Science Journal of Applied Mathematics and Statistics

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Volume 7, Issue 4, August 2019

  • A New Analytical Approach for Solving Van der Pol Oscillator

    Md. Abul Kashem Mondal, Md. Helal Uddin Molla, Md. Shamsul Alam

    Issue: Volume 7, Issue 4, August 2019
    Pages: 51-55
    Received: 20 July 2019
    Accepted: 16 September 2019
    Published: 9 October 2019
    DOI: 10.11648/j.sjams.20190704.11
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    Abstract: The Van der Pol oscillator is a nonlinear damping and non-conservative oscillator. Energy is generated at low amplitude and dissipated at high amplitude. This nonlinear oscillator was first introduced by Dutch electrical engineer and physicist B. Van der Pol and it was originally used to investigate vacuum tubes. Nowadays, it is used in both physic... Show More
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  • The Exchangeable Markov Multi-states Growth Process Incorporate with an Artificial Neural Network of Preterm Infants in an Incubator

    Jean Pierre Namahoro, Xiao Haijun

    Issue: Volume 7, Issue 4, August 2019
    Pages: 56-62
    Received: 6 August 2019
    Accepted: 26 August 2019
    Published: 9 October 2019
    DOI: 10.11648/j.sjams.20190704.12
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    Abstract: The standard incubator used to monitor the development of preterm infants, with much attention for random optimization can interrupt the three main parameters (oxygen, environmental temperature, and humidity) responsible for preterm growth. The artificial neural network (ANN) has been recently proposed as a novel technique to control those paramete... Show More
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