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The notation () indicates an autoregressive model of order p.The AR(p) model is defined as = = + where , …, are the parameters of the model, and is white noise. [1] [2] This can be equivalently written using the backshift operator B as
The notation ARMAX(p, q, b) refers to a model with p autoregressive terms, q moving average terms and b exogenous inputs terms. The last term is a linear combination of the last b terms of a known and external time series d t {\displaystyle d_{t}} .
Random variables are usually written in upper case Roman letters, such as or and so on. Random variables, in this context, usually refer to something in words, such as "the height of a subject" for a continuous variable, or "the number of cars in the school car park" for a discrete variable, or "the colour of the next bicycle" for a categorical variable.
Of all the existing national television stations, the public broadcaster Radio Televizioni Shqiptar (RTSH) has the greatest reach: its signal covers 80.5% of the territory, followed by Top Channel with 79%, and TV Klan with 78%. However, there are also digital multiplexes but they are unaccounted for in the territorial reach figures.
Polynomials of the lag operator can be used, and this is a common notation for ARMA (autoregressive moving average) models. For example, = = = (=) specifies an AR(p) model.A polynomial of lag operators is called a lag polynomial so that, for example, the ARMA model can be concisely specified as
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In recent years, RTSH has upgraded TV studios and broadcasting equipment, launched a number of digital TV channels, added live online TV and radio streams, and has uploaded TV programs on YouTube. Their old YouTube channel with dozens of videos was shut down in June 2021, losing historical documentaries and a new one was created which holds ...
The channel's founding logo until 2021. Originally, the channel was going to be called DigiNews. [citation needed] The channel began experimental broadcasts on December 18, 2006.