Profile of conjugate gradient method algorithm on the performance appraisal for a fuzzy system
April 2009
The formalism of Minkwosky’s inequality in Omolehin (2007a) is used in this work fundamentally to generate the fuzzy model for system performance appraisal in two public examinations in Nigeria. The Conjugate Gradient Method Algorithm (CGM) is employed to evaluate the validity of our results from the large system fuzzy performance. Results showed that our methods are credible and...
Development of a mathematical model for error propagation in engineering calculations involving many variables function
April 2009
In this research, a mathematical model for error propagations in many variables functions had been developed. The development employs both Taylor theorem and binomial coefficient of expansion. Verification of the models were done through computer simulation by comparing the results of the model with the actual difference between the result given by the function in question, when computed...
Some affine connexions in a generalized structure manifold
April 2009
In this paper we have studied some affine connexions in a generalised structure manifold. Certain theorems are have also been proved, which are of great geometrical importance. Key words: C∞-manifold, generalised structure, generalised metric structure, F- structure, π structure, AMS Subject Classification Number: 53
A simple experimental verification for Einstein’s variance of mass with velocity equation
April 2009
Mathematical model of ecological disturbances in the oil rich Niger Delta region of Nigeria
March 2009
An important class of interactions between biological species is the stability. We investigate the ecological, biological and economical impacts of petroleum exploration on the Niger Delta region of Southern Nigeria. A modified reaction-diffusion model describing the spread of the predators into the prey populations is adopted to establish the interaction between the parties involved. An attempt was made to...
On two-sample test for detecting differences in the IFR property of life distributions
March 2009
A test proposed for testing whether one distribution is more Increasing Failure Rate (IFR) than another, based on a measure of IFR is presented in this paper. The asymptotic normality of the proposed test statistic was also established. The asymptotic null variance from the data was estimated since the variance depends on the unknown distribution. The Pitman asymptotic efficacies of the proposed test...
An empirical optimal portfolio selection model
February 2009
We consider risk arising from changes in the prices of financial assets. We propose a risk measure based on asymptotic power law behaviour for optimal portfolio selection in a single period. We apply this measure to compute explicitly the optimal portfolio when the underlying security prices follow a Weibull distribution. An illustrative example is given. Key words: Asymptotic power law,...
Reliability equivalence factors for some systems with mixture weibull failure rates
February 2009
In this article, the failure rates of the system's components are functions of time t. We study two cases (i) the mixture of two stages of life time distribution with weibull failure rates, (ii) the mixture of two stages failure rates with weibull distribution. The reliability equivalence factors of some systems with identical components are obtained. Two different methods are used to improve the...
Multi agent system for resource allocation and monitoring
October 2008
The objective of this paper is to present a model that uses Multi Agent Technology to assist Fund Allocating Agencies (FAA) to allocate limited funds to most deserving among competing organizations called Fund Seekers (FS) and monitoring the utilization of allocated funds. These funds are given to execute their projects in Research and Development or to impart quality education. In India, the beneficiaries of...
Conjugate gradient method for non-positive definite matrix operator
October 2008
The conjugate Gradient Method relies on symmetric positive definite property of a matrix operator. In this work, we investigate and establish the case of non-positive symmetric matrix operator using various forms of conversions and transformations on the operator. Key words: Hilbert Space, Positive Symmetric Matrix, Quadratic Functional, Conjugate, Gradient Method.
Thermal modeling and performance evaluation of arch shape greenhouse for nursery raising
August 2008
This paper presents mathematical model for predicting thermal environment inside the arch shape greenhouse. Predicted thermal environment inside the greenhouse helped to select the crop nursery for growing inside the greenhouse. Actual thermal environment inside the greenhouse compared with predicted thermal environment. Experimental and predicted values of greenhouse temperature were almost same with...
Dual factor routing protocol for mobile ad hoc networks
August 2008
Mobile ad hoc networking works properly only if the participating nodes cooperate in routing and forwarding. In this work, the question of how to enable a system to operate despite the presence of misbehavior node is considered. Node misbehavior due to selfish or malicious reasons or faulty nodes can significantly degrade the performance of mobile ad hoc networks. A new protocol called DUAL Factor is proposed...
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