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2021 Annual Modeling and Simulation Conference (ANNSIM)最新文献

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Studying the Spread of Diseases Using Geographical Data and Irregular Topologies with Cell-DEVS 利用Cell-DEVS研究地理数据和不规则拓扑的疾病传播
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552115
Román Cárdenas, Cristina Ruiz Martin, Gabriel A. Wainer, P. Dobias, Mark Rempel
Modeling and Simulation (M&S) techniques have been proven to be effective to understand how diseases spread and assess the effectiveness of decisions aimed to control them (e.g., mobility restrictions). Recently, governments used this approach to determine the evolution of the COVID-19 pandemic. In this context, M&S tools that consider geographical information can improve the quality of the simulations. This research presents a methodology that allows modelers to prototype disease spread models that include geographical information. The model can be easily parameterized for other geographical regions and diseases. We present a case study of a disease spread model to show how this methodology works.
建模和模拟(M&S)技术已被证明是了解疾病如何传播和评估旨在控制疾病的决策(例如,行动限制)有效性的有效方法。最近,各国政府使用这种方法来确定COVID-19大流行的演变。在这种情况下,考虑地理信息的M&S工具可以提高模拟的质量。这项研究提出了一种方法,使建模者能够建立包含地理信息的疾病传播模型原型。该模型可以很容易地参数化其他地理区域和疾病。我们提出了一个疾病传播模型的案例研究来展示这种方法是如何工作的。
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引用次数: 1
Modeling and Simulating Prescribed Fire Ignition Techniques 建模和模拟规定的点火技术
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552174
Xiaolin Hu, Mu Ge
Prescribed fire ignition techniques have significant impact on prescribed fires' growth behavior. This paper presents a systematic way of modeling and simulating prescribed fire ignition techniques. An ignition plan specification is developed to formally specify the ignition activities and schedules of prescribed burning events. The ignition plan specification is used by ignition agents, which transform an ignition plan into detailed tasks and carry out the ignition tasks while coupling with a fire spread simulation model. Simulation results of six ignition scenarios corresponding to six basic ignition techniques are provided. The simulation results demonstrate the effectiveness of the developed modeling approach and show that different ignition techniques can result in different fire growth patterns for prescribed fires.
规定点火技术对规定火灾的生长行为有显著影响。本文提出了一种系统的模拟和模拟规定点火技术的方法。制定了点火计划规范,以正式规定点火活动和规定燃烧事件的时间表。点火剂使用点火计划规范,将点火计划转化为详细的任务,并与火灾蔓延仿真模型耦合执行点火任务。给出了六种基本点火技术对应的六种点火场景的仿真结果。仿真结果表明了所建立的模型方法的有效性,并表明不同的点火技术会导致不同的火灾生长模式。
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引用次数: 1
Prediction of 5G New Radio Wireless Channel Path Gains and Delays Using Machine Learning and CSI Feedback 利用机器学习和CSI反馈预测5G新无线电无线信道路径增益和延迟
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552072
Ben Earle, A. Al-Habashna, Gabriel A. Wainer, Xingliang Li, Guoqiang Xue
Next generation wireless communication systems use massive Multi Input Multi Output (m-MIMO) antenna arrays for their enhanced beamforming capabilities. Providing accurate Channel State Information (CSI) is vital for optimizing m-MIMO communication systems. The complexity of channel reconstruction grows exponentially with the number of antennas, causing traditional methods to become increasingly complicated. Machine-learning techniques can be a useful alternative for channel reconstruction using partial CSI feedback. This paper presents the results of a simulation study built using the MATLAB 5G Toolbox and a neural network trained using the simulated data. The simulator emulates a 5G channel to generate its path delays and gains, and the realistic CSI feedback. This data was used to train and test a neural network to estimate the dominant path gains and delays. The models showed promising results while operating on limited CSI data.
下一代无线通信系统使用大规模多输入多输出(m-MIMO)天线阵列来增强波束形成能力。提供准确的信道状态信息(CSI)对于优化m-MIMO通信系统至关重要。随着天线数量的增加,信道重建的复杂性呈指数级增长,使得传统的方法变得越来越复杂。机器学习技术可以成为使用部分CSI反馈进行信道重建的有用替代方法。本文介绍了利用MATLAB 5G工具箱构建的仿真研究结果和利用仿真数据训练的神经网络。该模拟器模拟了5G信道,以产生其路径延迟和增益,以及真实的CSI反馈。该数据用于训练和测试神经网络,以估计主导路径增益和延迟。这些模型在有限的CSI数据上显示出令人满意的结果。
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引用次数: 2
Evaluating Azure Kinect and Structure Mark-II 3D Surface Scanners for Clinical Chest Wall Deformity Assessment 评估Azure Kinect和Structure Mark-II三维表面扫描仪用于临床胸壁畸形评估
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552061
Nahom Kidane, Yuzhong Shen, R. Kelly
A non-invasive and objective method of capturing upper body surface anatomy, such as 3D optical scanning, would be advantageous for evaluating chest wall deformity. By potentially eliminating the need for computed tomography scanning and superseding manual measurements subject to errors, a system that utilizes optical scanning presents great value to patients and practitioners. This work aimed to quantify the accuracy of two current generation 3D surface scanners, Azure Kinect & StructureIO Mark-II, in assessing the severity of chest wall deformities. 3D surface deviation analysis was conducted on the models created by each scanner, and the findings are reported.
一种非侵入性和客观的捕捉上体表面解剖结构的方法,如3D光学扫描,将有利于评估胸壁畸形。通过潜在地消除对计算机断层扫描的需要,并取代容易出错的人工测量,利用光学扫描的系统对患者和从业者呈现出巨大的价值。这项工作旨在量化两种当前一代3D表面扫描仪(Azure Kinect和StructureIO Mark-II)在评估胸壁畸形严重程度方面的准确性。对各扫描仪生成的模型进行了三维表面偏差分析,并报告了分析结果。
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引用次数: 1
Strategic Engineering Applied to Complex Systems within Marine Environment 战略工程应用于海洋环境中的复杂系统
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552035
A. Bruzzone, M. Massei, K. Sinelshchikov, A. Giovannetti, Bharath Kumar Gadupuri
The paper proposes an example of Strategic Engineering approach applied to a complex system related to Marine Environment with special attention to traffic control. This case represents an application of innovative discipline in terms of Strategic Management based on Artificial Intelligence, Modeling and Simulation to support decision makers while operating into a dynamic environment. The authors propose this methodological approach using data and extra information based on the strong combination of Simulation with other techniques. In facts the adoption of Strategic Engineering improves Strategic Management capabilities within Organizations or Institutions and the proposed case study is based on a realistic scenario and developed through different elements, models and simulators.
本文提出了一个将战略工程方法应用于与海洋环境有关的复杂系统的实例,并特别关注交通控制。本案例代表了基于人工智能、建模和仿真的战略管理创新学科的应用,以支持决策者在动态环境中运作。作者提出了这种方法方法,使用基于仿真与其他技术强结合的数据和额外信息。事实上,战略工程的采用提高了组织或机构内的战略管理能力,建议的案例研究是基于一个现实的场景,并通过不同的元素、模型和模拟器开发的。
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引用次数: 0
Modeling of Landscape Change and Tele-Coupling in Local Socio-Ecological Systems: A Simulation of Land Use Change and Recreational Activities in Southern Idaho, United States 美国爱达荷州南部土地利用变化与休闲活动的模拟:景观变化与当地社会生态系统的远程耦合
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552108
Li Huang, D. Cronan, A. Kliskey
The modeling of landscape change and socio-ecological systems (SES) tends to ignore the interactions across distance and boundaries. To fill the gap, this research analyzes landscape change by considering the tele-coupling effects at the local scale between Owyhee county and Treasure Valley in Idaho, United States. The spatial distribution of recreational activities in Owyhee county are modeled by Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST). Land use and cover change (LUCC) are simulated using Multi-Layer Perceptron Neural Network (MLPNN). Results show that the tele-coupling effects have significant impacts on the nature-based recreation in Owyhee county. With the tele-coupling effects, MLPNN has achieved a high overall accuracy and kappa coefficient in LUCC. The findings suggest that the tele-coupling effects should be incorporated into the modeling of landscape change and SES. This study also provides policy implications for land management and stakeholder involvement in accommodating landscape change.
景观变化和社会生态系统(SES)的建模往往忽略了跨越距离和边界的相互作用。为了填补这一空白,本研究考虑了美国爱达荷州奥怀希县和宝藏谷在局部尺度上的远程耦合效应,分析了景观变化。采用生态系统服务与权衡综合评价方法(InVEST)对奥怀希县游憩活动的空间分布进行了建模。利用多层感知器神经网络(MLPNN)对土地利用/覆被变化(LUCC)进行了模拟。结果表明,远耦合效应对奥怀希县自然游憩有显著影响。利用远端耦合效应,MLPNN在土地覆盖变化中获得了较高的总体精度和kappa系数。研究结果表明,应将远耦合效应纳入景观变化和生态系统的模拟中。这项研究也为土地管理和利益相关者参与适应景观变化提供了政策启示。
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引用次数: 0
Gaussian Process Regression for Aggregate Baseline Load Forecasting 基于高斯过程回归的总体基线负荷预测
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552156
Kadir Amasyali, M. Olama
Demand response (DR) is one of the most effective ways to maintain the reliability and improve the flexibility of power systems. Accurate forecasts of baseline loads are essential for DR programs. In the era of big data, machine learning-based approaches present a unique opportunity for baseline load forecasting. Thus, this paper presents a machine learning-based approach using a relatively less explored algorithm, Gaussian process regression (GPR), to forecast aggregate baseline loads. As such, a dataset was generated using a set of EnergyPlus simulations. Using the generated dataset, a GPR-based forecasting model was developed. In addition, support vector regression (SVR)-, artificial neural network (ANN)-, and averaging-based models were developed as baseline models for comparison. These models were compared in terms of accuracy, simplicity, and integrity. The prediction performance of the models showed that the GPR-based model is more accurate and reliable than the others. Such high performance shows the potential of the GPR in baseline load forecasting. GPR, therefore, can be used for DR applications.
需求响应是维持电力系统可靠性和提高电力系统灵活性的最有效手段之一。对基线负荷的准确预测对灾备计划至关重要。在大数据时代,基于机器学习的方法为基线负荷预测提供了独特的机会。因此,本文提出了一种基于机器学习的方法,使用一种相对较少探索的算法,高斯过程回归(GPR),来预测总基线负载。因此,使用一组EnergyPlus模拟生成了一个数据集。利用生成的数据集,建立了基于gpr的预测模型。此外,还开发了支持向量回归(SVR)-、人工神经网络(ANN)-和基于平均的模型作为基线模型进行比较。这些模型在准确性、简单性和完整性方面进行了比较。模型的预测性能表明,基于gpr的模型比其他模型更准确、可靠。如此优异的性能显示了GPR在基线负荷预测方面的潜力。因此,GPR技术可以用于容灾。
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引用次数: 0
MADES: A Unified Framework for Integrating Agent-Based Simulation with Multi-Agent Reinforcement Learning MADES:集成基于agent的仿真与多agent强化学习的统一框架
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552052
Xiaohan Wang, Lin Zhang, Y. Laili, Kunyu Xie, H. Lu, Chun Zhao
Agent-Based Simulation (ABS) provides distributed entities for simulating agent emergence or interactive behaviors, but the agent behaviors usually rely on the hard rules, thus lacking the intelligent decision-making capability. With the development of artificial intelligence, Multi-Agent Reinforcement Learning (MARL) has shown positive potential in robot control, autonomous driving, and human-machine battles as its powerful learning capability for making intelligent decisions. There are many challenges in applying MARL directly to ABS, and there is no unified framework that integrates them. The paper proposed the Multi-Agent Discrete Event Simulation (MADES) framework based on several DEVS atomic models to construct the multi-agent system, which has advantages for representing various MARL architectures. A predator-prey system simulation with a mainstream MARL algorithm is built under our framework, the training curves and event transition time figure have verified the learning and the simulation performance of the framework.
基于agent的仿真(ABS)为模拟agent的出现或交互行为提供了分布式实体,但agent的行为通常依赖于硬规则,缺乏智能决策能力。随着人工智能的发展,多智能体强化学习(Multi-Agent Reinforcement Learning, MARL)以其强大的学习能力进行智能决策,在机器人控制、自动驾驶、人机战斗等领域显示出积极的潜力。将MARL直接应用于ABS存在许多挑战,目前还没有统一的框架来集成它们。本文提出了基于多个DEVS原子模型的多智能体离散事件仿真(MADES)框架来构建多智能体系统,该框架具有表示各种MARL体系结构的优势。在我们的框架下建立了一个具有主流MARL算法的捕食者-猎物系统仿真,训练曲线和事件转移时间图验证了框架的学习性能和仿真性能。
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引用次数: 2
Towards a Categorical Semantics of DEVS 面向DEVS的范畴语义
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552075
Jean-Pierre Müller
DEVS (Discrete EVent System) has been proposed to formalize discrete dynamical systems and is widely used for modeling and simulation. Although the operational semantics of DEVS models is well defined, and it exists some attempt to characterize their behavior using temporal logics, there is no attempt to define their denotational semantics. The meaning of a DEVS model is the set of possible coupled input, output and state trajectories. Therefore, denotational semantics is a mapping from DEVS models onto an algebra of trajectories. In this paper, we use category theory to define this algebra. This algebra, called Dyn, is made of trajectories as objects, and the DEVS behavior and structure specifications are mapped onto morphisms between trajectories, exhibiting their coupling. This result opens the way to algebraic manipulations of DEVS models, as well as the access to the results and proof mechanisms available in category theory.
离散事件系统(DEVS, Discrete EVent System)被提出用于形式化离散动力系统,并广泛用于建模和仿真。尽管DEVS模型的操作语义定义得很好,并且存在一些尝试使用时间逻辑来描述其行为的尝试,但没有尝试定义其指称语义。DEVS模型的含义是一组可能耦合的输入、输出和状态轨迹。因此,指称语义是从DEVS模型到轨迹代数的映射。在本文中,我们用范畴论来定义这个代数。这个代数称为Dyn,由轨迹作为对象组成,DEVS的行为和结构规范被映射到轨迹之间的态射上,显示它们的耦合。这一结果为DEVS模型的代数操作开辟了道路,也为范畴论中可用的结果和证明机制提供了途径。
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引用次数: 0
CD2: An Automation Tool for Cell-Devs CO2 Diffusion Models CD2: Cell-Devs CO2扩散模型的自动化工具
Pub Date : 2021-07-19 DOI: 10.23919/ANNSIM52504.2021.9552044
H. Khalil, G. Wainer
Measuring Carbon Dioxide and studying its diffusion indoors has many applications, which include, but not limited to, maintaining air quality, conserving energy, and minimizing viral infections. On the one hand, many of the experiments needed to conduct studies, like the indoor diffusion of Carbon Dioxide, are complex to implement. On the other hand, adjusting each model manually to mimic the studied space is difficult and prone to error. We propose an automation tool for modeling, simulating, and visualizing Carbon Dioxide. The tool automates the simulation of Cellular Discrete Event Simulation models of Carbon Dioxide dispersion indoors. We discuss the tool's applications, the software architecture, related tools, and a case study. The case study compares simulations of a closed space with different configurations. The results show how such configurations affect Carbon Dioxide concentration.
测量二氧化碳并研究其在室内的扩散有许多应用,包括但不限于保持空气质量、节约能源和减少病毒感染。一方面,进行研究所需的许多实验,如二氧化碳的室内扩散,实施起来很复杂。另一方面,手动调整每个模型来模拟所研究的空间是困难的,而且容易出错。我们提出了一个自动化工具,用于建模、模拟和可视化二氧化碳。该工具可自动模拟室内二氧化碳分散的细胞离散事件模拟模型。我们将讨论该工具的应用程序、软件体系结构、相关工具和案例研究。案例研究比较了不同配置的封闭空间的模拟。结果显示了这种结构对二氧化碳浓度的影响。
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引用次数: 2
期刊
2021 Annual Modeling and Simulation Conference (ANNSIM)
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