Communications in Nonlinear Science and Numerical Simulation最新文献_第10页

Observer-based resilient PD-like scaled group consensus for uncertain multiagent systems under time-varying delays 时变时滞下不确定多智能体系统的基于观测器的弹性类pd伸缩群体共识

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-17 DOI: 10.1016/j.cnsns.2025.108846

Zhen Tang , Ziyang Zhen , Zhengen Zhao , Geert Deconinck

{"title":"Observer-based resilient PD-like scaled group consensus for uncertain multiagent systems under time-varying delays","authors":"Zhen Tang , Ziyang Zhen , Zhengen Zhao , Geert Deconinck","doi":"10.1016/j.cnsns.2025.108846","DOIUrl":"10.1016/j.cnsns.2025.108846","url":null,"abstract":"<div><div>This paper addresses the issue of observer-based resilient scaled group consensus control for uncertain nonlinear multiagent systems subject to delays and disturbances. First, a distributed observer is introduced for each uncertain agent, enabling precise estimation of both the state and disturbance, while tolerating variations in observer gain. Next, a resilient proportional-derivative-like scaled group consensus protocol is formulated, accounting for both the observer and communication delays. Notably, this protocol achieves scaled group consensus while enhancing performance. A new delay-product type Lyapunov-Krasovskii functional is then developed, incorporating terms for triple integrals and Bessel-Legendre vectors, unlike the traditional quadratic form. By applying the Bessel-Legendre inequality and the extended reciprocally convex matrix inequality, new sufficient conditions for scaled group consensus are derived, yielding reduced conservatism. Finally, numerical examples are provided to validate the theoretical findings.</div></div>","PeriodicalId":50658,"journal":{"name":"Communications in Nonlinear Science and Numerical Simulation","volume":"148 ","pages":"Article 108846"},"PeriodicalIF":3.4,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890517","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

Topology optimization of the two smallest p-Laplacian eigenvalues by a level set method 基于水平集方法的两个最小p-拉普拉斯特征值拓扑优化

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-17 DOI: 10.1016/j.cnsns.2025.108854

Jing Li , Meizhi Qian , Shengfeng Zhu

引用次数: 0

One-way coupled Eulerian–Lagrangian strategy for wave propagation and impact on coastal areas 波浪传播及其对沿海地区影响的单向耦合欧拉-拉格朗日策略

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-16 DOI: 10.1016/j.cnsns.2025.108845

Andrea Montanino , Miguel Masó Sotomayor , Alessandro Franci

{"title":"One-way coupled Eulerian–Lagrangian strategy for wave propagation and impact on coastal areas","authors":"Andrea Montanino , Miguel Masó Sotomayor , Alessandro Franci","doi":"10.1016/j.cnsns.2025.108845","DOIUrl":"10.1016/j.cnsns.2025.108845","url":null,"abstract":"<div><div>Coastal hazards have gained importance in recent years due to the increasing number of extreme phenomena induced by climate change. The numerical simulation of such events represents a considerable challenge, due to the high non-linearity of the problem, the broadness of the domain, and the diversity of the involved scales. Holistic three-dimensional simulations of the whole domain are typically too computationally demanding and may not be necessary for the wave propagation analysis, where reduced models based on shallow-water hypotheses can be employed. However, these simplified approaches fail when modeling the intricate impact phenomena that occur in coastal zones. To reduce the computational cost without losing accuracy, we propose a one-way coupled approach using a Shallow-Water Eulerian solver to model wave propagation in the far field, and a complete three-dimensional Navier–Stokes Lagrangian strategy to simulate the wave impacting the coastal areas. A computational interface is used to store the kinematic information during the far-field analysis and to transfer it as an inlet condition to the near-field solver. The accuracy, efficiency and robustness of the proposed approach are shown in both 2D and 3D by studying two experimental tests.</div></div>","PeriodicalId":50658,"journal":{"name":"Communications in Nonlinear Science and Numerical Simulation","volume":"147 ","pages":"Article 108845"},"PeriodicalIF":3.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843697","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

Nonlinear multi-point impacts of the bi-stable functional gradient magneto-electro-elastic plate: Interaction analysis and active control strategy based on bistable configuration 双稳态功能梯度磁电弹性板的非线性多点冲击：基于双稳态结构的相互作用分析与主动控制策略

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-16 DOI: 10.1016/j.cnsns.2025.108881

Lizhi Li , Yiru Ren , Lu Nie

{"title":"Nonlinear multi-point impacts of the bi-stable functional gradient magneto-electro-elastic plate: Interaction analysis and active control strategy based on bistable configuration","authors":"Lizhi Li , Yiru Ren , Lu Nie","doi":"10.1016/j.cnsns.2025.108881","DOIUrl":"10.1016/j.cnsns.2025.108881","url":null,"abstract":"<div><div>Revealing the coupling correlations between stiffness nonlinearity and magneto-electro-mechanical effect in multi-point impacts contributes significantly to the advancement of intelligent morphing structures. Multi-point impact responses and active control of bi-stable functional gradient magneto-electro-elastic (FG-MEE) plates are investigated, focusing on influence mechanism of the active control performance and the bi-stable characteristics. Based on the Reddy high-order shear plate theory model, the nonlinear geometric relationship considering the bi-stable configuration is established, and the multi-point impact model is extended. To achieve efficient structural design in multi-point impacts, the active control strategy in multi-physics fields is introduced. In the multi-physical field, the nonlinear dynamic model for multi-point impact involving the bi-stable functionally graded magneto-electro-elastic plate is established. The expanded two-step perturbation method is proposed to solve the bi-stable configuration driven by the magneto-electro-mechanical effect. To obtain the approximate solution for the multi-point impact of the bi-stable FG-MEE plate, the extended two-step perturbation method-Galerkin method is further developed to the higher-order form. Ultimately, coupling correlations between stiffness nonlinearity and magneto-electro-mechanical effect in the multi-point impacts are systematically revealed, and the active control performance is evaluated under the influence of multi-point impact.</div></div>","PeriodicalId":50658,"journal":{"name":"Communications in Nonlinear Science and Numerical Simulation","volume":"148 ","pages":"Article 108881"},"PeriodicalIF":3.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860385","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

Coincidence degree theory for higher order nonlinear fractional differential equations: Existence and uniqueness results 高阶非线性分数阶微分方程的重合度理论：存在唯一性结果

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-16 DOI: 10.1016/j.cnsns.2025.108847

Sami Baroudi, Abderrazak Kassidi, Ali El Mfadel, M’hamed Elomari

引用次数: 0

Multiscale modeling of wave propagation with exponential integration and GMsFEM 基于指数积分和GMsFEM的波传播多尺度模拟

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-15 DOI: 10.1016/j.cnsns.2025.108825

Wei Xie , Juan Galvis , Yin Yang , Yunqing Huang

引用次数: 0

Forecasting crude oil option prices with dynamic factors using integrated machine learning models 基于集成机器学习模型的动态因素原油期权价格预测

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-15 DOI: 10.1016/j.cnsns.2025.108879

Kexin Yu , Xin-Jiang He , Xiaoyang Han , Xin Luo , Sha Lin

{"title":"Forecasting crude oil option prices with dynamic factors using integrated machine learning models","authors":"Kexin Yu , Xin-Jiang He , Xiaoyang Han , Xin Luo , Sha Lin","doi":"10.1016/j.cnsns.2025.108879","DOIUrl":"10.1016/j.cnsns.2025.108879","url":null,"abstract":"<div><div>In this article, we develop a dynamic factor model utilizing the incremental principal component analysis (IPCA) method to identify the key factors influencing crude oil option prices. We employ eight popular machine learning algorithms, i.e., LASSO, Support Vector Regression (SVR), Ridge Regression, Back Propagation (BP), Recurrent Neural Network (RNN), Long Short-Term Memory (LSTM), Gated Recurrent Unit (GRU), and Multi-Layer Perceptron (MLP), to forecast crude oil prices. Their performance is rigorously evaluated using four distinct error measurements alongside the model confidence set (MCS) and direction of change (DoC) tests. We further introduce an integrated machine learning model that combines the strengths of the top-performing algorithms through weighted averaging, enhancing both predictive accuracy and robustness. In addition, we also explore the interpretability of the factors influencing the precision of predictivity using the SHAP value, so that the contribution of these factors towards the prediction is clear. Our findings offer substantial potential for mitigating energy risks and improving market efficiency through refined price forecasting techniques.</div></div>","PeriodicalId":50658,"journal":{"name":"Communications in Nonlinear Science and Numerical Simulation","volume":"147 ","pages":"Article 108879"},"PeriodicalIF":3.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847563","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

Numerical modeling of stress state-dependent anisotropic fracture behavior for WE43 alloy WE43合金应力状态相关各向异性断裂行为数值模拟

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-15 DOI: 10.1016/j.cnsns.2025.108872

Pengfei Wu , Yanshan Lou , Qiang Chen

{"title":"Numerical modeling of stress state-dependent anisotropic fracture behavior for WE43 alloy","authors":"Pengfei Wu , Yanshan Lou , Qiang Chen","doi":"10.1016/j.cnsns.2025.108872","DOIUrl":"10.1016/j.cnsns.2025.108872","url":null,"abstract":"<div><div>Accurate prediction for fracture behavior plays an important role in metal forming process. The study aims to uncover and model the effect of anisotropy and stress state on the fracture behavior of WE43 alloy. The mechanical experiments along 0°, 45°, and 90° between the loading direction and rolling direction (RD, DD and TD) were carried out under tension, compression and shear stress states. It shows that the initial yield stress is with weak anisotropy and negligible tension-compression asymmetry, while the hardening behavior shows some anisotropy related to strain. The plastic ability along DD is preferred to that along RD and TD under uniaxial loading. The fracture behavior belongs to the ductile fracture with tension and shear mechanisms, which is dependent on the stress state and loading direction. An analytical anisotropic Drucker yield function is proposed to capture the evolving yield behavior with non-proportionality. The fracture-related variables from plane strain compression to plane strain tension along different loading directions are obtained with acceptable prediction accuracy by adopting the hybrid experimental-numerical method. A Drucker-DF2016 anisotropic fracture criterion is established based on the linear transformation tensor to characterize the coupling effect of anisotropy and stress state on the fracture behavior of WE43 alloy with an error of 0.054, which is smaller than the error (0.2908) of the Yld91-DF2014 anisotropic fracture criterion. The fracture location in numerical simulation is basically consistent with the fracture location in the experiment. This research provides an analytical yield function and anisotropic fracture model to be applied into the numerical modeling of the yield and fracture behaviors of metals.</div></div>","PeriodicalId":50658,"journal":{"name":"Communications in Nonlinear Science and Numerical Simulation","volume":"147 ","pages":"Article 108872"},"PeriodicalIF":3.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838488","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

Further results on distributed finite-time synchronization for fractional-order coupled neural networks 分数阶耦合神经网络分布式有限时间同步的进一步结果

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-15 DOI: 10.1016/j.cnsns.2025.108832

Bibo Zheng , Wei Dai , Zhanshan Wang

{"title":"Further results on distributed finite-time synchronization for fractional-order coupled neural networks","authors":"Bibo Zheng , Wei Dai , Zhanshan Wang","doi":"10.1016/j.cnsns.2025.108832","DOIUrl":"10.1016/j.cnsns.2025.108832","url":null,"abstract":"<div><div>Given that the Newton-Leibniz formula and chain rule are not applicable to fractional calculus, the results of finite-time synchronization for integer-order systems are difficult to directly extend to fractional-order ones. In view of this, this paper is devoted to the finite-time synchronization for fractional-order coupled neural networks via a developed approach. Firstly, with the help of Laplace transform, the properties of Mittag-Leffler function and proof by contradiction, a more generalized fractional-order nonlinear differential inequality involved with finite-time convergence is established. Besides, some previous results on finite-time stability or synchronization of fractional-order systems can be further extended by this inequality, which presents a new tool for research. Under this framework, two distributed finite-time control schemes are introduced, (1) a basic distributed finite-time control scheme relying on some global information; (2) an improved fractional-order adaptive distributed finite-time control scheme, which avoids the dependence of some global information. Then, the communication topology is extended by including the synchronized state as a <span><math><mrow><mo>(</mo><mi>N</mi><mo>+</mo><mn>1</mn><mo>)</mo></mrow></math></span>th node in the considered networks, which eliminates the restriction on original network topology connectivity. In the end, in order to verify the feasibility of the proposed method, a numerical example of fractional-order Chua’s circuit system is provided.</div></div>","PeriodicalId":50658,"journal":{"name":"Communications in Nonlinear Science and Numerical Simulation","volume":"147 ","pages":"Article 108832"},"PeriodicalIF":3.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838485","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

Conservative mixed Discontinuous Galerkin finite element method with full decoupling strategy for incompressible MHD problems 不可压缩MHD问题的完全解耦保守混合不连续Galerkin有限元法

IF 3.4 2区数学

Communications in Nonlinear Science and Numerical Simulation Pub Date : 2025-04-15 DOI: 10.1016/j.cnsns.2025.108842

Huayi Huang , Yunqing Huang , Qili Tang , Lina Yin

{"title":"Conservative mixed Discontinuous Galerkin finite element method with full decoupling strategy for incompressible MHD problems","authors":"Huayi Huang , Yunqing Huang , Qili Tang , Lina Yin","doi":"10.1016/j.cnsns.2025.108842","DOIUrl":"10.1016/j.cnsns.2025.108842","url":null,"abstract":"<div><div>In this research, we propose a mixed Discontinuous Galerkin (DG) finite element method (FEM) for the numerical solution of incompressible magnetohydrodynamics (MHD) problems, ensuring the divergence-free condition for the velocity field. Our proposed methodology is characterized by its energy stability. Subsequently, we construct a novel finite element discretization scheme, for which we establish the theoretical framework of energy stability. Furthermore, we incorporate a preconditioning strategy that facilitates the development of an alternative positive definite, fully decoupled linearization approach. A significant advantage of this scheme is its ability to circumvent the complexities associated with solving saddle point problems at each time step. We demonstrate the uniqueness and convergence of the solutions within this fully decoupled, block-structured linear system. This theoretical validation is complemented by a series of numerical experiments that substantiate the effectiveness and accuracy of our proposed method.</div></div>","PeriodicalId":50658,"journal":{"name":"Communications in Nonlinear Science and Numerical Simulation","volume":"147 ","pages":"Article 108842"},"PeriodicalIF":3.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847662","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