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An Empirical Study of Robust Modified Recursive Fits of Moving Average Models 移动平均模型鲁棒修正递推拟合的实证研究
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.87.100
M. Ismail, Hend Auda, J. McKean, Mahmoud M. Sadek
: The time-series Moving Average (MA) model is a nonlinear model; see, for example. For traditional Least Squares (LS) fits, there are several algorithms to use for computing its fit. Since the model is nonlinear, Fuller discusses a Newton-type step algorithm. proposed a recursive algorithm based on a sequence of three linear LS regressions. In this study, we robustify Koreisha and Pukkila’s algorithm, by replacing these LS fits with robust fits. We selected an efficient, high breakdown robust fit that has good properties for skewed as well as symmetrically distributed random errors. Other robust estimates, however, can be chosen. We present the results of a simulation study comparing our robust modification with the Maximum Likelihood Estimates (MLE) in terms of efficiency and forecasting. Our robust modification has relatively high empirical efficiency relative to the MLE estimates under normally distributed errors, while it is much more efficient for heavy-tailed error distributions, including heavy-tailed skewed distributions.
:时间序列移动平均(MA)模型是一种非线性模型;比如说。对于传统的最小二乘(LS)拟合,有几种算法用于计算其拟合。由于模型是非线性的,Fuller讨论了一种牛顿型步进算法。提出了一种基于三个线性LS回归序列的递归算法。在本研究中,我们通过将这些LS拟合替换为鲁棒拟合来鲁棒化Koreisha和Pukkila的算法。我们选择了一种有效的、高击穿的鲁棒拟合,它对倾斜分布和对称分布的随机误差具有良好的性能。然而,可以选择其他可靠的估计。我们提出了一项模拟研究的结果,比较了我们的鲁棒修正与最大似然估计(MLE)在效率和预测方面的效果。我们的鲁棒修正相对于正态分布误差下的MLE估计具有相对较高的经验效率,而对于重尾误差分布,包括重尾偏态分布,它的效率要高得多。
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引用次数: 0
Modified Human Development Index using Data Envelopment Analysis Approach  基于数据包络分析方法的修正人类发展指数
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.115.133
Y. Salama, R. Hamed, M. Rashwan
: Composite Indicator is considered the mathematical aggregation which has wide usage for monitoring performances, conducting benchmarks, analyzing policies, and communicating publicly. Human Development Index (HDI) is the most popular index which measures human development through average achievement in its main dimensions: Health status, education status, and living standard but it is faced with several critiques, positive and negative. Moreover, HDI was tested to have a positive and significant correlation with natural resource abundance. Therefore, based on Mathematical Programming approaches, previously tested for Composite Indicators’ development, this research proposes a new calculated HDI using a Data Envelopment Analysis approach based on the Goal Programming model; including missing values’ estimation. This new proposed HDI was validated through Sensitivity Analysis of Normalization and Weighting methods; in addition to Wilcoxon Signed Rank Test. The first test shows a positive high correlation between the proposed HDIs and the United Nations HDI. Those tests ensure that HDI rankings are highly correlated and that they are unchanged given the different normalization and weighting techniques. Moreover, they reflect that the paired sample mean is not the same. This highlights the advantageous property of the proposed HDI; preserving both the advantages of Goal Programming and Data Envelopment Analysis approaches, in addition to others.
:复合指标被认为是一种数学聚合,广泛用于监控性能、进行基准测试、分析策略和公开沟通。人类发展指数(HDI)是最受欢迎的指数,它通过健康状况、教育状况和生活水平等主要方面的平均成就来衡量人类发展,但它面临着一些积极和消极的批评。此外,HDI与自然资源丰度呈显著正相关。因此,在数学规划方法的基础上,本研究提出了一种新的基于目标规划模型的数据包络分析方法计算HDI;包括缺失值的估计。通过归一化和加权方法的敏感性分析验证了新提出的HDI;除了Wilcoxon符号秩检验。第一个测试显示拟议的人类发展指数与联合国人类发展指数之间的高度正相关。这些测试确保HDI排名高度相关,并且在不同的标准化和加权技术下保持不变。而且,它们反映了成对样本均值不相同。这突出了拟议的人类发展指数的优势属性;保留了目标规划和数据包络分析方法的优点,以及其他方法。
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引用次数: 0
Predicting the Movement of Dentistry Students using Markov Chain 用马尔可夫链预测牙科学生的运动
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.27.35
Esmail Hassan Abdullatif Al-Sabri
Email: esmailsabri2006@gmail.com Abstract: Developing and increasing the effectiveness of any system (university system) depends on continuous evaluation and improvement using quantitative methods based on quantitative measurement and efficient mathematical models that can predict the future of the system, discover its improvement requirements and increase its effectiveness . This study is an application of the Stochastics Markov Process for students of the College of Dentistry at Ibb University. It was carried out by building a model for the movement (transition) of student’s cohorts in the college during the years of study and predicting the average times spent by the student until obtaining a degree in his/her track, as well as predicting the number of students expected to graduate for the post-study period. The study found that the average time for obtaining a bachelor's degree (graduation) is ordinary for the total students, although the average times for male students are less than the average times for female students.
摘要:任何系统(大学系统)的发展和有效性的提高都依赖于基于定量测量和高效数学模型的定量方法的持续评估和改进,这些方法可以预测系统的未来,发现其改进需求并提高其有效性。本研究是随机马尔可夫过程在伊布大学牙科学院学生中的应用。它是通过建立一个学生群体在学习期间在学院的运动(过渡)模型,预测学生在其专业获得学位所需的平均时间,以及预测学习后毕业的学生人数来实现的。研究发现,获得学士学位(毕业)的平均时间对于全体学生来说是普通的,尽管男生的平均时间比女生的平均时间要少。
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引用次数: 0
Hopf Algebraic Structure of the (p,q)-Square Heizenberg White Noise Algebra (p,q)平方Heizenberg白噪声代数的Hopf代数结构
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.65.70
A. Riahi
The two-parameter quantum deformations algebras based on the Fock representation for the two parameters deformed quantum oscillator algebra obtained in (Riahi et al., 2020a) and its connection with the Meixner classes given in a series of papers (Berezansky, 1968; Berezansky and Kondratiev, 2013; Barhoumi and Riahi, 2010) which found a lot of interesting applications in quantum probability. The Hopf algebraic structure problem stated below has led, in the past 30 years, to a multiplicity of new results in different fields of mathematics and physics. The theory of multiparameter quantum deformations of Lie algebras (Hu, 1999; Riahi et al., 2021), Lie bialgebras (Song and Su, 2006; Yue and Su, 2008), and quantization of Lie algebras (Chakrabarti and Jagannathan, 1991; Song et al., 2008; Su and Yuan, 2010) play an essential role in the quantum white noise literature. More precisely, the Fock representation of two parameters deformed commutation relation was first studied by (Riahi et al., 2021) by constructing an interacting Fock space Fp,q() as the space of representation.
基于(Riahi et al., 2020a)中得到的双参数变形量子振子代数的Fock表示的双参数量子变形代数及其与一系列论文中给出的Meixner类的联系(Berezansky, 1968;别列赞斯基和康德拉季耶夫,2013;Barhoumi和Riahi, 2010),他们在量子概率中发现了许多有趣的应用。在过去的30年里,下面所述的Hopf代数结构问题在数学和物理的不同领域产生了大量的新结果。李代数的多参数量子变形理论(Hu, 1999;Riahi et al., 2021),李双代数(Song and Su, 2006;Yue和Su, 2008),李代数的量化(Chakrabarti和Jagannathan, 1991;Song et al., 2008;Su and Yuan, 2010)在量子白噪声文献中发挥了至关重要的作用。更准确地说,(Riahi et al., 2021)首先通过构造一个相互作用的Fock空间Fp,q()作为表示空间,研究了两参数变形换相关系的Fock表示。
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引用次数: 0
Chlodowsky Type (λ, q)-Bernstein Stancu Operator of Korovkin-Type Approximation Theorem of Rough I-Core of Triple Sequences 三序列粗糙i核的korovkin型逼近定理的Chlodowsky型(λ, q)-Bernstein Stancu算子
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.71.77
A. Esi, S. Nagarajan, Kemal Ozdemir
: In this study, we obtain a Korovkin-type approximation theorem for Chlodowsky type ( λ, q )-Bernstein Stancu operator of rough I -convergent of triple sequences of positive linear operators of two variables from H w ( K ) to C w ( K ). We introduce and study some basic properties of Korovkin-type approximation theorem for Chlodowsky type ( λ, q )-Bernstein Stancu operator of rough I -convergent of triple sequence spaces and also study the set of all Korovkin-type approximation theorem for Chlodowsky type ( λ, q )− Bernstein Stancu operator of rough I -limits of triple sequence spaces and the relation between analyticness and Korovkin-type approximation theorem for Chlodowsky type ( λ, q )-Bernstein Stancu operator of rough I -core of triple sequence spaces.
本文给出了两个变量的正线性算子的三列从H w (K)到C w (K)的粗糙I -收敛的Chlodowsky型(λ, q)-Bernstein Stancu算子的一个korovkin型逼近定理。引入并研究了三列空间的粗略I -收敛型Chlodowsky型(λ, q)-Bernstein Stancu算子的korovkin -近似定理的一些基本性质,研究了三列空间的粗略I -极限型Chlodowsky型(λ, q)-Bernstein Stancu算子的所有korovkin -近似定理的集合,以及Chlodowsky型(λ, q)的解析性与korovkin -近似定理的关系。三序列空间粗糙I核的-Bernstein Stancu算子。
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引用次数: 0
Proof of Frankl's Conjecture: A Non-Constructive Approach 弗兰克尔猜想的证明:一种非建设性方法
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.134.137
Yonghong Liu
: Let U be a finite set and X a family of nonempty subsets of U , which is closed under unions. We establish a connection between Frankl's conjecture and equipollence sets, in which a complementary set is an Equipollence set on the Frobenius group. We complete the proof of the union-closed sets using a non-constructive approach. The proof relies upon that we need to prove, that the series of the prime divisor diverges, and there exists x i which appears at least half distributed in subsets.
:设U是一个有限集,X是U的非空子集族,U的子集在并并下闭。建立了Frankl猜想与等价集之间的联系,其中互补集是Frobenius群上的等价集。我们用非建设性的方法完成了并闭集的证明。证明依赖于我们需要证明,素数的级数是发散的,并且存在xi至少一半分布在子集中。
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引用次数: 0
Mathematical Analysis of M/M/C Vacation Queueing Model with a Waiting Server and Impatient Customers 具有等待服务和不耐烦顾客的M/M/C假期排队模型的数学分析
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.36.48
Ganesh Sapkota, R. Ghimire
Corresponding Author: Ganesh Sapkota Department of Mathematics, Kathmandu University, Nepal Email: sapkotaganesh15005@gmail.com Abstract: In this study, the transient analysis of the M/M/C queueing system has been made under the provision of servers' single vacation and loss of impatient customers. Customers arrive in the system in the Poisson process and are served by multiple servers in an exponential distribution process. Customers are served in the chronological order of their arrival. The main purpose of this investigation is to derive (i) the probability distribution functions, (ii) the formulas for the expected number of the customers in the system as well as in queue in the explicit form, (iii) the expected sojourn time and the expected time spent in waiting in the queue. Moreover, the sensitiveness of performance measures due to the small change of vacation rate γ, impatient rate ξ, and server’s waiting rate η has also been shown graphically. To show the applicability of the model under study, ample numerical results have been illustrated. The error computations have also been cited during the vacation period and busy period. Queueing model understudy may have its applications in multichannel telecommunications, security systems in the airport, train stations, and the manufacturing system.
摘要:本文研究了在服务器单一休假和客户流失的情况下,M/M/C排队系统的暂态分析。客户以泊松过程到达系统,并以指数分布过程由多个服务器提供服务。我们按照顾客到达的时间顺序为他们服务。本研究的主要目的是推导出(i)概率分布函数,(ii)系统和队列中显式形式的预期客户数量的公式,(iii)预期逗留时间和预期排队等待时间。此外,由于休假率γ、不耐烦率ξ和服务器等待率η的微小变化,性能指标的敏感性也得到了图形化的显示。为了说明所研究模型的适用性,给出了大量的数值结果。文中还列举了休假期和繁忙期的误差计算。排队模型替代算法在多通道通信、机场、火车站安全系统和制造系统中具有广泛的应用前景。
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引用次数: 1
The Efficiency of Seven-Variable Box-Behnken Experimental Design with Varying Center Runs on Full and Reduced Model Types 变中心七变量Box-Behnken实验设计在全模型和简化模型上的效率
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.196.207
M. Iwundu, Joan Cosmos
: Response Surface Methodology is widely used in the optimization of industrial processes and products that depend on several experimental variables. One of the most tested and efficient second-order Response Surface Methodology designs is the Box-Behnken Design. This research explores the efficiency of a seven-variable Box-Behnken design with varying center runs, on full and reduced quadratic models. Backward Elimination and Forward Selection techniques are employed as the variable selection techniques for obtaining the reduced models, based on the Akaike Information Criterion. Fit Statistics and Design Efficiency values are obtained for the reduced models and are compared with those of the full model. Generally, results show that the reduced quadratic models perform best under one center-point run, thereby making the reduced models the most preferred in terms of the model fit and D-efficiency. Comparative analysis, based on G-efficiency, reveals that the full quadratic model performs better than the reduced models under one center-point Box-Behnken design.
响应面法被广泛应用于依赖于几个实验变量的工业过程和产品的优化。最有效的二阶响应面方法设计之一是Box-Behnken设计。本研究探讨了一个七变量Box-Behnken设计的效率与不同的中心运行,在充分和减少二次模型。在赤池信息准则的基础上,采用反向消去和正向选择技术作为变量选择技术获得约简模型。得到了简化模型的拟合统计值和设计效率值,并与完整模型的拟合统计值进行了比较。结果表明,简化后的二次模型在一个中心点运行下表现最好,因此在模型拟合和d -效率方面,简化后的模型是最优选的。基于g效率的对比分析表明,在单中心点Box-Behnken设计下,全二次模型的性能优于简化模型。
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引用次数: 0
Sufficient Descent Condition of the Polak-Ribière-Polyak (PRP) Conjugate Gradient Method without Line Search 无线搜索的polak - ribi<e:1> - polyak (PRP)共轭梯度法下降的充分条件
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.11.15
A. A., KH. I. Osman, Osman O. O. Yousif, Mogtaba Mohammed, Arafa Dawood, B. A. Younis
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引用次数: 0
Measure of Departure from Conditional Partial Symmetry for Square Contingency Tables 方形列联表偏离条件部分对称的测度
IF 0.3 Pub Date : 2022-01-01 DOI: 10.3844/jmssp.2022.138.142
Yusuke Saigusa, Nobuki Fukumoto, Tomoyuki Nakagawa, S. Tomizawa
: For square contingency tables, a symmetry of conditional probability in part of the off-diagonal cells is considered with respect to the main diagonal. A measure is proposed to represent the degree of departure from the symmetric structure and gives the approximate confidence interval. Some numerical experiments are performed to illustrate the validity and usefulness of the proposed measure. Japanese occupational data are analyzed using the measure.
对于方形列联表,考虑了部分非对角线单元相对于主对角线的条件概率对称性。提出了一种表示偏离对称结构程度的度量,并给出了近似置信区间。通过数值实验验证了该方法的有效性和实用性。利用该方法对日本的职业数据进行了分析。
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引用次数: 0
期刊
Jordan Journal of Mathematics and Statistics
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