Physica D: Nonlinear Phenomena最新文献_第8页

Evolution of shielding cloud under oscillatory external forcing in strongly coupled ultracold neutral plasma 强耦合超冷中性等离子体中振荡外力作用下屏蔽云的演变

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-23 DOI: 10.1016/j.physd.2024.134326

Mamta Yadav, Aman Singh Katariya, Animesh Sharma, Amita Das

引用次数: 0

Revealing the sentiment propagation under the conscious emotional contagion mechanism in the social media ecosystem: For public opinion management 揭示社交媒体生态系统中有意识情绪传染机制下的情绪传播：用于舆论管理

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-18 DOI: 10.1016/j.physd.2024.134327

Fulian Yin , Xinyi Jiang , Jinxia Wang , Yan Guo , Yuewei Wu , Jianhong Wu

{"title":"Revealing the sentiment propagation under the conscious emotional contagion mechanism in the social media ecosystem: For public opinion management","authors":"Fulian Yin , Xinyi Jiang , Jinxia Wang , Yan Guo , Yuewei Wu , Jianhong Wu","doi":"10.1016/j.physd.2024.134327","DOIUrl":"10.1016/j.physd.2024.134327","url":null,"abstract":"<div><p>In public opinion events, the breeding of negative sentiment has a serious negative impact on the network environment and even offline lives. Hence, establishing an emotion-based propagation dynamic model to catch the sentiment development patterns is essential for helping public opinion management. We propose an E-SLFI (Emotion-driven Susceptible-Latent-Forwarding-Immune) model, which describes the dynamics of the sentiment propagation of ternary polarities under the promoting effect of the conscious emotional contagion mechanism. An empirical case composed of 16,354 pieces of forwarding information and two phases verifies the effectiveness of the proposed sentiment propagation dynamic model, due to the fitting optimization indicator MAPE equals 0.0942 % and 0.0066 % respectively. Further, we simulate the model and implement sensitivity analysis of the important parameters of the model. Combining the results of experiments, we find that enhancing the emotional consensus of recipients and inducers can decide the main sentiment in the system, and anti-emotional consensus can improve the existence of weak sentiments. Our work here is conducive to designing online public sentiment guidance strategies to manage public opinion and calming the network atmosphere to a certain extent.</p></div>","PeriodicalId":20050,"journal":{"name":"Physica D: Nonlinear Phenomena","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Well-posedness and decay for a nonlinear propagation wave model in atmospheric flows 大气流动中非线性传播波模型的拟合与衰减

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-16 DOI: 10.1016/j.physd.2024.134323

Diego Alonso-Orán , Rafael Granero-Belinchón

引用次数: 0

On the comparison between phenomenological and kinetic theories of gas mixtures with applications to flocking 气体混合物现象学和动力学理论的比较及在植绒中的应用

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-13 DOI: 10.1016/j.physd.2024.134321

Gi-Chan Bae , Seung-Yeal Ha , Gyuyoung Hwang , Tommaso Ruggeri

引用次数: 0

Approximate solutions for the Vlasov–Poisson system with boundary layers 有边界层的 Vlasov-Poisson 系统的近似解

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-13 DOI: 10.1016/j.physd.2024.134320

Chang-Yeol Jung , Bongsuk Kwon , Masahiro Suzuki , Masahiro Takayama

引用次数: 0

Dynamics of liquid bridges between patterned surfaces 图案表面之间的液桥动力学

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-12 DOI: 10.1016/j.physd.2024.134322

Margarida S. Rodrigues , Rodrigo C.V. Coelho , Paulo I.C. Teixeira

{"title":"Dynamics of liquid bridges between patterned surfaces","authors":"Margarida S. Rodrigues , Rodrigo C.V. Coelho , Paulo I.C. Teixeira","doi":"10.1016/j.physd.2024.134322","DOIUrl":"10.1016/j.physd.2024.134322","url":null,"abstract":"<div><p>We have simulated the motion of a single vertical, two-dimensional liquid bridge spanning the gap between two flat, horizontal solid substrates consisting of alternating hydrophilic and hydrophobic stripes, using a multicomponent pseudopotential lattice Boltzmann method. This extends our earlier work where the substrates were uniformly hydrophilic or hydrophobic. In steady-state conditions, we calculate the following, as functions of pattern wavelength: (i) the velocity fields of moving bridges, in particular their (time-averaged) terminal velocities; (ii) the deformation of moving bridges, as measured by the deviation of bridge contact angles from their equilibrium values; (iii) the minimum applied force that breaks a moving bridge. In addition, we found that a bridge moving between patterned substrates cannot be mapped onto a bridge moving between uniform substrates endowed with some effective contact angle, even in the limit of very small pattern wavelength compared to bridge width.</p></div>","PeriodicalId":20050,"journal":{"name":"Physica D: Nonlinear Phenomena","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0167278924002732/pdfft?md5=f118fd77314ddf0d2d7214a4b8122af4&pid=1-s2.0-S0167278924002732-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142002377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Key motifs searching in complex dynamical systems 复杂动力系统中的关键图案搜索

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-12 DOI: 10.1016/j.physd.2024.134318

Qitong Hu , Xiao-Dong Zhang

{"title":"Key motifs searching in complex dynamical systems","authors":"Qitong Hu , Xiao-Dong Zhang","doi":"10.1016/j.physd.2024.134318","DOIUrl":"10.1016/j.physd.2024.134318","url":null,"abstract":"<div><p>Key network motifs searching in complex networks is one of the crucial aspects of network analysis. There has been a series of insightful findings and valuable applications for various scenarios through the analysis of network structures. However, in dynamic systems, slight changes in the choice of dynamic equations and parameters can alter the significance of motifs. The known methods are insufficient to address this issue effectively. In this paper, we introduce a concept of perturbation energy based on the system’s Jacobian matrix, and define motif centrality for dynamic systems by seamlessly integrating network topology with dynamic equations. Through simulations, we observe that the key motifs obtained by the proposed energy method present better effective and accurate than them by integrating network topology methods, without significantly increasing algorithm complexity. The finding of key motifs can be used to apply for system control, such as formulating containment policies for the spread of epidemics and protecting fragile ecosystems. Additionally, it makes substantial contribution to a deeper understanding of concepts in physics, such as signal propagation and system’s stability.</p></div>","PeriodicalId":20050,"journal":{"name":"Physica D: Nonlinear Phenomena","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 eigenvalue problem for self-similar patterns in Hele-Shaw flows 赫勒-肖流中自相似模式的特征值问题

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-10 DOI: 10.1016/j.physd.2024.134319

Wang Xiao , Lingyu Feng , Fang Yang , Kai Liu , Meng Zhao

{"title":"An eigenvalue problem for self-similar patterns in Hele-Shaw flows","authors":"Wang Xiao , Lingyu Feng , Fang Yang , Kai Liu , Meng Zhao","doi":"10.1016/j.physd.2024.134319","DOIUrl":"10.1016/j.physd.2024.134319","url":null,"abstract":"<div><p>Hele-Shaw problems are prototypes to study the interface dynamics. Linear theory suggests the existence of self-similar patterns in a Hele-Shaw flow. That is, with a specific injection flux the interface shape remains unchanged while its size increases. In this paper, we explore the existence of self-similar patterns in the nonlinear regime and develop a nonlinear theory characterizing their fundamental features. Using a boundary integral formulation, we pose the question of self-similarity as a generalized nonlinear eigenvalue problem, involving two nonlinear integral operators. The nonlinear flux constant <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>f</mi></mrow></msub></math></span> is the eigenvalue and the corresponding self-similar pattern <span><math><mover><mrow><mi>x</mi></mrow><mrow><mo>̃</mo></mrow></mover></math></span> is the eigenvector. We develop a quasi-Newton method to solve the problem and show the existence of nonlinear shapes with <span><math><mi>k</mi></math></span>-fold dominated symmetries. Nonlinear results are compared with the established linear theory, demonstrating a divergence between the two due to non-linear effects absent in the linear stability analysis. Further, we investigate how sensitive the shape of the interface is to the viscosity. Additionally, we conduct numerous numerical experiments using a wide range of initial guesses and initial flux constants. Through these experiments, one is able to obtain a diagram of self-similar shapes and the corresponding flux. It could be used to verify possible self-similar shapes with a proper initial guess and initial flux constant. Our results go beyond the predictions of linear theory and establish a bridge between the linear theory and simulations.</p></div>","PeriodicalId":20050,"journal":{"name":"Physica D: Nonlinear Phenomena","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Behavior-induced phase transitions with far from equilibrium patterning in a SIS epidemic model: Global vs non-local feedback SIS 流行病模型中远离平衡模式的行为诱导相变：全局反馈与非局部反馈

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-09 DOI: 10.1016/j.physd.2024.134316

Malay Banerjee , Vitaly Volpert , Piero Manfredi , Alberto d’Onofrio

{"title":"Behavior-induced phase transitions with far from equilibrium patterning in a SIS epidemic model: Global vs non-local feedback","authors":"Malay Banerjee , Vitaly Volpert , Piero Manfredi , Alberto d’Onofrio","doi":"10.1016/j.physd.2024.134316","DOIUrl":"10.1016/j.physd.2024.134316","url":null,"abstract":"<div><p>Here, we explore the phase transitions triggered by the implementation of social distancing in a basic spatiotemporal model of a qualitative SIS-type infectious disease. We consider human decisions made based on spatiotemporal information regarding the disease spread. This information can be either local, nonlocal with a finite range, or global in scope.</p><p>We show that nonlocal and global feedbacks, while resulting in the same spatially homogeneous equilibria, lead to a dynamic behavior that is fundamentally distinct from what is observed when decisions are made based on local information.</p><p>Various phenomena arise due to the nonlocal nature of the feedback: (i) Instabilization of Otherwise Stable Homogeneous Equilibria; (ii) Nucleation/Invasion Phenomena; (iii) Onset of Standard and Generalized Traveling Waves, which can incur in wave-pinning; iv) in case of Global Information Feedback, onset of locally stable Far From Equilibrium Patterns that coexist with a locally stable disease-elimination equilibrium. Thus, the nonlocal nature of the human behavior-related feedback introduces a rich array of dynamic behaviors and patterns in the system.</p></div>","PeriodicalId":20050,"journal":{"name":"Physica D: Nonlinear Phenomena","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0167278924002677/pdfft?md5=71725576a842fabbea0b955187958812&pid=1-s2.0-S0167278924002677-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

On pressureless Euler equation with external force 关于有外力的无压欧拉方程

IF 2.7 3区数学

Physica D: Nonlinear Phenomena Pub Date : 2024-08-08 DOI: 10.1016/j.physd.2024.134317

B.G. Konopelchenko , G. Ortenzi

引用次数: 0