Science Journal of Applied Mathematics and Statistics

Volume 1, Issue 5, December 2013

  • A New Method for the Model Selection in B-Spline Surface Approximation with an Influence Function

    Hongmei Bao, Kaoru Fueda

    Issue: Volume 1, Issue 5, December 2013
    Pages: 38-46
    Received: Aug. 27, 2013
    Accepted:
    Published: Oct. 20, 2013
    Downloads:
    Views:
    Abstract: In model selection, the most effective method requires much time.The analysis of the bivariate B-spline model with a penalized term has many difficulties.It has many factors and parameters such the number of the knots, the locations of those knots, number of B-spline functions and the value of the smoothing parameter of the penalized term.For the d... Show More
  • Symmetry Analysis to f'''+βff''-αf'2=0 Arising in Boundary Layer Theory

    Salma Mohammad Al-Tuwairqi, Anisa Mukhtar Hassan

    Issue: Volume 1, Issue 5, December 2013
    Pages: 47-49
    Received: Sep. 10, 2013
    Accepted:
    Published: Oct. 20, 2013
    Downloads:
    Views:
    Abstract: In this paper we analyze the boundary layer equation f^'''+βff^''-α〖f'〗^2=0 using a group theoretical method known as symmetry method. We obtain the symmetry group admitted by the boundary layer equation. We then construct exact invariant solutions and outline a symmetry reduction. The invariant solution is examined under common boundary conditions... Show More
  • Research on the Construction of Supply Chain Network Based on Fixed Spread Risk

    Lei Wen, Yachao Shi, Mingfang Guo

    Issue: Volume 1, Issue 5, December 2013
    Pages: 50-53
    Received: Oct. 08, 2013
    Accepted:
    Published: Nov. 10, 2013
    Downloads:
    Views:
    Abstract: Supply chain is an integrated network where suppliers, sellers and customers are highly interconnected through business activities. The basic character of supply chain is complexity, dynamic and growth. In this paper, based on the complex network theory, we build a supply chain network model based on gradual risk. The dynamic growth mechanism of th... Show More
  • Prediction of Academic Manpower System of a Polytechnic Institution in Nigeria

    Ogbogbo, G. O., Ebuh, G. U., Aronu, C. O.

    Issue: Volume 1, Issue 5, December 2013
    Pages: 54-61
    Received: Oct. 12, 2013
    Accepted:
    Published: Nov. 10, 2013
    Downloads:
    Views:
    Abstract: This study is on makovian approach in studying the behaviour of the academic staff grade transition of a Polytechnic institution in Nigeria. The objective of this study is to determine the proportion of staff recruited, promoted and withdrawn from the various grade levels in the institution over the years and also forecast the expected manpower str... Show More
  • Moments of Continuous Bi-Variate Distributions: An Alternative Approach

    Oyeka ICA, Okeh UM

    Issue: Volume 1, Issue 5, December 2013
    Pages: 62-69
    Received: Sep. 29, 2013
    Accepted:
    Published: Nov. 20, 2013
    Downloads:
    Views:
    Abstract: We propose a method of obtaining the moment of some continuous bi-variate distributions with parameters α1 β1 andα2 β2 in finding the nth moment of the variable x^c y^d (c≥0, d≥0) where X and Y are continuous random variables having the joint pdf, f(x,y).Here we find the so called gn(c, d)defined gn(c, d)= E(X^cY^d+λ)^n, the nth moment of expected... Show More
  • Non-Parametric Study of the Attitude of Civil Servants towards Made-in-Nigeria Goods (A Case Study of Owerri Urban, Imo State, Nigeria)

    Iheagwara Andrew Ihuoma

    Issue: Volume 1, Issue 5, December 2013
    Pages: 70-81
    Received: Dec. 10, 2013
    Accepted:
    Published: Jan. 10, 2014
    Downloads:
    Views:
    Abstract: This study tends to analyze the attitude of civil servants towards made-in-Nigeria goods in Owerri Urban, Imo State. It is an attempt to provide a general picture of the level of acceptability of these goods and ways of raising their quality standards so as to increase demand. The analysis using the Chi-square test showed that the opinion of civil ... Show More
  • Longitudinal Studies of Random Effect Model on Academic Performance of Undergraduate Students

    Chukwudi Justine Ogbonna, Opara Jude

    Issue: Volume 1, Issue 5, December 2013
    Pages: 82-97
    Received: Dec. 29, 2013
    Accepted:
    Published: Jan. 30, 2014
    Downloads:
    Views:
    Abstract: This paper discussed the longitudinal studies of random effect model on academic performance of student using Federal University of Technology, Owerri Imo State Nigeria as a case study. Secondary data were adopted for the research work, and a SAS software package was used for the analysis. There appears to be some curvature in the average trend and... Show More