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Stability analysis and numerical simulations of the fractional COVID-19 pandemic model 新冠肺炎部分传染病模型的稳定性分析与数值模拟
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-30 DOI: 10.1515/ijnsns-2021-0042
Ahmad Alalyani, S. Saber
Abstract The purpose of this article is to formulate a simplified nonlinear fractional mathematical model to illustrate the dynamics of the new coronavirus (COVID-19). Based on the infectious characteristics of COVID-19, the population is divided into five compartments: susceptible S(t), asymptomatic infection I(t), unreported symptomatic infection U(t), reported symptomatic infections W(T) and recovered R(t), collectively referred to as (SIUWR). The existence, uniqueness, boundedness, and non-negativeness of the proposed model solution are established. In addition, the basic reproduction number R 0 is calculated. All possible equilibrium points of the model are examined and their local and global stability under specific conditions is discussed. The disease-free equilibrium point is locally asymptotically stable for R 0 leq1 and unstable for R 0 > 1. In addition, the endemic equilibrium point is locally asymptotically stable with respect to R 0 > 1. Perform numerical simulations using the Adams–Bashforth–Moulton-type fractional predictor–corrector PECE method to validate the analysis results and understand the effect of parameter variation on the spread of COVID-19. For numerical simulations, the behavior of the approximate solution is displayed in the form of graphs of various fractional orders. Finally, a brief conclusion about simulation on how to model transmission dynamics in social work.
摘要本文的目的是建立一个简化的非线性分数阶数学模型,以说明新型冠状病毒(新冠肺炎)的动力学。根据新冠肺炎的传染特征,将人群分为五个区:易感S(t)、无症状感染I(t),未报告的有症状感染U(t)和报告的症状感染W(t)以及康复R(t)。统称为(SIUWR)。建立了模型解的存在性、唯一性、有界性和非否定性。此外,计算基本再现次数R0。考察了模型的所有可能平衡点,讨论了它们在特定条件下的局部和全局稳定性。无病平衡点对R0 leq1是局部渐近稳定的,对R0>1是不稳定的。此外,地方性平衡点对于R0>1是局部渐近稳定的。使用Adams–Bashworth–Moulton型分数预测器-校正器PECE方法进行数值模拟,以验证分析结果并了解参数变化对新冠肺炎传播的影响。对于数值模拟,近似解的行为以各种分数阶的图形的形式显示。最后,对如何对社会工作中的传播动力学进行建模的仿真做了简要的总结。
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引用次数: 8
The modified Rusanov scheme for solving the phonon-Bose model 求解声子-玻色模型的改进Rusanov格式
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-26 DOI: 10.1515/ijnsns-2021-0305
Kamel Mohamed, M. Abdelrahman
Abstract This paper considers the one-dimensional model of heat conduction in solids at low temperature, the so called phonon-Bose model. The nonlinear model consists of a conservation equation for the energy density e and the heat flux Q with ∣Q∣ < e. We present a simple and accurate class of finite volume schemes for numerical simulation of heat flow in arteries. This scheme consists of predictor and corrector steps, the predictor step contains a parameter of control of the numerical diffusion of the scheme, which modulate by using limiter theory and Riemann invariant, the corrector step recovers the balance conservation equation, the scheme can compute the numerical flux corresponding the real state of solution without relying on Riemann problem solvers and it can thus be turned to order 1 in the regions where the flow has a strong variation and to order 2 in the regions where the flow is regular. The numerical test cases demonstrate high resolution of the proposed finite volume scheme (modified Rusanov) and confirm its capability to provide accurate simulations for heat flow under flow regimes with strong shocks.
摘要本文考虑固体低温下的一维热传导模型,即声子-玻色模型。非线性模型由能量密度e和热流Q守恒方程组成,其中∣Q∣< e。我们给出了一类简单而精确的有限体积格式,用于动脉热流的数值模拟。该方案由预测步和校正步组成,预测步包含一个控制方案数值扩散的参数,该参数利用极限理论和黎曼不变量进行调制,校正步恢复平衡守恒方程;该格式可以在不依赖黎曼问题求解器的情况下计算出与解的实际状态相对应的数值通量,因此可以在流量变化较大的区域将其转换为1阶,在流量规律的区域将其转换为2阶。数值测试用例证明了所提出的有限体积格式(改进的Rusanov)的高分辨率,并证实了它能够提供强激波流型下热流的精确模拟。
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引用次数: 2
Wellposedness of impulsive functional abstract second-order differential equations with state-dependent delay 具有状态相关时滞的脉冲泛函抽象二阶微分方程的适定性
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-23 DOI: 10.1515/ijnsns-2021-0160
K. Karthikeyan, D. Tamizharasan, T. Abdeljawad, K. Nisar
Abstract This study investigates the functional abstract second order impulsive differential equation with state-dependent delay. The major result of this study is that the abstract second-order impulsive differential equation with state-dependent delay system has at least one solution and is unique. After that, the wellposed condition is defined. Following that, we look at whether the proposed problem is wellposed. Finally, some illustrations of our findings are provided.
摘要本文研究了具有状态相关时滞的泛函抽象二阶脉冲微分方程。该研究的主要结果是,具有状态相关时滞系统的抽象二阶脉冲微分方程至少有一个解,并且是唯一的。然后,定义了适定条件。接下来,我们将研究所提出的问题是否合理。最后,对我们的研究结果进行了说明。
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引用次数: 0
Perceptual evaluation for Zhangpu paper-cut patterns by using improved GWO-BP neural network 基于改进GWO-BP神经网络的张浦剪纸图案感知评价
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-23 DOI: 10.1515/ijnsns-2021-0007
Daoling Chen, Pengpeng Cheng
Abstract In order to understand consumers’ perceptual cognition of Zhangpu paper-cut patterns and grasp the innovative application direction. The four design elements of paper-cut patterns were extracted by morphological analysis, and representative perceptual vocabulary were selected using Kansei engineering theory and factor analysis, then the design elements and perceptual evaluation scores of representative words are used as the input and output data of the GWO-BP neural network, respectively, to establish an intelligent model that can predict consumers’ perceptual cognition of paper-cut patterns. To verify the superiority of the model, the predicted result of BP and FA-BP are compared with GWO-BP neural network. The results show that although the convergence speed of the GWO-BP model is slightly lower than that of the FA-BP model, its prediction accuracy is significantly better than other algorithms. Designers can use the model to quickly redesign the paper-cut pattern to better meet the aesthetic needs of modern consumers.
摘要了解消费者对漳浦剪纸图案的感性认知,把握创新应用方向。通过形态学分析提取剪纸图案的四个设计元素,并利用Kansei工程理论和因子分析选择具有代表性的感知词汇,然后将代表性词汇的设计元素和感知评价得分分别作为GWO-BP神经网络的输入和输出数据,建立一个能够预测消费者对剪纸图案感知认知的智能模型。为了验证该模型的优越性,将BP和FA-BP的预测结果与GWO-BP神经网络进行了比较。结果表明,虽然GWO-BP模型的收敛速度略低于FA-BP模型,但其预测精度明显优于其他算法。设计师可以利用该模型快速重新设计剪纸图案,更好地满足现代消费者的审美需求。
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引用次数: 0
Generalization method of generating the continuous nested distributions 生成连续嵌套分布的泛化方法
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-20 DOI: 10.1515/ijnsns-2021-0231
Mian Muhammad Farooq, Muhammad Mohsin, M. Farman, A. Akgül, M. Saleem
Abstract In many life time scenarios, life of one component or system nested in other components or systems. To model these complex structures some so called nested models are required rather than conventional models. This paper introduces the generalization of the method of generating continuous distribution proposed by N. Eugene, C. Lee, and F. Famoye, “Beta-normal distribution and its applications,” Commun. Stat. Theor. Methods, vol. 31, no. 4, pp. 497–512, 2002 and A. Alzaatreh, C. Lee, and F. Famoye, “A new method for generating families of continuous distributions,” Metron, vol. 71, no. 1, pp. 63–79, 2013 which nest one model in other to cope with complex systems. Some important characteristics of the proposed family of generalized distribution have been studied. The famous Beta, Kumaraswami and Gamma generated distributions are special cases of our suggested procedure. Some new distributions have also been developed by using the suggested methodology and their important properties have been discussed as well. A variety of real life data sets are used to demonstrate the efficacy of new suggested distributions and illation is made with baseline models.
在许多生命周期场景中,一个组件或系统的生命周期嵌套在其他组件或系统中。为了对这些复杂的结构进行建模,需要一些所谓的嵌套模型,而不是传统的模型。本文介绍了N. Eugene, C. Lee和F. Famoye在“beta -正态分布及其应用”中提出的生成连续分布方法的推广。统计理论的。方法,第31卷,第5期。A. Alzaatreh、C. Lee和F. Famoye,“连续分布族生成的一种新方法”,《数学学报》,第71卷,第1期。1, pp. 63 - 79,2013,其中一个模型嵌套在另一个模型中以应对复杂系统。本文研究了广义分布族的一些重要特征。著名的Beta、Kumaraswami和Gamma生成的分布是我们建议的过程的特殊情况。使用所建议的方法还开发了一些新的分布,并讨论了它们的重要性质。各种现实生活数据集被用来证明新的建议分布的有效性,并与基线模型进行了验证。
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引用次数: 2
Novel periodic and optical soliton solutions for Davey–Stewartson system by generalized Jacobi elliptic expansion method 广义Jacobi椭圆展开法求解Davey-Stewartson系统的新周期光孤子解
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-20 DOI: 10.1515/ijnsns-2021-0349
M. Gaballah, R. El-Shiekh, L. Akinyemi, H. Rezazadeh
Abstract As Davey–Stewartson system is considered one of the most important models in optics, quantum physics, plasmas, and Bose–Einstein condensates. In this study, we have solved the Davey–Stewartson system using a modified Jacobi elliptic function methodology, and therefore many novel Jacobi elliptic wave function solutions were obtained, which degenerated to hypergeometric functions and periodic functions. The results obtained in this paper are novel in addition, contain other results achieved before in literatures. Moreover, some dynamic behavior for the periodic, kink type, and soliton wave propagation is demonstrated.
摘要As Davey–Stewartson系统被认为是光学、量子物理、等离子体和玻色-爱因斯坦凝聚体中最重要的模型之一。在本研究中,我们使用改进的Jacobi椭圆函数方法求解了Davey–Stewartson系统,因此获得了许多新的Jacobi椭圆形波函数解,这些解退化为超几何函数和周期函数。本文的结果是新颖的,包含了以前文献中的其他结果。此外,还证明了周期波、扭结波和孤立波传播的一些动力学行为。
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引用次数: 16
The Cădariu–Radu method for existence, uniqueness and Gauss Hypergeometric stability of a class of Ξ-Hilfer fractional differential equations 一类Ξ-Hilfer分数阶微分方程的存在唯一性和高斯超几何稳定性的c<e:1> dariu - radu方法
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-17 DOI: 10.1515/ijnsns-2021-0333
Safoura Rezaei Aderyani, R. Saadati, D. O’Regan
Abstract In this paper, we apply the Cădariu–Radu method derived from the Diaz–Margolis theorem to investigate existence, uniqueness approximation of Ξ-Hilfer fractional differential equations, and Hypergeometric stability for both finite and infinite domains. An example is given to illustrate the main result for a fractional system.
摘要本文应用由Diaz-Margolis定理导出的c dariu - radu方法,研究了Ξ-Hilfer分数阶微分方程在有限域和无限域的存在性、唯一性逼近以及超几何稳定性。给出了一个例子来说明分数系统的主要结果。
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引用次数: 2
Delta-shock for a class of strictly hyperbolic systems of conservation laws 一类严格双曲守恒律系统的Delta冲击
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-17 DOI: 10.1515/ijnsns-2021-0299
Shiwei Li
Abstract In this paper, a class of strictly hyperbolic systems of conservation laws which arises in connection with enhanced oil recovery is studied. The Riemann problem is solved analytically. The Riemann solutions with two kinds of different structures involving the delta-shock are obtained. For delta-shock, the generalized Rankine–Hugoniot relations and over-compressive delta-entropy condition are clarified. Further, the existence and uniqueness of delta-shock are established. The theoretical analysis is tested accurately by the numerical results.
摘要本文研究了一类与提高采收率有关的严格双曲守恒律系统。黎曼问题是解析求解的。得到了两种不同结构的三角形激波的黎曼解。对于delta冲击,阐明了广义Rankine–Hugoniot关系和过压缩delta熵条件。进一步证明了德尔塔冲击的存在性和唯一性。数值结果准确地检验了理论分析。
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引用次数: 0
Simulation of the crystallization processes by population balance model using a linear separation method 用线性分离方法用种群平衡模型模拟结晶过程
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-17 DOI: 10.1515/ijnsns-2021-0126
Zehra Pinar Izgi
Abstract Crystallization problem is one of the popular problems in wide area of science. The first principles are not used to design a crystallizer in which complicated processes include nucleation, crystal growth, attrition and agglomeration of crystals. It is modeled by the population balance model, which is one of the important models of mathematical biology and engineering, is a nonlinear partial integro-differential equation and examines the exchange of particles and the production of new particles in a system of particles. For the crystallization problem, one-dimensional and multi-dimensional models are considered and semi-analytical solutions are obtained via the linear separation method.
摘要结晶问题是目前科学界研究的热点问题之一。第一原理不用于设计结晶器,其中复杂的过程包括晶体的成核、晶体生长、磨损和团聚。它是由种群平衡模型建模的,种群平衡模型是数学生物学和工程的重要模型之一,是一个非线性偏积分微分方程,考察粒子系统中粒子的交换和新粒子的产生。对于结晶问题,考虑了一维和多维模型,并通过线性分离方法获得了半解析解。
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引用次数: 0
Impacts of heuristic parameters in PSO inverse kinematics solvers 启发式参数对PSO逆解的影响
IF 1.5 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2022-05-16 DOI: 10.1515/ijnsns-2020-0031
N. Rokbani, Raghvendra Kumar, A. Alimi, Pham Huy Thong, Ishaani Priyadarshini, Viet-Ha Nhu, Phuong Thao Thi Ngo
Abstract In this paper, an investigation is conducted in order to understand impacts of Particle Swarm Optimization (PSO) parameters on the convergence and the quality of the inverse kinematics solutions provided by the IK-PSO (inverse kinematics solver using PSO) – a heuristic inverse kinematics solver algorithm. Over a large panel of parameters investigations, a statistical proof of convergence is provided for 5 links to 60 links articulated system. A recommended set of parameters intervals are presented for this class of IK problems. Investigations are based on the standard inertia weight PSO, and concerned the impact of the inertia weight, the swarm size and the maximum iteration number. For a given set of parameters, the existence of a solution with a given position error is also proved. All tests were conducted over 100 times. The density of probability function, PDF, is used to approximate and analyze the fineness functions, which are the square of the position error. Results showed IK-PSO is an interesting IK solver when a set of good parameters are used. For these parameters, the algorithm showed a statistical proof of convergence with a high resolution, by mean of error position. The algorithm also showed time-effectiveness compared to CCD method, which is assumed to be a real-time IK heuristic solver used in gaming.
摘要在本文中,为了了解粒子群优化(PSO)参数对IK-PSO(使用PSO的逆运动学求解器)(一种启发式逆运动学求解算法)提供的逆运动学解的收敛性和质量的影响,进行了一项研究。在一个大型参数调查小组中,为5个链路到60个链路的铰接系统提供了收敛性的统计证明。为这类IK问题提供了一组推荐的参数间隔。研究基于标准惯性权重粒子群算法,关注惯性权重、群大小和最大迭代次数的影响。对于给定的一组参数,还证明了具有给定位置误差的解的存在性。所有测试都进行了100多次。概率函数密度PDF用于近似和分析精细度函数,精细度函数是位置误差的平方。结果表明,当使用一组好的参数时,IK-PSO是一个有趣的IK解算器。对于这些参数,该算法通过误差位置以高分辨率显示了收敛的统计证明。与CCD方法相比,该算法也显示出了时间有效性,CCD方法被认为是游戏中使用的实时IK启发式求解器。
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引用次数: 2
期刊
International Journal of Nonlinear Sciences and Numerical Simulation
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