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Journal of the Nigerian Association of Mathematical Physics最新文献

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Control of linear systems using pure time-delay 线性系统的纯时滞控制
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2009-09-01 DOI: 10.4314/JONAMP.V12I1.45488
B. Asuquo, E. Usah
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引用次数: 0
A constrained optimal stochastic production planning model 约束最优随机生产计划模型
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2009-09-01 DOI: 10.4314/JONAMP.V12I1.45544
A. Okoroafor, Gu Achi
{"title":"A constrained optimal stochastic production planning model","authors":"A. Okoroafor, Gu Achi","doi":"10.4314/JONAMP.V12I1.45544","DOIUrl":"https://doi.org/10.4314/JONAMP.V12I1.45544","url":null,"abstract":"This paper considers the state of the system which is represented by a controlled stochastic process. We shall formulate a stochastic optimal control in which the stochastic differential equations of a type known as Ito equations are considered which are perturbed by Markov diffusion process. Our goal is to use the stochastic optimal control principle to completely solve production planning model for the demand rate.","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122857574","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
Further implications of the quick evaluation of determinants 行列式快速求值的进一步含义
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2009-09-01 DOI: 10.4314/JONAMP.V12I1.45535
V. Aihie
{"title":"Further implications of the quick evaluation of determinants","authors":"V. Aihie","doi":"10.4314/JONAMP.V12I1.45535","DOIUrl":"https://doi.org/10.4314/JONAMP.V12I1.45535","url":null,"abstract":"","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121720450","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
General convergence analysis of a modified steepest descent method 一种改进的最陡下降法的一般收敛性分析
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2009-09-01 DOI: 10.4314/JONAMP.V12I1.45527
Dea Omorobge, A. Osagiede
{"title":"General convergence analysis of a modified steepest descent method","authors":"Dea Omorobge, A. Osagiede","doi":"10.4314/JONAMP.V12I1.45527","DOIUrl":"https://doi.org/10.4314/JONAMP.V12I1.45527","url":null,"abstract":"","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129953078","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
A class of stiffly stable hybrid second derivative continuous linear multistep methods for stiff IVPs in ODEs 一类求解ODEs中刚性ivp的刚稳混合二阶导数连续线性多步方法
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2009-09-01 DOI: 10.4314/JONAMP.V12I1.45520
R. Okuonghae, M. Ikhile
{"title":"A class of stiffly stable hybrid second derivative continuous linear multistep methods for stiff IVPs in ODEs","authors":"R. Okuonghae, M. Ikhile","doi":"10.4314/JONAMP.V12I1.45520","DOIUrl":"https://doi.org/10.4314/JONAMP.V12I1.45520","url":null,"abstract":"","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133116314","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
A geoelectrical investigation for ground water at Ivorri-Irri in Isoko Local Government area of Delta state 在三角洲州Isoko地方政府地区的Ivorri-Irri对地下水进行地电调查
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2009-09-01 DOI: 10.4314/JONAMP.V12I1.45509
Ee Aigbekaen, F. Ighrakpata
{"title":"A geoelectrical investigation for ground water at Ivorri-Irri in Isoko Local Government area of Delta state","authors":"Ee Aigbekaen, F. Ighrakpata","doi":"10.4314/JONAMP.V12I1.45509","DOIUrl":"https://doi.org/10.4314/JONAMP.V12I1.45509","url":null,"abstract":"","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131884875","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
Perturvation technique on the dynamic stability of a lightly damped cylindrical shell axially stressed by an impulse 微扰技术对受脉冲轴向应力的轻阻尼圆柱壳动力稳定性的影响
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2009-09-01 DOI: 10.4314/JONAMP.V12I1.45493
A. Ette
{"title":"Perturvation technique on the dynamic stability of a lightly damped cylindrical shell axially stressed by an impulse","authors":"A. Ette","doi":"10.4314/JONAMP.V12I1.45493","DOIUrl":"https://doi.org/10.4314/JONAMP.V12I1.45493","url":null,"abstract":"","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127773319","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: 2
Convergence analysis of a modified conjugate gradient method 一种改进共轭梯度法的收敛性分析
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2009-09-01 DOI: 10.4314/JONAMP.V12I1.45529
Dea Omorobge, A. Osagiede
{"title":"Convergence analysis of a modified conjugate gradient method","authors":"Dea Omorobge, A. Osagiede","doi":"10.4314/JONAMP.V12I1.45529","DOIUrl":"https://doi.org/10.4314/JONAMP.V12I1.45529","url":null,"abstract":"","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126751329","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
Anti-synchronization of the rigid body exhibiting chaotic dynamics 具有混沌动力学的刚体的反同步
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2008-06-13 DOI: 10.4314/JONAMP.V11I1.40187
E. Vincent, R. Odunaike, J. Laoye, Oa Abiola
{"title":"Anti-synchronization of the rigid body exhibiting chaotic dynamics","authors":"E. Vincent, R. Odunaike, J. Laoye, Oa Abiola","doi":"10.4314/JONAMP.V11I1.40187","DOIUrl":"https://doi.org/10.4314/JONAMP.V11I1.40187","url":null,"abstract":"Based on a method derived from nonlinear control theory, we present a novel technical approach for synchronizing the dynamics of a rigid body exhibiting chaotic motion. In this framework, the active control technique is modified and employed to design control functions based on Lyapunov stability theory and Routh-Hurwitz criteria, so that a drive-response system of a rigid body achieves anti-synchronism in the chaotic state. Global asymptotic stability and convergence of the sum of the dynamical variables representing the Eulerian state space of the two rigid bodies was verified by numerical simulations. JONAMP Vol. 11 2007: pp. 5-14","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124244400","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
Mathematical model of epidemics with intermediate classes 具有中间类的流行病数学模型
Journal of the Nigerian Association of Mathematical Physics Pub Date : 2008-06-13 DOI: 10.4314/JONAMP.V11I1.40208
S. Inyama
{"title":"Mathematical model of epidemics with intermediate classes","authors":"S. Inyama","doi":"10.4314/JONAMP.V11I1.40208","DOIUrl":"https://doi.org/10.4314/JONAMP.V11I1.40208","url":null,"abstract":"In this paper we present a Mathematical model for diseases that place some new recruits from the susceptible class into an “exposed but not yet infectious” class which we denote by E. The rest of the susceptible class can be infected directly. The model is developed and its steady state determined. The stability of the steady state was analyzed and it was found that the steady state is a saddle point. The disease free steady state was also analyzed and it was shown that it is stable if N JONAMP Vol. 11 2007: pp. 149-152","PeriodicalId":402697,"journal":{"name":"Journal of the Nigerian Association of Mathematical Physics","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125284471","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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