- null field
- Майкрософт: поле с нулевым значением
Универсальный англо-русский словарь. Академик.ру. 2011.
null field
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Null fill — is used in radio antenna systems which are located on mountains or tall towers, to prevent too much of the signal from overshooting the nearest part of intended coverage area. Phasing is used between antenna elements to take power away from the… … Wikipedia
Null dust solution — In mathematical physics, a null dust solution (sometimes called a null fluid) is a Lorentzian manifold in which the Einstein tensor is null. Such a spacetime can be interpreted as an exact solution of Einstein s field equation, in which the only… … Wikipedia
Null (SQL) — The Greek lowercase omega (ω) character is used to represent Null in database theory. Null is a special marker used in Structured Query Language (SQL) to indicate that a data value does not exist in the database. Introduced by the creator of the… … Wikipedia
Null (physics) — In physics a null is a point in a field where the field quantity is zero as the result of two or more opposing quantities completely cancelling each other. The field may be scalar, vector or tensor in nature. Common situations where nulls arise… … Wikipedia
Null corrector — Testing a spherical mirror using an interferometer. All surfaces in the tester are either flat or spherical, so the tester itself is fairly easy to fabricate and test. This setup can test a spherical mirror of any size since the wavefront is… … Wikipedia
Null graph — In the mathematical field of graph theory, the null graph may refer either to the order zero graph, or alternatively, to any edgeless graph (the latter is sometimes called an empty graph). Contents 1 Order zero graph 2 Edgeless graph 3 See also … Wikipedia
Null-Promille-Grenze — Polizeikontrolle am Rügendamm. Das Fahren unter dem Einfluss psychoaktiver Substanzen, die die Fahrtüchtigkeit beeinflussen (Alkohol, andere Drogen oder spezielle Medikamente) Rechtsbegriff in Deutschland: „Trunkenheit im Verkehr“ ist in fast… … Deutsch Wikipedia
Algebraic number field — In mathematics, an algebraic number field (or simply number field) F is a finite (and hence algebraic) field extension of the field of rational numbers Q. Thus F is a field that contains Q and has finite dimension when considered as a vector… … Wikipedia
Motion field — In computer vision the motion field is an ideal representation of 3D motion as it is projected onto a camera image. Given a simplified camera model, each point (y1,y2) in the image is the projection of some point in the 3D scene but the position… … Wikipedia
Zero-point-field — Die Nullpunktsenergie eines quantenmechanischen Systems ist die Energie seines Grundzustands, der niedrigste Eigenwert des Energieoperators. Sie kann als Konsequenz der heisenbergschen Unschärferelation aufgefasst werden, welche besagt, dass der… … Deutsch Wikipedia
vision null — vision obscure the existence of scotomas in the field of vision of which the patient is not aware … Medical dictionary
