- frequency region
- диапазон частот
Авиасловарь. М.А.Левин. 2004.
Авиасловарь. М.А.Левин. 2004.
high-frequency region — aukštųjų dažnių sritis statusas T sritis automatika atitikmenys: angl. high frequency region vok. Hochfrequenzgebiet, n rus. область высоких частот, f pranc. domaine des hautes fréquences, m … Automatikos terminų žodynas
Region growing — is one of the simplest region based image segmentation methods and it can also be classified as one of the pixel based image segmentations because it involves the selection of initial seed points.This approach to segmentation examines the… … Wikipedia
Frequency comb — A frequency comb is the graphic representation of the spectrum of a mode locked laser. An octave spanning comb can be used for mapping radio frequencies into the optical frequency range or it can be used to steer a piezoelectric mirror within a… … Wikipedia
Frequency allocation — The electromagnetic spectrum is an aspect of the physical world which, like land, water, and air, is subject to usage limitations. Use of radio frequency bands of the electromagnetic spectrum is regulated by governments in most countries, in a… … Wikipedia
Frequency distribution — In statistics, a frequency distribution is an arrangement of the values that one or more variables take in a sample. Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval, and… … Wikipedia
Region of interest — A Region of Interest, often abbreviated ROI, is a selected subset of samples within a dataset identified for a particular purpose.For example:* on a waveform (1D dataset), a time or frequency interval * on an image (2D dataset), the boundaries of … Wikipedia
Utility frequency — The waveform of 230 volt, 50 Hz compared with 110 V, 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency at which alternating current (ac, also AC) is transmitted from a… … Wikipedia
Amateur radio frequency allocations — Amateur radio frequency allocation is done by national telecommunications authorities. Globally, the ITU oversees how much radio spectrum is set aside for amateur radio transmissions. Radio amateurs use a variety of transmission modes, including… … Wikipedia
Ultra high frequency — (UHF) designates a range (band) of electromagnetic waves with frequencies between 300 MHz and 3 GHz (3,000 MHz). Also known as the decimeter band or decimeter wave as the wavelengths range from ten to one decimeters. Radio waves with frequencies… … Wikipedia
High Frequency Active Auroral Research Program — HAARP is often confused with Project HARP, the High Altitude Research Project (a joint project of The Pentagon and the Canadian Department of National Defence).The High Frequency Active Auroral Research Program (HAARP) is an investigation project … Wikipedia
UMTS frequency bands — or frequency ranges are the radio spectrum frequencies designated for the operation of the UMTS / HSDPA / HSUPA / HSPA+ system for mobile phones. UMTS FDD UMTS FDD is designed to operate in the following paired bands:Deployment in other frequency … Wikipedia