In this article, a new Runge-Kutta-Nyström method is derived. The new RKN method has zero phase-lag, zero amplification error and zero first derivative of phase-lag. This method is basically based on the sixth algebraic order Runge-Kutta-Nyström method, which has proposed by Dormand, El-Mikkawy and Prince. Numerical illustrations show that the new proposed method is much efficient as compared w...

In recent years, the description logic EL has received a significant interest. The description logic EL is a knowledge representation formalism used e.g in natural language processing, configuration of technical systems, databases and biomedical ontologies. Unification is used there as a tool to recognize equivalent concepts. It has been proven that unification in EL is NP-complete. This result...

In this paper, we introduce the tractable pf -EL logic, a paraconsistent version of the fuzzy logic f -EL. Within pf -EL, it is possible to tolerate contradictions under incomplete and vague knowledge. pf -EL extends the f -EL language with a paraconsistent negation in order to represent contradictions. This paraconsistent negation is defined under Belnap’s bilattices. It is important to observ...

This paper presents two matrix factorizations for recursive pruned discrete cosine transforms. Both factorizations have lower computational complexity when compared to the method of El-Sharkawy and Eshmawy (1995). ( 1998 Elsevier Science B.V. All rights reserved.

Este trabajo presenta un sistema de producción esbelto basado en reglas de asignación de recursos. El procedimiento adoptado controla el número de unidades (inventario en proceso) que pasan por el proceso productivo y selecciona el recurso que tiene la capacidad potencial de despachar el producto (después de procesamiento) en el tiempo esperado más próximo. Para explicar mejor el proceso y el p...

Resumen: Este artículo describe el impacto de un algoritmo de Desambiguación de Sentidos de Palabras (WSD) para nombres en AliQAn, el sistema de Question Answering con el cual hemos participado en el CLEF-2005. Al aplicar el WSD tradicional, el rendimiento se decrementa en un 4.7% en el Mean Reciprocal Rank (MRR). Para resolver este problema, proponemos dos aplicaciones de WSD: (1) elegir un gr...

5. Friedman GD, Klatsky AL, Siegelaub AB: Lung function and risk of myocardial infarction and sudden cardiac death. N Engl J Med 294: 1071, 1976 6. Mantel N, Haenszel W: Statistical aspects of the analysis of data from retrospective studies of disease. J Natl Cancer Inst 22: 719, 1959 7. Chiang CL: Standard error of the age-adjusted death rate. US DHEW, PHS, Vital Statistics Special Reports. Se...

The genomes of the recently described Matlab variants of Vibrio cholerae O1 that are hybrids between classical and El Tor biotypes were compared with those of El Tor and classical biotypes by the use of pulsed-field gel electrophoresis. Dendrograms constructed using the unweighted-pair group method using average linkages generated from NotI restriction patterns of whole-chromosomal DNA grouped ...

This demo will present the advantages of the new, bookkeeping-free method for incremental reasoning in OWL EL on incremental classification of large ontologies. In particular, we will show how the typical experience of a user editing a large ontology can be improved if the reasoner (or ontology IDE) provides the capability of instantaneously re-classifying the ontology in the background mode wh...