International journal of statistics and applications最新文献_第2页

Application of ARIMA Models to Road Traffic Accident Cases in Ghana ARIMA模型在加纳道路交通事故案例中的应用

International journal of statistics and applications Pub Date : 2014-01-01 DOI: 10.5923/J.STATISTICS.20140405.03

R. Avuglah, K. A. Adu-Poku, E. Harris

引用次数: 20

Topological Optimization and Genetic Algorithms Used in a Wheel Project for a Drone 拓扑优化与遗传算法在无人机轮毂设计中的应用

International journal of statistics and applications Pub Date : 2013-10-01 DOI: 10.5923/J.STATISTICS.20130305.02

D. C. D. Souza, S. L. M. R. Filho, A. L. C. D. Carvalho, N. Silva, S. Barcelos, A. Christoforo

{"title":"Topological Optimization and Genetic Algorithms Used in a Wheel Project for a Drone","authors":"D. C. D. Souza, S. L. M. R. Filho, A. L. C. D. Carvalho, N. Silva, S. Barcelos, A. Christoforo","doi":"10.5923/J.STATISTICS.20130305.02","DOIUrl":"https://doi.org/10.5923/J.STATISTICS.20130305.02","url":null,"abstract":"The study of the structural components of an aircraft such as landing gear, wheel and triquilha are elements that undergo constant changes, depending on the project requirement and efforts. A mong these mechanisms stands the wheel, because it is the element that makes the connection between aircraft and ground. Designed to withstand small di splacements and strains without losing its characteristics, is an element in wh ich studies with software using the Fin ite Element Method are present and important to better design component. The development of an Aeronautical Design, since its inception, detailed design and construction is a major challenge to the designer by the intense comp lexity of aerodynamic factors and dimensional parameters, integrated to a large mu ltid isciplinary. The present study aimed to use topological optimization processes present in Ansys ® software coupled with genetic algorith ms and statistical methods, software ModeFrontier®, analyze and get an optimal fo rm for the wheels used in aircraft cargo to Aerodesign SA E co mpetit ions. Bound methods allo wed a reduction of 40% co mpared to previous projects and found that the structural parameter Lane Width is that present the most influence on the mechanical performance of the aircraft.","PeriodicalId":91518,"journal":{"name":"International journal of statistics and applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84028407","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

Evaluation of Dimensional and Aerodynamic Parameters for an Aircraft Radio Controlled through Genetic Algorithms and Design of Experiments 基于遗传算法的飞机无线电控制尺寸及气动参数评估与实验设计

International journal of statistics and applications Pub Date : 2013-06-01 DOI: 10.5923/J.STATISTICS.20130303.04

D. Amorim, C. D. Souza, A. Luis, Sergio Luiz Moni, Ribeiro Filho, F. Lahr, A. Christoforo

{"title":"Evaluation of Dimensional and Aerodynamic Parameters for an Aircraft Radio Controlled through Genetic Algorithms and Design of Experiments","authors":"D. Amorim, C. D. Souza, A. Luis, Sergio Luiz Moni, Ribeiro Filho, F. Lahr, A. Christoforo","doi":"10.5923/J.STATISTICS.20130303.04","DOIUrl":"https://doi.org/10.5923/J.STATISTICS.20130303.04","url":null,"abstract":"This paper presents a study of aircraft configuration TKV2012 that is more optimized as possible in all aspects of stage length, questions and restrictions established by the SAE Co mpetit ion BRAZIL Aero Design 2012. The analytical method for estimation of the aircraft aerodynamic coefficients was performed using the linear appro ximation to the theory of Multhopp. Design of Experiments (DOE) was used integrated into the genetic algorith m through the interface ModeFRONTIER®, version 4.3, the company Esteco®. We used the algorithm and Planning SOBOL MOGA II, with about 28 input variables, given the requirements: project report (containing plants and forecast payload), oral presentation, maximu m loaded weight, high structural efficiency, \"accuracy\" Predict ion Weight Loaded (Accuracy Project) and bonuses. The primary outcome variab le was the total score, since the goal was to maximize their. The results allowed to identify and optimize the d imensional parameters of the aircraft, as well as signaling the main factors that influence the total score, helping to define the configuration of the aircraft 2012.","PeriodicalId":91518,"journal":{"name":"International journal of statistics and applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79281681","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 Class of Modified Ratio Estimators Using Deciles of an Auxiliary Variable 一类利用辅助变量十分位数的修正比率估计

International journal of statistics and applications Pub Date : 2013-01-07 DOI: 10.5923/J.STATISTICS.20120206.02

J. Subramani, G. Kumarapandiyan

引用次数: 13

Multi Response Optimization of Simultaneous Fixation of Reactive Printing and Crease Resistant Finishing Using Desirability Function 利用期望函数优化反应印花与抗折皱整理同时固定的多响应优化

International journal of statistics and applications Pub Date : 2013-01-07 DOI: 10.5923/J.STATISTICS.20120206.06

Fareha Asim, M. Mahmood

引用次数: 2

Reliability Estimation and Confidence-interval for Two-unit System in the Presence of Common Cause Failures and Human Errors 存在共因故障和人为错误的双单元系统可靠性估计和置信区间

International journal of statistics and applications Pub Date : 2013-01-07 DOI: 10.5923/J.STATISTICS.20120206.04

G. Sagar

引用次数: 1

Optimum Step Stress Accelerated Life Testing For Rayleigh Distribution 瑞利分布的最佳阶跃应力加速寿命试验

International journal of statistics and applications Pub Date : 2013-01-07 DOI: 10.5923/J.STATISTICS.20120206.05

S. Saxena, S. Zarrin, M. Kamal, Arif-ul-Islam

引用次数: 9

Bayesian Sequential Estimation of Proportion of Orthopaedic Surgery Among Different Age Groups: A Case Study of National Orthopaedic Hospital, Igbobi-Nigeria 不同年龄组骨科手术比例的贝叶斯序列估计——以尼日利亚伊博比国立骨科医院为例

International journal of statistics and applications Pub Date : 2013-01-07 DOI: 10.5923/J.STATISTICS.20120206.03

R. Ogundeji, A. J. Adewara, T. Nurudeen

{"title":"Bayesian Sequential Estimation of Proportion of Orthopaedic Surgery Among Different Age Groups: A Case Study of National Orthopaedic Hospital, Igbobi-Nigeria","authors":"R. Ogundeji, A. J. Adewara, T. Nurudeen","doi":"10.5923/J.STATISTICS.20120206.03","DOIUrl":"https://doi.org/10.5923/J.STATISTICS.20120206.03","url":null,"abstract":"Bayesian methods provide more intuitive and meaningful inferences than likelihood-only based inferences. This is simply because Bayesian approach includes prior information as well as likelihood. In empirical Bayes (EB) methodology, we use data to help determine the prior through estimation of the so-called hyperparameters. In this paper, a Bayesian model called Beta-binomial conjugate model is employed using Bayesian sequential estimation method to estimate the proportion of different age groups attended to at the National Orthopaedic hospital, Igbobi, Nigeria. Over the years results show that the highest number of patients at the hospital is within the age group 15 to 44 years but with the smallest proportion of orthopaedic surgeries. Similarly, smallest the numbers of patients are among the age group less than one year and greater than 64 years but with highest proportion of orthopaedic surgeries. Also, overall EB proportion of patients admitted for orthopaedic surgeries in the hospital across the age groups increased steadily. Finally, the results of the comparative analysis of the sample and EB proportions show that the EB estimators are better estimators on the basis of efficiency and consistency.","PeriodicalId":91518,"journal":{"name":"International journal of statistics and applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76320592","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

The Methodology on Statistical Analysis of Data Transformation for Model Development 模型开发中数据转换的统计分析方法

International journal of statistics and applications Pub Date : 2013-01-07 DOI: 10.5923/J.STATISTICS.20120206.01

J. Diah, J. Ahmad, Mazidah Mukri

引用次数: 8

On Line Computation of Process Capability Indices 工艺能力指标的在线计算

International journal of statistics and applications Pub Date : 2012-12-01 DOI: 10.5923/J.STATISTICS.20120205.06

J. Subramani, S. Balamurali

引用次数: 5