phase

  • 161Phase de la lune — Phase lunaire En astronomie, une phase lunaire désigne une portion de Lune illuminée par le Soleil et vue à partir de la Terre. La Lune tournant en orbite autour de la Terre, les positions relatives du Soleil, de la Terre et de la Lune changent… …

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  • 162Phase distortion synthesis — is a synthesis method introduced in 1984 by Casio in its CZ range of synths, and similar to Frequency modulation synthesis in the sense that they are both built on phase modulation. Basically a sine wave is played, but by modifying the phase… …

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  • 163Phase fired controllers — Phase control (PFC), also called phase cutting, is a method of pulse width modulation (PWM) for power limiting, applied to AC voltages. It works by modulating a thyristor, SCR, triac, thyratron, or other such gated diode like devices into and out …

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  • 164Phase geometrique — Phase géométrique En mécanique quantique, une phase géométrique est un nombre complexe de module unité par lequel est multiplié le vecteur d état (ou la fonction d onde) d un système physique dont on a fait varier un paramètre de façon… …

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  • 165Phase-contrast imaging — Phase contrast imaging, or – more casually – High Resolution (HR) imaging, is a method of imaging in Transmission Electron Microscopy (TEM). The ability to image using phase contrast is one of the key elements which differentiates Transmission… …

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  • 166Phase compensation — is the correction of phase error (i.e., the difference between the actually needed phase and the obtained phase). A phase compensation is required to obtain stability in an opamp. A capacitor/RC network is usually used in the phase compensation… …

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  • 167Phase-change — cooling Le phase change cooling est un système de refroidissement de matériel informatique basé sur le principe de la pompe à chaleur. Sommaire 1 Principe de fonctionnement 1.1 Montage simple étage 1.2 Montage multi étage : cascad …

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  • 168Phase modulation — (PM) is a form of modulation that represents information as variations in the instantaneous phase of a carrier wave.Unlike its more popular counterpart, frequency modulation (FM), PM is not very widely used. This is because it tends to require… …

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  • 169Phase synchronization — is the process by which two or more cyclic signals tend to oscillate with a repeating sequence of relative phase angles.Phase synchronisation is usually applied to two waveforms of the same frequency with identical phase angles with each cycle.… …

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  • 170Phase Alternated Line — Pour les articles homonymes, voir Pal. &# …

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  • 171Phase Patterns — Genre musique contemporaine Musique Steve Reich Durée approximative 15 minutes Dates de composition 1970 Création 4 mai 1970 Musée Guggenheim de New Yor …

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  • 172Phase alternated line — Pour les articles homonymes, voir Pal. &# …

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  • 173Phase angle (astronomy) — Phase angle in astronomical observations is the angle between the light incident onto an observed object and the light reflected from the object. In the context of astronomical observations, this is usually the angle Sun object observer. For… …

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  • 174Phase Change Random Access Memory — Phase change RAM (Abk.: PCRAM oder PRAM, in einer speziellen Ausführung auch Ovonics Unified Memory / OUM oder chalcogenide RAM / C RAM) ist ein neuartiger nicht flüchtiger Speicher in der Elektronik. Das Wirkprinzip des Speichers ist die… …

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  • 175Phase response — is the relationship between the phase of a sinusoidal input and the output signal passing through any device which accepts input and produces an output signal such as an amplifier or a filter.Amplifiers, filters and other devices are often… …

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  • 176Phase-change random access memory — (Abk.: PCRAM oder PRAM, in einer speziellen Ausführung auch „Ovonics Unified Memory“, OUM, oder „chalcogenide RAM“, C RAM) ist ein neuartiger nicht flüchtiger Speicher in der Elektronik (Stand 2009). Das Wirkprinzip des Speichers ist die Änderung …

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  • 177Phase luteale — Phase lutéale La phase lutéale (ou progestative) est la phase se situant après l ovulation et durant jusqu au 28e jour du cycle ovarien. La phase lutéale se termine donc lorsque la menstruation (période de règles) commence. Au point de vue… …

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  • 178Phase One: Celebrity Take Down — Video by Gorillaz Released 18 November 2002 Recorded 199 …

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  • 179Phase-Comparison Monopulse — Phase interferometry describes a technique that can be used in radar and direction finding applications to accurately estimate the direction of arrival of a signal from the phase difference of the signal measured on two (or more) separated… …

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  • 180Phase retrieval — concerns the solution to the phase problem. Given a complex signal F(k), of amplitude |F(k)|, and phase phi(k):::F(k)=|F(k)|e^{i phi(k)},phase retrieval consists in finding the phase that for a measured amplitude satisfies a set of constraints.… …

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