This is a survey of the information criterion approach to model selection problems. New results about context tree estimation and the estimation of the basic neighborhood of Markov random fields are also mentioned. 1. The model selection problem Let a stochastic process {Xt, t ∈ T } be given, where each Xt is a random variable with values a ∈ A, and T is an index set. The joint distribution of ...

Using data from 1387 lakes collected over three decades, we found a wide range in the concentrations of total phosphorus (TP), total nitrogen (TN) and chlorophyll in Florida lakes, and that edaphic factors as outlined by the USEPA’s Florida Lake Regions were the dominant factor in determining the concentrations of plant nutrients in the state’s lakes. The hypothesis that all eutrophic lakes in ...

this study determines the impact of e-commerce (ec) on some of important economic criteria including total factor productivity( tfp) of iran country as a developing country in comparison with us standard as a developed country through analyzing and calculating interrelated issues. the model is based on both econometrics and growth accounting approach to fill the gaps of previous studies. on the...

In the late 1980s and 1990s, the rise in the need for increasingly sophisticated security in information systems led to the creation of standards such as TCSEC, ITSEC and CTCPEC to aid in the assessment of security products for their suitability in the protection of national security. These standards have evolved into the Common Criteria: a set of fundamental principles with a basis in best pra...