Simulation Modelling Practice and Theory最新文献_第10页

Assignment-simulation model for forklifts in a distribution center with aisle constraints 具有通道约束条件的配送中心叉车分配模拟模型

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-02-06 DOI: 10.1016/j.simpat.2024.102902

Mauricio Becerra-Fernandez , Olga R. Romero , Johanna Trujillo-Diaz , Milton M. Herrera

{"title":"Assignment-simulation model for forklifts in a distribution center with aisle constraints","authors":"Mauricio Becerra-Fernandez , Olga R. Romero , Johanna Trujillo-Diaz , Milton M. Herrera","doi":"10.1016/j.simpat.2024.102902","DOIUrl":"10.1016/j.simpat.2024.102902","url":null,"abstract":"<div><p>This study proposes a simulation model for allocating counterbalanced forklifts in a logistics distribution center (LDC) with aisle constraints. Modeling the case study for a consumer goods firm, the performance measures of the logistics operation were calculated and certain experimental scenarios were purposed for decision-making regarding the number of forklifts and their productivity. The relevance of this research is validated by the gap in existing literature on enhancing forklift assignments in massive storage systems with restrictions. The simulation scenarios contribute toward standardizing logistics operations with similar characteristics, starting from the layout stage of an LDC. The designed simulation model demonstrates that the simulated allocation incorporates technical and human resources in warehouse operations. Utilizing discrete-event simulation (DES) as a framework, this study assesses various scenarios in an LDC with restrictions on the forklift. The hypothesis of the problem was analyzed, and the simulation model was used to characterize the system behavior under different scenarios and guide the decision-making processes impacting operational costs and client service levels. This research employs DES to address performance indicators and operational costs, serving as a methodological guide for resource allocation in logistics operations at distribution centers.</p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1569190X24000169/pdfft?md5=99d00dd4dbcf204d4bf0e03f7784de16&pid=1-s2.0-S1569190X24000169-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139885677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Latency-aware placement of vehicular metaverses using virtual network functions 利用虚拟网络功能进行延迟感知的车载气象站布局

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-02-03 DOI: 10.1016/j.simpat.2024.102899

Fatima A. AlKhoori, Latif U. Khan, Mohsen Guizani, Martin Takac

{"title":"Latency-aware placement of vehicular metaverses using virtual network functions","authors":"Fatima A. AlKhoori, Latif U. Khan, Mohsen Guizani, Martin Takac","doi":"10.1016/j.simpat.2024.102899","DOIUrl":"10.1016/j.simpat.2024.102899","url":null,"abstract":"<div><p>Recent unprecedented trend towards novel vehicular network applications (e.g., lane change assistance, collision avoidance, accident reporting, and infotainment) led to research activities towards the novel design of vehicular networks. Such a novel design can leverage metaverse architecture among various possible schemes. However, enabling the metaverse for a vehicular network requires careful placement of meta spaces (i.e., virtual network functions based on virtual machines running a virtual model of the actual network) at the network edge. Furthermore, virtual network functions will use additional entities (e.g., memory storage) to better implement meta spaces. Therefore, in this work, we consider the efficient placement of meta spaces at the network edge. We formulate a cost function that accounts for latency (i.e., meta space computing latency and transmission latency for meta spaces signaling). To minimize this cost, an optimization problem is formulated that uses three variables: (a) meta spaces (i.e., based on virtual machines) operating frequency, (b) meta space placement, and (c) wireless resource allocation. A decomposition-based solution is used to solve the formulated problem due to its difficult nature. Finally, numerical results are provided and the paper is concluded.</p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139677316","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}

引用次数: 0

Modeling and optimization of platooning behaviors in fixed-time signalized intersection entrance areas 固定时间信号灯交叉口入口区的排队行为建模与优化

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-01-27 DOI: 10.1016/j.simpat.2024.102900

Junjie Zhang , Haijian Li , Yongfeng Ma , Chenxiao Zhang , Lingqiao Qin , Na Chen

{"title":"Modeling and optimization of platooning behaviors in fixed-time signalized intersection entrance areas","authors":"Junjie Zhang , Haijian Li , Yongfeng Ma , Chenxiao Zhang , Lingqiao Qin , Na Chen","doi":"10.1016/j.simpat.2024.102900","DOIUrl":"10.1016/j.simpat.2024.102900","url":null,"abstract":"<div><p>Intelligent vehicles passing through intersections in platoons have the potential to reduce speed fluctuations and improve traffic efficiency. This paper centers on the cooperative optimization of platooning behavior in urban fixed-time signalized intersection scenarios. It delves into the spatial group distribution characteristics of platoons within an intersection entrance lane and employs modeling techniques to vividly portray and express group behaviors, including lane-changing and car-following, across various physical areas within a platoon. Based on real-world traffic data collected in Beijing, SUMO (Simulation of Urban Mobility) is used to build simulation scenarios in this research. Considering both low- and high-volume conditions, the influence of different platoon size combinations on entrance lane traffic efficiency improvement is explored by adjusting the platoon size to determine an ideal vehicle group organization form under a given fixed signal timing. Experimental results show that the optimal platoon sizes and crossing sequences are affected by traffic volume and the number of lanes. For example, when the volume of a single lane in the east entrance straight direction is large (500 or 600 pcu/h/lane), the observed optimal platoon size is 7 to 9 pcu/p (pcu/platoon). These findings indicate that at fixed-time signalized intersections, there exists a reasonable platoon size that optimizes the overall capacity of each entrance, which provides ideas for future vehicle group control.</p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139587558","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}

引用次数: 0

Simulation of pedestrian interaction with autonomous vehicles via social force model 通过社会力量模型模拟行人与自动驾驶汽车的互动

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-01-26 DOI: 10.1016/j.simpat.2024.102901

Md Mobasshir Rashid, MohammadReza Seyedi, Sungmoon Jung

{"title":"Simulation of pedestrian interaction with autonomous vehicles via social force model","authors":"Md Mobasshir Rashid, MohammadReza Seyedi, Sungmoon Jung","doi":"10.1016/j.simpat.2024.102901","DOIUrl":"10.1016/j.simpat.2024.102901","url":null,"abstract":"<div><p>Simulation of pedestrian motion in urban traffic networks is crucial for designing autonomous vehicle systems. In a mixed traffic system, a complex interaction occurs between a pedestrian and a vehicle. To understand this interaction pattern and evaluate traffic safety analysis, a simulation tool can be useful. It can help autonomous vehicle designers to visualize pedestrian and vehicle trajectory, extract velocity and acceleration profile of both agents, test different autonomous vehicle planning algorithms, and assess the traffic safety in severe traffic conflicts. This paper presents a rule-based social force model to simulate pedestrian trajectories during interaction with an autonomous vehicle. The social force model is then integrated with an autonomous vehicle control and planning algorithm for simulating the behavior of both pedestrian and vehicle in traffic conflicts by varying different parameters such as agent's initial speed, different vehicle sensor types (error percentage of pedestrian detection varies), different pedestrian types (risk-taking, cautious, and distracted), etc. This simulation tool provides minimum distance accepted by a pedestrian during a road crossing scenario as output. Additionally, the simulation illustrates the impact of vehicle initial speed on crossing decision and minimum distance accepted by pedestrians before crossing. The simulation tool can be useful to simulate risky interaction scenarios to understand the effectiveness of autonomous vehicle planning algorithm while interacting with different types of pedestrians.</p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139587469","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}

引用次数: 0

METS-R SIM: A simulator for Multi-modal Energy-optimal Trip Scheduling in Real-time with shared autonomous electric vehicles METS-R SIM：使用共享自动驾驶电动汽车进行多模式实时能源优化行程调度的模拟器

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-01-17 DOI: 10.1016/j.simpat.2024.102898

Zengxiang Lei , Jiawei Xue , Xiaowei Chen , Xinwu Qian , Charitha Saumya , Mingyi He , Stanislav Sobolevsky , Milind Kulkarni , Satish V. Ukkusuri

{"title":"METS-R SIM: A simulator for Multi-modal Energy-optimal Trip Scheduling in Real-time with shared autonomous electric vehicles","authors":"Zengxiang Lei , Jiawei Xue , Xiaowei Chen , Xinwu Qian , Charitha Saumya , Mingyi He , Stanislav Sobolevsky , Milind Kulkarni , Satish V. Ukkusuri","doi":"10.1016/j.simpat.2024.102898","DOIUrl":"10.1016/j.simpat.2024.102898","url":null,"abstract":"<div><p>We develop an agent-based simulator named METS-R SIM to support operational decisions for multi-modal shared autonomous vehicle (SAEV) services. Compared with existing traffic<span> simulators, METS-R SIM offers several valuable features including: 1) A microscopic vehicle movement model for SAEV services, which allows us to explicitly model vehicular interactions and generate detailed speed and acceleration profiles for energy estimation. 2) An efficient implementation in which parallel computing is embedded in METS-R SIM which can update the state of different agents (e.g., vehicle locations in different links) simultaneously. 3) A modular and extensible framework as the simulator is built upon an agent-based modeling environment named Repast Simphony which is featured by its well-factored abstractions; in addition, a server-client structure is introduced to implement real-time operational algorithms such as energy-efficient routing and adaptive transit scheduling. 4) Open-source, reproducible with web-based visualization (METS-R SIM introduces these features to promote transparency). We validate METS-R SIM by matching the aggregated travel time and travel distance with the real observed ones obtained from New York City (NYC). We also compare the generated speed profiles qualitatively to the ones reported in published studies. We demonstrate the functionalities of our simulator by simulating SAEV services deployed to serve travel needs related to three main transportation hubs in NYC.</span></p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139497679","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}

引用次数: 0

Comparative study of Gazebo and Unity 3D in performing a virtual pick and place of Universal Robot UR3 for assembly process in manufacturing Gazebo 和 Unity 3D 在执行通用机器人 UR3 的虚拟拾取和放置过程中的比较研究

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-01-15 DOI: 10.1016/j.simpat.2024.102895

Guntur Danang Wijaya , Wahyu Caesarendra , Mohammad Iskandar Petra , Grzegorz Królczyk , Adam Glowacz

{"title":"Comparative study of Gazebo and Unity 3D in performing a virtual pick and place of Universal Robot UR3 for assembly process in manufacturing","authors":"Guntur Danang Wijaya , Wahyu Caesarendra , Mohammad Iskandar Petra , Grzegorz Królczyk , Adam Glowacz","doi":"10.1016/j.simpat.2024.102895","DOIUrl":"10.1016/j.simpat.2024.102895","url":null,"abstract":"<div><p>This paper presents a comparison literature study of two potential 3D robotic simulators i.e., Gazebo and Unity 3D to simulate a certain task. Apart of the literature review, the study also conducted a questionnaire survey collected from the robotics community and academia in the field of robotics. The objective of the literature study and the questionnaire is to gain an information related to the most appropriate 3D robotic simulator in creating virtual experience during a certain task which will be used for digital twin in the future study. The selected task is pick and place movement which is the basic part of the assembly process in the manufacturing industry. The questionnaire questions were focused on the user experience in using Gazebo and Unity 3D related to efficiency and other performance tests. To clarify the result obtained from the questionnaire, two identical 3D robotic simulation were built and created on the same assets to provide the objective performance comparison. The simulation is carried out by replicating the same standard 3D scene of UR3 in Gazebo and Unity 3D. According to the literature review, questionnaire, and the simulation result, it provides a new insight to enable a potential digital twin platform and to familiarise the user with the workflow on each platform.</p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139497675","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}

引用次数: 0

A multi-method simulation model to investigate the impact of sunflower seed segregation on silos 研究葵花籽隔离对筒仓影响的多方法模拟模型

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-01-09 DOI: 10.1016/j.simpat.2024.102897

Louise Coetsee, Wilna L. Bean

{"title":"A multi-method simulation model to investigate the impact of sunflower seed segregation on silos","authors":"Louise Coetsee, Wilna L. Bean","doi":"10.1016/j.simpat.2024.102897","DOIUrl":"10.1016/j.simpat.2024.102897","url":null,"abstract":"<div><p>The South African sunflower industry is considering transferring to a quality-based marketing system driven by an incentive. However, the ability of silos to offer necessary segregation services is critical in such a transition (Baker et al., 1997) and the silo industry is concerned about the negative impact segregation could have on operations and finances. This paper proposes a multi-method simulation approach to quantify the impact of quality-based segregation and sunflower farmer response to the incentive on silo bin utilisation and the ability of the silo to store contents of arriving trucks (service level). A combination of agent-based simulation, discrete event simulation and Bayesian network sampling is used to capture system behaviour where data is scarce. Therefore, in this study, a mixed methods ABM and DES model is implemented in a new environment: a grade-based segregation problem in the South African silo industry. Several scenarios are modelled to cross-validate methods and to tease out the impact of farmer response on the results. The model is applied to a case study silo complex to test the concept. Results obtained for the case study silo show a significant negative impact on costs due to lower service levels and bin utilisation, incurring relocation and opportunity costs. Overall, this study highlights that it is necessary to consider the impact that sunflower segregation could have on each unique silo complex and provides a method to quantify the stated impact.</p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1569190X2400011X/pdfft?md5=24be49e31e64a3d7e4a45a4245e2dc55&pid=1-s2.0-S1569190X2400011X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139423190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust parameter design for 3D printing process using stochastic computer model 利用随机计算机模型进行 3D 打印工艺的鲁棒参数设计

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-01-07 DOI: 10.1016/j.simpat.2024.102896

Chunfeng Ding , Jianjun Wang , Yiliu Tu , Xiaolei Ren , Xiaoying Chen

{"title":"Robust parameter design for 3D printing process using stochastic computer model","authors":"Chunfeng Ding , Jianjun Wang , Yiliu Tu , Xiaolei Ren , Xiaoying Chen","doi":"10.1016/j.simpat.2024.102896","DOIUrl":"10.1016/j.simpat.2024.102896","url":null,"abstract":"<div><p>3D printing technology has been developing rapidly in recent years, but product quality control has become one of the main obstacles to its widespread use in manufacturing. A new stochastic computer model and robust optimization method are proposed for the highly fluctuating 3D printing process to improve the stability of the printed product quality. Firstly, the signal and noise are jointly modeled, and the idea of latent variables in machine learning is incorporated to overcome the limitation that the replication times of the stochastic Kriging model must be greater than one. Then, the chain rule and Woodbury identity are utilized to reduce the time required for hyperparameter estimation of the model. Finally, the optimization objective function is constructed based on the Taguchi quality loss function, and optimal process parameters are found using a genetic algorithm. The numerical simulation results demonstrate that the robust optimization method based on heteroskedasticity Gaussian process model proposed in this paper can estimate model hyperparameters faster and predict results more accurately. Furthermore, the prediction and validation results of 3D printing experiments verify the effectiveness of the proposed method.</p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139374601","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}

引用次数: 0

Autonomous locomotion mode transition in quadruped track-legged robots: A simulation-based analysis for step negotiation 四足履带式机器人的自主运动模式转换：基于步协商的仿真分析

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-01-05 DOI: 10.1016/j.simpat.2024.102893

Jie Wang , Krispin Davies

{"title":"Autonomous locomotion mode transition in quadruped track-legged robots: A simulation-based analysis for step negotiation","authors":"Jie Wang , Krispin Davies","doi":"10.1016/j.simpat.2024.102893","DOIUrl":"10.1016/j.simpat.2024.102893","url":null,"abstract":"<div><p>Hybrid track/wheel-legged robots combine the advantages of wheel-based and leg-based locomotion, granting adaptability across varied terrains through efficient transitions between rolling and walking modes. However, automating these transitions remains a significant challenge. In this paper, we introduce a method designed for autonomous mode transition in a quadruped hybrid robot with a track/wheel-legged configuration, especially during step negotiation. Our approach hinges<span> on a decision-making mechanism that evaluates the energy efficiency of both locomotion modes using a proposed energy-based criterion. To guarantee a smooth negotiation of steps, we incorporate two climbing gaits designated for the assessment of energy usage in walking locomotion. Simulation results validate the method’s effectiveness, showing successful autonomous transitions across steps of diverse heights. Our suggested approach has universal applicability and can be modified to suit other hybrid robots of similar mechanical configuration, provided their locomotion energy performance is studied beforehand.</span></p></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139374600","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}

引用次数: 0

Telemetry-aided cooperative multi-agent online reinforcement learning for DAG task scheduling in computing power networks 用于计算能力网络中 DAG 任务调度的遥测辅助合作多代理在线强化学习

IF 4.2 2区计算机科学

Simulation Modelling Practice and Theory Pub Date : 2024-01-05 DOI: 10.1016/j.simpat.2023.102885

Yunfeng Duan , Jingchun Li , Hao Sun , Fanqin Zhou , Jiaxing Chen , Tiandong Wu , Wenjing Li , Yuxing Fan

引用次数: 0