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On the Construction of Traveling Water Waves with Constant Vorticity and Infinite Boundary 恒涡量无限边界行水波的构造
Pub Date : 2023-01-06 DOI: 10.1155/2023/6317674
Pawan Shrestha, KC DurgaJang, Ramjee Sharma
The issue of whether there is a closed orbit in the water waves in an infinite boundary condition is an outstanding open problem. In this work, we first discuss the various developments on the structure of water waves in the context of finite bottom conditions. We then focus on the behavior of water for the kinematic boundary for the infinite depth. We present some findings to address this issue by creating a water wave profile for the zero and constant vorticity conditions through the application of the Crandall–Rabinowitz theorem.
在无限边界条件下,水波是否存在闭合轨道是一个突出的开放性问题。在这项工作中,我们首先讨论了有限底条件下水波结构的各种发展。然后,我们将重点放在无限深度的运动边界的水的行为上。我们通过应用克兰德尔-拉比诺维茨定理,建立了零涡度和等涡度条件下的水波剖面,提出了一些研究结果来解决这个问题。
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引用次数: 0
Primal Topologies on Finite-Dimensional Vector Spaces Induced by Matrices 矩阵诱导的有限维向量空间上的原始拓扑
Pub Date : 2023-01-06 DOI: 10.1155/2023/9393234
Luis Mejías Alvarez, J. Vielma, Á. Guale, E. Pineda
Given an matrix A , considered as a linear map A:nn , then A induces a topological space structure on n which differs quite a lot from the usual one (induced by the Euclidean metric). This new topological structure on n has very interesting properties with a nice special geometric flavor, and it is a particular case of the so called “primal space,” In particular, some algebraic information can be shown in a topological fashion and the other way around. If X is a non-empty set and f
给定矩阵A,将其视为线性映射A:1 × 1,然后A在一个与通常的拓扑空间结构(由欧几里得度规导出)有很大不同的拓扑空间结构上。这个新的拓扑结构在n上有非常有趣的性质具有很好的特殊几何风格,它是所谓的“原始空间”的一个特殊情况,特别是,一些代数信息可以用拓扑的方式来表示,也可以用拓扑的方式来表示。如果X是一个非空集合,且f:X是一张地图,存在由f在X上诱导出的拓扑τ f,定义为τ f = U∧X:f−1uU .对X,τ f称为由f诱导的原始空间。本文研究了矩阵在向量空间上诱导出的原空间结构的一些特征;特别地,我们描述了这种情况下各自空间的几何性质。
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引用次数: 1
Cyber Loss Distribution Fitting: A General Framework towards Cyber Bonds and Their Pricing Models 网络损失分布拟合:网络债券及其定价模型的一般框架
Pub Date : 2022-12-31 DOI: 10.1155/2022/7689828
Oleg M. Kolesnikov, Alexander Markov, D. Smagulov, Sergejs Solovjovs
Motivated by the considerable amount of losses in (finance) industry caused every year by the fast growing number of malicious cyber events and the need of an insurance against such cyber losses, we propose a general framework of cyber bond, whose main purpose is to insure (compensate) losses of a cyber attack. Based on a database of publicly available cyber events, we determine cyber loss distribution parameters and use them to numerically simulate cyber bond price, yield, and other characteristics. We also study two approaches to cyber bond coupon calculation.
鉴于恶意网络事件数量的快速增长,每年给(金融)行业造成的巨大损失,以及对此类网络损失的保险需求,我们提出了一个网络债券的总体框架,其主要目的是为网络攻击的损失提供保险(补偿)。基于公开可用的网络事件数据库,我们确定了网络损失分布参数,并用它们来数值模拟网络债券的价格、收益率和其他特征。本文还研究了两种计算网络债券息票的方法。
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引用次数: 0
Solving Multispecies Lotka-Volterra Equations by the Daftardar-Gejji and Jafari Method 用Daftardar-Gejji和Jafari方法求解多物种Lotka-Volterra方程
Pub Date : 2022-12-26 DOI: 10.1155/2022/1839796
B. Batiha, F. Ghanim, O. Alayed, R. Hatamleh, A. S. Heilat, Hamzeh H. Zureigat, O. Bazighifan
In this article, we apply the Daftardar-Gejji and Jafari method (DJM) to solve the multispecies Lotka–Volterra equation. A comparison between the DJM, differential transformation method (DTM), the variational iteration method (VIM), and Adomian decomposition method (ADM) shows that the DJM is a reliable and powerful method for solving nonlinear equations. The efficiency and applicability of this method are confirmed by considering some examples. The proposed procedure provides better results in comparison to some existing methods.
本文应用Daftardar-Gejji和Jafari方法(DJM)求解多物种Lotka-Volterra方程。将DJM与微分变换法(DTM)、变分迭代法(VIM)和Adomian分解法(ADM)进行了比较,结果表明DJM是一种可靠、有效的求解非线性方程的方法。算例验证了该方法的有效性和适用性。与现有的一些方法相比,所提出的方法提供了更好的结果。
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引用次数: 5
Permanents of Hexagonal and Armchair Chains 六边形和扶手椅链的永久物
Pub Date : 2022-11-25 DOI: 10.1155/2022/7786922
O. Nekooei, H. Barzegar, A. Ashrafi
The permanent is important invariants of a graph with some applications in physics. If G is a graph with adjacency matrix A=aij , then the permanent of A is defined as permA=σSni=1
作为我们工作的结果,证明了G k和H k分别表示六边形和扶手椅链,分别然后烫发a1= 4,烫发A G k= k + 1 2, k≥2;烫发hk= 4 k <m
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引用次数: 0
Reflection of Plane Waves in Nonlocal Fractional-Order Thermoelastic Half Space 非局部分数阶热弹性半空间中平面波的反射
Pub Date : 2022-11-21 DOI: 10.1155/2022/1223847
Surbhi Sharma, Sangeeta Kumari
The problem of plane waves in nonlocal fractional-order thermoelasticity has been studied. We have considered the x-y plane for the governing equation of nonlocal fractional thermoelasticity and solved these governing equations to calculate the equation in terms of frequency. This frequency shows that three sets of waves exist, in which two are coupled and one is uncoupled. The reflection coefficient of plane waves for classical theory and LS theory has been calculated. The effect of phase speeds, specific losses, and attenuation coefficients with respect to the frequency and nonlocal parameter for the two theories (LS theory and the classical theory of thermoelasticity) has been studied numerically for all propagating waves, and the same has been plotted graphically and explained thoroughly.
研究了非局部分数阶热弹性中的平面波问题。我们考虑了非局部分数阶热弹性控制方程的x-y平面,并对这些控制方程进行了求解,以计算频率方程。这个频率表明存在三组波,其中两组是耦合的,一组是不耦合的。计算了经典理论和LS理论的平面波反射系数。对两种理论(LS理论和经典热弹性理论)的相速、比损耗和衰减系数对频率和非局部参数的影响进行了数值研究,并对所有传播波进行了图解和详细解释。
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引用次数: 2
Multiplicity Results for Weak Solutions of a Semilinear Dirichlet Elliptic Problem with a Parametric Nonlinearity 一类具有参数非线性的半线性Dirichlet椭圆型问题弱解的多重性结果
Pub Date : 2022-11-17 DOI: 10.1155/2022/6011860
Ayékotan M. J. Tchalla, K. Tcharie
This paper deals with the existence of weak solutions to a Dirichlet problem for a semilinear elliptic equation involving the difference of two main nonlinearities functions that depends on a real parameter λ . According to the values of λ , we give both nonexistence and multiplicity results by using variational methods. In particular, we first exhibit a critical positive value such that the problem admits at least a nontrivial non-negative weak solution if and only if λ is greater than or equal to this critical value. Furthermore, for λ greater than a second critical positive value, we show the existence of two independent nontrivial non-negative weak solutions to the problem.
本文讨论了一类半线性椭圆型方程的Dirichlet问题弱解的存在性,该方程涉及与实参数λ有关的两个主要非线性函数的差。根据λ的值,用变分方法给出了非存在性和多重性的结果。特别地,我们首先展示了一个临界值,使得当且仅当λ大于或等于这个临界值时,问题至少允许一个非平凡非负弱解。进一步,当λ大于第二个临界值时,我们证明了该问题存在两个独立的非平凡非负弱解。
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引用次数: 0
Affine Magic Cubes of Order 4: Concepts and Applications 4阶仿射魔方:概念与应用
Pub Date : 2022-10-26 DOI: 10.1155/2022/2578562
Siriyakorn Duangmoon, Praphon Kanokladarom, Suchada Pongprasert, T. Rungratgasame, Natsima Srithaisong
We convert a classical magic cube of order 4, which is an arrangement of 1,2,,64 , to a cube of order 4 whose entries belong to F26 . By using finite-dimensional vector spaces over the field F2 , we introduce the notion of affine magic cubes and study their properties. The obtained results can be applied to describe some features of various types of magic cubes of order 4.
我们转换一个4阶的经典魔方,它是1、2、…、64的排列,到一个4阶的立方体,它的元素属于f26。利用场f2上的有限维向量空间,引入仿射幻立方的概念,研究了仿射幻立方的性质。所得结果可用于描述各种类型的4阶幻立方的某些特征。
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引用次数: 0
Chemical Reaction and Generalized Heat Flux Model for Powell-Eyring Model with Radiation Effects 考虑辐射效应的Powell-Eyring模型的化学反应与广义热流密度模型
Pub Date : 2022-10-26 DOI: 10.1155/2022/4076426
F. Salah
In the current research, the numerical solutions for heat transfer in an Eyring–Powell fluid that conducts electricity past an exponentially growing sheet with chemical reactions are examined. As the sheet is stretched in the x direction, the flow occupies the region   y > 0 . MHD, radiation, joule heating effects, and thermal relaxation time are all used to represent the flow scenario. The emergent problem is represented using PDEs, which are then converted to ODEs using appropriate similarity transformations. The converted problem is solved numerically using the SLM method. The main goal of this paper is to compare the results of solving the velocity and temperature equations in the presence of   K changes through SLM, introducing it as a precise and appropriate method for solving nonlinear differential equations. Tables with the numerical results are created for comparison. This contrast is important because it shows how precisely the successive linearization method can resolve a set of nonlinear differential equations. Following that, the generated solution is studied and explained in relation to a variety of engineering parameters. Additionally, the thermal relaxation period is inversely proportional to the thickness of the thermal boundary layer and the temperature, but the Eckert number E c is the opposite. As E c grows, the temperature within the channel increases.
在目前的研究中,研究了导电通过指数增长片的埃灵-鲍威尔流体传热的数值解。当薄片在x方向上拉伸时,流动占据了y > 0的区域。MHD、辐射、焦耳热效应和热松弛时间都被用来表示流动情景。紧急问题使用pde表示,然后使用适当的相似性转换将其转换为ode。利用SLM方法对转换问题进行了数值求解。本文的主要目的是比较在存在K变化的情况下用SLM求解速度方程和温度方程的结果,介绍它是求解非线性微分方程的一种精确而合适的方法。创建带有数值结果的表以进行比较。这种对比很重要,因为它显示了连续线性化方法如何精确地求解一组非线性微分方程。然后,根据各种工程参数对生成的解进行了研究和解释。热弛豫周期与热边界层厚度和温度成反比,而Eckert数则相反。随着E - c的增加,通道内的温度升高。
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引用次数: 2
Generalized Fubini Apostol-Type Polynomials and Probabilistic Applications 广义Fubini apostoltype多项式及其概率应用
Pub Date : 2022-10-07 DOI: 10.1155/2022/2853920
R. Gomaa, A. Magar
The paper aims to introduce and investigate a new class of generalized Fubini-type polynomials. The generating functions, special cases, and properties are introduced. Using the generating functions, various interesting identities, and relations are derived. Also, special polynomials are obtained from the general class of polynomials. Finally, probabilistic applications and some probabilistic properties are obtained.
本文旨在介绍和研究一类新的广义富比尼型多项式。介绍了生成函数、特殊情况和属性。利用生成函数,推导出各种有趣的恒等式和关系。此外,还可以从一般多项式中得到特殊多项式。最后,给出了该方法的概率应用和一些概率性质。
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引用次数: 0
期刊
Int. J. Math. Math. Sci.
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