query vector - ترجمة إلى إنجليزي
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query vector - ترجمة إلى إنجليزي

FEATURE TO EFFICIENTLY EXECUTE QUERIES EFFICIENTLY IN DBMS SOFTWARES
Query optimizer; Cost-based query optimizer; Query optimisation; Query planner

query vector      
(n.) = vector de búsqueda
Ex: A query is treated in the same way, and the query vector is then compared with the document vectors, using the cosine correlation coefficient to give a measure of the extent to which they coincide.
vector         
  • Representación de los vectores.
  • Cambio de base vectorial.
  • Cambio de base vectorial.
  • Representación gráfica de una magnitud vectorial, con indicación de su punto de aplicación y de los versores cartesianos.
  • Producto por un escalar.
  • <math>\mathbf{r}(t)=\sin(t) \mathbf{i}+\cos(t)\mathbf{j}+ 5t\mathbf{k}</math>
  • Componentes del vector.
  • Coordenadas [[tridimensional]]es.
  • [[Coordenadas cartesianas]].
  • Método del paralelogramo.
  • Método del triángulo.
  • 180px
OBJETO GEOMÉTRICO QUE TIENE MAGNITUD Y DIRECCIÓN
Vector (metemática); Vectores; Vector (geometría); Vector matemático; Vector físico; Fisica vector; Vector de desplazamiento; Vector (fisica); Vector (matematica); Vector geometrico; Vector fisico; Vector matematico; Vector (Geometría); Vector geométrico; Vector (Geometria); Vector (geometria); Vector (metematica); Vector (matemática); Suma de vectores; Vector (espacio euclideo); Magnitud vectorial; Suma vectorial; Vector (física); Vector (espacio euclídeo); Vectorial
= vector.
Ex: Salton uses a modification of this in the SMART system in which each document (and each query) is described in terms of a multi-dimensional vector.
----
* vector característico = eigenvector.
* vector de búsqueda = query vector.
* vector de los documentos = document vector.
* vector de peso específico = weighted vector.
* vector representativo = eigenvector.
vector         
  • Operational VECTOR equipped with jammers, communication systems and smoke grenade launchers
MOTOR VEHICLE
Defenture VECTOR
(n.) = vector
Ex: Salton uses a modification of this in the SMART system in which each document (and each query) is described in terms of a multi-dimensional vector.
----
* access vector = expresión de búsqueda
* document vector = vector de los documentos
* eigenvector = vector representativo, vector característico
* insect vector = insecto portador de enfermedad
* query vector = vector de búsqueda
* weighted vector = vector de peso específico

تعريف

Vector
plásmido o fago en el cual se puede insertar un fragmento de ADN complementario o genómico

ويكيبيديا

Query optimization

Query optimization is a feature of many relational database management systems and other databases such as NoSQL and graph databases. The query optimizer attempts to determine the most efficient way to execute a given query by considering the possible query plans.

Generally, the query optimizer cannot be accessed directly by users: once queries are submitted to the database server, and parsed by the parser, they are then passed to the query optimizer where optimization occurs. However, some database engines allow guiding the query optimizer with hints.

A query is a request for information from a database. It can be as simple as "find the address of a person with Social Security number 123-45-6789," or more complex like "find the average salary of all the employed married men in California between the ages 30 to 39 who earn less than their spouses." The result of a query is generated by processing the rows in a database in a way that yields the requested information. Since database structures are complex, in most cases, and especially for not-very-simple queries, the needed data for a query can be collected from a database by accessing it in different ways, through different data-structures, and in different orders. Each different way typically requires different processing time. Processing times of the same query may have large variance, from a fraction of a second to hours, depending on the chosen method. The purpose of query optimization, which is an automated process, is to find the way to process a given query in minimum time. The large possible variance in time justifies performing query optimization, though finding the exact optimal query plan, among all possibilities, is typically very complex, time-consuming by itself, may be too costly, and often practically impossible. Thus query optimization typically tries to approximate the optimum by comparing several common-sense alternatives to provide in a reasonable time a "good enough" plan which typically does not deviate much from the best possible result.