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Proceedings of the Winter simulation Conference

作者： Simon J. E. Taylor Charles M. Macal Andrea Matta Markus Rabe Susan M. Sanchez Guodong Shao Modelling & Simulation Group Department of Computer Science Brunel University London Uxbridge UK Decision & Infrastructure Sciences Division Argonne National Laboratory Lemont USA Department of Mechanical Engineering Politecnico di Milano Milano Italy Department IT in Production and Logistics TU Dortmund University Dortmund Germany Operations Research Department Naval Postgraduate School Monterey USA Engineering Laboratory National Institute of Standards and Technology Gaithersburg USA

ISBN: (纸本)9798350369663

simulations are used to investigate physical systems. A digital twin goes beyond this by connecting a simulation with the physical system with the purpose of analyzing and controlling that system in real-time. In the past 5 years there has been a substantial increase in research into simulation and Artificial Intelligence (AI). The combination of simulation with AI presents many possible innovations. Similarly, combining AI with simulation presents further possibilities including approaches to developing trustworthy and explainable AI methods, solutions to problems arising from sparce or no data and better methods for time series analysis. Given the progress that has been made in Digital Twins and simulation and AI, what opportunities are there from combining these two exciting research areas? What challenges need to be overcome to achieve these? This article discusses these from the perspectives of six leading members of the Modeling & simulation community.

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Modeling and simulation to Improve Real Electric Vehicles Charging Processes by Integration of Renewable Energies and Buffer Storage

Modeling and Simulation to Improve Real Electric Vehicles Ch...

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simulation Winter Conference

作者： Konstantin Sing Pierre Mertiny Marco Pruckner Department of Mechanical Engineering University of Erlangen-Nürnberg Erlangen GERMANY Department of Mechanical Engineering University of Alberta Edmonton Alberta CANADA Modeling and Simulation Institute of Computer Science University of Würzburg Würzburg GERMANY

ISBN: (纸本)9781665476621

The present study explores a simulation model combining system dynamics and discrete-event simulation for an electric vehicle charging system. For the representation of the charging demand the model employs data from an actual facility for vehicle charging. While being connected to the electrical grid, the system is augmented by a solar photovoltaic installation and stationary battery energy storage. Multiple simulation runs were performed to analyze the considered energy system over a 1-year period and compare relevant output parameters for different system configurations and system locations. Results show that a solar photovoltaic installation can be effectively integrated. For the degree of self-sufficiency, high values of 87 % can be achieved with combined solar photovoltaic and battery energy storage systems.

关键词： Photovoltaic systems Renewable energy sources System dynamics Buffer storage Carbon dioxide Electric vehicle charging Data models

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Transport of Jeffrey fluid in a rectangular slit of the microchannel under the effect of uniform reabsorption and a porous medium

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Communications in Theoretical Physics 2021年第11期73卷 31-46页

作者： H Mehboob K Maqbool R Ellahi Sadiq M Sait Department of Mathematics and Statistics International Islamic UniversityIslamabadPakistan Center for Modeling&Computer Simulation Research InstituteKing Fahd University of Petroleum&MineralsDhahran-31261Saudi Arabia Fulbright Fellow Department of Mechanical EngineeringUniversity of California RiversideUnited States of America Centre for Communications and IT Research Research InstituteKing Fahd University of Petroleum&MineralsDhahran-31261Saudi Arabia

This research explores the transport of a Jeffrey fluid through a permeable slit of microchannel under the effect of a porous medium and constant *** laws of fluid mechanics are used to study the flow in a cross-sectional area of a narrow slit which generates a highly nonlinear system of partial differential equation with nonhomogeneous boundary *** solve the complex boundary value problem;a recursive(Langlois)approach is used and explicit expressions for velocity,pressure,stream function,flux,shear stress and fractional reabsorption are *** is noticed that the flow rate at the centre line of slit and shear stress on the walls of slit decay due to the presence of porous medium and viscoelastic fluid *** is also quantitatively observed that more pressure is required for the fluid flow when the slit is filled with a porous medium and reabsorption on the walls is *** mathematical results of the present research have significant importance in the field of biofluid mechanics and medical industry,therefore the application of a diseased rat kidney is also included in this research:and reabsorption velocities in the case of a diseased and a healthy rat kidney are calculated with the effects of a porous medium and constant re-absorption.

关键词： creeping flow Jeffrey fluid uniform re-absorption porous medium permeable slit micro channel Langlois approach

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Two-Dimensional Thin Layer Convective Flow and Heat Transfer of a Dusty Fluid on a Nonlinear Stretching Sheet

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Multiscale Science and engineering 2022年第3期4卷 111-118页

作者： Islam, Md. Robiul Ferdows, M. Misra, J. C. Murtaza, M. G. Research Group of Fluid Flow Modeling and Simulation Department of Applied Mathematics University of Dhaka Dhaka Bangladesh Department of Computer Science and Engineering Green University of Bangladesh Dhaka Bangladesh Centre for Healthcare Science and Technology Indian Institute of Engineering Science and Technology Howrah India Department of Mathematics Comilla University Cumilla Bangladesh

In this study, steady two-dimensional boundary layer flow and heat transfer of a dusty fluid over a nonlinearly stretching sheet with variable thickness, $${u}_{w} (x)={U}_{0}{(x+b)}^{m}$$ has been considered. A variable magnetic field is applied transversely to the direction of the flow. The general problem has been reduced to a system of coupled non-linear ordinary differential equations of two-dimensional boundary layer. By means of similarity transformation, the basic governing equations are transformed into a set of nonlinear ordinary differential equation and then are solved numerically by dsolve routine in MAPLE. Results of the present study have been duly validated by adopting an appropriate procedure. The influence of various parameters such as velocity power index, wall thickness parameter, magnetic parameter fluid-particle interaction parameter for velocity, fluid-particle interaction parameter for temperature, mass concentration of dust particle, Prandtl number, Eckert number has been investigated. The effects are then presented graphically both for dust phase and fluid phase. It is clear that flow field and other quantities of physical interest are significantly influenced by these parameters. Also the effects of the parameters on the skin-friction coefficients and rate of heat transfer in terms of the Nusselt number, which are of physical interest, are shown graphically/in tabular form. The study reveals that the impact of the parameters for the dusty fluid on Nusselt number is considerably higher than that for a clean fluid.

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Leveraging Intel SGX to enable trusted and privacy preserving membership service in distributed ledgers

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International Journal of Information and computer Security 2021年第1-2期16卷 63-83页

作者： Liang, Xueping Shetty, Sachin Tosh, Deepak K. Foytik, Peter Zhang, Lingchen Institute of Information Engineering Chinese Academy of Sciences Beijing China School of Cyber Security University of Chinese Academy of Sciences Beijing China Virginia Modeling Analysis and Simulation Center Old Dominion University NorfolkVA United States Department of Computer Science University of Texas at EL Paso El PasoTX United States

Distributed ledger technology (DLT) provides decentralised services by removing the need of trust among distributed nodes in the distributed system. Transactions across the network are visible to all participants. However, some transactions may contain sensitive information such as business contracts or even personal health records. To protect user privacy, the architecture of distributed multi-channel ledger with membership service as a critical component can be adopted. The proposed multi-channel membership service architecture combines two promising technologies, distributed ledger and Intel Software Guard Extensions (SGX). With SGX remote attestation and isolated execution, each node is enrolled as a trusted entity to the channels, which separate different applications and provide better flexibility. We propose security properties for membership service in distributed ledger and illustrate how SGX help to achieve these properties in each phase. Security analysis and evaluation show that the proposed architecture could enhance the privacy preservation and capabilities against attacks. Copyright © 2021 Inderscience Enterprises Ltd.

关键词： Blockchain

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2D multiple waves scattering for active detection of a dummy human body in a low frequency range and for various boundary conditions 12

2D multiple waves scattering for active detection of a dummy...

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12th International Conference on Mathematical Modeling in Physical Sciences, IC-MSQUARE 2023

作者： Bibcu, Dorin Florescu Culea, Anisia Moldovanu, Simona Moraru, Luminita The Modelling & Simulation Laboratory University "Dunǎrea de Jos" of Galati 47 Domneasca Street Galati800008 Romania University "Dunǎrea de Jos" of Galati Business Administration Department 59-61 N. Balcescu St. Galati800001 Romania Department of Electronics and Telecommunications Faculty of Automation Computers Electrical Engineering and Electronics Galati University "Dunǎrea de Jos" of Galati 47 Domneasca Str. Galati800008 Romania Department of Computer Science and Information Technology Faculty of Automation Computers Electrical Engineering and Electronics University 'Dunǎrea de Jos' of Galati 47 Domneasca Street Galati800008 Romania Department of Chemistry Physics & Environment Faculty of Sciences and Environment University "Dunǎrea de Jos" of Galati 47 Domneasca Street Galati800008 Romania

This paper investigates the results of simulations devoted to the acoustic field variation caused by different boundary conditions applied to the backscattering of the acoustic wave in both low and moderately low frequency ranges. The goal is to analyse the object behaviour and the detection ability of the 2D acoustic field approximations when the simulation data of the scattered sound field is available. The plane waves are backscattered by a dummy human body, positioned in a cabin which has a defined size. The dummy human body is created by using clusters of finite and disjointed but tangent circular cylinders. Each cylinder is a scatterer that emulates various boundary conditions i.e., the scatterers can be sound-soft (Dirichlet boundary condition) and sound-hard scatterers (Neumann boundary condition). The cylinders are filled with biological tissue (i.e., fat). The exterior scattering problem is solved using the preconditioned Krylov subspace iterative solvers (GMRES), as a computationally cheaper alternative. We use the hypothesis that the mass density of the obstacle and wave speed in the obstacle are both constant. During the simulation experiments, we neglected the interactions among scatterers. A frequency range from 100 Hz to 1000 Hz is analysed. Both the Sound Pressure Level (SPL) and Radar Cross Section (RCS) are used to analyse the numerical simulation of the sound field. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Acoustic fields

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Implications of COVID-19 for the Electricity Industry: A Comprehensive Review

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CSEE Journal of Power and Energy Systems 2020年第3期6卷 489-495页

作者： Haiwang Zhong Zhenfei Tan Yiliu He Le Xie Chongqing Kang Department of Electrical Engineering the State Key Lab of Control and Simulation of Power Systems and Generation EquipmentInstitute for National Governance and Global GovernanceTsinghua UniversityBeijing 100084China Department of Electrical and Computer Engineering Texas A&M UniversityCollege StationTX 77843 USA

As COVID-19 sweeps through the whole world,human activities have been changed *** such circumstances,the electricity sector is deeply affected and faced with great *** paper provides a comprehensive review of the impacts that the pandemic has caused on the electricity *** demand has dropped sharply as governments around the world executed lockdown restrictions,while the load composition and daily load profile have also *** share of renewable generation has increased against the decline of the total electricity *** power balance situation and increased uncertainty of demand have posed higher pressure on system operators,along with voltage violation issue and challenges for system maintenance and *** electricity market is also substantially influenced,while longterm investment in clean energy is expected to be *** externality such as emission reduction is also discussed.

关键词： COVID-19 electricity industry energy market pandemic power system

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Predictive coordinated control of fuel consumption and emissions for diesel engine vehicles under intelligent network environments

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Science China(Information Sciences) 2021年第9期64卷 255-257页

作者： Di LIU Hong CHEN Jinwu GAO Jinghua ZHAO Yunfeng HU State Key Laboratory of Automotive Simulation and Control Jilin University Department of Control Science and Engineering Jilin University Computer College Jilin Normal University

Dear editor,Diesel engines have been widely used in vehicles because of their excellent fuel efficiency and durability. Although they only represent a small percentage of vehicle ownership, they cause the majority of ... 详细信息

关键词： Information Systems and Communication Service

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Adaptive fast-reaching nonsingular terminal sliding mode tracking control for quadrotor UAVs subject to model uncertainties and external disturbances

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Ain Shams engineering Journal 2023年第8期14卷

作者： Mobayen, Saleh El-Sousy, Fayez F.M. Alattas, Khalid A Mofid, Omid Fekih, Afef Rojsiraphisal, Thaned Graduate School of Intelligent Data Science National Yunlin University of Science and Technology 123 University Road Section 3 Douliou Yunlin640301 Taiwan Department of Electrical Engineering Prince Sattam Bin Abdulaziz University Al Kharj Saudi Arabia Department of Computer Science and Artificial Intelligence College of Computer Science and Engineering University of Jeddah Jeddah Saudi Arabia Department of Electrical and Computer Engineering University of Louisiana at Lafayette Lafayette United States Advanced Research Center for Computational Simulation Department of Mathematics Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Data Science Research Center Department of Mathematics Faculty of Science Chiang Mai University Chiang Mai50200 Thailand

This paper proposes an adaptive fast-reaching nonsingular terminal sliding mode control approach for the position and attitude tracking control of a quadrotor UAV subject to model uncertainty and external disturbances. To this end, a fast-reaching nonsingular terminal sliding surface is defined with the aim of fast convergence of the tracking error. The fast reachability of the nonsingular terminal sliding surface is proven using the Lyapunov stability theory. Since, in practice, the upper bounds of model uncertainties and external disturbances are unknown, an adaptive control scheme is considered to approximate them. The fast-reaching nonsingular terminal sliding mode control approach was augmented with the adaptive scheme to ensure both, the fast convergence of the switching surfaces and the rejection of model uncertainties and external disturbances. The effectiveness of the proposed adaptive fast-reaching nonsingular terminal sliding mode control approach is assessed using simulations of a quadrotor system implemented in MATLAB/Simulink software. The obtained results are further compared to those of an existing approach in terms of tracking performance, robustness, and integrator of absolute-value of error criteria. © 2022 THE AUTHORS

关键词： Unmanned aerial vehicles (UAV)

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Enhancing Digital Twins with Advances in simulation and Artificial Intelligence: Opportunities and Challenges

Enhancing Digital Twins with Advances in Simulation and Arti...

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2023 Winter simulation Conference, WSC 2023

作者： Taylor, Simon J. E. MacAl, Charles M. Matta, Andrea Rabe, Markus Sanchez, Susan M. Shao, Guodong Brunel University London Modelling & Simulation Group Department of Computer Science UxbridgeUB8 3PH United Kingdom Argonne National Laboratory Decision & Infrastructure Sciences Division LemontIL60439 United States Politecnico di Milano Department of Mechanical Engineering Via La Masa 1 Milano20156 Italy Tu Dortmund University Department It in Production and Logistics Leonhard-Euler-Straße 5 Dortmund44227 Germany Naval Postgraduate School Operations Research Department 1 University Circle MontereyCA93943 United States National Institute of Standards and Technology Engineering Laboratory 100 Bureau Drive GaithersburgMD20899 United States

ISBN: (纸本)9798350369663

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