----------------------------------------------------------38

2-7-3 منحنی ROC   ------------------------------------------------------------39

2-8 جمع بندی-------------------------------------------------------------------------40

فصل سوم: پیشینه تحقیق  -------------------------------------------------------------41

3-1 مجموعه داده های مورد استفاده توسط محققین --------------------------------------42

3-1-1 UK2006  ---------------------------------------------------------------42

3-1-2 UK2007  ---------------------------------------------------------------43

3-1-3 مجموعه داده جمع آوری شده با استفاده از جستجوی MSN  -----------------44

3-1-4 DC2010  ---------------------------------------------------------------44

3-2 مطالعات مبتنی بر محتوا----------------------------------------------------------47

3-3 روش های مبتنی بر لینک---------------------------------------------------------51

3-3-1 الگوریتم های مبتنی بر انتشار برچسب ها --------------------------------51

3-3-2 رتبه بندی تابعی --------------------------------------------------------55

3-3-3 الگوریتم های هرس لینک و وزن دهی دوباره-----------------------------56

3-3-4 الگوریتم های مبتنی بر پالایش برچسب ها --------------------------------57

3-4 روش های مبتی بر لینک و محتوا --------------------------------------------------------58

3-4-1 مطالعات مبتنی بر کاهش ویژگی -------------------------------------------------57

3-4-2 مطالعات مبتنی بر ترکیب طبقه بندی کننده ها--------------------------------------59

3-4-3 مطالعات مبتنی بر تست اهمیت ویژگی های متفاوت در تشخیص هرزنامه ----------63

3-4-4 مطالعات مبتنی بر پیکربندی وب ------------------------------------------------71

3-4-5 تشخیص هرزنامه از طریق آنالیز مدلهای زبانی-----------------------------------76

3-4-6 تاثیر زبان صفحه بر ویژگی های تشخیص هرزنامه وب---------------------------79

3-4-7 رویکرد ترکیب ویژگی های مبتنی بر محتوا و لینک برای صفحات عربی ----------82

3-5 جمع بندی---------------------------------------------------------------------------------83

فصل چهارم: پیاده سازی ایده پیشنهادی -------------------------------------------------------85

4-1 مقدمه-------------------------------------------------------------------------------------86

4-2 ویژگی های مجموعه داده انتخابی ----------------------------------------------------------87

4-3 پیش پردازش -----------------------------------------------------------------------------92

4-3-1 پیش پردازش مجموعه داده UK2007 --------------------------------------------------93

4-3-2 کاهش ویژگی ها با اعمال الگوریتم های داده کاوی--------------------------------------93

4-4 داده کاوی و ارزیابی مدل ها--------------------------------------------------------------96

   4-4-1 نتایج الگوریتم ها با اعمال روش های کاهش ویژگی  --------------------------------102

4-4-2 مقایسه مقدار  F_measure بدست آمده از الگوریتم ها با اعمال بر روی ویژگی های بدست آمده   از الگوریتم های کاهش ویژگی------------------------------------------------------109

4-5 تفسیر نتایج----------------------------------------------------------------------------110

4-6 جمع بندی------------------------------------------------------------------------------114

فصل پنجم: نتیجه گیری و کارهای آتی ---------------------------------------------------------115

5-1  نتیجه گیری ------------------------------------------------------------------------116

5-2 کارهای آتی- -------------------------------------------------------------------------117

منابع------------------------------------------------------------------------------------------118

     پیوست1 ------------------------------------------------------------------------------------125

    پیوست 2 ------------------------------------------------------------------------------------126

   پیوست 3-------------------------------------------------------------------------------------126

   پیوست4 -------------------------------------------------------------------------------------127

   پیوست 5-------------------------------------------------------------------------------------127

   پیوست 6-------------------------------------------------------------------------------------128

   پیوست 7-------------------------------------------------------------------------------------129

  پیوست 8-------------------------------------------------------------------------------------129

  پیوست 9-------------------------------------------------------------------------------------129

  پیوست 10 ----------------------------------------------------------------------------------130

 پیوست 11 -----------------------------------------------------------------------------------130

 پیوست  12-----------------------------------------------------------------------------------131

 پیوست 13-----------------------------------------------------------------------------------132

 پیوست 14-----------------------------------------------------------------------------------133

چکیده انگلیسی--------------------------------------------------------------------------------134

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