Ranking Web Pages

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Web Search: Ranking Web Pages
Statistics ,[object Object],[object Object]
Search Engines ,[object Object],[object Object],[object Object],[object Object]
Search Engines ,[object Object],[object Object],[object Object]
Search Engines ,[object Object],[object Object],[object Object],[object Object],[object Object]
Search Engine ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Search Engine ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Ranking result pages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Problems with content-based ranking ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Based on link structure ,[object Object],[object Object],[object Object],[object Object]
Backlink ,[object Object],[object Object],[object Object],[object Object],[object Object]
PageRank ,[object Object],[object Object],[object Object],[object Object]
PageRank ,[object Object],[object Object],[object Object],[object Object],[object Object]
Basic ideas ,[object Object],[object Object],[object Object],[object Object],8 4 4
PageRank Definition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Computing PageRank ,[object Object],[object Object],[object Object],[object Object]
Convergence ,[object Object],[object Object],[object Object],[object Object]
Example The sum of all PageRank’s is the total number of pages p1 p2 p3 r1 r3 r2 0.5 0 0.5 0 0 0.5 0.5 1 0 = r1 r3 r2
Random surfer model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rank leak ,[object Object],[object Object],p1 p2 p3 r1 r3 r2 0.5 0 0.5 0 0 0.5 0.5 0 0 = r1 r3 r2
Rank sink ,[object Object],[object Object],[object Object]
An example of rank sink p1 p2 p3 r1 r3 r2 0.5 0 0.5 0 1 0.5 0.5 0 0 = r1 r3 r2
Solution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
An example p1 p2 p3 the sum of all PageRank’s is still the total number of pages. r1 r3 r2 0.5 0 0.5 0 1 0.5 0.5 0 0 = r1 r3 r2 + 0.2 0.2 0.2
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Ranking Web Pages

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Ranking Web Pages

  • 1. Web Search: Ranking Web Pages
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  • 18. Example The sum of all PageRank’s is the total number of pages p1 p2 p3 r1 r3 r2 0.5 0 0.5 0 0 0.5 0.5 1 0 = r1 r3 r2
  • 19.
  • 20.
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  • 22. An example of rank sink p1 p2 p3 r1 r3 r2 0.5 0 0.5 0 1 0.5 0.5 0 0 = r1 r3 r2
  • 23.
  • 24. An example p1 p2 p3 the sum of all PageRank’s is still the total number of pages. r1 r3 r2 0.5 0 0.5 0 1 0.5 0.5 0 0 = r1 r3 r2 + 0.2 0.2 0.2