Search (5 results, page 1 of 1)

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Abstract

Why doesn't your home page appear on the first page of search results, even when you query your own name? How do other Web pages always appear at the top? What creates these powerful rankings? And how? The first book ever about the science of Web page rankings, "Google's PageRank and Beyond" supplies the answers to these and other questions and more. The book serves two very different audiences: the curious science reader and the technical computational reader. The chapters build in mathematical sophistication, so that the first five are accessible to the general academic reader. While other chapters are much more mathematical in nature, each one contains something for both audiences. For example, the authors include entertaining asides such as how search engines make money and how the Great Firewall of China influences research. The book includes an extensive background chapter designed to help readers learn more about the mathematics of search engines, and it contains several MATLAB codes and links to sample Web data sets. The philosophy throughout is to encourage readers to experiment with the ideas and algorithms in the text. Any business seriously interested in improving its rankings in the major search engines can benefit from the clear examples, sample code, and list of resources provided. It includes: many illustrative examples and entertaining asides; MATLAB code; accessible and informal style; and complete and self-contained section for mathematics review.

Content

Inhalt: Chapter 1. Introduction to Web Search Engines: 1.1 A Short History of Information Retrieval - 1.2 An Overview of Traditional Information Retrieval - 1.3 Web Information Retrieval Chapter 2. Crawling, Indexing, and Query Processing: 2.1 Crawling - 2.2 The Content Index - 2.3 Query Processing Chapter 3. Ranking Webpages by Popularity: 3.1 The Scene in 1998 - 3.2 Two Theses - 3.3 Query-Independence Chapter 4. The Mathematics of Google's PageRank: 4.1 The Original Summation Formula for PageRank - 4.2 Matrix Representation of the Summation Equations - 4.3 Problems with the Iterative Process - 4.4 A Little Markov Chain Theory - 4.5 Early Adjustments to the Basic Model - 4.6 Computation of the PageRank Vector - 4.7 Theorem and Proof for Spectrum of the Google Matrix Chapter 5. Parameters in the PageRank Model: 5.1 The a Factor - 5.2 The Hyperlink Matrix H - 5.3 The Teleportation Matrix E Chapter 6. The Sensitivity of PageRank; 6.1 Sensitivity with respect to alpha - 6.2 Sensitivity with respect to H - 6.3 Sensitivity with respect to vT - 6.4 Other Analyses of Sensitivity - 6.5 Sensitivity Theorems and Proofs Chapter 7. The PageRank Problem as a Linear System: 7.1 Properties of (I - alphaS) - 7.2 Properties of (I - alphaH) - 7.3 Proof of the PageRank Sparse Linear System Chapter 8. Issues in Large-Scale Implementation of PageRank: 8.1 Storage Issues - 8.2 Convergence Criterion - 8.3 Accuracy - 8.4 Dangling Nodes - 8.5 Back Button Modeling
Chapter 9. Accelerating the Computation of PageRank: 9.1 An Adaptive Power Method - 9.2 Extrapolation - 9.3 Aggregation - 9.4 Other Numerical Methods Chapter 10. Updating the PageRank Vector: 10.1 The Two Updating Problems and their History - 10.2 Restarting the Power Method - 10.3 Approximate Updating Using Approximate Aggregation - 10.4 Exact Aggregation - 10.5 Exact vs. Approximate Aggregation - 10.6 Updating with Iterative Aggregation - 10.7 Determining the Partition - 10.8 Conclusions Chapter 11. The HITS Method for Ranking Webpages: 11.1 The HITS Algorithm - 11.2 HITS Implementation - 11.3 HITS Convergence - 11.4 HITS Example - 11.5 Strengths and Weaknesses of HITS - 11.6 HITS's Relationship to Bibliometrics - 11.7 Query-Independent HITS - 11.8 Accelerating HITS - 11.9 HITS Sensitivity Chapter 12. Other Link Methods for Ranking Webpages: 12.1 SALSA - 12.2 Hybrid Ranking Methods - 12.3 Rankings based on Traffic Flow Chapter 13. The Future of Web Information Retrieval: 13.1 Spam - 13.2 Personalization - 13.3 Clustering - 13.4 Intelligent Agents - 13.5 Trends and Time-Sensitive Search - 13.6 Privacy and Censorship - 13.7 Library Classification Schemes - 13.8 Data Fusion Chapter 14. Resources for Web Information Retrieval: 14.1 Resources for Getting Started - 14.2 Resources for Serious Study Chapter 15. The Mathematics Guide: 15.1 Linear Algebra - 15.2 Perron-Frobenius Theory - 15.3 Markov Chains - 15.4 Perron Complementation - 15.5 Stochastic Complementation - 15.6 Censoring - 15.7 Aggregation - 15.8 Disaggregation

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Abstract

Mit HTML und diesem Buch kann wirklich jeder im Internet publizieren. Step-by-step-Touren vermitteln das grundlegende Know-how, das Sie in die Lage versetzt, in Eigenregie Homepages erstellen und diese einfallsreich, witzig und übersichtlich zu gestalten. Appetit auf die eigene Homepage machen die mehr als 200 Links zu den heißesten und coolsten HomePages im WWW. Alle Links sind von CD startbar. Dazu gibt es direkt einsetzbare Grafiken, Bars, Lines, Dots und Body-Backgrounds für Ihre WWWDokumente. Vom InfoKonsumenten zum InfoProduzenten. Systematisch führt das Buch in den Aufbau von HTML und in die HTML zugrundeliegende "Sprache" SGML ein. Ausgangspunkt ist dabei sowohl der derzeitige WWW-Standard HTML 2.0 als auch das aktuelle HTML 3.0 mit allen neu hinzugekommenen Möglichkeiten - z. B. mathematischen Formeln und Tabellen sowie den Netscape-Erweiterungen. Natürlich kommen auch aktuelle Trends wie die Handhabung von Client-Site-Imagemaps und des neuartigen Frames-Konzept nicht zu kurz. Trends und neue Entwicklungen. Dreh- und Angelpunkt aller Betrachtungen ist Windows 95. Komplett praxisorientiert zeigt das Buch alle Möglichkeiten grafischer Browser und Editoren unter Windows 95. Zur Sprache kommen HTML-Editoren wie HotMetal, HotDog, Home-Page-Creator, InternetAssistant von Microsoft etc. Auch neue Entwicklungen wie HotJava werden unter der Berücksichtigung ihrer zukünftigen Verwendbarkeit unter Windows 95 betrachtet. Und das Genialste daran: Ein Großteil der Software findet sich direkt startfähig auf der CD. Kurz & bündig. * Für ganz Eilige: Die eigene Homepage mit dem CompuServe Wizzard * SGML: Ein Standard für Textdokumente, die sich elektronisch speichern und austauschen lassen * HTML 2.0 und HTML 3.0: Der erfolgreiche Standard im World Wide Web und der aktuelle Vorschlag für das Publizieren im World Wide Web * HTML-Erweiterungen: neue Attribute zu offizieller Tags, neue Tags für die Schriftgestaltung und zur Einbindung von Multimedia-Dateien, Client-SiteImagemaps u. v. a. m. * Adressierungskonzepte im Internet: IP-Nummern, Anwendungsprotokolle, HTTP-URL's etc. * HTTP-Server und FTP für Windows * Ausblicke auf Java-Applets, Panorama, Hyper-G VRML und HTML als Standard für den elektronischen Informationsaustausch

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Abstract

As the World Wide Web continues to expand, it becomes increasingly difficult for users to obtain information efficiently. Because most search engines read format languages such as HTML or SGML, search results reflect formatting tags more than actual page content, which is expressed in natural language. Spinning the Semantic Web describes an exciting new type of hierarchy and standardization that will replace the current "Web of links" with a "Web of meaning." Using a flexible set of languages and tools, the Semantic Web will make all available information - display elements, metadata, services, images, and especially content - accessible. The result will be an immense repository of information accessible for a wide range of new applications. This first handbook for the Semantic Web covers, among other topics, software agents that can negotiate and collect information, markup languages that can tag many more types of information in a document, and knowledge systems that enable machines to read Web pages and determine their reliability. The truly interdisciplinary Semantic Web combines aspects of artificial intelligence, markup languages, natural language processing, information retrieval, knowledge representation, intelligent agents, and databases.

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Date

22. 3.2008 14:24:08

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Date

22. 3.2008 16:15:37