Transcription of Introduction to Information Retrieval
{{id}} {{{paragraph}}}
Online edition (c) 2009 Cambridge UPDRAFT! April 1, 2009 Cambridge University Press. Feedback classification and NaiveBayesThus far, this book has mainly discussed the process ofad hoc Retrieval , whereusers have transient Information needs that they try to address by posingone or more queries to a search engine. However, many users have ongoinginformation needs. For example, you might need to track developments inmulticore computer chips. One way of doing this is to issue the querymulti-coreANDcomputerANDchipagainst an index of recent newswire articles eachmorning. In this and the following two chapters we examine the question:How can this repetitive task be automated? To this end, many systems sup-portstanding queries. A standing query is like any other query except that itS TANDI NG Q UERYis periodically executed on a collection to which new documents are incre-mentally added over your standing query is justmulticoreANDcomputerANDchip, you will tendto miss many relevant new articles which use other terms suchasmulticoreprocessors.
Apr 01, 2009 · We begin this chapter with a general introduction to the text classification problem including a formal definition (Section 13.1); we then cover Naive Bayes, aparticularlysimple andeffectiveclassification method (Sections 13.2– 13.4). All of the classification algorithms we study represent documents in high-dimensional spaces.
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
{{id}} {{{paragraph}}}