Mathematics and Computers in Simulation最新文献_第5页

Numerical algorithms for the reconstruction of space-dependent sources in thermoelasticity 热弹性中空间相关源重建的数值算法

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-23 DOI: 10.1016/j.matcom.2025.04.004

Frederick Maes , Karel Van Bockstal

引用次数: 0

Convergence of individual opinions during a bi-virus epidemic and its impact 双病毒流行期间个人意见的趋同及其影响

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-22 DOI: 10.1016/j.matcom.2025.04.006

Shidong Zhai , Zhenmei Zhang , Jun Ma

{"title":"Convergence of individual opinions during a bi-virus epidemic and its impact","authors":"Shidong Zhai , Zhenmei Zhang , Jun Ma","doi":"10.1016/j.matcom.2025.04.006","DOIUrl":"10.1016/j.matcom.2025.04.006","url":null,"abstract":"<div><div>This paper investigates the intricate interplay between individual opinions and bi-virus transmission in a city or country. The proposed model considers two competing viruses, where virus transmission is shaped by individuals’ perceptions of the epidemic, which are, in turn, influenced by the transmission dynamics. Building on the concept of an opinion-dependent reproduction number, we conduct a rigorous theoretical analysis of the proposed model, focusing on equilibrium stability and parameter sensitivity. From the analysis of simulated data, we derive the following insights: (1) Negative opinions during an epidemic, such as believing the epidemic is not severe or distrusting public health measures, may result in inaccurate community responses and potentially reignite outbreaks. (2) In the bi-virus-opinion model, while perceived epidemic severity can reduce infection rates, it does not alter the dominance of the prevailing virus under conditions of high epidemic severity. Furthermore, we examine the role of stubborn opinions to reshape public perception, which can facilitate epidemic eradication under mild epidemic conditions. In the case of dual-virus competition, stubborn opinions can alter the final competitive outcomes. Finally, numerical simulations are performed to validate the findings and corroborate them with real-world data from the SARS-CoV-2 pandemic.</div></div>","PeriodicalId":49856,"journal":{"name":"Mathematics and Computers in Simulation","volume":"236 ","pages":"Pages 334-353"},"PeriodicalIF":4.4,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic analysis of layered elastic medium by TD-BEM using the iteration technique in the whole time domain 采用全时域迭代技术对层状弹性介质进行动力学分析

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-20 DOI: 10.1016/j.matcom.2025.04.018

Xiaofei Qin , Hongjun Li , Changnv Zeng

引用次数: 0

Complex dynamics and encryption application of a 3D dual-memristor oscillatory hyperchaotic map 三维双忆阻振荡超混沌映射的复杂动力学及加密应用

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-19 DOI: 10.1016/j.matcom.2025.04.005

Qiang Lai , Chongkun Zhu , Minghong Qin , Zhiqiang Wan

引用次数: 0

Valuation of European call options for the Scott’s stochastic volatility model: An explicit finite difference scheme Scott随机波动率模型下欧式看涨期权的估值：一种显式有限差分格式

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-17 DOI: 10.1016/j.matcom.2025.03.033

Freddy H. Marín-Sánchez , Alejandro Pinilla Barrera , Cristhian Montoya Zambrano , Santiago Medina Hurtado

引用次数: 0

Domain truncation error analysis for a multidimensional system of PDEs of option prices 期权价格偏微分方程多维系统的域截断误差分析

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-17 DOI: 10.1016/j.matcom.2025.04.002

Anindya Goswami , Kuldip Singh Patel

引用次数: 0

Global dynamics and optimal control strategies for the brucellosis model with environmental saturation infection: An assessment of severely affected provinces in China 具有环境饱和感染的布鲁氏菌病模型的全局动态与最优控制策略——中国严重感染省份的评估

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-17 DOI: 10.1016/j.matcom.2025.04.008

Caihong Song , Zigen Song

{"title":"Global dynamics and optimal control strategies for the brucellosis model with environmental saturation infection: An assessment of severely affected provinces in China","authors":"Caihong Song , Zigen Song","doi":"10.1016/j.matcom.2025.04.008","DOIUrl":"10.1016/j.matcom.2025.04.008","url":null,"abstract":"<div><div>In this paper, we develop a multidimensional dynamic model involving the sheep population, the human population, and the brucella in the environment to explore the potential impact of key factors on brucellosis in six high-prevalence provinces in China. The transmission of environment-to-individual in this model is described in the form of saturated infections. We first determine the basic reproduction number <span><math><msub><mrow><mi>R</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> and analyze the global asymptotic stability of the disease-free and endemic equilibriums by introducing the Volterra–Lyapunov stability matrix theory into the classical Lyapunov function method. Secondly, by using actual human brucellosis data from these provinces over the past 18 years to estimate the parameter values in the model, we have determined that the current basic reproduction numbers of brucellosis in these regions are greater than 1. This implies that brucellosis will persist in these provinces under the current control efforts. Our simulation results indicate that the most effective strategy for reducing the disease burden in these provinces is to simultaneously increase the intensity of vaccination efforts and strengthen the culling of infected sheep. Utilizing Pontryagin’s maximum principle, we derive temporal outcomes for the implementation of a strategy aimed at achieving minimal costs. Furthermore, we find that, under lower cost constraints, the culling measures can be executed at maximum intensity for an extended duration while maintaining the existing vaccination schedule. These findings can provide important insights for relevant prevention and control efforts.</div></div>","PeriodicalId":49856,"journal":{"name":"Mathematics and Computers in Simulation","volume":"236 ","pages":"Pages 379-410"},"PeriodicalIF":4.4,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A modeling investigation of the disease severity driven by COVID-19-induced diabetic patients 新型冠状病毒感染糖尿病患者疾病严重程度模型研究

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-17 DOI: 10.1016/j.matcom.2025.04.011

Ashabul Hoque , Razia Sultana , Hamidul Islam , Abdul Malek

{"title":"A modeling investigation of the disease severity driven by COVID-19-induced diabetic patients","authors":"Ashabul Hoque , Razia Sultana , Hamidul Islam , Abdul Malek","doi":"10.1016/j.matcom.2025.04.011","DOIUrl":"10.1016/j.matcom.2025.04.011","url":null,"abstract":"<div><div>In this study, we introduce a novel SEICHR compartmental model to explore the transmission dynamics of COVID-19 among diabetic and non-diabetic patients, with a particular focus on the impact of COVID-19-induced diabetes on disease progression. The well-posedness of the model and the stability of the equilibrium points are confirmed through rigorous mathematical analysis. Mathematical results are validated using numerical simulations. Sensitivity and bifurcation analyses are conducted to determine the most sensitive parameters in the proposed model. The sensitivity of the model parameters is examined using the partial rank correlation coefficients (PRCC) analysis. The results show that the disease progression rate is higher among COVID-19 infected diabetic patients than non-diabetic patients. Numerical simulations further indicate that the forward bifurcation region expands progressively with increasing rates of disease development. The role of COVID-19-induced diabetic patients in exacerbating disease severity is examined through both constant and progressive delays in hospital isolation. Notably, the progressive waiting time exerts a significantly greater impact on transmission dynamics than the constant waiting time.</div></div>","PeriodicalId":49856,"journal":{"name":"Mathematics and Computers in Simulation","volume":"237 ","pages":"Pages 213-230"},"PeriodicalIF":4.4,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability, bifurcation and characteristics of chaos in a new commensurate and incommensurate fractional-order ecological system 一种新的相称与不相称分数阶生态系统的稳定性、分岔与混沌特征

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-17 DOI: 10.1016/j.matcom.2025.04.015

Jiayi Liu, Ruihong Li, Dongmei Huang

{"title":"Stability, bifurcation and characteristics of chaos in a new commensurate and incommensurate fractional-order ecological system","authors":"Jiayi Liu, Ruihong Li, Dongmei Huang","doi":"10.1016/j.matcom.2025.04.015","DOIUrl":"10.1016/j.matcom.2025.04.015","url":null,"abstract":"<div><div>In this paper, a new incommensurate fractional-order ecological system describing the interaction between permafrost melting, vegetation degradation and temperature is introduced to explore its dynamical behavior. At first, the existence and uniqueness of the new system is proved utilizing Picard’s operator and Banach fixed-point theorem. Next, the influence of simultaneous changing system parameter and fractional orders on the stability of the incommensurate system is discussed, and the degree of influence of each fractional order is visually compared and analyzed. In addition, it is also indicated that parameter changes can cause the static bifurcation. Subsequently, the sufficient conditions and an analytical expression for the critical value of Hopf bifurcation caused by system parameter in the incommensurate fractional-order ecological system are provided for the first time, and the bifurcation diagrams are utilized to verify the result. Furthermore, by observing the bifurcation diagram of incommensurate and corresponding commensurate system, it can be deduced that changes in the fractional orders of incommensurate system can cause Hopf bifurcation to be postponed or advanced. Then, the chaotic behaviors of commensurate and incommensurate system are explored by utilizing multiple numerical indicators. It is worth noting that there exists a path from quasi-periodic motion to chaos in the system. Finally, the chaotic domain is proposed to investigate the influence of fractional orders and parameter on chaotic behaviors in the incommensurate fractional-order system.</div></div>","PeriodicalId":49856,"journal":{"name":"Mathematics and Computers in Simulation","volume":"236 ","pages":"Pages 248-269"},"PeriodicalIF":4.4,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An enhanced Kepler optimization algorithm with global attraction model and dynamic neighborhood search for global optimization and engineering problems 基于全局吸引模型和动态邻域搜索的改进Kepler优化算法求解全局优化和工程问题

IF 4.4 2区数学

Mathematics and Computers in Simulation Pub Date : 2025-04-15 DOI: 10.1016/j.matcom.2025.04.003

Ziyuan Liang, Zhenlei Wang

{"title":"An enhanced Kepler optimization algorithm with global attraction model and dynamic neighborhood search for global optimization and engineering problems","authors":"Ziyuan Liang, Zhenlei Wang","doi":"10.1016/j.matcom.2025.04.003","DOIUrl":"10.1016/j.matcom.2025.04.003","url":null,"abstract":"<div><div>The Kepler optimization algorithm (KOA) is a recently proposed physics-based algorithm inspired by Kepler’s laws. Despite the strong competitiveness of KOA relative to established algorithms, it faces challenges such as limited search capability, premature convergence, and low convergence accuracy in solving complex optimization problems. To address these shortcomings, we propose an enhanced KOA (EKOA) that integrates a global attraction model, a dynamic neighborhood search operator, and a local update strategy with multi-elite guided differential mutation. Firstly, EKOA introduces an innovative global attraction model to facilitate information exchange among individuals, aiming to extend the search space and improve search efficiency. Secondly, a dynamic neighborhood search operator is designed to weaken the influence of the best individual on the current position updates, thereby mitigating premature convergence. Finally, a local update strategy with multi-elite guided differential mutation is developed to provide new evolutionary opportunities for individuals, ensure evolution in a more favorable direction, and prevent stagnation of the optimal solution during the optimization process. The performance of EKOA is evaluated by comparing it with 12 state-of-the-art algorithms using the CEC2017, CEC2020, and CEC2022 benchmark test suites. Experimental results and statistical analysis substantiate the superiority of EKOA. Additionally, the practical applicability of EKOA is demonstrated through four real-world engineering problems. In conclusion, EKOA not only effectively enhances the performance of the original KOA but also emerges as a powerful and promising algorithm for solving complex engineering problems.</div></div>","PeriodicalId":49856,"journal":{"name":"Mathematics and Computers in Simulation","volume":"237 ","pages":"Pages 107-144"},"PeriodicalIF":4.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0