International Journal of Mathematical Sciences and Computing最新文献_第8页

Determination Method of Some Operational Characteristics of Information Search System in Directive Document Database 指令文献库信息检索系统若干工作特性的确定方法

International Journal of Mathematical Sciences and Computing Pub Date : 2020-06-08 DOI: 10.5815/ijmsc.2020.03.01

Fahrad H. Pashayev, Sevinj E. Pashayeva, Jahangir M. Jafarov, Pashayev I. Farhad

{"title":"Determination Method of Some Operational Characteristics of Information Search System in Directive Document Database","authors":"Fahrad H. Pashayev, Sevinj E. Pashayeva, Jahangir M. Jafarov, Pashayev I. Farhad","doi":"10.5815/ijmsc.2020.03.01","DOIUrl":"https://doi.org/10.5815/ijmsc.2020.03.01","url":null,"abstract":"The article provides a method for determining some of the operational characteristics of the information search engine in the Directive document database. During this time the life cycle of the system was studied, the schedule of time dependence of the system interruptions intensity was studied. The article states that although there are many interruptions and malfunctions at the start of operation, they are rapidly decreasing over time, and the interruption during the system's normal operation period is random. During the last wear and breakdown of system operation, the intensity of interruptions begins to increase. It also lists one of the possible structures of information search engine relationships. In practice, the basic structure of medium-sized information search engine relations in directive document databases can be represented in the article. Although the Database is located on a local network, the system may have different sources of information and can be located both on the local network and on the global Internet. Monitoring of information search engine operations is organized on the system server. According to the monitoring results, some operational characteristics of the system are calculated and refined over time. During the monitoring process, various operating characteristics are calculated, starting with the commissioning of the system. This includes the total number of queries, the number of successful and failed surveys, the time intervals between different types of surveys and survey results. such as settings. These parameters calculate the experimental operation characteristics of the information search engine in the directive document database. The calculated characteristics become clearer with time and approach their theoretical estimates. Therefore, it will take some time before the practical results are obtained. However, the results obtained in the article can be used successfully from the start of system operation.","PeriodicalId":312036,"journal":{"name":"International Journal of Mathematical Sciences and Computing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121302375","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 SEIRS Model of Tuberculosis Infection Model with Vital Dynamics, Early Treatment for Latent Patients and Treatment of Infective 基于生命动力学的结核感染SEIRS模型，潜伏患者的早期治疗和感染性治疗

International Journal of Mathematical Sciences and Computing Pub Date : 2020-06-08 DOI: 10.5815/ijmsc.2020.03.05

F. Sulayman, A. Mishra

引用次数: 2

Modelling the Impacts of Climate Change on Water Level Fluctuations in Water Resources in Tanzania: A Case Study of Mtera Dam 气候变化对坦桑尼亚水资源水位波动影响的模拟:以Mtera大坝为例

International Journal of Mathematical Sciences and Computing Pub Date : 2020-06-08 DOI: 10.5815/ijmsc.2020.03.03

Filimon Abel Mgandu, Mashaka Mkandawile, M. Rashid

引用次数: 3

A Comparative Study Between Epoxy S-Glass UD And Epoxy Carbon UD For Their Use As Manufacturing Materials For Wind Turbine Blades 环氧s -玻璃UD与环氧碳UD在风力发电机叶片制造材料中的比较研究

International Journal of Mathematical Sciences and Computing Pub Date : 2020-06-08 DOI: 10.5815/ijmsc.2020.03.04

Nazha Hasan, Zain Aldeen Nazha

{"title":"A Comparative Study Between Epoxy S-Glass UD And Epoxy Carbon UD For Their Use As Manufacturing Materials For Wind Turbine Blades","authors":"Nazha Hasan, Zain Aldeen Nazha","doi":"10.5815/ijmsc.2020.03.04","DOIUrl":"https://doi.org/10.5815/ijmsc.2020.03.04","url":null,"abstract":"The majority of failure cases may occur because of the wrong selection of inappropriate material in the manufacture of wind turbine blades. Composites are used to increase reliability and reduce wind turbine manufacturing costs. Therefore, this research focuses on comparing the use of Epoxy S-Glass UD and Epoxy Carbon UD as manufacturing materials for wind turbine blades using 3D finite element analysis; to find out which of these materials have the best performance for its use as a manufacturing material for wind turbine blades. The distribution of Von Mises stresses in wind turbine blade models was investigated using Epoxy SGlass UD and Epoxy Carbon UD under the wind loads that affect the blade of the turbine. The results showed that the value of the maximum stresses in the epoxy glass model was 3.495 × 107 Pa, while this value was in the epoxy carbon model 4.0494 × 107 Pa. As for the value of the minimum stresses, it was in the epoxy glass model 7431.8 Pa, while the value in another material model 17323 Pa. Therefore, it is not recommended to use Epoxy Carbon UD as a manufacturing material for wind turbine blades, but it is recommended to use Epoxy SGlass UD, which reduces induced stresses and thus to prolong its lifespan.","PeriodicalId":312036,"journal":{"name":"International Journal of Mathematical Sciences and Computing","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132812194","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

Numerical Solution of Partial Differential Equations with Fractional Variable Coefficients Using New Iterative Method (NIM) 分数阶变系数偏微分方程的新迭代法数值解

International Journal of Mathematical Sciences and Computing Pub Date : 2020-06-08 DOI: 10.5815/ijmsc.2020.03.02

K. Falade, T. A.T

引用次数: 8

Optimal Control Dynamics: Multi-therapies with Dual Immune Response for Treatment of Dual Delayed HIV-HBV Infections 最优控制动力学:双重免疫应答治疗双重延迟HIV-HBV感染的多重疗法

International Journal of Mathematical Sciences and Computing Pub Date : 2020-04-08 DOI: 10.5815/ijmsc.2020.02.02

B. Bassey

{"title":"Optimal Control Dynamics: Multi-therapies with Dual Immune Response for Treatment of Dual Delayed HIV-HBV Infections","authors":"B. Bassey","doi":"10.5815/ijmsc.2020.02.02","DOIUrl":"https://doi.org/10.5815/ijmsc.2020.02.02","url":null,"abstract":"It has been of concern for the most appropriate control mechanism associated with the growing complexity of dual HIV-HBV infectivity. Moreso, the scientific ineptitude towards an articulated mathematical model for coinfection dynamics and accompanying methodological application of desired chemotherapies inform this present investigation. Therefore, the uniqueness of this present study is not only ascribed by the quantitative maximization of susceptible state components but opined to an insight into the epidemiological identifiability of dual HIV-HBV infection transmission routes and the methodological application of triple-dual control functions. Using ODEs, the model was formulated as a penultimate 7-Dimensional mathematical dynamic HIV-HBV model, which was then transformed to an optimal control problem, following the introduction of multi-therapies in the presence of dual adaptive immune system and time delay lags. Applying classical Pontryagin’s maximum principle, the system was analyzed, leading to the derivation of the model optimality system and uniqueness of the system. Specifically, following the dual role of the adaptive immune system, which culminated into triple-dual application of multi-therapies, the investigation was characterized by dual delayed HIV-HBV virions decays from infected double-lymphocytes in a biphasic manner, accompanied by more complex decay profiles of infectious dual HIV-HBV virions. The result further led to significant triphasic maximization of susceptible double-lymphocytes and dual adaptive immune system (cytotoxic T-lymphocytes and humeral immune response) achieved under minimal systemic cost. Therefore, the model is comparatively a monumental and intellectual accomplishment, worthy of emulation for related and future dual infectivity.","PeriodicalId":312036,"journal":{"name":"International Journal of Mathematical Sciences and Computing","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129881179","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

Simulation of CPU Scheduling Algorithms using Poisson Distribution 基于泊松分布的CPU调度算法仿真

International Journal of Mathematical Sciences and Computing Pub Date : 2020-04-08 DOI: 10.5815/ijmsc.2020.02.04

A. Mishra, Abdullahi Ofujeh Ahmed

引用次数: 0

A Proposed Linear Programming Based Algorithm to Solve Arc Routing Problems 一种基于线性规划的圆弧布线算法

International Journal of Mathematical Sciences and Computing Pub Date : 2020-04-08 DOI: 10.5815/ijmsc.2020.02.03

Hashnayne Ahmed

引用次数: 3

Slow Invariant Manifold of Brusselator Model Brusselator模型的慢不变流形

International Journal of Mathematical Sciences and Computing Pub Date : 2020-04-08 DOI: 10.5815/ijmsc.2020.02.05

A. Nazimuddin, Md. Showkat Al

{"title":"Slow Invariant Manifold of Brusselator Model","authors":"A. Nazimuddin, Md. Showkat Al","doi":"10.5815/ijmsc.2020.02.05","DOIUrl":"https://doi.org/10.5815/ijmsc.2020.02.05","url":null,"abstract":"The slow invariant manifold is a unique trajectory of the dynamical system that describes the long-time dynamics of the system’s evolution efficiently. Determining such manifolds is of obvious importance. On one hand they provide a basic insight into the dynamics of the system, on the other hand they allow a reduction of dimension of the system occurs on the invariant manifold only. If the dimension of the invariant manifold is sufficiently low, this reduction may result in substantial savings in computational costs. In this paper, differential geometry based new developed approach called the flow curvature method is considered to analyse the Brusselator model. According to this method, the trajectory curve or flow of any dynamical system of dimension considers as a curve in Euclidean space of dimension . Then the flow curvature or the curvature of the trajectory curve may be computed analytically. The set of points where the flow curvature is null or empty defines the flow curvature manifold. This manifold connected with the dynamical system of any dimension directly describes the analytical equation of the slow invariant manifold incorporated with the same dynamical system. In this article, we apply the flow curvature method for the first time on the two-dimensional Brusselator model to compute the analytical equation of the slow invariant manifold where we use the Darboux theorem to prove the invariance property of the slow manifold.","PeriodicalId":312036,"journal":{"name":"International Journal of Mathematical Sciences and Computing","volume":"24 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133170555","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

Desirable Dog-Rabies Control Methods in an Urban setting in Africa -a Mathematical Model 理想的狗狂犬病控制方法在城市设置在非洲-数学模型

International Journal of Mathematical Sciences and Computing Pub Date : 2020-02-08 DOI: 10.5815/ijmsc.2020.01.05

E. Renald, Dmitry Kuznetsov, K. Kreppel

{"title":"Desirable Dog-Rabies Control Methods in an Urban setting in Africa -a Mathematical Model","authors":"E. Renald, Dmitry Kuznetsov, K. Kreppel","doi":"10.5815/ijmsc.2020.01.05","DOIUrl":"https://doi.org/10.5815/ijmsc.2020.01.05","url":null,"abstract":"Rabies is a fatal, zoonotic, viral disease that causes an acute inflammation of the brain in humans and other mammals. It is transmitted through contact with bodily fluids of infected mammals, usually via bites or scratches. In this paper, we formulate a deterministic model which measures the effects of different rabies control methods (mass-culling and vaccination of dogs) for urban areas near wildlife, using the Arusha region in Tanzania as an example. Values for various parameters were deduced from five years’ worth of survey data on Arusha’s dog population. Data included vaccination coverage, dog bites and rabies deaths recorded by a local non-governmental organization and the Ministry of Agriculture, Livestock Development and Fisheries of the United Republic of Tanzania. The basic reproduction number R0 and effective reproduction number Re were computed and found to be 1.9 and 1.2 respectively. These imply that the disease is endemic in Arusha. The numerical simulation of the reproduction number shows that vaccination is the most appropriate control method for rabies transmission in urban areas near wildlife reservoirs. The disease free equilibrium ε0 is also computed. If the effective reproduction number Re is computed and found to be less than 1, it implies that it is globally asymptotically stable in the feasible region Φ. If Re > 1 it is implied that there is one equilibrium point which is endemic and it is locally asymptotically stable.","PeriodicalId":312036,"journal":{"name":"International Journal of Mathematical Sciences and Computing","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127725575","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