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  • Gi/G/1 queue  (1)
  • Superfluidity and superconductivity  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Higher order approximations for tandem queueing networks (1996)
    Springer
    Queueing systems 22 (1996), S. 249-276 
    Details
    ISSN: 1572-9443
    Schlagwort(e): Approximations ; Gi/G/1 queue ; MacLaurin series ; tandem queueing networks
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Notizen: Abstract In this paper a higher order approximation for single server queues and tandem queueing networks is proposed and studied. Different from the most popular two-moment based approximations in the literature, the higher order approximation uses the higher moments of the interarrival and service distributions in evaluating the performance measures for queueing networks. It is built upon the MacLaurin series analysis, a method that is recently developed to analyze single-node queues, along with the idea of decomposition using higher orders of the moments matched to a distribution. The approximation is computationally flexible in that it can use as many moments of the interarrival and service distributions as desired and produce the corresponding moments for the waiting and interdeparture times. Therefore it can also be used to study several interesting issues that arise in the study of queueing network approximations, such as the effects of higher moments and correlations. Numerical results for single server queues and tandem queueing networks show that this approximation is better than the two-moment based approximations in most cases.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01149174
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 2
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    Structure of the oxygen-annealed chalcogenide superconductor Fe_{1.08}Te_{0.55}Se_{0.45}O_{x} (2012)
    American Physical Society (APS)
    Details
    Publikationsdatum: 2012-02-07
    Beschreibung: Author(s): Hefei Hu, Jian-Min Zuo, Mao Zheng, James N. Eckstein, Wan Kyu Park, Laura H. Greene, Jinsheng Wen, Zhijun Xu, Zhiwei Lin, Qiang Li, and Genda Gu The as-grown single crystal Fe 1.08 Te 0.55 Se 0.45 with the tetragonal PbO-type structure is nonsuperconducting owing to the excess Fe. Superconductivity is induced after oxygen annealing with an onset and zero resistance transition temperature around 14.5 K and 11.5 K, respectively. The oxygen doping i... [Phys. Rev. B 85, 064504] Published Mon Feb 06, 2012
    Schlagwort(e): Superfluidity and superconductivity
    Print ISSN: 1098-0121
    Digitale ISSN: 1095-3795
    Thema: Physik
    Publiziert von American Physical Society (APS)
    Standort Signatur Erwartet Verfügbarkeit
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