American Journal of Physics and Applications

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Volume 2, Issue 4, July 2014

  • Optimizing Back-Propagation Gradient for Classification by an Artificial Neural Network

    Said El Yamani, Samir Zeriouh, Mustapha Boutahri, Ahmed Roukhe

    Issue: Volume 2, Issue 4, July 2014
    Pages: 88-94
    Received: 13 July 2014
    Accepted: 28 July 2014
    Published: 10 August 2014
    DOI: 10.11648/j.ajpa.20140204.11
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    Abstract: In a complex and changing a remote sensing system, which requires taking quick and informed decisions environment, connectionist methods have shown their great contribution in particular the reduction and classification of spectral data. In this context, this paper proposes to study the parameters that optimize the results of an artificial neural n... Show More
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  • 54 Xe and 36Kr Gas Filled Proportional Counters and Characteristic X-Rays Detection

    Hemn, Muhammad Salh, Ari, Maghdid Hamad

    Issue: Volume 2, Issue 4, July 2014
    Pages: 95-103
    Received: 26 July 2014
    Accepted: 18 August 2014
    Published: 30 August 2014
    DOI: 10.11648/j.ajpa.20140204.12
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    Abstract: This study examines several important features of characteristic X-rays, including their production, spectroscopy and interactions with materials. Characteristic X-rays for different elements (29Cu, 42Mo, 47Ag, 56Ba and 65Tb) were obtained from a variable energy X-ray source by using gamma rays around 60 keV from 241Am. It was found that the energy... Show More
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