High Speed Switching
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Heuristic solutions related to challenges of optical burst switching paradigm
Several optical network switching paradigms have been under intensive research to support rapidly increasing bandwidth requirements. Of all these paradigms, optical burst switching (OBS) is a promising switching paradigm for the next-generation Internet infrastructure. Despite the significant contributions of OBS to high speed networks such as dynamic connec
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2011-12
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2. Projeto de filtros para atenuação de correntes de modo comum e de sobretensões em acionamentos de motores elétricos utilizando inversores PWM
The use of inverters in most of electrical motor drives applications has been accompanie by several undesirable effects, such as overvoltage at the motor terminals, circulation of common mode currents and electromagnetic interference problems. The determining factors for most of these problems come with the high switching speed and frequency of the semicondu
Publicado em: 2010
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3. Acionamento vetorial de motores de indução trifásicos com enfraque-cimento de campo e maximização do conjugado por ampère
This work investigates the operation of three phase induction motors in field weakening and high speed regions. Maximum torque per ampère is imposed by using an indirect vector control strategy. Mathematical models that accounts for magnetic saturation is used for simulations and adjustment of controllers used in control algorithm. The driving structure is
Publicado em: 2008
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4. Design of high-speed networks considering monofractal and multifractal traffic models.
Fractal traffic models capture uniquely statistical scaling characteristics and the burstiness of the real network traffic. The impact of such traffic models on existing networks has been studied extensively in the related literature and the relevance of such analysis to dimension the necessary resources and evaluate correctly the performance of these system
Publicado em: 2007
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5. Proposal and performance analysis of a combined input and output queuing packet switch / Proposta e analise de desempenho de um comutador de pacotes com enfileiramentos na entrada e na saida
A QoS (Quality of Service) provisioned CIOQ (Combined Input Output Queuing) switch using crossbar structure with m parallel lines per output port is proposed in this work. The packets at input buffers are transferred to the output buffers by means of mxN internal lines. Since all internal lines have the same speed as external links, no internal clock speedup
Publicado em: 2006
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6. MULTICAST COMMUNICATION IN OPTICAL IP INTERNETWORKS / DIFUSÃO SELETIVA EM INTER-REDES IP BASEADAS EM REDES ÓPTICAS
Multicast communication and recent advances in optical technology, most specifically in Wavelength Division Multiplexing (WDM), allied with the consolidation of IP as the dominant protocol of convergent networks, offer new perspectives for the next generation Internet. This thesis utilises these technologies to propose a set of adaptations, called MIRROR, to
Publicado em: 2003
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7. O uso do EDGE nos sistemas celulares em direÃÃo à 3 geraÃÃo
Nowadays, mobile communications market is being driven by the need of data services. Among the systems of the first and second generation (1G and 2G), GSM (Global Mobile System) is undoubtedly the most used in all world for voice applications, however, it continues offering data services with low bit rates, which in parallel with the low capacities of the sy
Publicado em: 2002
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8. Tuning and switching a DNA polymerase motor with mechanical tension
Recent single-molecule experiments reveal that mechanical tension on DNA can control both the speed and direction of the DNA polymerase motor. We present a theoretical description of this tension-induced “tuning” and “switching.” The internal conformational states of the enzyme motor are represented as nodes, and the allowed transitions between s
National Academy of Sciences.
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9. Kinetics of thin filament activation probed by fluorescence of N-((2-(Iodoacetoxy)ethyl)-N-methyl)amino-7-nitrobenz-2-oxa-1, 3-diazole-labeled troponin I incorporated into skinned fibers of rabbit psoas muscle: implications for regulation of muscle contraction
Making use of troponin with fluorescently labeled troponin I subunit (N-((2-(iodoacetoxy)ethyl)-N-methyl)amino-7-nitrobenz-2-oxa-1, 3-diazole-troponin I, IANBD-TnI) that had previously been described in solution studies as a probe for thin filament activation (. Proc. Natl. Acad. Sci. 77:7209-7213), we present a new approach that allows the kinetics of thin
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10. Dissociation of hypoxia-induced chemosensory responses and catecholamine efflux in cat carotid body superfused in vitro.
1. To examine the correlation between chemosensory response and dopamine release induced by hypoxic stimulation, we studied carotid bodies excised from anaesthetized cats. 2. The carotid bodies with their carotid (sinus) nerves were superfused in vitro with modified Tyrode solution (pH 7.40, at 37.5 degrees C) equilibrated with 20 or 100% O2. The PO2 of the