Physica A: Statistical Mechanics and its Applications最新文献

Traffic dynamics in cooperative adaptive cruise control (CACC) vehicle platoons: Analyzing congestion and merge behaviors 协同自适应巡航控制（CACC）车辆队列中的交通动力学：拥堵与合并行为分析

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-27 DOI: 10.1016/j.physa.2025.130724

Kumlachew Yeneneh, Menelik Walle, Tatek Mamo

{"title":"Traffic dynamics in cooperative adaptive cruise control (CACC) vehicle platoons: Analyzing congestion and merge behaviors","authors":"Kumlachew Yeneneh, Menelik Walle, Tatek Mamo","doi":"10.1016/j.physa.2025.130724","DOIUrl":"10.1016/j.physa.2025.130724","url":null,"abstract":"<div><div>This study investigates the platoon dynamics of Cooperative Adaptive Cruise Control (CACC)-equipped vehicles in mixed traffic environments, focusing on speed reduction, time-headway variations, and their effects on platoon stability. Simulations were conducted using aggressive, nominal, and cautious driver behavior models across mixed vehicle types, including trucks and small vehicles, with varying CACC ratios (20–80 %). Key performance indicators, such as time-headway, traffic density, and flow rate, were evaluated to examine the impact of CACC ratios on vehicular interaction during speed transitions, specifically from 120 kph to 100 kph and subsequent acceleration. Results demonstrated that higher CACC ratios facilitated smoother speed transitions and greater stability within the platoon. Additionally, position-based speed adjustments reduced traffic flow variability, particularly at high CACC ratios. Unlike prior studies, this research integrates a communication-based CACC control model, addressing lane-changing behaviors, vehicle communication, and realistic modeling of human-driven dynamics. The study also evaluates sliding mode control under mixed-traffic scenarios, emphasizing novel methodologies that address real-world constraints such as vehicle safety and physical limitations. These insights contribute to optimizing CACC configurations in mixed-traffic platoons, supporting enhanced cooperative driving strategies for congestion management and highway merging efficiency.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"673 ","pages":"Article 130724"},"PeriodicalIF":2.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupled oscillator model of a trapped Fermi gas at the BEC–BCS crossover 在bc - bcs交叉处捕获费米气体的耦合振荡器模型

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-27 DOI: 10.1016/j.physa.2025.130683

S.V. Andreev

引用次数: 0

A link prediction algorithm based on support vector machine 一种基于支持向量机的链路预测算法

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-27 DOI: 10.1016/j.physa.2025.130674

Yinzuo Zhou, Weilun Chen, Huangrong Zou

引用次数: 0

Effective one-body interactions due to the presence of a liquid–vapor interface 由于存在液-气界面而产生的有效的一体相互作用

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-27 DOI: 10.1016/j.physa.2025.130686

Melih Gül, Roland Roth

引用次数: 0

Pattern dynamics of a vegetation-water model with saturated effect and diffusion feedback 具有饱和效应和扩散反馈的植被-水模型模式动力学

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-26 DOI: 10.1016/j.physa.2025.130676

Huimin Bai , Yu-Xuan Fan , Li Li

{"title":"Pattern dynamics of a vegetation-water model with saturated effect and diffusion feedback","authors":"Huimin Bai , Yu-Xuan Fan , Li Li","doi":"10.1016/j.physa.2025.130676","DOIUrl":"10.1016/j.physa.2025.130676","url":null,"abstract":"<div><div>Desertification represents one of the most pressing ecological challenges globally, where vegetation patterns serve as critical indicators of ecosystem resilience and early-warning signatures of ecological degradation. Soil water diffusive feedbacks and saturation water uptake by vegetation are important mechanisms for vegetation-water interactions in arid and semi-arid environments. In this paper, a Klausmeier-type vegetation-water model is investigated to study the mechanism of vegetation pattern formation by incorporating a saturated water absorption term and soil water diffusion feedback. We derive amplitude equations near the Turing bifurcation point, revealing selection criteria and stability conditions for vegetation patterns. Our findings reveal that the saturated water absorption effect induces pattern phase transitions, the feedback mechanism of soil water diffusion accelerates desertification, and precipitation gradients induce the emergence of a bistable coexistence phenomenon. These results provide theoretical insights into the dynamics of vegetation patterns and offer guidance for ecosystem management and desertification control.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"673 ","pages":"Article 130676"},"PeriodicalIF":2.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Subgraphs and motifs in a dynamic airline network 动态航线网络中的子图和母题

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-26 DOI: 10.1016/j.physa.2025.130660

Marius Agasse-Duval, Steve Lawford

引用次数: 0

Effects of aggregate size, shape, orientation, and volume fraction on the interfacial layers of concrete 集料尺寸、形状、取向和体积分数对混凝土界面层的影响

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-26 DOI: 10.1016/j.physa.2025.130721

Xuqian Liu , Hui Li

{"title":"Effects of aggregate size, shape, orientation, and volume fraction on the interfacial layers of concrete","authors":"Xuqian Liu , Hui Li","doi":"10.1016/j.physa.2025.130721","DOIUrl":"10.1016/j.physa.2025.130721","url":null,"abstract":"<div><div>Concrete can be considered a three-dimensional two-phase composite with aggregate particles and cement matrix at the mesoscopic scale. The wall effect is often observed in concrete and leads to interfacial layers near the boundaries of concrete. The features of aggregates significantly impact the interfacial layers and then affect the macroscopic properties of concrete. Different kinds of non-spherical particles are employed as aggregate particles in this paper to explore the effects of aggregate features on the interfacial layers. Concrete structures are generated based on the constructions and contact detection algorithms of particles. Using the particle packing method and the section analysis method, three parameters for the solid phase (i.e., the volume fraction <em>V</em><sub><em>V</em></sub>, the speciﬁc surface area <em>S</em><sub><em>V</em></sub>, and the mean free spacing <em>λ</em>) can be obtained to characterize the change in the properties of the interfacial layer. Finally, the eﬀects of the aggregate features, including aggregate size, shape, orientation, and volume fraction, on the interfacial layers of concretes are studied. These results are meaningful for the properties and design of the composites.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"673 ","pages":"Article 130721"},"PeriodicalIF":2.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","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 firefighter movement in single-file experiment at different visibility levels 不同能见度下消防员单纵队运动的动力学分析

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-26 DOI: 10.1016/j.physa.2025.130716

Yixi Tao , Hang Yu , Weiguo Song , Xuehua Song , Jun Zhang

{"title":"Dynamic analysis of firefighter movement in single-file experiment at different visibility levels","authors":"Yixi Tao , Hang Yu , Weiguo Song , Xuehua Song , Jun Zhang","doi":"10.1016/j.physa.2025.130716","DOIUrl":"10.1016/j.physa.2025.130716","url":null,"abstract":"<div><div>Firefighter casualties frequently occur in low-visibility environments, such as fire scenes filled with smoke. To study the influence of visibility on the movement characteristics of firefighters' longitudinal movement, we conducted a single-file experiment under four visibility conditions. The study found that under different visibility conditions, firefighters exhibited four types of movement behaviors, including independent movement, assisting movement, exploring movement, and connecting movement, leading to distinct movement characteristics. Under invisible conditions, independent movement behavior was no longer observed. At high densities (N > 20), connecting movement accounted for more than 60 %. When Light transmittance (LT) = 100 %, 0.2 %, and 0.1 %, the influence of visibility on the movement characteristics of firefighters, such as velocity and headway-velocity relationship, was largely consistent with that of pedestrians. However, influenced by daily training requirements and rescue experience, firefighters exhibited more active body movements in dark environments (LT = 0 %). This behavioral movement significantly weakened the stop-go wave phenomenon, resulting in smaller lateral sway amplitudes that mitigated the adverse effects of density on movement. Furthermore, the adaptation time was notably shorter, with a critical headway of only 0.88 m. This study represents an initial attempt to explore the single-file movement characteristics of firefighters. The empirical data provided can serve as a foundation for modeling and further guide training and rescue missions for firefighters in low-visibility fire environments.</div></div>","PeriodicalId":20152,"journal":{"name":"Physica A: Statistical Mechanics and its Applications","volume":"673 ","pages":"Article 130716"},"PeriodicalIF":2.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regional emission dynamics in the phases of the EU Emissions Trading System 欧盟排放交易体系各阶段的区域排放动态

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-26 DOI: 10.1016/j.physa.2025.130680

Marco Dueñas , Antoine Mandel

引用次数: 0

Light attention-based neural networks for traffic flow prediction 基于轻注意力的交通流预测神经网络

IF 2.8 3区物理与天体物理

Physica A: Statistical Mechanics and its Applications Pub Date : 2025-05-24 DOI: 10.1016/j.physa.2025.130665

Yong Li , Jiajun Wang , Liujiang Kang

引用次数: 0