nonlinear variation
81Ultrasound — Not to be confused with Supersonic .Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy,… …
82Time series — Time series: random data plus trend, with best fit line and different smoothings In statistics, signal processing, econometrics and mathematical finance, a time series is a sequence of data points, measured typically at successive times spaced at …
83Errors and residuals in statistics — For other senses of the word residual , see Residual. In statistics and optimization, statistical errors and residuals are two closely related and easily confused measures of the deviation of a sample from its theoretical value . The error of a… …
84Moving average — For other uses, see Moving average (disambiguation). In statistics, a moving average, also called rolling average, rolling mean or running average, is a type of finite impulse response filter used to analyze a set of data points by creating a… …
85Fluorescence correlation spectroscopy — (FCS) is a common technique used by physicists, chemists, and biologists to experimentally characterize the dynamics of fluorescent species (e.g. single fluorescent dye molecules in nanostructured materials, autofluorescent proteins in living… …
86Self-phase modulation — (SPM) is a nonlinear optical effect of light matter interaction.An ultrashort pulse of light, when travelling in a medium, will induce a varying refractive index of the medium due to the optical Kerr effect. This variation in refractive index… …
87Diode modelling — In electronics, diode modelling refers to the mathematical models used to approximate the actual behavior of real diodes to enable calculations and circuit analysis. A diode s I V curve is nonlinear (it is well described by the Shockley diode… …
88Dommages photoréfractifs — Effet photoréfractif L´ effet photoréfractif, ou photoréfractivité, consiste en une modification locale de l’indice d’un milieu par l’onde lumineuse incidente qui l’éclaire. En conséquence, le faisceau lumineux modifie lui même les conditions de… …
89Effet Photoréfractif — L´ effet photoréfractif, ou photoréfractivité, consiste en une modification locale de l’indice d’un milieu par l’onde lumineuse incidente qui l’éclaire. En conséquence, le faisceau lumineux modifie lui même les conditions de sa propagation. Cette …
90Effet photorefractif — Effet photoréfractif L´ effet photoréfractif, ou photoréfractivité, consiste en une modification locale de l’indice d’un milieu par l’onde lumineuse incidente qui l’éclaire. En conséquence, le faisceau lumineux modifie lui même les conditions de… …
