Simulation Modelling Practice and Theory最新文献

{"title":"Modelling and visualization behavior simulation in public open spaces based on MLP and SFM","authors":"Chunxia Yang,&nbsp;Mengxuan Liu,&nbsp;Zhaoxiang Fan","doi":"10.1016/j.simpat.2025.103076","DOIUrl":"10.1016/j.simpat.2025.103076","url":null,"abstract":"<div><div>This research is grounded in the analysis of real human activity data in public open spaces (POS) and investigates the utilization patterns of 45 spatial segments and 121 subspaces within Shanghai's waterfront public areas. Employing a multi-layer perceptron neural network model, we explore the mechanisms by which 30 space, environmental, and facility factors influence various activities, including sightseeing, leisure, and sports. These findings are then integrated into a behavior simulation visualization system. Following a fitting and adjustment process, we validate the effectiveness of this behavior simulation system. The research outcomes reveal the robust performance of the multi-layer perceptron in predicting pedestrian activity in public spaces. Translating numerical predictive models into dynamic systems of behavioral simulation driven by social force model (SFM), we observe a relative error (RE) range of 0.041–0.158, with minimal loss of fit. Finally, through practical case testing, we illustrate the application of this behavior simulation workflow. The primary objective of this research is to provide predictive and scientific foundations based on human behavioral requirements for the design and optimization of POS, supporting human-centric and refined design decisions for urban landscape space.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"140 ","pages":"Article 103076"},"PeriodicalIF":3.5,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Large-scale real-time evacuation modeling during urban floods: A coupled agent-based multi-model framework","authors":"Wei Lv ,&nbsp;Fangwei Deng ,&nbsp;Jinghui Wang ,&nbsp;Yefan Han ,&nbsp;Shuai Yang","doi":"10.1016/j.simpat.2025.103075","DOIUrl":"10.1016/j.simpat.2025.103075","url":null,"abstract":"<div><div>The escalating frequency of urban pluvial flooding disasters, attributed to climate change and rapid urbanization, has emerged as a formidable global challenge. Meanwhile, the task of large-scale real-time urban evacuation simulation research remains arduous and complex. In response, this paper presents a coupled agent-based multi-model framework (CABMF) that intertwines (1) an agent-based model capturing the decision-making attributes, (2) a transportation model delineating pedestrian and vehicular evacuation movements, and (3) a hydrodynamic model simulating catastrophic floodwater progression. Notably, this framework achieves pioneering real-time evacuation simulation concurrently with the impacts of flood disasters. Applying the CABMF to the evacuation simulation in a flood emergency of the 10-kilometer buffer zone along the Yangtze River and Han River within Wuhan city, along with scenario-based simulations, enables an examination of the influence of transportation modes, shelter arrangements, and flood-affected road networks on evacuation experimental results. Research findings suggest that optimizing the ratio of transportation modes, arranging vertical evacuation shelters, and restricting access to identified high-risk road links contribute to improved evacuation efficiency and reduced disaster risk. The proposed CABMF couples the impacts of flood uniquely and is anticipated to yield substantial insights for large-scale evacuation management in the context of flood disasters.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"140 ","pages":"Article 103075"},"PeriodicalIF":3.5,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transfer-Mamba: Selective state space models with spatio-temporal knowledge transfer for few-shot traffic prediction across cities","authors":"Shaokang Cheng,&nbsp;Shiru Qu,&nbsp;Junxi Zhang","doi":"10.1016/j.simpat.2025.103066","DOIUrl":"10.1016/j.simpat.2025.103066","url":null,"abstract":"<div><div>Spatio-temporal traffic forecasting significantly impacts the development of smart cities. Owing to uneven development levels and the substantial costs of data collection, many cities often encounter the challenge of limited data availability when undertaking traffic prediction tasks. This paper introduces Transfer-Mamba, a method that employs Spatio-temporal selective state space models with transfer learning for few-shot traffic prediction across multiple cities. Transfer-Mamba features a Spatio-temporal graph pre-training process, which incorporates an encoder–decoder architecture with a Mamba module and an adaptive graph convolutional network. This process enhances the feature representation and transferability of traffic data from multiple source cities by capturing Spatio-temporal correlations. To distinguish unique traffic patterns and data distributions in source cities, an unsupervised learning algorithm groups similar traffic characteristics during the Spatio-temporal knowledge clustering phase. These clustered patterns are then retrieved through a Spatio-temporal knowledge querying process, which extracts traffic meta-knowledge to guide the few-shot prediction phase for the target city. Extensive experiments conducted on four real-world traffic datasets demonstrate that Transfer-Mamba outperforms the existing mainstream baselines, which provides valuable insight for optimizing road traffic management.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"140 ","pages":"Article 103066"},"PeriodicalIF":3.5,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discrete element modelling of water diffusion and softening characteristics in rocks","authors":"Kang Bian ,&nbsp;Yanan Chen ,&nbsp;Xuecheng Peng ,&nbsp;Qingrong Xiong","doi":"10.1016/j.simpat.2024.103065","DOIUrl":"10.1016/j.simpat.2024.103065","url":null,"abstract":"<div><div>The water softening effect is a critical factor that can cause or exacerbate large deformation phenomena or even instability in rock engineering. In this study, a meso water diffusion and softening model is proposed based on the discrete element method, the theory of saturated-unsaturated seepage and damage theory, which can be used to characterize the moisture diffusion process between rock pores quantitatively, as well as the mechanical behaviour of rock particles undergoing parameter deterioration subjected to a water-induced softening effect. In addition, by comparing the simulated values with the results of mercury intrusion, water absorption and uniaxial compression tests, the rationality of the proposed model has been validated. Furthermore, the relationships between the saturation coefficients and the mechanical parameters of rock samples are researched, and the moisture distribution characteristics of rock samples and their impacts on the meso mechanical parameters under water absorption, evaporation and closed boundary conditions are studied, as well as the evolution of the number of microcracks in rock samples during uniaxial compression tests. The research results indicate that the strength and stiffness parameters of the particle elements exhibit non-linear degradation with increasing saturation coefficient. With the same saturation coefficient, the degradation degree of the uniaxial compressive strength and elastic modulus of the sample during the evaporation process is usually greater than that of the sample during the saturation process. Compared with that in the low-saturation samples, the number of cracks in the high-saturation samples significantly increased under water absorption conditions. In contrast, the number of cracks in the sample does not change significantly with decreasing saturation under evaporation conditions. The proposed model provides a new approach for studying the water-softening effect in rocks using the discrete element method.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"140 ","pages":"Article 103065"},"PeriodicalIF":3.5,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Stochastic Energy-Efficient Robust Simulation-Based Truck Dispatching Optimization for Simultaneous GHG Mitigation and Operational Excellence in Open-Pit Mines","authors":"Mohammadreza Kazemi Ashtiani ,&nbsp;Ali Moradi Afrapoli ,&nbsp;John Doucette ,&nbsp;Hooman Askari-Nasab","doi":"10.1016/j.simpat.2024.103026","DOIUrl":"10.1016/j.simpat.2024.103026","url":null,"abstract":"<div><div>Almost all currently active large open-pit mines across the globe heavily rely on fleet of shovels and haul trucks for material handling. This material handling system has a significant contribution not only to the production cost of the mine (+50%), but also to its energy consumption (+41%) and greenhouse gas (GHG) emissions (+37%). However, traditionally, operation management in general and truck dispatching, in particular, focused primarily on production targets and operational efficiency, neglecting environmental considerations in open-pit mines. Nowadays, growing awareness of climate change and responsible resource extraction has shifted, however, the focus towards sustainable practices throughout the mining industry, open-pit mining not excluded. The significant contribution of this study lies in the development of an integrated simulation and optimization framework that simultaneously accounts for anthropogenic GHG emissions resulting from energy (fuel) consumption and enhances the operational efficiency of the material handling system, thus yielding direct economic and environmental benefits. The paper fulfills its goals with the aim of simultaneous achievement of four interdependent objectives: minimizing the deviations from target production rates set by strategic plans, minimizing the shovel idle time, minimizing the truck wait time, and minimizing the truck fuel consumption. The performance and the robustness of the proposed framework has been evaluated in a case study at Gol-E-Gohar mine in Iran, demonstrating a successful achievement of up to 6% reduction in fuel consumption per tonne of production leading to a significant overall decrease of up to 20,000 liters in fuel consumption, equivalent to 61,000 carbon dioxide (CO2) emissions, in a 10-day operation with 12 hours of operation per day.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"138 ","pages":"Article 103026"},"PeriodicalIF":3.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Parallelization strategies for high-performance and energy-efficient epidemic spread simulations","authors":"Daniel Cagigas-Muñiz ,&nbsp;Fernando Diaz-del-Rio ,&nbsp;Jose Luis Sevillano-Ramos ,&nbsp;José-Luis Guisado-Lizar","doi":"10.1016/j.simpat.2024.103059","DOIUrl":"10.1016/j.simpat.2024.103059","url":null,"abstract":"<div><div>Simulation analysis of epidemic disease spread is crucial for a proper social and governmental response. Certain susceptible–infected–recovered (SIR) models based on cellular automata (CA) have proven to be effective tools for this purpose. Despite the growing interest in these simulation models, few studies have addressed computational efficiency. Many models are not parallelized and, as a result, are computationally inefficient. Moreover, computational efficiency is often solely associated with runtime, with limited attention given to energy consumption and energy-efficient software implementations.</div><div>This paper presents various parallel implementations of a successful Covid-19 cellular automaton SIR model on multiprocessors and Graphics Processing Units (GPUs), significantly improving the performance of existing codes while substantially reducing energy consumption. The performance analysis of these parallel implementations demonstrates that simulations can be reduced from hours to under a second, with energy consumption reduced by more than three orders of magnitude. Additionally, the results reveal that in cases where multiple parallel multiprocessor alternatives are available, there is not always a direct correlation between the shortest execution time and the lowest energy consumption in CA simulations.</div><div>This work aims to support practitioners interested in implementing or utilizing parallel, energy-efficient SIR model simulations for future epidemic outbreaks, green computing initiatives, and efficient cellular automata simulations in general.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"140 ","pages":"Article 103059"},"PeriodicalIF":3.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A discrete-event multi-agent simulation framework supporting well-to-wheel analysis for greening commercial maritime ports","authors":"Chiara Fiori,&nbsp;Lucas Joel Cisternas,&nbsp;Stefano de Luca","doi":"10.1016/j.simpat.2024.103061","DOIUrl":"10.1016/j.simpat.2024.103061","url":null,"abstract":"<div><div>This paper develops a discrete-event multi-agent simulation model that may support robust and realistic well-to-wheel analysis to assess energy consumption and greenhouse gas emissions of greener technologies applied to container terminal activities. To this end, a discrete-event simulation multi-agent model was specifically developed and validated with real data for the port of Salerno (southern Italy), and a well-to-wheel analysis was carried out by comparing different scenarios with an increasing level of port electrification solutions. A comparison is proposed in terms of consumption and emissions between conventionally fueled and “green” vehicles, including cold ironing technology. The proposed modeling framework makes it possible to simulate highly complex logistics systems in which the environmental and energetic performance of the handling equipment may significantly differ and be significantly affected by human factors and external factors. Our results show that the greener scenario allows higher emissions reduction based on the energy sources used to produce electricity.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"140 ","pages":"Article 103061"},"PeriodicalIF":3.5,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical simulation of hydraulic fracture extension patterns at interfaces of coal-measure rock strata and a new theoretical prediction model","authors":"Junqiang Ma ,&nbsp;Xuehua Li ,&nbsp;Yinghu Li ,&nbsp;Xuanhui Wang ,&nbsp;Qiangling Yao ,&nbsp;Sen Yang","doi":"10.1016/j.simpat.2024.103063","DOIUrl":"10.1016/j.simpat.2024.103063","url":null,"abstract":"<div><div>Coal-measure gas (CMG), a unique form of unconventional natural gas located within coal seams and surrounding rock layers, represents a potential avenue for enhancing energy consumption patterns while mitigating carbon emissions. The geological structure of CMG reservoirs exhibits pronounced variability in layer strength and contains vertical discontinuities at lithological boundaries. These boundaries, shaped by sedimentation and tectonic forces, possess varying adherence strengths and inclinations, influencing the behavior of hydraulic fracturing fluids. Upon reaching such interfaces, fracturing fluids might either halt or propagate along them, thereby affecting the vertical expansion of hydraulic fractures. In this study, nine modes of hydraulic fracture extension at the interface of coal-measure rock strata were obtained by simulation using ABAQUS embedded in a 0-thickness Cohesive element.This study highlights how the disparity between the interface bond strength and adjacent rock mass primarily dictates fracture propagation direction under low vertical stress difference coefficient (<em>k</em>). A minimal disparity facilitates vertical fracture continuation through the interface. Conversely, with increasing <em>k</em> values, the influence of interface strength on fracture direction diminishes. Additionally, lower interface dip angles <em>β</em> correlate with heightened vertical stresses, promoting fracture vertical propagation. Furthermore, it fully considers the combined effect of tension and shear in the process of hydraulic fracture extension, and establishes a prediction model for the extension trajectory of hydraulic fracture at the interface of coal-measure rock strata based on the theory of maximum energy release rate and the mixed fracture energy criterion. This research offers novel insights into the mechanisms governing hydraulic fracture expansion at coal-measure rock strata interfaces and the critical factors influencing cross-interface propagation.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"140 ","pages":"Article 103063"},"PeriodicalIF":3.5,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A mixed crowd movement model incorporating chasing behavior","authors":"Hang Yu,&nbsp;Xintong Li,&nbsp;Weiguo Song,&nbsp;Jianlin Li,&nbsp;Xuehua Song,&nbsp;Jun Zhang","doi":"10.1016/j.simpat.2024.103044","DOIUrl":"10.1016/j.simpat.2024.103044","url":null,"abstract":"<div><div>In recent years, there has been a growing focus on the study of interactive movements within mixed crowds in the field of pedestrian evacuation. This study examines a specific type of interaction within mixed crowd: Group A chases Group B, while Group B needs to evade Group A and complete an evacuation, such as in situations involving attackers and pedestrians during a sudden violent incident. To model these complex movements, a velocity-based model incorporating panic propagation is developed. In this model, pedestrians adjust the magnitude and direction of their velocity by taking into account three key factors: avoidance of the attacker, movement toward the exit, and herd mentality. After a detailed introduction of the model, we first simulated and analyzed the parameters in the model to investigate the impact of various factors on the number of casualties and evacuation time. Subsequently, collective behavior from nature, experimental data, and specific crowd movement data are utilized to compare simulation results and validate the accuracy of the model. Finally, through simulations of single-exit and dual-exit bottleneck scenarios, a comparison of casualties revealed that placing exits at the corners of walls in building designs is more conducive to pedestrian evacuation.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"138 ","pages":"Article 103044"},"PeriodicalIF":3.5,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quality matters: A comprehensive comparative study of edge computing simulators","authors":"Charafeddine Mechalikh ,&nbsp;Abd El Heq Silem ,&nbsp;Zahra Safavifar ,&nbsp;Fatemeh Golpayegani","doi":"10.1016/j.simpat.2024.103042","DOIUrl":"10.1016/j.simpat.2024.103042","url":null,"abstract":"<div><div>Edge computing, by pushing resources closer to the network’s edge, is revolutionizing data processing, enabling real-time analysis and localized decision-making on resource-constrained devices. However, designing and validating innovative solutions within this dynamic environment presents significant challenges.</div><div>While numerous edge simulators exist, their shortcomings often restrict researchers’ ability to address their research questions. Many of them serve specific use cases (e.g., small scale scenarios, static application placement, etc.), lacking the breadth and flexibility needed for diverse research requirements. Furthermore, the lack of benchmarking studies complicates the process of selecting the right simulators for a specific need.</div><div>This study addresses these limitations by presenting a comprehensive evaluation of 24 edge computing simulators, filling a critical gap in the literature. We propose a robust methodology that assesses the simulators based on functionality, maintenance, scalability, reliability, efficiency, and usability. Our study provides clear classifications and comparisons of the simulators to assist researchers in selecting the most suitable one for their edge computing scenarios. Additionally, we identify and discuss opportunities and challenges for advancing the current state of the art in edge simulation, highlighting potential areas for future research.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"138 ","pages":"Article 103042"},"PeriodicalIF":3.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}