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Autoregressive model. In statistics, econometrics, and signal processing, an autoregressive ( AR) model is a representation of a type of random process; as such, it can be used to describe certain time-varying processes in nature, economics, behavior, etc. The autoregressive model specifies that the output variable depends linearly on its own ...
The notation ARMA(p, q) refers to the model with p autoregressive terms and q moving-average terms.This model contains the AR(p) and MA(q) models,= + = + =. The general ARMA model was described in the 1951 thesis of Peter Whittle, who used mathematical analysis (Laurent series and Fourier analysis) and statistical inference.
The ArmaLite AR-15 [note 3] is a select-fire, [note 1] gas-operated, air-cooled, magazine-fed rifle manufactured in the United States between 1959 and 1964. [10] Designed by American gun manufacturer ArmaLite in 1956, it was based on its AR-10 rifle. The ArmaLite AR-15 was designed to be a lightweight rifle and to fire a new high-velocity ...
An Armalite rifle (AR) is one of a series of rifles the ArmaLite company made or, more generally, a rifle based on one of its designs, such as the ArmaLite AR-15 rifle. Eugene Stoner , Jacques Michault, Melvin Johnson , Robert Fremont, and Jim Sullivan are some of the designers credited with their development. [1]
In econometrics, Prais–Winsten estimation is a procedure meant to take care of the serial correlation of type AR(1) in a linear model.Conceived by Sigbert Prais and Christopher Winsten in 1954, it is a modification of Cochrane–Orcutt estimation in the sense that it does not lose the first observation, which leads to more efficiency as a result and makes it a special case of feasible ...
An AR-15–style rifle is a lightweight semi-automatic rifle based on or similar to the Colt AR-15 design. The Colt model removed the selective fire feature of its predecessor, the original ArmaLite AR-15, itself a scaled-down derivative of the AR-10 design by Eugene Stoner. It is closely related to the military M16 rifle .
The Canadian company Colt Canada (formerly Diemaco) licensed production of a rifle (Colt Model 715) and carbine (Colt Model 725), but later went on to produce an entire line of AR-15/M16 pattern weapons developed independently. In May 2005, Colt's Manufacturing Company acquired Diemaco, and the name was changed to Colt Canada.
The Colt AR-15 is a lightweight, magazine -fed, gas-operated semi-automatic rifle. It is a semi-automatic version of the M16 rifle, sold for civilian and law enforcement markets in the United States. The AR in AR-15 stands for " ArmaLite Rifle", after the company that developed it in the 1950s. [1]