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precision
Last modified: Friday, July 30, 2004 

(pri-sizh´&n;) (n.) (1) When used in reference to search engines, the ability of the search engine to return only relevant documents in the search results instead of documents that may not have relevance. Words in a search query that have more than one meaning have a greater chance of returning results that are not relevant as the search engine can only guess what information the user is searching for. Precision often is expressed as a percentage and is measured by dividing the number of relevant documents produced in a search by the total number of resultant documents that the search query presented. For example, if 100 pages are found in a search and 85 of those pages are relevant then the search had 85% precision.

Also see How Web Search Engines Work in the Did You Know . . . ? section of Webopedia.

(2) When used to describe floating-point numbers, the number of bits used to hold the fractional part. The more precision a system uses, the more exactly it can represent fractional quantities.

Floating-point numbers are often classified as single precision or double precision. A double-precision number uses twice as many bits as a single-precision value, so it can represent fractional quantities much more exactly.

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Sponsored listings

Nabtesco: Precision - Manufactures high performance motion control equipment, including precision gear reducers, hollow shaft gear heads and servo-actuators & controllers.

Pencom: EDM Machining Services - Offers precision machining, turning, milling, screw machining and stamping services, as well as electro-mechanical and thermal management components.

Stein Seal: Machining - Manufactures seals and precision components for aircraft engines, power generation equipment, pumps, compressors, centrifuges, and marine use.


For internet.com pages about precision . Also check out the following links!

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Sponsored listings

GlobalSpec.com: Precision Machining - Provides database of suppliers for precision machining. Includes catalogs, technical information, and supplier contact information.

MicroMo Electronics: Precision Gears - Specializes in the design, assembly and application of high precision, miniature DC drive systems, components, and motion control systems.

Techna-Tool: Precision Gears - Supplies reliable tool monitoring systems to high production metal cutting manufacturers, including monitoring of precision gears.

Pacific Bearing: Precision Bearings - Provides innovative, self-lubricated linear bearings and linear motion solutions. Products include precision, linear, ceramic, and ball bearings.

GlobalSpec.com: Precision Gears - Provides database of suppliers for Precision Gears. Browse catalogs and view technical information.

related categories

Data

Search Engines

related terms

character string

double precision

floating-point number

query

search engine

spider


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