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- этимология
Что (кто) такое query expansion - определение
TYPE OF EXPANSION
Automatic query reformulation
Найдено результатов: 563
query expansion
<information science> Adding search terms to a user's
search. Query expansion is the process of a search engine
adding search terms to a user's weighted search. The
intent is to improve precision and/or recall. The
additional terms may be taken from a thesaurus. For example
a search for "car" may be expanded to: car cars auto autos
automobile automobiles.
The additional terms may also be taken from documents
that the user has specified as being relevant; this is the
basis for the "more like this" feature of some search engines.
The extra terms can have positive or negative weights.
(1999-08-27)
Query expansion
Query expansion (QE) is the process of reformulating a given query to improve retrieval performance in information retrieval operations, particularly in the context of query understanding.
database query language
COMPUTER LANGUAGE USED TO MAKE QUERIES INTO DATABASES AND INFORMATION SYSTEMS SUCH AS SQL OR XQUERY
Database query language; Information retrieval query language; Query languages; Query structure; Relational database querying; List of query languages; List of data query languages; List of database query languages
Information retrieval query language
COMPUTER LANGUAGE USED TO MAKE QUERIES INTO DATABASES AND INFORMATION SYSTEMS SUCH AS SQL OR XQUERY
Database query language; Information retrieval query language; Query languages; Query structure; Relational database querying; List of query languages; List of data query languages; List of database query languages
An information retrieval (IR) query language is a query language used to make queries into search index. A query language is formally defined in a context-free grammar (CFG) and can be used by users in a textual, visual/UI or speech form.
Laplace expansion
N×N DETERMINANT AS SUM OF N MINORS WEIGHTED BY COFACTOR FROM ROW AND COLUMN NOT IN MINOR
Determinant expansion; Expansion by minors; Cofactor expansion
In linear algebra, the Laplace expansion, named after Pierre-Simon Laplace, also called cofactor expansion, is an expression of the determinant of an matrix as a weighted sum of minors, which are the determinants of some submatrices of . Specifically, for every ,
Boole's expansion theorem
THEOREM IN BOOLEAN ALGEBRA
Shannon's expansion theorem; Shannon cofactor; Shannon's Expansion Theorem; Shannon expansion; Shannon decomposition; Shannon's expansion; Fundamental theorem of Boolean algebra; Boole's expansion; Boole expansion; Boole–Shannon expansion; Boole-Shannon expansion
Boole's expansion theorem, often referred to as the Shannon expansion or decomposition, is the identity: F = x \cdot F_x + x' \cdot F_{x'}, where F is any Boolean function, x is a variable, x' is the complement of x, and F_xand F_{x'} are F with the argument x set equal to 1 and to 0 respectively.
RDF query language
PROGRAMMING LANGUAGE ALLOWING EASY QUERYING ON RDF GRAPHS
RDQL; RDF query languages
An RDF query language is a computer language, specifically a query language for databases, able to retrieve and manipulate data stored in Resource Description Framework (RDF) format.
Expansion of the universe
![metric]] seen on the left. This visualization can be confusing because it appears as if the universe is expanding into a pre-existing empty space over time. Instead, the expansion created, and continues to create, all of known space and time.](https://commons.wikimedia.org/wiki/Special:FilePath/CMB Timeline300 no WMAP.jpg?width=200 "metric]] seen on the left. This visualization can be confusing because it appears as if the universe is expanding into a pre-existing empty space over time. Instead, the expansion created, and continues to create, all of known space and time.")
![critical density]] (<math>\Omega_m</math>).](https://commons.wikimedia.org/wiki/Special:FilePath/Evolution of the universe.svg?width=200 "critical density]] (<math>\Omega_m</math>).")
![When an object is receding, its light gets stretched ([[redshift]]ed). When the object is approaching, its light gets compressed ([[blueshift]]ed).](https://commons.wikimedia.org/wiki/Special:FilePath/Redshift blueshift.svg?width=200 "When an object is receding, its light gets stretched ([[redshift]]ed). When the object is approaching, its light gets compressed ([[blueshift]]ed).")
.png?width=200 "The diagram depicts the expansion of the universe and the relative observer phenomenon. The blue galaxies have expanded further apart than the white galaxies. When choosing an arbitrary reference point such as the gold galaxy or the red galaxy, the increased distance to other galaxies the further away they are appear the same. This phenomenon of expansion indicates two factors: there is no centralized point in the universe, and that the Milky Way Galaxy is not the center of the universe. The appearance of centrality is due to an observer bias that is equivalent no matter what location an observer sits.")
INCREASE IN DISTANCE BETWEEN PARTS OF THE UNIVERSE OVER TIME
Expansion of space; Expanding universe; Expanding Universe; Universe expansion; Expansion of the Universe; Cosmic expansion; Metric expansion; Space expansion; Expansion of space in the Big Bang theory; Metric expansion of the universe; Universe's expansion; The Big Bang and The Great Expansion; Metric impansion of space; Quantum radiation; Cosmological expansion; Expansion of universe; Metric expansion of space
The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes.
Expansion deflection nozzle
ADVANCED ROCKET NOZZLE WHICH ACHIEVES ALTITUDE COMPENSATION THROUGH INTERACTION OF THE EXHAUST GAS WITH THE ATMOSPHERE
Expansion-deflection nozzle; User:RedHotIceCube/Expansion deflection nozzle
The expansion-deflection nozzle is a rocket nozzle which achieves altitude compensation through interaction of the exhaust gas with the atmosphere, much like the plug and aerospike nozzles.
Trinucleotide repeat expansion
DNA MUTATION
Triplet repeat expansion; Tri-nucleotide repeat expansion
A trinucleotide repeat expansion, also known as a triplet repeat expansion, is the DNA mutation responsible for causing any type of disorder categorized as a trinucleotide repeat disorder. These are labelled in dynamical genetics as dynamic mutations.
Википедия
Query expansion
Query expansion (QE) is the process of reformulating a given query to improve retrieval performance in information retrieval operations, particularly in the context of query understanding. In the context of search engines, query expansion involves evaluating a user's input (what words were typed into the search query area, and sometimes other types of data) and expanding the search query to match additional documents. Query expansion involves techniques such as:
- Finding synonyms of words, and searching for the synonyms as well
- Finding semantically related words (e.g. antonyms, meronyms, hyponyms, hypernyms)
- Finding all the various morphological forms of words by stemming each word in the search query
- Fixing spelling errors and automatically searching for the corrected form or suggesting it in the results
- Re-weighting the terms in the original query
Query expansion is a methodology studied in the field of computer science, particularly within the realm of natural language processing and information retrieval.
