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Vector
Vector most often refers to: *Euclidean vector, a quantity with a magnitude and a direction *Vector (epidemiology), an agent that carries and transmits an infectious pathogen into another living organism Vector may also refer to: Mathematics and physics *Vector (mathematics and physics) **Row and column vectors, single row or column matrices **Vector space ** Vector field, a vector for each point Molecular biology *Vector (molecular biology), a DNA molecule used as a vehicle to artificially carry foreign genetic material into another cell **Cloning vector, a small piece of DNA into which a foreign DNA fragment can be inserted for cloning purposes **Shuttle vector, a plasmid constructed so that it can propagate in two different host species **Viral vector, a tool commonly used by molecular biologists to deliver genetic materials into cells Computer science *Vector, a one-dimensional array data structure **Distance-vector routing protocol, a class of routing protocols **Dope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VECTOR
Vector most often refers to: *Euclidean vector, a quantity with a magnitude and a direction *Vector (epidemiology), an agent that carries and transmits an infectious pathogen into another living organism Vector may also refer to: Mathematics and physics *Vector (mathematics and physics) **Row and column vectors, single row or column matrices **Vector space ** Vector field, a vector for each point Molecular biology *Vector (molecular biology), a DNA molecule used as a vehicle to artificially carry foreign genetic material into another cell **Cloning vector, a small piece of DNA into which a foreign DNA fragment can be inserted for cloning purposes **Shuttle vector, a plasmid constructed so that it can propagate in two different host species **Viral vector, a tool commonly used by molecular biologists to deliver genetic materials into cells Computer science *Vector, a one-dimensional array data structure **Distance-vector routing protocol, a class of routing protocols **Dope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viral Vector
Viral vectors are tools commonly used by molecular biologists to deliver genetic material into cells. This process can be performed inside a living organism (''in vivo'') or in cell culture (''in vitro''). Viruses have evolved specialized molecular mechanisms to efficiently transport their genomes inside the cells they infect. Delivery of genes or other genetic material by a vector is termed transduction and the infected cells are described as transduced. Molecular biologists first harnessed this machinery in the 1970s. Paul Berg used a modified SV40 virus containing DNA from the bacteriophage λ to infect monkey kidney cells maintained in culture. In addition to their use in molecular biology research, viral vectors are used for gene therapy and the development of vaccines. Key properties of a viral vector VIRAL VECTORS are tailored to their specific applications but generally share a few key properties. *''Safety'': Although viral vectors are occasionally created from pathog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euclidean Vector
In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) is a geometric object that has magnitude (or length) and direction. Vectors can be added to other vectors according to vector algebra. A Euclidean vector is frequently represented by a '' directed line segment'', or graphically as an arrow connecting an ''initial point'' ''A'' with a ''terminal point'' ''B'', and denoted by \overrightarrow . A vector is what is needed to "carry" the point ''A'' to the point ''B''; the Latin word ''vector'' means "carrier". It was first used by 18th century astronomers investigating planetary revolution around the Sun. The magnitude of the vector is the distance between the two points, and the direction refers to the direction of displacement from ''A'' to ''B''. Many algebraic operations on real numbers such as addition, subtraction, multiplication, and negation have close analogues for vectors, operations whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vector Space Model
Vector space model or term vector model is an algebraic model for representing text documents (and any objects, in general) as vectors of identifiers (such as index terms). It is used in information filtering, information retrieval, indexing and relevancy rankings. Its first use was in the SMART Information Retrieval System. Definitions Documents and queries are represented as vectors. :d_j = ( w_ ,w_ , \dotsc ,w_ ) :q = ( w_ ,w_ , \dotsc ,w_ ) Each dimension corresponds to a separate term. If a term occurs in the document, its value in the vector is non-zero. Several different ways of computing these values, also known as (term) weights, have been developed. One of the best known schemes is tf-idf weighting (see the example below). The definition of ''term'' depends on the application. Typically terms are single words, keywords, or longer phrases. If words are chosen to be the terms, the dimensionality of the vector is the number of words in the vocabulary (the number of dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vector W2
The Vector W2 was a fully functional concept car intended for production constructed by Vector Motors in 1978. It had a Bosch fuel injected twin-turbocharged 350 cid (5.7 L) aluminum Chevrolet V8 engine that produced over 600 hp (450 kW) and over 600 ft·lbf (800 N·m) of torque. The top speed was a claimed 242 mph (389 km/h). The name comes from the "W" for Jerry Wiegert (designer and founder of Vector Motors) and "2" for the number of turbochargers. Over the time prior to production the car went through a number of improvements in performance, technology, updated styling exercises, as well as color changes. The car was displayed at international auto shows worldwide, and featured in many automotive publications. Between 1978 and 1987, Wiegert attempted to raise the money to start series of the car. In its lifetime, the car covered over in testing, more than any other concept car. In 1989, the final version of the W2 went into production as the Vec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vector M12
The Vector M12 is a sports car manufactured by Vector Aeromotive under parent company Megatech, and was the first car produced after the hostile takeover of the company from Jerry Wiegert by the Indonesian company Megatech. The model was produced from 1995 to 1999, when production was halted due to slow sales of the car. The production totaled 17 units including the prototypes. History and specifications The car was based on the Lamborghini Diablo utilising most of its mechanical components and its V12 engine as Megatech owned Lamborghini at that time and took such steps to produce the car in higher volumes at a low cost. The engine was centrally mounted in front of the gearbox rather than behind it as in the Lamborghini. The styling was a loose copy of the AWX-3, which was a still born project due to the Megatech takeover and later infringed by former company owner Wiegert after he initiated lawsuits and patented the designs to avoid them being reused. The new owners, Megat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vector Motors
Vector Motors Corporation is an American automobile manufacturer originally based in Wilmington, California. Its history can be traced to Vehicle Design Force, which was founded in 1978 by Gerald Wiegert."Vector Aeromotive Corporation - Corporate Backgrounder", The Vector Aeromotive Corporation, prepared by Kalmann Communications, 1990, contributed by the Vector Aeromotive Corporation Vehicle production by Vector Aeromotive began in 1989 and ceased in 1993. The company was later revived as Vector Motors Corporation, and has continued to develop sports cars. When founded, Vector represented America's first attempt to compete with European performance car manufacturers such as Ferrari and Lamborghini. Altogether around 50 Vector sports car models were developed and produced during the 1980s and 1990s including some racing versions mostly built using American made components. Nearly every car produced by the company is designated the letter "W" (for Wiegert) and a number. A letter " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saab 9-3
The Saab 9-3 (pronounced ''nine-three'') is a compact executive car initially developed and manufactured by the Swedish automaker Saab. The first generation 9-3 (1998-2003) is based on the GM2900 platform, changing to the GM Epsilon platform with the introduction of the second-generation car (2003-2012). Other vehicles using this platform include the Opel Vectra, Chevrolet Malibu, and Cadillac BLS. Saab's last owners, National Electric Vehicle Sweden (NEVS), assembled the 9-3 sedan as Saab's only model. Overview The car was badged as 93 starting in the 1998 model year when Saab revised the naming strategy of their small car to match that of their larger 95. The model was marketed as 9-3, pronounced as "nine three.” The Saab 9-3 was launched in 1998 for the 1999 model year essentially as a rebadged second-generation Saab 900 (1994–1998 model) and succeeded by a redesigned 9-3 for the 2003 model year. It is not to be confused with the Saab 93 (pronounced "ninety-three"), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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