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Spring Symposium on Theory of Modeling and simulation (SpringSim-TMS)

作者： Bosmans, Stig Mercelis, Siegfried Hellinckx, Peter Denil, Joachim Univ Antwerp IMEC IDLab Antwerp Belgium Univ Antwerp Flanders Make Antwerp Belgium

ISBN: (纸本)9781510860209

With the increase in Internet of Things devices and more decentralized architectures we see a new type of application gain importance, a type where local interactions between individual entities lead to a global emergent behavior, Emergent-based IoT (EBI) Systems. In this position paper we explore techniques to evaluate this emergent behavior in IoT applications. Because of the required scale and diversity this is not an easy task. Therefore, we mainly focus on a distributed simulation approach and provide an overview of possible techniques that could optimize the overall simulation performance. Our focus is both on modeling and simulation technology.

关键词： Internet of Things emergent behavior scalability parallel and distributed simulation

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Pore Networks simulation with parallel Greedy Algorithms 12

Pore Networks Simulation with Parallel Greedy Algorithms

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16th IEEE/ACM International Symposium on distributed simulation and Real Time Applications

作者： Roman-Alonso, G. Boukerche, A. Matadamas-Hernandez, J. Castro-Garcia, M. A. Univ Ottawa PARADISE Res Lab SITE Ottawa ON K1N 6N5 Canada Univ Autonoma Metropolitana Mexico City DF Mexico

ISBN: (纸本)9780769548463

Porous media simulation is an important contribution in the study of many physical phenomena. The NoMISS greedy algorithm outstands from the existing sequential algorithms for constructing a pore subnetwork, in a relatively fast way. However, despite the NoMISS time reduction, there are still problems related to the required processing time when very large networks need to be studied. In this work, a non scalable parallel version of the NoMISS algorithm is presented, and a new approach is proposed to alleviate this issue;in both versions cluster cores work simultaneously on different porous subnetwork spaces. The first approach, named as Unbounded-NoMISS, allows the cores to go forward with the initialization of the porous subnetwork space, applying a balancing policy when a core needs more data. At the end, the cores require a sequential synchronization to finish the porous network construction. The second approach, named as Bounded-NoMISS, controls the porous subnetwork initialization by considering a site-size boundary, avoiding the final strong synchronization and improving considerably the scalability. The obtained results using a 125-core cluster are presented.

关键词： parallel and distributed simulation parallel Scientific Applications Dynamic Data Distribution Cubic Pore Networks Dual Site-Bond Model Multi-core Programming

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A bounded-optimistic, parallel Beta-binders simulator 08

A bounded-optimistic, parallel Beta-binders simulator

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12th IEEE/ACM International Symposium on distributed simulation and Real Time Applications

作者： Leye, Stefan Uhrmacher, Adelinde M. Priami, Corrado Univ Rostock Dept Comp Sci D-18059 Rostock Germany CoSBi I-38100 Trento Italy

ISBN: (纸本)9780769534251

Compartments play an important role in molecular and cell biology modeling, which motivated the development of BETA-BINDERS, a formalism which is an extension of the pi-CALCULUS. To execute BETA-BINDERS models, sophisticated simulators are required to ensure a sound and efficient execution. parallel and distributed simulation represents one means to achieve the later. However, stochastically schedules events hamper the definition of look aheads for a conservative parallel synchronization scheme, while an optimistic parallel simulation implies expensive roll-back operations due to the dynamic structures of BETA-BINDERS models. Therefore, a time-bounded window approach is suggested, which allows the different logical processes to proceed optimistically up to a barrier. Rollbacks are thus temporally constrained. In addition, the dynamic structure of BETA-BINDERS models requires a special state handling. BETA-BINDERS models and states are represented as tree structures to facilitate state updates and roll-backs by the simulation engine.

关键词： parallel and distributed simulation process algebra discrete event simulation

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A direct execution approach to simulating mobile agent algorithms

A direct execution approach to simulating mobile agent algor...

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International Symposium on parallel and distributed Processing and Applications (ISPA 2003)

作者： Li, XH Cao, JN He, YX Hong Kong Polytech Univ Dept Comp Internet & Mobile Comp Lab Kowloon Hong Kong Peoples R China Wuhan Univ State Key Lab Software Engn Data & Knowledge Engn Lab Wuhan 430072 Hubei Peoples R China Wuhan Univ Sch Comp Parallel & Distributed Comp Lab Wuhan 430072 Hubei Peoples R China

Mobile agent technology has been applied to develop the solutions for various kinds of parallel and distributed computing problems. However, performance evaluation of mobile agent algorithms remains a difficult task, mainly due to the characteristics of mobile agents such as distributed and asynchronous execution, autonomy and mobility. This paper proposes a general approach based on direct execution simulation for evaluating the performance of mobile agent algorithms by collecting and analyzing the information about the agents during their execution. We describe the proposed generic simulation model, named MADES, the architecture of a software environment based on MADES, and a prototype implementation. A mobile agent-based distributed load balancing algorithm has been used for experiments with the prototype.

关键词： mobile agent direct execution simulation parallel and distributed simulation MADES

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The High Level Architecture (HLA) on Photonic Torus: Hardware and Software Co-design 8

The High Level Architecture (HLA) on Photonic Torus: Hardwar...

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8th EUROSIM Congress on Modelling and simulation (EUROSIM)

作者： Imre, Kayhan Sevim, Nevzat Hacettepe Univ Dept Comp Engn Ankara Turkey

ISBN: (纸本)9780769550732

The High Level Architecture (HLA) as a well-known IEEE standard for developing parallel and distributed simulation systems has been around for many years. In this paper, Runtime Infrastructure (RTI) of HLA is re-evaluated in the light of the current trends in many-core processor architectures. The future many-core processor architectures will contain thousands of cores connected with on chip networks. Such network on chip (NoC) architectures will not only be built as electronic networks but also as photonic networks. The communication links are established by using scalable communication patterns which define how the light paths to be setup in a 2D photonic network. In other words, RTI specific communication patterns orchestrate the underlying photonic network both to guarantee contention-free network operation and to utilize the bisection bandwidth available on the photonic torus. Time and data distribution management related algorithms are especially subject to this paper. Both the Greatest Available Logical Time (GALT) calculation algorithm and timestamp order (TSO) message delivery are carried out in small number of communication steps on 2D photonic torus. The approach taken in this work is based on hardware and software co-design.

关键词： parallel and distributed simulation High Level Architecture (HLA) photonic network communication many core processor architectures

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A New Opportunity to Urban Evacuation Analysis: Very Large Scale simulations of Social Agent Systems in Repast HPC 12

A New Opportunity to Urban Evacuation Analysis: Very Large S...

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ACM/IEEE/SCS 26th Workshop on Principles of Advanced and distributed simulation (PADS)

作者： Zia, Kashif Riener, Andreas Farrahi, Katayoun Ferscha, Alois Johannes Kepler Univ Linz Inst Pervas Comp A-4040 Linz Austria

ISBN: (纸本)9780769547145;9781467317979

Due to catastrophic disasters induced by forces of nature like flooding or tsunamis, terrorism or nuclear power plant accidents, understanding the dynamics of urban evacuation systems has elicited massive interest over the past years. While discrete event simulations of evacuation models become prohibitively complex dealing with the time, space and individual behavior, multiagent based models have revealed to be a potentially more effective. This paper introduces models of configurations of social agents at a massive scale, which, together with the most recent supercomputing technology, allows for a simulation analysis of realistic evacuation models at the level of large cities (10(6) - 10(8) agents). Agent based models of demographics and the morphology of cities together with population densities, mobility patterns, individual decision making, and agent interactions are implemented into a tool chain which ultimately generates Repast HPC code, which is then executed on a 2,048 node shared memory multiprocessor server (SGI Altix UV-1000). We demonstrate how different evacuation strategies can be assessed based on costly, yet feasible simulation runs - thus evidencing, that a whole class of demanding, very complex simulation problems has found a convincing solution.

关键词： parallel and distributed simulation Urban Evacuation Large-scale Agent-based Modeling Computational Social Science

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Some Problems of the simulation Model Efficiency and Flexibility 8

Some Problems of the Simulation Model Efficiency and Flexibi...

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8th EUROSIM Congress on Modelling and simulation (EUROSIM)

作者： Mikov, A. Zamyatina, E. Kozlov, A. Ermakov, S. Cuban State Univ Dept Comp Technol Krasnodar Russia Perm State Natl Res Univ Dept Comp Sci Perm Russia

ISBN: (纸本)9780769550732

simulation remains one of the most popular and sometimes the only method of investigation of the complex dynamical systems nowadays. The problems become more and more complicate and so simulation models become complicate and large scale too. So the modelers have to reduce the time of simulation run and overall time of the simulation model design, it's verification, validation and simulation experiment. The authors believe that the problem of efficiency and flexibility of simulation systems (program tools and linguistic construction) can be solved through it's automation and intellectualization. This paper discusses the problem of design and implementation of the distributed and parallel simulation systems using the power of several compute nodes of computer network (or cluster or multiprocessor computer). Authors suggest original approach to the synchronization and load balancing of the objects of distributed simulation model. Furthermore authors consider the problem of reduction of time needed to design and to debug a simulation model, the problems of the simulation tools adaptability and offer using models and methods of artificial intelligence in these cases.

关键词： parallel and distributed simulation optimistic and conservative algorithms load balancing automatic simulation model completeness ontology multi-agent system

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Advancing Automatic Code Generation for Agent-Based simulations on Heterogeneous Hardware 25th

Advancing Automatic Code Generation for Agent-Based Simulati...

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25th International Conference on parallel and distributed Computing (Euro-Par)

作者： Xiao, Jiajian Andelfinger, Philipp Cai, Wentong Richmond, Paul Knoll, Alois Eckhoff, David TUMCREATE Singapore Singapore Tech Univ Munich Munich Germany Nanyang Technol Univ Singapore Singapore Univ Sheffield Sheffield S Yorkshire England

ISBN: (纸本)9783030483401;9783030483395

The performance of agent-based simulations has been shown to benefit immensely from execution on hardware accelerator devices such as graphics processing units (GPUs). Given the increasingly heterogeneous hardware platforms available to researchers, it is important to enable modellers to target multiple devices using a single model specification, and to avoid the need for in-depth knowledge of the hardware. Further, key modelling steps such as the definition of the simulation space and the specification of rules to resolve conflicts among agents should be supported in a simple and generic manner, while generating efficient code. To achieve these goals, we extend the OpenABL modelling language and code generation framework by three aspects: firstly, a new OpenCL backend enables the co-execution of arbitrary agent-based models on heterogeneous hardware. Secondly, the OpenABL language is extended to support graph-based simulation spaces. Thirdly, we specify a generic interface for specifying conflict resolution rules. In a performance comparison to the existing OpenABL backends, we show that depending on the simulation model, the opportunity for CPU-GPU co-execution enables a speedup of up to 2.0 over purely GPU-based simulation.

关键词： Agent-based simulation parallel and distributed simulation Heterogeneous hardware OpenABL OpenCL

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distributed hybrid simulation of the Internet of things and smart territories

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CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2018年第9期30卷 e4370.1-e4370.20页

作者： D'Angelo, Gabriele Ferretti, Stefano Ghini, Vittorio Univ Bologna Dept Comp Sci & Engn Via Zamboni 33 I-40126 Bologna Italy

This paper deals with the use of hybrid simulation to build and compose heterogeneous simulation scenarios that can be proficiently exploited to model and represent the Internet of things (IoT). Hybrid simulation is a methodology that combines multiple modalities of modeling/simulation. Complex scenarios are decomposed into simpler ones, each one being simulated through a specific simulation strategy. All these simulation building blocks are then synchronized and coordinated. This simulation methodology is an ideal one to represent IoT setups, which are usually very demanding, due to the heterogeneity of possible scenarios arising from the massive deployment of an enormous amount of sensors and devices. We present a use case concerned with the distributed simulation of smart territories, a novel view of decentralized geographical spaces that, thanks to the use of IoT, builds ICT services to manage resources in a way that is sustainable and not harmful to the environment. Three different simulation models are combined together, namely, an adaptive agent-based parallel and distributed simulator, an OMNeT++ based discrete event simulator, and a script-language simulator based on MATLAB. Results from a performance analysis confirm the viability of using hybrid simulation to model complex IoT scenarios.

关键词： hybrid simulation Internet of things multilevel simulation parallel and distributed simulation smart cities

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Advanced simulation-based predictive modelling for solar irradiance sensor farms

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JOURNAL OF simulation 2024年

作者： Risco-Martin, Jose L. Prado-Rujas, Ignacio-Iker Campoy, Javier Perez, Maria S. Olcoz, Katzalin Univ Complutense Madrid Dept Comp Architecture & Automat C Prof Jose Garcia Santesmases 9 Madrid 28040 Spain Univ Politecn Madrid Dept Comp Syst Architecture & Technol Madrid Spain

The need for accurate solar power forecasting is critical for grid stability as solar energy becomes more prevalent. This paper presents a new framework called Cloud-based Analysis and Integration for Data Efficiency (CAIDE) for real-time monitoring and forecasting of solar irradiance in sensor farms. CAIDE can handle multiple sensor farms, enhance predictive models in real-time, and is built on Model Based Systems Engineering (MBSE) and Internet of Things (IoT) technologies. It can correct its forecasts, ensuring they stay current, and operates on various architectures, ensuring scalability. Tested on multiple sensor farms, CAIDE proved to be scalable and improved the initial accuracy of solar power production forecasts in real-time. This framework is significant for solar plant deployment and the advancement of renewable energy.

关键词： Complex systems discrete event system specification deep learning solar irradiance parallel and distributed simulation

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