1. Precision, Average Precision and Mean Average Precision For the Mathematically Challenged 2. How to calculate precision In this search, the total number of hits is 5.…

Slide 11 Evaluations in information retrieval Slide 2 2 Evaluations in information retrieval: summary The following gives an overview of approaches that are applied to assess…

Information Retrieval and Web Search IR Evaluation and IR Standard Text Collections Slide * Why System Evaluation? There are many retrieval models/ algorithms/ systems, which…

Multimedia Information Retrieval Unlike alphanumeric data, multimedia data do not have any semantic structure Achieving symmetry between annotation and query is difficult…

The World Wide Web Internet Basics Web Basics The Web is a collection of files organized as a giant hypertext Many of these files produce documents called Web pages Web site…

Information Retrieval Evaluation and the Retrieval Process Why evaluate an IR system? To select between alternative systems To determine if a system meets expressed and unexpressed…