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stationary unit

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  • Unit root — In time series models in econometrics, a linear stochastic process has a unit root if 1 is a root of the process s characteristic equation. The process will be non stationary. If the other roots of the characteristic equation lie inside the unit… …   Wikipedia

  • Stationary process — In the mathematical sciences, a stationary process (or strict(ly) stationary process or strong(ly) stationary process) is a stochastic process whose joint probability distribution does not change when shifted in time or space. Consequently,… …   Wikipedia

  • Stationary phase approximation — In mathematics, the stationary phase approximation is a basic principle of asymptotic analysis, applying to oscillatory integrals taken over n dimensional space Rn where i is the imaginary unit. Here f and g are real valued smooth functions. The… …   Wikipedia

  • Unit root test — A unit root test tests whether a time series variable is non stationary using an autoregressive model. The most famous test is the Augmented Dickey Fuller test. Another test is the Phillips Perron test. Both these tests use the existence of a… …   Wikipedia

  • stationary anchorage — an orthodontic anchorage in which the resistance to the movement of one or more dental units comes from the resistance to bodily movement of the anchorage unit; a questionable concept of anchorage implying that selected teeth remain stable …   Medical dictionary

  • Multiple-unit train control — Multiple unit train control, sometimes abbreviated to multiple unit or MU, is a method of simultaneously controlling all the traction equipment in a train from a single location, whether it is a Multiple unit comprising a number of self powered… …   Wikipedia

  • Auxiliary power unit — An auxiliary power unit (APU) is a device on a vehicle whose purpose is to provide energy for functions other than propulsion. Different types of APU are found on aircraft, as well as on some large ground vehicles.AircraftFunctions of APU The… …   Wikipedia

  • Distress signal unit — A Distress Signal Unit, or D.S.U , is a piece of equipment used by firefighters while working in hazardous areas. Normally used in conjunction with breathing apparatus, it is a small, battery powered item attached to the breathing apparatus… …   Wikipedia

  • Pleasure Unit — Our Man Flint= Pleasure Unit is the name of several fictional characters in the 1966 sci fi action film Our Man Flint .The trio of mad scientists who lead Galaxy, Dr. Schneider (played by Benson Fong), Dr. Krupov (played by Rhys Williams), and Dr …   Wikipedia

  • Extravehicular Mobility Unit — The Space Shuttle/International Space Station Extravehicular Mobility Unit (EMU) is an independent anthropomorphic system that provides environmental protection, mobility, life support, and communications for a Shuttle or ISS crew member to… …   Wikipedia

  • Egyptian Air Defense Command — The Egyptian Air Defense Command or EADC ( Quwwat El Difaa Al Gawwi in Arabic) is Egypt s military command responsible for air defense. Egypt patterned its Air Defense Force (ADF) after the Soviet Anti Air Defenses, which integrated all its air… …   Wikipedia

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