منابع مشابه
Publications – João Costa Pessoa - 2011
An account of recent research of the groups of Costa Pessoa and Maurya is presented, focusing on the preparation of several polystyrene anchored complexes and their use as catalysts in functionalization of alkenes. The procedures for covalently binding the ligands or ligand precursors are outlined, as well as for coordination of the metal ions. Instrumental techniques used for the characterizat...
متن کاملA comparison of verbal person marking across Tupian languages Uma comparação da marcação verbal de pessoa nas línguas Tupí
this paper explores the diachrony of the verbal person marking system across the large and structurally diverse tupian language family. i argue that the historical development of these different patterns are best informed by analyzing their synchronic distributions with regard to the current evolutionary hypotheses on the family. i apply a parsimony reconstruction model across the topology of t...
متن کاملPublications – João Costa Pessoa - 2008
Short Abstract 3-Formylsalicylic acid (Hfsal) covalently bound to chloromethylated polystyrene (PS) cross-linked with 5% divinylbenzene reacts with DL-alanine and L-isoleucine to give the Schiff-base tridentate ligands PS-H2fsal-DL-Ala and PS-H2fsal-L-isoleu, respectively. These anchored ligands on reaction with VOSO4 and Cu(CH3COO)2.H2O form complexes PS-[VO(fsal-DL-Ala)(H2O)], PS-[Cu(fsal-DLA...
متن کاملe-GRIDS: Computationally Efficient Gramatical Inference from Positive Examples
In this paper we present a new computationally efficient algorithm for inducing context-free grammars that is able to learn from positive sample sentences. This new algorithm uses simplicity as a criterion for directing inference, and the search process of the new algorithm has been optimised by utilising the results of a theoretical analysis regarding the behaviour and complexity of the search...
متن کاملInducción Gramatical Semisupervisada usando Información de Análisis Superficial
Syntactic analysis of texts requires the availability of the grammar underlying the language. The grammar can be obtained from corpora syntactically annotated, but such corpora do not exist for many languages. This has led to a growing interest in unsupervised grammar induction, which does not require such annotations, but provides less accurate results. Aiming at improving the accuracy of this...
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ژورنال
عنوان ژورنال: Revista de Estudos de Língua Portuguesa
سال: 1987
ISSN: 2447-0554
DOI: 10.17851/2447-0554.4.4.76a