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Comparison of Harder stability and Rus stability and their equivalence 硬稳定性与罗斯稳定性的比较及其等价性
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.17495.1939
G. Babu, G. Satyanarayana
In this paper, we study the stability of Mann iteration procedure in two directions, namely one due to Harder and the second one due to Rus with respect to a map $T:Kto K$ where $K$ is a nonempty closed convex subset of a normed linear space $X$ and there exist $deltain(0,1)$ and $Lgeq 0$ such that $||Tx-Ty||leqdelta||x-y||+L||x-Tx||$ for $x,yin K$. Also, we show that the Mann iteration procedure is stable in the sense of Rus may not imply that it is stable in the sense of Harder for weak contraction maps. Further, we compare and study the equivalence of these two stabilities and provide examples to illustrate our results.
本文研究了关于映射$T:K到K$的两个方向上的Mann迭代过程的稳定性,其中$K$是赋范线性空间$X$的一个非空闭凸子集,并且存在$deltain(0,1)$和$Lgeq 0$,使得$||Tx-Ty||leqdelta|| X -y||+L|| X - tx ||$对于$X,yin K$。此外,我们还证明Mann迭代过程在Rus意义上是稳定的,但这并不意味着对于弱收缩映射它在Harder意义上是稳定的。进一步,我们比较和研究了这两种稳定性的等价性,并举例说明了我们的结果。
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引用次数: 0
Evaluation of longitudinal wave velocity and elasticity modulus of concrete at different ages considering mixing ratios 考虑配合比的不同龄期混凝土纵波速度和弹性模量评价
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.18485.2015
Mehdi Sabagh, Mansour Asgari Khorasgani, M. Kazemi
Concrete is a material that the mechanical properties of which change over time. This change is due to chemical reactions within the concrete known as hydration. One of these properties is the modulus of elasticity and longitudinal wave velocity, which has a direct relation with the concrete age and its setting. Just after the materials mixing, the concrete setting is fast, and over time its rate decreases. Here, a series of cubic concrete specimens are prepared and changing in longitudinal wave velocity and modulus of elasticity in different ages is monitored during the process of curing and a relationship has been presented. Materials specifications impact and concrete mixing ratios, including the water to cement ratio and fine to coarse aggregates ratio is studied. Ultrasonic wave velocity has been increased faster at early ages of specimens where the concrete setting process is fast and in last days, rates of increasing the longitudinal wave velocity decreases. An increase in the water to cement ratio leads to increases in the longitudinal wave velocity over time. The empirical equations have been formulated as logarithmic curves. These empirical equations have been developed and a model with more efficiency and precision has been presented. These empirical equations can be used in the analytical and numerical analysis of structures. These models can be used to determine the loading time of concrete structures and to predicting their other physical and mechanical properties, such as strength and stiffness.
混凝土是一种机械性能随时间变化的材料。这种变化是由于混凝土内部被称为水化的化学反应。其中的弹性模量和纵波速度与混凝土的龄期及其设置有直接关系。在材料混合后,混凝土凝结速度很快,随着时间的推移,其速度下降。在此基础上,制备了一系列立方体混凝土试件,监测了其在养护过程中纵波速度和弹性模量在不同龄期的变化,并给出了两者之间的关系。研究了材料规格、影响因素和混凝土配合比,包括水灰比和细粗骨料比。超声波速在混凝土凝结速度快的早期试件中增加较快,在后期试件纵波波速增加速率减小。水灰比的增加导致纵波速度随时间的增加。经验方程已被表示为对数曲线。对这些经验方程进行了推导,并提出了一个效率更高、精度更高的模型。这些经验方程可用于结构的解析和数值分析。这些模型可用于确定混凝土结构的加载时间,并预测其其他物理和机械性能,如强度和刚度。
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引用次数: 0
On the maximum number of limit cycles of a planar differential system 平面微分系统的最大极限环数
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.23049.2468
Sana Karfes, E. Hadidi, M. Kerker
In this work, we are interested in the study of the limit cycles of a perturbed differential system in  (mathbb{R}^2), given as follows[left{begin{array}{l}dot{x}=y, dot{y}=-x-varepsilon (1+sin ^{m}(theta ))psi (x,y),%end{array}%right.]where (varepsilon) is small enough, (m) is a non-negative integer, (tan (theta )=y/x), and (psi (x,y)) is a real polynomial of degree (ngeq1). We use the averaging theory of first-order to provide an upper bound for the maximum number of limit cycles. In the end, we present some numerical examples to illustrate the theoretical results.
在这项工作中,我们对(mathbb{R}^2)中摄动微分系统的极限环的研究感兴趣,给出如下[left{begin{array}{l}dot{x}=y, dot{y}=-x-varepsilon (1+sin ^{m}(θ))psi (x,y),%end{array}%right。],其中(varepsilon)足够小,(m)是非负整数,(tan (θ)=y/x), (psi (x,y))是次(ngeq1)的实多项式。利用一阶平均理论给出了极限环的最大数目的上界。最后,给出了一些数值算例来说明理论结果。
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引用次数: 0
Application of a generalization of Darbo's fixed point theorem via Mizogochi-Takahashi mappings on mixed fractional integral equations involving $(k, s)$-Riemann-Liouville and Erd'{e}lyi-Kober fractional integrals 利用Mizogochi-Takahashi映射推广Darbo不动点定理在包含$(k, s)$-Riemann-Liouville和Erd'{e}lyi-Kober分数积分的混合分数积分方程上的应用
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.23002.2451
Anupam Das, Vahid Parvaneh, Bhuban Chandra Deuri, Z. Bagheri
We have established the solvability of fractional integral equations with both $(k,s)$-Riemann-Liouville and Erd'{e}lyi-Kober fractional integrals using a new generalized version of the Darbo's theorem using Mizogochi-Takahashi mappings and justify the validity of our results with the help of suitable examples.
我们利用Mizogochi-Takahashi映射,利用Darbo定理的一个新推广版本,建立了$(k,s)$-Riemann-Liouville和Erd'{e}lyi-Kober分数阶积分方程的可解性,并通过适当的例子证明了结果的有效性。
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引用次数: 3
Investigation and Classification of Chronic Wound Tissue images Using Random Forest Algorithm (RF) 基于随机森林算法(RF)的慢性伤口组织图像调查与分类
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.24438.2744
T. Chitra, C. Sundar, S. Gopalakrishnan
The broad increase make use of digital cameras, by hand wound imaging has turn out to be common practice in experimental place. There is in malice of still a condition for a reasonable device for accurate wound curing consideration between dimensional facility and tissue categorization in a exacting simple to exploit technique We achieved the major unit of this plan by computing a 3-D model for wound dimensions using un calibrated revelation techniques. We highlight at this point on tissue classification from color and eminence region descriptors computed after unverified segmentation. As a result of perception distortions, unconstrained lighting provisions and viewpoints, wound assessments modify commonly in the middle of patient review. The majority significant separation of this article is to overcome this trouble by means of a multi inspection approach for tissue classification, relying on a 3-D model onto which tissue labels are mapped and categorization result merged. The investigational categorization tests communicate that improved repeatability and robustness are obtained and that metric assessment is attain through appropriate region and degree dimensions and wound chart origin. In this manuscript we proposed wound image segmentation, tissue classification in grouping with the Random Forest (RF). These methodology are helpful for classifying the rate of injured tissue in a segmented element and improved accuracy.
随着数码相机的广泛使用,在实验场所进行手部伤口成像已成为普遍做法。考虑到尺寸设施和组织分类之间的关系,在一种严格简单的开发技术中,仍然存在一个合理的设备来精确治疗伤口的条件。我们通过使用未校准的揭示技术计算伤口尺寸的三维模型来实现该计划的主要单元。在这一点上,我们强调从未经验证的分割后计算的颜色和隆起区域描述符进行组织分类。由于感知扭曲,不受约束的照明规定和观点,伤口评估通常在患者复查中修改。本文最重要的分离是通过组织分类的多重检查方法来克服这一问题,该方法依赖于组织标签映射和分类结果合并的三维模型。研究性分类测试表明,获得了改进的可重复性和稳健性,并且通过适当的区域和程度维度和伤口图来源获得了度量评估。在这篇文章中,我们提出了伤口图像分割,组织分类分组随机森林(RF)。这些方法有助于在分割单元中对损伤组织进行分类,提高准确率。
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引用次数: 4
Numerical analysis of the wall impact in the peristaltic pumping of a casson liquid in an inclined canal 斜管内液体蠕动泵送过程中壁冲击的数值分析
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.24467.2750
Ramu Katipelli, Shvn Krishna Kumari
Flow is considered in the moving frame of reference with constant velocity along the wave. The developed mathematical model is presented by a set of partial differential equations. A numerical algorithm based on finite element method is implemented to evaluate the numerical solution of the governing partial differential equations in the stream-vorticity formulation.This paper is about the study of Numerical analysis of the peristaltic conveyance of a casson fluid in a skewed tube under the consideration of low Reynolds and long wavelength .The problem is discussed on the inclination angle and yield stress of a fluid are examined for different qualitative and quantitative effects on pressure and also the trapping bolus creation analyzed by changing various parameters, the equation of flux analyzed in a wave frame moving at wave speed. Expressions are derived for the frictional force, change in volume flow rate, rise and drop in pressure. The impact of frictional force on various parameters on the pumping characteristics and pressure flow curves discussed through graphs
流动是在沿波匀速运动的参考系中考虑的。建立的数学模型由一组偏微分方程表示。提出了一种基于有限元法的数值算法,用于求解流涡量方程中控制偏微分方程的数值解。本文研究了低雷诺数和长波长条件下卡松流体在斜管中蠕动传输的数值分析问题,讨论了流体的倾角和屈服应力对压力的不同定性和定量影响,分析了不同参数对捕获球产生的影响,分析了以波速运动的波框中的通量方程。推导出摩擦力、体积流量变化、压力升降的表达式。通过图形讨论了摩擦力对各参数对泵送特性和压力流动曲线的影响
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引用次数: 0
A study of g∗ - fuzzy closed set via αm in double fuzzy topological space 重模糊拓扑空间中经αm的g * -模糊闭集的研究
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2022.5460
Sanaa Abdullah, Hiba O Mousa
The aim of this research paper is to present and study a new class of generalized closed sets in double fuzzy topological spaces, by using the fuzzy - αm closed set, that was previously presented. This new class is called the fuzzy αm - g∗fuzzy closed set. The relationship of the new concept with previous concepts is studied and the characteristics of this concept is investigated through important theorems that determine the position of this set in relation to sets that have been studied or that will be presented later. Also, generalizations of the functions are presented according to the concept, their properties are studied, and some necessary examples that show the properties of this concept and its relationships.
本文利用已有的模糊- αm闭集,提出并研究了双模糊拓扑空间中一类新的广义闭集。这个新类称为模糊αm - g *模糊闭集。研究了新概念与先前概念的关系,并通过一些重要的定理来研究这个概念的特征,这些定理决定了这个集合相对于已经研究过或将在后面提出的集合的位置。根据这一概念给出了函数的推广,研究了函数的性质,并举例说明了这一概念的性质及其相互关系。
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引用次数: 0
Z-prime gamma submodule of gamma modules 模的子模的z
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2022.5461
Ali Abd Alhussein Zyarah, Ahmad Hadi Hussain, H. K. Zghair
Let $R$ be a $Gamma$-ring and $partial$ be an $RGamma$-module. A proper $RGamma$-submodule. $T$ of an $RGamma$-module $partial$ is called Z-prime $RGamma$-submodule if for each $tin partial, gamma in Gamma$ and $f in partial^{ast}=Hom_{R_{Gamma}}(partial,R),f(t)gamma t in T$ implies that either $t in T$ or $f(t)in [T: _{R_{Gamma}} partial]$. The purpose of this paper is to introduce interesting theorems and properties of Z- prime $RGamma$-submodule of $RGamma$-module and the relation of Z-prime $RGamma$-submodule, which represents of generalization Z-prime R-submodule of R-module.
设$R$是$Gamma$-环,$partial$是$RGamma$-模。一个合适的$RGamma$-子模块。$RGamma$-模块$partial$的$T$称为z ' $RGamma$-子模块,如果对于每个$tin partial, gamma $和$f in partial^{ast}=Hom_{R_{gamma}}(partial,R),f(T)gamma T in T$意味着$T in T$或$f(T)in [T: _{R_{gamma}} partial]$。本文的目的是介绍$RGamma$-模的Z-素数$RGamma$-子模的一些有趣的定理和性质,以及表示r -模的推广Z-素数$RGamma$-子模的Z-素数$RGamma$-子模之间的关系。
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引用次数: 0
Mathematical analysis wavelets characteristics and their applications 数学分析小波特性及其应用
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2022.5602
Ali Naji Shaker
Wavelets are now perceived as a ground-breaking new mathematical apparatus in signal and picture handling, time arrangement analysis, geophysics, guess hypothesis, and numerous various zones. Wavelet analysis has been an effective way to deal with issues related to analysing a signal in both time and frequency areas. Analysing a non-stationary signal becomes difficult for the various transform methods. Wavelet transforms techniques like Fourier Transform (FT), short-time Fourier transforms (STFT), and wavelet transform (WT) methods and their application are also discussed in detail. Wavelet analysis can be applied to one-dimensional signals like audio signals as well as two-dimensional signals like images. However wavelet processing has wide applications, some of the applications and methods are discussed in the paper.
小波现在被认为是在信号和图像处理、时间安排分析、地球物理学、猜测假设和许多不同区域中具有开创性的新数学工具。小波分析是处理信号时域和频域分析问题的一种有效方法。对于各种变换方法来说,分析非平稳信号变得很困难。详细讨论了傅里叶变换(FT)、短时傅里叶变换(STFT)和小波变换(WT)等小波变换技术及其应用。小波分析既可以应用于音频信号等一维信号,也可以应用于图像等二维信号。然而,小波处理有着广泛的应用,本文讨论了小波处理的一些应用和方法。
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引用次数: 0
Solving partial differential equations via a hybrid method between homotopy analytical method and Harris hawks optimization algorithm 利用同伦解析法和哈里斯霍克优化算法的混合方法求解偏微分方程
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2022.5555
A. A. Ahmad
In this article, a modern analytical technique called Homotopy Analysis Method (HAM) has been applied to several partial differential equations to obtain their sequential solution. The performance of the method was analysed on partial differential equations and found to be computationally efficient. The homotopy analysis method (HAM) has been found to be effective. The numerical results have been improved by proposing a new technique that combines the numerical method with the Harris Hawks Optimization algorithm. The current numerical results are compared to the exact solutions and it's found to be in very good results.
本文将一种称为同伦分析法(HAM)的现代分析方法应用于若干偏微分方程的序列解。对该方法在偏微分方程上的性能进行了分析,结果表明该方法计算效率高。同伦分析方法(HAM)已被证明是有效的。提出了一种将数值方法与Harris Hawks优化算法相结合的新方法,改善了数值结果。将目前的数值结果与精确解进行了比较,得到了很好的结果。
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引用次数: 1
期刊
International Journal of Nonlinear Analysis and Applications
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