Results 51 to 60 of about 767,182 (284)

Towards a Context-Free Machine Universal Grammar (CF-MUG) in Natural Language Processing

open access: yesIEEE Access, 2020
In natural language processing, semantic document exchange ensures unambiguity and shares the same meaning for documents sender and receiver cross different natural languages (e.g., English to Chinese), this difference makes the translation between ...
Quanyi Hu   +3 more
doaj   +1 more source

A Fuzzy Approach to Erroneous Inputs in Context-Free Language Recognition [PDF]

open access: yes, 1995
Using fuzzy context-free grammars one can easily describe a finite number of ways to derive incorrect strings together with their degree of correctness. However, in general there is an infinite number of ways to perform a certain task wrongly.
Asveld, P.R.J.
core   +5 more sources

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

The categorical contours of the Chomsky-Sch\"utzenberger representation theorem [PDF]

open access: yesLogical Methods in Computer Science
We develop fibrational perspectives on context-free grammars and on nondeterministic finite-state automata over categories and operads. A generalized CFG is a functor from a free colored operad (aka multicategory) generated by a pointed finite species ...
Paul-André Melliès, Noam Zeilberger
doaj   +1 more source

!-Graphs with Trivial Overlap are Context-Free [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2015
String diagrams are a powerful tool for reasoning about composite structures in symmetric monoidal categories. By representing string diagrams as graphs, equational reasoning can be done automatically by double-pushout rewriting.
Aleks Kissinger, Vladimir Zamdzhiev
doaj   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

open access: yesFEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

Temporal Logic and Model Checking for Operator Precedence Languages [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2018
In the last decades much research effort has been devoted to extending the success of model checking from the traditional field of finite state machines and various versions of temporal logics to suitable subclasses of context-free languages and ...
Michele Chiari   +2 more
doaj   +1 more source

Analysis of derivational process from the perspective of the morpheme-based morphology theory in kurdish and persian

open access: yesگۆڤارا زانستێن مرۆڤایەتی یا زانكۆیا زاخۆ, 2023
The main purpose of this study is to present the derivational process in the analysis of Kurdish and Persian words from the perspective of the morpheme-based morphological theory of how morphemes are arranged together to form words.
دەریا حەمەد   +2 more
doaj   +1 more source

On periodic points of free inverse monoid endomorphisms

open access: yes, 2012
It is proved that the periodic point submonoid of a free inverse monoid endomorphism is always finitely generated. Using Chomsky's hierarchy of languages, we prove that the fixed point submonoid of an endomorphism of a free inverse monoid can be ...
Rodaro, Emanuele, Silva, Pedro V.
core   +1 more source

LDAcoop: Integrating non‐linear population dynamics into the analysis of clonogenic growth in vitro

open access: yesMolecular Oncology, EarlyView.
Limiting dilution assays (LDAs) quantify clonogenic growth by seeding serial dilutions of cells and scoring wells for colony formation. The fraction of negative wells is plotted against cells seeded and analyzed using the non‐linear modeling of LDAcoop.
Nikko Brix   +13 more
wiley   +1 more source

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