Luhn argued that words in a document that are either very frequent or very infrequent are not useful for discriminating the document from other documents in the corpus.
- 5. HOW DOES A SEARCH ENGINE WORK
- from An Introduction to Search Engines and Web Navigation
- Publisher: John Wiley & Sons
- Released: October 2010
参见 zipfs' law
Share this highlighthttp://www.safaribooksonline.com/a/an-introduction-to/3745141/