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International Journal of Theoretical and Applied Mathematics

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Volume 3, Issue 4, August 2017

  • Modeling the Movement of Groundwater from the Pits, Surrounded with Tongues of Zhukovsky

    Bereslavckii Eduard Naumovich

    Issue: Volume 3, Issue 4, August 2017
    Pages: 129-137
    Received: 8 May 2017
    Accepted: 1 June 2017
    Published: 21 July 2017
    DOI: 10.11648/j.ijtam.20170304.11
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    Abstract: In the hydrodynamic statement the filtration low from ditches, walled tongues of Zhukovsky is considered. The fluid moves through the layer of soil, underlain by a well-permeable pressure aquifer, which is contained waterproof area on the roof. For study the infiltration to the free surface of groundwater is formulated a mixed multi-parameter bound... Show More
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  • Remodelling of Lee’s Knife Diffraction Loss Model as a Function of Line of Site Percentage Clearance

    Swinton C. Nwokonko, Vital K. Onwuzuruike, Chibuzo Promise Nkwocha

    Issue: Volume 3, Issue 4, August 2017
    Pages: 138-142
    Received: 31 October 2016
    Accepted: 6 January 2017
    Published: 10 October 2017
    DOI: 10.11648/j.ijtam.20170304.12
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    Abstract: In this paper, remodeling of Lee’s piecewise knife diffraction loss model is presented. The original Lee’s piecewise knife diffraction loss model is expressed as a function of Fresnel-Kirchoff diffraction parameter. The computation of the Fresnel-Kirchoff diffraction parameter requires detailed terrain and link parameters. However, for quick link p... Show More
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  • Robust Numerical Resolution of Nakamura Crystallization Kinetics

    Arthur Levy

    Issue: Volume 3, Issue 4, August 2017
    Pages: 143-147
    Received: 1 December 2016
    Accepted: 16 December 2016
    Published: 23 October 2017
    DOI: 10.11648/j.ijtam.20170304.13
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    Abstract: The numerical prediction of crystallization transformation is of great interest in several applications. One such application is the polymer-forming process. In this short communication, the integration of the widely used Nakamura kinetics is discussed. A robust time integration method is proposed. In order to overcome its singularities, the Nakamu... Show More
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  • Power System Stabilizer Application for Load Frequency Control in Hydro-Electric Power Plant

    Ghazanfar Shahgholian

    Issue: Volume 3, Issue 4, August 2017
    Pages: 148-157
    Received: 1 December 2016
    Accepted: 12 January 2017
    Published: 24 October 2017
    DOI: 10.11648/j.ijtam.20170304.14
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    Abstract: Renewable energy provides 20% of electricity generation worldwide. Hydroelectric power is the cheapest way to generate electricity today. It provides almost onefifth of the electricity in world. Hydropower is produced in more than 150 countries. The main objective of this paper is modelling and analysis of the effects of the power system stabilizer... Show More
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