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  • Springer  (3)
  • American Institute of Physics (AIP)  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Phaedrus diagnostic system (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 958-959 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The Phaedrus diagnostic system makes optimum use of probes and miniature gridded energy analyzers to measure detailed parameters such as density, plasma potential, and electron and ion energy. This requires miniaturization and provision for flexible access. Other diagnostics are made as flexible as possible. A multiple-aperture, end-loss analyzer is rotatable, allowing complete mapping of the end wall loss contours. Self-emissive probes are used to measure plasma potential contours in the end plugs. A single-channel neutral energy analyzer is movable and can be swept in energy. Secondary emission detector arrays supplement the neutral energy analyzer and give a measure of the ion energy versus pitch angle. Calibrated diamagnetic loops are used to measure the total plasma energy and its axial extent in each cell. Both permanent and insertable fast ion gauges are available. Completing the diagnostic system is a computerized data-acquisition system that is flexible and receptive to the time varying demands of the many ongoing experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138004
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Optimal expansion of an existing network (1974)
    Springer
    Mathematical programming 6 (1974), S. 197-211 
    Details
    ISSN: 1436-4646
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Given an existing network, a list of arcs which could be added to the network, the arc costs and capacities, and an available budget, the problem considered in this paper is one of choosing which arcs to add to the network in order to maximize the maximum flow from a sources to a sinkt, subject to the budgetary constraint. This problem appears in a large number of practical situations which arise in connection with the expansion of electricity or gas supply, telephone, road or rail networks. The paper describes an efficient tree-search algorithm using bounds calculated by a dynamic programming procedure which are very effective in limiting the solution space explicitly searched. Computational results for a number of medium sized problems are described and computing times are seen to be very reasonable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01580236
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A parametric study of robustness of kriging variance as a function of range and relative nugget effect for a spherical semivariogram (1986)
    Springer
    Mathematical geology 18 (1986), S. 477-488 
    Details
    ISSN: 1573-8868
    Keywords: kriging ; nugget effect ; range ; semivariogram ; geostatistics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract In geostatistics, an estimation of blocks of a deposit is reported along with the variance of error made in their estimation. This calculation is based on the model chosen for the semivariogram of the deposit so that mistakes in its estimation can manifest themselves in the perception of accuracy with which blocks are known. Changes in kriging variance resulting from various amounts of error in modeling the relative nugget effect and range of the semivariogram are investigated for an extensive set of spherical semivariograms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00897500
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  • 4
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    A parametric study of robustness of kriging variance as a function of range and relative nugget effect for a spherical semivariogram (1986)
    Springer
    Details
    Publication Date: 1986-07-01
    Print ISSN: 1874-8961
    Electronic ISSN: 1874-8953
    Topics: Geosciences , Mathematics
    Published by Springer
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