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Ontologies play a key role in realizing the full power of etechnology. Ontologies allow for machine-understandable semantics of data, and facilitate the search, exchange, and integration of knowledge for B2B (business-to-business) and B2C (business-to-consumer) e-commerce. Ontology is defined as “the specification of shared knowledge” (Waterson & Preece, 1999). By using semantic data, the usabi...
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We consider the linear and nonlinear Schrödinger equation for a Bose-Einstein condensate in a harmonic trap with PT -symmetric double-delta function loss and gain terms. We verify that the conditions for the applicability of a recent proposition by Mityagin and Siegl on singular perturbations of harmonic oscillator type self-adjoint operators are fulfilled. In both the linear and nonlinear case...
متن کاملActa Polytechnica
We show that, contrary to a claim made in arXiv:1011.0645, the von Neumann-Winger bound states that lie in the continuum of the scattering states are fundamentally different from Naimark’s spectral singularities.
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ژورنال
عنوان ژورنال: Acta Botanica Mexicana
سال: 2017
ISSN: 0187-7151
DOI: 10.21829/abm118.2017.1207