Results 31 to 40 of about 283,476 (338)

Spurious Ambiguity and Focalization [PDF]

open access: yesComputational Linguistics, 2018
Spurious ambiguity is the phenomenon whereby distinct derivations in grammar may assign the same structural reading, resulting in redundancy in the parse search space and inefficiency in parsing.
Glyn Morrill, Oriol Valentín
doaj   +1 more source

A Context-Free Grammar of One Rhythmic Model of Russian Verse

open access: yesМоделирование и анализ информационных систем, 2012
A formal model of the Russian verse based on the accentual segmentation of its structure is offered and considered. A context-free grammar (in N. Chomsky’s sense) which generates correct rhythmic forms of the presented model is constructed.
V. N. Boykov
doaj   +3 more sources

Absence of phase transition in random language model

open access: yesPhysical Review Research, 2022
The random language model, proposed as a simple model of human languages, is defined by the averaged model of a probabilistic context-free grammar. This grammar expresses the process of sentence generation as a tree graph with nodes having symbols as ...
Kai Nakaishi, Koji Hukushima
doaj   +1 more source

Context-Free Tree Grammars are as Powerful as Context-Free Jungle Grammars

open access: yesActa Cybernetica, 2015
Jungles generalize trees by sharing subtrees and allowing garbage. It is shown that IO context-free tree grammars generate the same jungle languages as context-free jungle grammars.
Drewes, F., Engelfriet, J.
openaire   +3 more sources

Equivalent Transformations and Regularization in Context-Free Grammars

open access: yesCybernetics and Information Technologies, 2015
Regularization of translational context-free grammar via equivalent transformations is a mandatory step in developing a reliable processor of a formal language defined by this grammar.
Fedorchenko Ludmila, Baranov Sergey
doaj   +1 more source

Conceptualizing, defining, and assessing pragmatic language impairment in clinical settings: A scoping review

open access: yesInfant and Child Development, Volume 31, Issue 6, November/December 2022., 2022
Abstract There has been significant and extensive knowledge production in the last four decades regarding pragmatic language impairment (PLI) in children with neurodevelopmental disorders. The evidence contained in this literature, however, is contradictory. The present scoping review (ScR) seeks to disentangle competing explanations of conceptualizing,
Ahmed Alduais   +5 more
wiley   +1 more source

Fatgraph models of RNA structure

open access: yesComputational and Mathematical Biophysics, 2017
In this review paper we discuss fatgraphs as a conceptual framework for RNA structures. We discuss various notions of coarse-grained RNA structures and relate them to fatgraphs.We motivate and discuss the main intuition behind the fatgraph model and ...
Huang Fenix   +2 more
doaj   +1 more source

Consistent Unsupervised Estimators for Anchored PCFGs

open access: yesTransactions of the Association for Computational Linguistics, 2020
Learning probabilistic context-free grammars (PCFGs) from strings is a classic problem in computational linguistics since Horning ( 1969 ). Here we present an algorithm based on distributional learning that is a consistent estimator for a large class of ...
Clark, Alexander, Fijalkow, Nathanaël
doaj   +1 more source

On the Order Type of Scattered Context-Free Orderings [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2019
We show that if a context-free grammar generates a language whose lexicographic ordering is well-ordered of type less than ω^2, then its order type is effectively computable.
Kitti Gelle, Szabolcs Iván
doaj   +1 more source

An Online Algorithm for Lightweight Grammar-Based Compression

open access: yesAlgorithms, 2012
Grammar-based compression is a well-studied technique to construct a context-free grammar (CFG) deriving a given text uniquely. In this work, we propose an online algorithm for grammar-based compression.
Masayuki Takeda   +2 more
doaj   +1 more source

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