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Global Journal of Mathematical Sciences最新文献

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Maintainability through recruitment in manpower system of changing size 可维护性通过招聘在人力系统的变化规模
Global Journal of Mathematical Sciences Pub Date : 2009-08-19 DOI: 10.4314/GJMAS.V7I2.45179
P. Uche, E. Ossai
{"title":"Maintainability through recruitment in manpower system of changing size","authors":"P. Uche, E. Ossai","doi":"10.4314/GJMAS.V7I2.45179","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I2.45179","url":null,"abstract":"","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114241754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Discrete time model of HIV transmission and the impact of AIDA of economic productivity HIV传播的离散时间模型及AIDA对经济生产力的影响
Global Journal of Mathematical Sciences Pub Date : 2009-08-19 DOI: 10.4314/GJMAS.V7I2.45186
S. Inyama
{"title":"Discrete time model of HIV transmission and the impact of AIDA of economic productivity","authors":"S. Inyama","doi":"10.4314/GJMAS.V7I2.45186","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I2.45186","url":null,"abstract":"","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127424287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance assessment of estimtion methods in genetalized linear models 广义线性模型中估计方法的性能评价
Global Journal of Mathematical Sciences Pub Date : 2009-08-19 DOI: 10.4314/gjmas.v7i2.45190
M. Nja
{"title":"Performance assessment of estimtion methods in genetalized linear models","authors":"M. Nja","doi":"10.4314/gjmas.v7i2.45190","DOIUrl":"https://doi.org/10.4314/gjmas.v7i2.45190","url":null,"abstract":"","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125884669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On certain differential equations with dynamically slowly varying coefficients and with application to dynamic buckling 若干动态慢变系数微分方程及其在动态屈曲中的应用
Global Journal of Mathematical Sciences Pub Date : 2009-08-19 DOI: 10.4314/GJMAS.V7I2.45196
A. Ette
{"title":"On certain differential equations with dynamically slowly varying coefficients and with application to dynamic buckling","authors":"A. Ette","doi":"10.4314/GJMAS.V7I2.45196","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I2.45196","url":null,"abstract":"","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124608832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic programming algorithm for optimum manpower recruitment policy 最优人力招聘策略的动态规划算法
Global Journal of Mathematical Sciences Pub Date : 2009-08-19 DOI: 10.4314/GJMAS.V7I2.45188
S. Ogumeyo, P. Ekoko
{"title":"Dynamic programming algorithm for optimum manpower recruitment policy","authors":"S. Ogumeyo, P. Ekoko","doi":"10.4314/GJMAS.V7I2.45188","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I2.45188","url":null,"abstract":"","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125819732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Controllability Of Nonlinear Neutral Volterra Integrodifferential Systems With Infinite Delay 无穷延迟非线性中立型Volterra积分微分系统的可控性
Global Journal of Mathematical Sciences Pub Date : 2008-12-15 DOI: 10.4314/GJMAS.V7I1.21425
R. Umana
{"title":"Controllability Of Nonlinear Neutral Volterra Integrodifferential Systems With Infinite Delay","authors":"R. Umana","doi":"10.4314/GJMAS.V7I1.21425","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I1.21425","url":null,"abstract":"We establish a set of sufficient conditions for the controllability of nonlinear neutral Volterra integrodifferential systems with infinite delay. The results are established by using the Schauder fixed point theorem. Keywords : Controllability, neutral Volterra integrodifferential system, infinite delay, Schauder fixed point theorem. Global Journal of Mathematical Sciences Vol. 7 (1) 2008: pp. 29-34","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120928091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Uniqueness And Asymptotic Stability For The Radial Solutions Of Semilinear Elliptic Equations 半线性椭圆型方程径向解的唯一性与渐近稳定性
Global Journal of Mathematical Sciences Pub Date : 2008-12-15 DOI: 10.4314/GJMAS.V7I1.21428
S. Sanni
{"title":"Uniqueness And Asymptotic Stability For The Radial Solutions Of Semilinear Elliptic Equations","authors":"S. Sanni","doi":"10.4314/GJMAS.V7I1.21428","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I1.21428","url":null,"abstract":"Less is known of the uniqueness for the radial solutions u=ur of the problem Δu + f(u + ) = 0 in R n (n>2), u (ρ) = 0, u'(0) = 0 besides the cases where lim r→∞ u(r)=0; and for the cases based only on the evolution of the functions f(t) and d dt f(t) t . This paper proves uniqueness for the problem D a +f(u + )=0 (r>0), u(ρ) = 0, u'(0) = 0 based on the assumption that f ∈C 1 ([0,∞)) and that ρ satisfies a boundedness condition. Furthermore, we prove asymptotic stability for D a +f(u + )=0 based only on the evolution of u'(r) and u-φ(r)f(u) . Keywords : Semilinear elliptic equations, Radial solutions, uniqueness, compactness, asymptotic stability Global Journal of Mathematical Sciences Vol. 7 (1) 2008: pp. 53-56","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114433292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application Of Fourier Series Analysis To Temperature Data 傅里叶级数分析在温度数据中的应用
Global Journal of Mathematical Sciences Pub Date : 2008-12-15 DOI: 10.4314/GJMAS.V7I1.21422
Ej Ekpenyong, C. Omekara
{"title":"Application Of Fourier Series Analysis To Temperature Data","authors":"Ej Ekpenyong, C. Omekara","doi":"10.4314/GJMAS.V7I1.21422","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I1.21422","url":null,"abstract":"This Paper seeks to model a periodic time series using Fourier Series Analysis Method and to use such model to forcast future values of such data. The mean monthly temperature of Uyo Metropolis consisting of 180 data points (1991 – 2006) are collected for the study. The parameter estimates of the Fourier series model are obtained by ordinary least squares method in multiple regression. The test of significance of the general model and parameters indicate that the model is statistically significant and the significant parameters provide a Fourier series model of the form: 26.82-1.163cosωt - 0.169 sinωt + 0.133cos2ωt +0.164sin2ωt - 0.116sin4ωt + 0.255et-1. The P – P plot is also used to test for the overall goodness-of-fit and it is found out that the model fits well to the data and can be used to forcast the future values of the data. Keywords : Fourier Series Analysis, Periodic Time Series, Forcasting. Global Journal of Mathematical Sciences Vol. 7 (1) 2008: pp. 5-14","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121276233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
On The Solution Of N-Person Cooperative Games 论n人合作博弈的解
Global Journal of Mathematical Sciences Pub Date : 2008-12-15 DOI: 10.4314/GJMAS.V7I1.21427
P. Chigbu, S. Udeh
{"title":"On The Solution Of N-Person Cooperative Games","authors":"P. Chigbu, S. Udeh","doi":"10.4314/GJMAS.V7I1.21427","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I1.21427","url":null,"abstract":"In this paper, two existing optimal allocation to N-person cooperative games are reviewed for comparison-The Shapley Value introduced by Shapley (1953) and the Nucleolus introduced by Schmeidler (1969). Given the nonempty Core of an N-person cooperative game, both optimal allocation procedures consider that one point of the Core is more efficient than the other points of the Core while the approaches to choosing the efficient allocation differ. Whereas Shapley employed the marginal contribution of the players into the game to achieve his aim, Schmeidler employed the extent of dissatisfaction to achieve his own aim. To choose the “best” of the optimal allocations, the Standard error and Coefficient of Variation of solutions were used to discriminate between the two procedures. When the two approaches were applied to the same sets of data, the Shapley value method produced smaller standard errors and coefficients of variation than the Nucleolus method. The Shapley value approach was therefore chosen as the better one for allocation (the value of the game) to an N-person cooperative game. Keywords : Characteristic Function; Coalition; Constant Sum Game; Imputation; Player ; Payoff; Strategy; The Core Global Journal of Mathematical Sciences Vol. 7 (1) 2008: pp. 49-52","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115019908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation Of Impulse Response Function Using The Left And Right Parameters 用左右参数估计脉冲响应函数
Global Journal of Mathematical Sciences Pub Date : 2008-12-15 DOI: 10.4314/GJMAS.V7I1.21424
E. I. Enang, I. Etukudoh
{"title":"Estimation Of Impulse Response Function Using The Left And Right Parameters","authors":"E. I. Enang, I. Etukudoh","doi":"10.4314/GJMAS.V7I1.21424","DOIUrl":"https://doi.org/10.4314/GJMAS.V7I1.21424","url":null,"abstract":"Another method of identification of impulse response function in a transfer function is proposed. This method parameterised the transfer function model into a dynamic system model involving right and left model parameters. The right and left parameters of the models are estimated by applying the iterative multiple regression approach on the input and output processes respectively. Results obtained are comparable to those obtained from direct application of the iterative multiple regression on the input process. Global Journal of Mathematical Sciences Vol. 7 (1) 2008: pp. 21-28","PeriodicalId":126381,"journal":{"name":"Global Journal of Mathematical Sciences","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132098121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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