Applied Mathematics and Computation最新文献_第8页

Convergence and stability in mean square of the stochastic θ-methods for systems of NSDDEs under a coupled monotonicity condition 耦合单调性条件下NSDDEs系统随机θ-方法的收敛性和均方稳定性

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-03-10 DOI: 10.1016/j.amc.2025.129395

Mengyao Niu, Yuanling Niu, Jiaxin Wei

引用次数: 0

Observer-based dynamic event-triggered second-level MPC for nonlinear time-delay CPSs under joint hybrid attacks 联合混合攻击下非线性时滞cps基于观测器的动态事件触发秒级MPC

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-03-06 DOI: 10.1016/j.amc.2025.129391

Hongchao Song , Zhenlei Wang , Xin Wang

引用次数: 0

Observer-based security control for nonlinear networked systems: The SCP model of semi-Markov kernel approach 基于观测器的非线性网络系统安全控制：半马尔可夫核方法的SCP模型

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-03-05 DOI: 10.1016/j.amc.2025.129394

Pei-Zhen Xia, Xiao-Heng Chang

引用次数: 0

Fixed-time stability criteria and adaptive state constrained control for uncertain switched nonlinear systems 不确定切换非线性系统的定时稳定性准则与自适应状态约束控制

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-03-05 DOI: 10.1016/j.amc.2025.129345

Shuo Liu , Huaguang Zhang , Hongbo Pang

引用次数: 0

Explicit solutions and finite-time stability for fractional delay systems 分数阶时滞系统的显式解与有限时间稳定性

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-03-01 DOI: 10.1016/j.amc.2025.129388

Ahmed M. Elshenhab , Xing Tao Wang , Mohamed Hosny

引用次数: 0

Construction of solutions of the Riemann problem for a two-dimensional Keyfitz-Kranzer type model governing a thin film flow 二维 Keyfitz-Kranzer 型薄膜流模型黎曼问题解的构建

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-02-28 DOI: 10.1016/j.amc.2025.129378

Anamika Pandey , Rahul Barthwal , T. Raja Sekhar

引用次数: 0

Symmetry and the Buchanan-Lillo conjecture: A resolution of the mixed feedback case 对称性与布坎南-利洛猜想：解决混合反馈问题

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-02-28 DOI: 10.1016/j.amc.2025.129376

Elena Braverman , John Ioannis Stavroulakis

{"title":"Symmetry and the Buchanan-Lillo conjecture: A resolution of the mixed feedback case","authors":"Elena Braverman , John Ioannis Stavroulakis","doi":"10.1016/j.amc.2025.129376","DOIUrl":"10.1016/j.amc.2025.129376","url":null,"abstract":"<div><div>Buchanan and Lillo both conjectured that oscillatory solutions of the first-order delay differential equation with positive feedback <span><math><msup><mrow><mi>x</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>(</mo><mi>t</mi><mo>)</mo><mo>=</mo><mi>p</mi><mo>(</mo><mi>t</mi><mo>)</mo><mi>x</mi><mo>(</mo><mi>τ</mi><mo>(</mo><mi>t</mi><mo>)</mo><mo>)</mo></math></span>, <span><math><mi>t</mi><mo>≥</mo><mn>0</mn></math></span>, where <span><math><mn>0</mn><mo>≤</mo><mi>p</mi><mo>(</mo><mi>t</mi><mo>)</mo><mo>≤</mo><mn>1</mn></math></span>, <span><math><mn>0</mn><mo>≤</mo><mi>t</mi><mo>−</mo><mi>τ</mi><mo>(</mo><mi>t</mi><mo>)</mo><mo>≤</mo><mn>2.75</mn><mo>+</mo><mi>ln</mi><mo>⁡</mo><mn>2</mn><mo>,</mo><mi>t</mi><mo>∈</mo><mi>R</mi></math></span>, are asymptotic to a shifted multiple of a unique periodic solution. This special solution can also be described from the more general perspective of the mixed feedback case (sign-changing <em>p</em>), thanks to its symmetry (antiperiodicity). The analogue of this conjecture for negative feedback, <span><math><mi>p</mi><mo>(</mo><mi>t</mi><mo>)</mo><mo>≤</mo><mn>0</mn></math></span>, was resolved by Lillo, and the mixed feedback analog was recently set as an open problem. In this paper, we resolve the case of mixed feedback, obtaining results in support of the conjecture of Buchanan and Lillo, underlining its link to the symmetry of the periodic solution. In particular, we obtain and describe the optimal estimates on the necessary delay for existence of periodic (more generally, nonvanishing) solutions, with respect to the period (oscillation speed). These apply to almost any first-order delay system, as we consider the general nonautonomous case, under minimal assumptions of measurability of the parameters. We furthermore discuss and elucidate the relations between the periodic and the nonautonomous case.</div></div>","PeriodicalId":55496,"journal":{"name":"Applied Mathematics and Computation","volume":"498 ","pages":"Article 129376"},"PeriodicalIF":3.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experience-driven learning and interactive rules under link weight adjustment promote cooperation in spatial prisoner's dilemma game 链接权重调整下的经验驱动学习和互动规则促进空间囚徒困境博弈中的合作

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-02-28 DOI: 10.1016/j.amc.2025.129381

Shounan Lu , Yang Wang

{"title":"Experience-driven learning and interactive rules under link weight adjustment promote cooperation in spatial prisoner's dilemma game","authors":"Shounan Lu , Yang Wang","doi":"10.1016/j.amc.2025.129381","DOIUrl":"10.1016/j.amc.2025.129381","url":null,"abstract":"<div><div>Drawing on social learning theory, which emphasizes the dual influence of direct and indirect experience on behavior, this study extends the Spatial Prisoner's Dilemma game framework through three key innovations. First, we develop a link weight adjustment mechanism that incorporates tolerance, a previously neglected factor. Second, we extend the interaction probability model by integrating both direct and indirect link weights. Third, we design a strategy update rule where behavioral adaptation depends on combined experience learning. Simulation results show that our approach significantly outperforms traditional models in promoting cooperation. In particular, we identify an inverse relationship between tolerance and cooperation levels, with reduced defection sensitivity effectively protecting cooperators from exploitation. Furthermore, indirect experiences prove more powerful than direct interactions in sustaining cooperation. Together, these mechanisms increase cooperators' payoffs and competitive advantage. Integrating both direct and indirect experiences into policy updates offers a more comprehensive approach to addressing complex social challenges, as it enables decision-makers to leverage both personal insights and collective wisdom for more effective solutions.</div></div>","PeriodicalId":55496,"journal":{"name":"Applied Mathematics and Computation","volume":"497 ","pages":"Article 129381"},"PeriodicalIF":3.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511599","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

Bounded consensus in second-order uncertain nonlinear multiagent systems: A distributed neural network control approach 二阶不确定非线性多智能体系统的有界一致：一种分布式神经网络控制方法

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-02-28 DOI: 10.1016/j.amc.2025.129369

Chaoyang Li , Shidong Zhai , Yuanshi Zheng

引用次数: 0

How predator harvesting affects prey-predator dynamics in deterministic and stochastic environments? 在确定性和随机环境中，捕食者的捕获如何影响捕食者-猎物动力学？

IF 3.5 2区数学

Applied Mathematics and Computation Pub Date : 2025-02-28 DOI: 10.1016/j.amc.2025.129380

Bapin Mondal , Sayan Mandal , Pankaj Kumar Tiwari , Ranjit Kumar Upadhyay

{"title":"How predator harvesting affects prey-predator dynamics in deterministic and stochastic environments?","authors":"Bapin Mondal , Sayan Mandal , Pankaj Kumar Tiwari , Ranjit Kumar Upadhyay","doi":"10.1016/j.amc.2025.129380","DOIUrl":"10.1016/j.amc.2025.129380","url":null,"abstract":"<div><div>This study investigates the dynamics of predator-prey interactions in both deterministic and stochastic environments, with a focus on the ecological implications of predator harvesting. Theoretical and numerical analyses explore local stability, bifurcations, and bionomic equilibria to identify sustainable harvesting strategies. Our findings reveal that increasing predator harvesting rates can induce up to four interior equilibrium points via saddle-node bifurcations, including catastrophic transitions that destabilize the system. At high harvesting rates, the predator-free equilibrium becomes globally stable, while low and intermediate rates result in bistability or tristability, allowing coexistence of prey and predator populations. For the stochastic model, we derive conditions for species persistence and extinction, using the confidence ellipse method to quantify threshold noise intensities that trigger critical transitions between stable states. At low noise levels, predator and prey populations fluctuate around stable equilibria, but higher noise intensities can drive shifts to alternate states or predator extinction. The key factors influencing system dynamics include the predator's intrinsic growth rate, alternative food sources, and harvesting intensity. Our analysis underscores the vulnerability of ecological systems to stochastic disturbances and emphasizes the importance of carefully managed harvesting practices. These findings contribute to the development of strategies that balance ecological stability with economic objectives, ensuring the long-term sustainability of predator-prey populations.</div></div>","PeriodicalId":55496,"journal":{"name":"Applied Mathematics and Computation","volume":"498 ","pages":"Article 129380"},"PeriodicalIF":3.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526704","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