Theory — The word theory has many distinct meanings in different fields of knowledge, depending on their methodologies and the context of discussion.In science a theory is a testable model of the manner of interaction of a set of natural phenomena,… … Wikipedia
Signal element — In signal theory, a signal element is a part of a signal that is distinguished by its: *duration, *magnitude, *nature (the modulation technique used to create the element), *relative position to other elements, *transition from one signal state… … Wikipedia
Signal processing — is an area of systems engineering, electrical engineering and applied mathematics that deals with operations on or analysis of signals, in either discrete or continuous time. Signals of interest can include sound, images, time varying measurement … Wikipedia
Signal — Signal, signals, signaling, or signalling may refer to: Scientific concepts * Signal (electrical engineering), a physical quantity that can carry information. * Signal processing, the field of techniques used to extract information from signals * … Wikipedia
Signal enhancement by extravascular water protons — Signal Enhancement by Extravascular water Protons, or SEEP, is a contrast mechanism for functional magnetic resonance imaging (fMRI), which is an alternative to the more commonly employed BOLD (blood oxygen level dependent) contrast. This… … Wikipedia
Signal crime — is a concept in reassurance policing. It centres around the theory that certain crimes or incidents of anti social behaviour may act as a signal to a community that they are at risk. Examples commonly given are vandalism of phone boxes and bus… … Wikipedia
Signal (electrical engineering) — In the fields of communications, signal processing, and in electrical engineering more generally, a signal is any time varying or spatial varying quantity. In the physical world, any quantity measurable through time or over space can be taken as… … Wikipedia
Signal-flow graph — A signal flow graph (SFG) is a special type of block diagram[1] and directed graph consisting of nodes and branches. Its nodes are the variables of a set of linear algebraic relations. An SFG can only represent multiplications and additions.… … Wikipedia
signal — Synonyms and related words: ALGOL, COBOL, CRT spot, DM display, Doppler signal, EDP, FORTRAN, IF signal, IM display, RF echoes, Roman candle, Teletype, Wirephoto, aid to navigation, alarm, alert, alphabetic data, alphanumeric code, amber light,… … Moby Thesaurus
Signal-to-noise ratio — For signal to noise ratio in statistics, see Cohen s d. Signal to noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined… … Wikipedia
