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  • 1
    Electronic Resource
    Electronic Resource
    Nutritional Variation in Cottonseed, Effect of Autoclaving in Presence and Absence of Gossypol on Solvent Extracted Cottonseed Meal (1954)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 2 (1954), S. 822-826 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf60036a003
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Time-domain simulation of coupled interconnects (2002)
    Bradford : Emerald
    Compel 21 (2002), S. 438-450 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: The paper presents a new technique for the transient analysis and simulation of lossy coupled interconnects. The approach is based on identifying natural modes of oscillation unlike many other transmission-line models which are based on travelling waves. The approach follows directly from that previously presented by the author (Wilcox and Condon 1997) for the simulation of a single-phase coaxial power cable. The technique is readily applicable to modelling coupled interconnects and avoids the time-consuming convolution of many existing transmission-line modelling approaches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321640210423333
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Efficient transient simulation of interconnect networks (2005)
    Bradford : Emerald
    Compel 24 (2005), S. 1230-1240 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Purpose - To provide an efficient and accurate model for interconnect networks characterised by frequency-domain scattering or admittance parameters. The parameters are derived from measurements or rigorous full-wave simulation. Design/methodology/approach - Initially, Hilbert transform relationships are enforced to ensure causality. A reverse Fourier series representation of the discrete data is then converted to the z-domain and from this a state-space formulation is determined. This enables the application of a judiciously chosen model reduction algorithm to obtain an efficient time-domain representation of the network. Findings - Sample results from both simulated and measured data indicate the efficacy of the proposed modelling strategy. For successful implementation of the strategy, it is necessary to employ the Hilbert transform to ensure that a causal impulse response is obtained. Practical implications - The method is applicable to the interconnect networks for which the analytical models cannot be obtained due to the complexity and inhomogeneity of the geometries involved. Originality/value - The work combines in a novel manner aspects from several existing techniques proposed for network simulation and model reduction. The end result is a highly efficient causal, stable and passive representation of the network in question for implementation in a time-domain circuit simulator.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321640510615571
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Closed-loop control of switched reluctance generators (2005)
    Bradford : Emerald
    Compel 24 (2005), S. 662-681 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Purpose - This paper deals with closed-loop control of a switched reluctance generator (SRG). Design/methodology/approach - The control objective when generating is to maintain the dc link voltage at the required value while achieving maximum efficiency. Three possible control schemes are presented and their performance is examined by testing on an experimental 12/8 three-phase SRG. Findings - A very simple control scheme that requires no prior characterisation of the SRG, an approach based on the use of an inverse machine model and finally, a control scheme that is aimed at achieving optimal efficiency are described and experimental results for all three are presented. Research limitations/implications - The inverse machine model control scheme and the optimal efficiency control scheme require operation at a constant voltage reference for accurate operation (although this is the case for many generator applications). Possible future research might include the expansion of these control schemes to operation with a variable voltage reference. Practical implications - The importance of maximising efficiency is emphasised with a clear method of deriving the optimal efficiency firing angles described. Originality/value - This paper provides a good overview of SRG operation through the experimental implementation of three separate closed-loop voltage control schemes, each of which is described in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321640510571156
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A new transmission-line model for time-domain implementation (1997)
    Bradford : Emerald
    Compel 16 (1997), S. 261-274 
    Details
    ISSN: 0332-1649
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: The paper presents a new method of solving the Telegraphers' equations, resulting in a transmission-line model based on natural modes of oscillation. By means of eigenvalue analysis, it is shown how each natural mode can be accessed individually using a linear transformation. Initially, the model is formed in the frequency domain so as to take account of frequency-dependent parameters and losses, notably arising from skin-effect in the conducting paths. It is then shown how the frequency-domain prototype can be transferred into the time domain using third-order z-transform approximations of the exact frequency domain representation. An illustrative case confirms that it is possible to effect the transition from the frequency domain to the time domain with minimal loss of accuracy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/03321649710368070
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    PARAMETER ESTIMATES FOR A GROUND WATER MODEL (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 29 (1993), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : This paper presents a parameter sensitivity study of a two-dimensional flow and transport model of a contaminated site. Hydrogeological and site data from previous investigations were used for calibration. The USGS contaminant transport model (MOC) was used.After flow calibration to establish a reference model, parameters were varied to examine the effect each had on predictions of a contaminant plume. Hydrogeological parameters and a step size parameter were incrementally varied individually. Each result was compared to the reference model output to evaluate changes in concentration values and contaminant plume configuration.The study indicated that a generally predictable trend can be established for some parameters not affected by pumping or similar high stresses. Ranges were identified to relate concentration error or plume change to the amount of parameter error. Some parameter perturbations produced distorted model responses at high stress locations. Porosity and anisotropy were found to be the most influential of the model parameters studied on the plume predictions. (KEY TERMS: ground water hydrology; hydrogeology; pollution modeling; water quality; model calibration.)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1993.tb01507.x
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    Paper (German National Licenses)
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