Algorithms for Web Indexing and Searching Gerth Stlting Brodal and - PowerPoint PPT Presentation

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Algorithms for Web Indexing and Searching Gerth Stlting Brodal and Rolf Fagerberg Fall 2002 1 Course Motivation How does Google work? 2 Course Motivation How does Google work? How do search engines work? 2 Course Motivation How

Algorithms for Web Indexing and Searching Gerth Stølting Brodal and Rolf Fagerberg Fall 2002 1
Course Motivation How does Google work? 2
Course Motivation How does Google work? ⇓ How do search engines work? 2
Course Motivation How does Google work? ⇓ How do search engines work? ⇓ Algorithms for web indexing and searching 2
Course Outline 1. Introduction to Course 2. General Anatomy of Web Search Engines 3. Building blocks of Search Engines (a) Web Crawlers • Anatomy of crawlers • Crawling strategy (b) Index • Inverted files • Suffix trees • Signature files • Compression • Issues of efficient construction • Duplicate removal 3
Course Outline (c) Types of Queries (d) Ranking • Textbased methods – Vector based methods – Latent semantic indexing • Link based methods – PageRank – HITS – SALSA – Others 4
Course Outline 4. Further topics (a) Clustering (b) Automatic Categorization/Hierarchy Building (c) Evaluation of search engines (d) Structure of and Models for the Web Graph (e) Data Mining 5
Formal Course Description Prerequisites: dADS Literature: Handouts Course language: Danish or English Credits: 2 points/10 ECTS Evaluation: Programming project Course page: http://www.daimi.au.dk/~gerth/webalg02/index.html 6
Programming Project Implement a Web Search Engine 7
Programming Project Implement a Web Search Engine Distributed project Groups (2–4 persons) doing: Web crawling Index building Ranking Query interface Start: index Aarhus University website Goal: index domain .dk 7

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