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Google Page Rank Algorithm Explained

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Omkar Dash
Omkar Dash

This presentation won me the best presentation award at my University Tech fest "Allegretto" in 2008. I have also presented this seminar as a part of B.Tech curriculum in 7th Semester.

TechnologieBusiness
1  sur  60
Google Page Rank Algorithm Omkar Dash 7 th Semester C.V.Raman College of Engineering
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[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Page Rank Technology :-
Definition of Page Rank ,[object Object],[object Object],[object Object],[object Object]
CALCULATING PAGE RANK
[object Object],[object Object],[object Object],DEFINITION OF TERMS
[object Object],[object Object],Toolbar PageRank (log base 10) Real PageRank 0 0 - 10 1 10 - 100 2 100 - 1,000 3 1,000 - 10,000 4 10,000 - 100,000 5 and so on…
CALCULATION OF PAGERANK ,[object Object],[object Object],A T1 T2 T3 . . . . . . . . TN PR(T1) PR(T2) PR(T3) . . . . . . . . PR(TN) C(A)
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Who came first ? Chicken Or Egg ?
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Lets Learn By Examples !
C(A) = 1 and C(B) = 1 Let, us assume that PR =1.0 & d = 0.85 (by theory !!) PR(A) = (1 – d) + d(PR(B)/1) PR(B) = (1 – d) + d(PR(A)/1) i.e. PR(A) = 0.15 + 0.85 * 1 = 1 PR(B) = 0.15 + 0.85 * 1= 1 The numbers aren’t changing at all ! We made a lucky guess !!
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[object Object]
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[object Object],[object Object]
[object Object],[object Object],a: 0.99823 b: 0.99850 a: 0.99872 b: 0.99891 a: 0.99908 b: 0.99922 a: 0.99933 b: 0.99943 a: 0.99952 b: 0.99959 a: 0.99965 b: 0.99970 a: 0.99975 b: 0.99979 a: 0.99982 b: 0.99985 a: 0.99987 b: 0.99989 a: 0.99991 b: 0.99992 a: 0.99993 b: 0.99994 a: 0.99995 b: 0.99996 a: 0.99996 b: 0.99997 a: 0.99997 b: 0.99998 a: 0.99998 b: 0.99998 a: 0.99999 b: 0.99999 a: 0.99999 b: 0.99999 a: 0.99999 b: 0.99999 a: 0.99999 b: 1.00000 a: 1.00000 b: 1.00000 a: 0.00000 b: 0.00000 a: 0.15000 b: 0.27750 a: 0.38588 b: 0.47799 a: 0.55629 b: 0.62285 a: 0.67942 b: 0.72751 a: 0.76838 b: 0.80313 a: 0.83266 b: 0.85776 a: 0.87909 b: 0.89723 a: 0.91265 b: 0.92575 a: 0.93689 b: 0.94635 a: 0.95440 b: 0.96124 a: 0.96705 b: 0.97200 a: 0.97620 b: 0.97977 a: 0.98280 b: 0.98538 a: 0.98757 b: 0.98944 a: 0.99102 b: 0.99237 a: 0.99351 b: 0.99449 a: 0.99531 b: 0.99602 a: 0.99661 b: 0.99712 a: 0.99755 b: 0.99792
[object Object],[object Object],[object Object]
A B C D
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[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
…… just graphically representing it ! Its okay if A, B, C have Page Ranks, But how come D has ? It has got no in bound links !! A (PR=1.49) B (PR=0.78) C (PR=1.57) D (PR=0.15)
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[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
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[object Object],[object Object]
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Yes, those spam pages are pretty worthless but they sure add up!
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A BETTER SERP ,[object Object],[object Object],[object Object]
REFERENCES ,[object Object],[object Object],[object Object],[object Object]
Thank You Queries Please !
 

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Google Page Rank Algorithm Explained

  • 1. Google Page Rank Algorithm Omkar Dash 7 th Semester C.V.Raman College of Engineering
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  • 12. Who came first ? Chicken Or Egg ?
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  • 18. Lets Learn By Examples !
  • 19. C(A) = 1 and C(B) = 1 Let, us assume that PR =1.0 & d = 0.85 (by theory !!) PR(A) = (1 – d) + d(PR(B)/1) PR(B) = (1 – d) + d(PR(A)/1) i.e. PR(A) = 0.15 + 0.85 * 1 = 1 PR(B) = 0.15 + 0.85 * 1= 1 The numbers aren’t changing at all ! We made a lucky guess !!
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  • 28. A B C D
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  • 33. …… just graphically representing it ! Its okay if A, B, C have Page Ranks, But how come D has ? It has got no in bound links !! A (PR=1.49) B (PR=0.78) C (PR=1.57) D (PR=0.15)
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  • 49. Yes, those spam pages are pretty worthless but they sure add up!
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  • 59. Thank You Queries Please !
  • 60.