Estimador do Tipo Núcleo para Densidades Limites de Cadeias de Markov com Espaço de Estados Geral

In this work we studied the consistency for a class of kernel estimates of f f (.) in the Markov chains with general state space E C Rd case. This study is divided into two parts: In the first one f (.) is a stationary density of the chain, and in the second one f (x) v (dx) is the limit distribution of a geometrically ergodic chain

Estimadores do tipo núcleo para a densidade de transição de uma cadeia de markov com espaço de estados geral

In this work, we studied the strong consistency for a class of estimates for a transition density of a Markov chain with general state space E ⊂ Rd. The strong ergodicity of the estimates for the density transition is obtained from the strong consistency of the kernel estimates for both the marginal density p(:) of the chain and the joint density q(., .). In this work the Markov chain is supposed to be homogeneous, uniformly ergodic and possessing a stationary density p(.,.)

As estratégias de negação variantes no inglês falado: uma comparação com o português

The general aim of this work is to verify the occurence of variant forms of negation in spoken English with the purpose of making a comparative study between the English and the Portuguese languages. As for Portuguese, we used as a matter of reference a study already made on negation. As for English, we analized a corpus of the North American English variant organized by a university in the United States. This study is based on the North American Functional Linguistics theoretical perspective, which considers relevant the study of language used in real situations of communicative interaction. The data analisys proved that there is at least one form of negative variant in spoken English which is not allowed by prescriptive grammar. This phenomenon turns out to be similar to Portuguese, which includes three variant strategies. According to the data obtained, it was possible to verify that the variant strategy used in English, from a contrastive point of view, corresponds to a negative strategy ruled by Portuguese prescriptive grammar. Finally, we discussed about the different conceptions of language, grammar and teaching, giving suggestions to colaborate to a productive and reflexive teaching of first or second language