Pure and Applied Mathematics Journal

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Volume 6, Issue 6, December 2017

  • Prediction of Petroleum Price Using Back Propagation Artificial Neural Network Based on Chaotic Self-Adaptive Particle Swarm Algorithm

    Mengshan Li, Genqin Sun, Huaijin Zhang, Keming Su, Bingsheng Chen, Yan Wu

    Issue: Volume 6, Issue 6, December 2017
    Pages: 154-159
    Received: 18 September 2017
    Accepted: 11 October 2017
    Published: 14 November 2017
    DOI: 10.11648/j.pamj.20170606.11
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    Abstract: Petroleum price are affected by some uncertainties and nonlinear factors, how to predict the price effectively is the focus of the present study. In this paper, a 3 layers back propagation artificial neural network model based on particle swarm optimization algorithm combined with chaos theory and self-adaptive weight strategy is developed, the mod... Show More
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  • Some Finiteness Conditions for Strong Semilattice of Semigroups

    Basri Çalişkan

    Issue: Volume 6, Issue 6, December 2017
    Pages: 160-163
    Received: 13 October 2017
    Accepted: 31 October 2017
    Published: 18 December 2017
    DOI: 10.11648/j.pamj.20170606.12
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    Abstract: Let be a strong semilattice of semigroups such that is finite and each be a family of disjoint semigroups. In this article some finiteness conditions which are periodicity, local finiteness and locally finite presentability are considered for . It is proven that a strong semilattice of semigroups is periodic, locally finite, locally finitely presented and residually finite, respectively if and only if is finite and each semigroup is periodic, locally finite, locally finitely presented and residually finite, respectively.
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  • Population Projection of the Districts Noakhali, Feni, Lakhshmipur and Comilla, Bangladesh by Using Logistic Growth Model

    Tanjima Akhter, Jamal Hossain, Salma Jahan

    Issue: Volume 6, Issue 6, December 2017
    Pages: 164-176
    Received: 28 October 2017
    Accepted: 4 December 2017
    Published: 2 January 2018
    DOI: 10.11648/j.pamj.20170606.13
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    Abstract: Uncontrolled human population growth has been posing a threat to the resources and habitats of Bangladesh. Population of different region of Bangladesh has been increasing dramatically. As a thriving country Bangladesh should artistically deal with this issue. This work is all about to estimate the population projection of the districts Noakhali, F... Show More
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  • A Study of Five Parameter Type I Generalized Half Logistic Distribution

    Bello Olalekan Akanji, Sule Ibrahim, Awodutire Phillip Oluwatobi, Olapade Akintayo Kehinde

    Issue: Volume 6, Issue 6, December 2017
    Pages: 177-181
    Received: 29 October 2016
    Accepted: 23 October 2017
    Published: 4 January 2018
    DOI: 10.11648/j.pamj.20170606.14
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    Abstract: In this paper, we obtained a generalized half logistic distribution which is called a five-parameter type I generalized half logistic distribution. The distributional properties of the model such as the cumulative distribution function (cdf), moment, skewness, kurtosis, the median and the mode of the generalized distribution were established and fina... Show More
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