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2012 11th International Symposium on parallel and distributed Computing, ISPDC 2012

作者： Ruess, Martin Varduhn, Vasco Rank, Ernst Yosibash, Zohar Technische Universität München Department of Computation in Engineering Munich Germany Ben-Gurion University of the Negev Dept. of Mechanical Engineering Beer Sheva Israel

ISBN: (纸本)9780769548050

the focus of this contribution is on the parallelization of the Finite Cell Method (FCM) applied for biomechanical simulations of human femur bones. the FCM is a high-order fictitious domain method that combines the simplicity of Cartesian grids with the beneficial properties of hierarchical approximation bases of higher order for an increased accuracy and reliablility of the simulation model. A pre-computation scheme for the numerically expensive parts of the finite cell model is presented that shifts a significant part of the analysis update to a setup phase of the simulation, thus increasing the update rate of linear analyses with time-varying geometry properties to a range that even allows user interactive simulations of high quality. Paralellization of both parts, the pre-computation of the model stiffness and the update phase of the simulation is simplified due to a simple and undeformed cell structure of the computation domain. A shared memory parallelized implementation of the method is presented and its performance is tested for a biomedical application of clinical relevance to demonstrate the applicability of the presented method. © 2012 IEEE.

关键词： Biomechanics

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the application of OpenGL in bridge simulation

The application of OpenGL in bridge simulation

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11th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking and parallel/distributed Computing, SNPD2010

作者： Wang, Jieyuan Xia, Chunfen School of Materials Science and Engineering Wuhan University of Technology Wuhan Hubei China School of Computer Science Wuhan University of Technology Wuhan Hubei China

ISBN: (纸本)9780769540887

Using three-dimensional finite element to analyze the bridge structure, the article use OpenGL to research bridge three-dimensional modeling and render realistic graphics. Based on this, we develop bridge structure dynamic simulation system. Take a large bridge engineering for example, and combined with the actual usage situation, we simulate and analyze the following several aspects: traffic flow changes, overloaded vehicles through the bridge, temperature limit state and some situation after several component failure, which to verify structure strength, understand the working performance of the bridge structure, improve bridge design theory and provide technical reference for the similar bridges simulation analysis. © 2010 IEEE.

关键词： Bridges

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parallel Factor Decomposition Channel Estimation in RIS-Assisted Multi-User MISO Communication 11

Parallel Factor Decomposition Channel Estimation in RIS-Assi...

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IEEE 11th Sensor Array and Multichannel Signal Processing workshop (SAM)

作者： Li Wei Huang, Chongwen Alexandropoulos, George C. Yuen, Chau Singapore Univ Technol & Design Engn Prod Dev Singapore Singapore Natl & Kapodistrian Univ Athens Dept Informat & Telecommun Athens Greece

ISBN: (纸本)9781728119465

Reconfigurable Intelligent Surfaces (RISs) have been recently considered as an energy-efficient solution for future wireless networks due to their fast and low power configuration enabling massive connectivity and low latency communications. Channel estimation in RIS-based systems is one of the most critical challenges due to the large number of reflecting unit elements and their distinctive hardware constraints. In this paper, we focus on the downlink of a RIS-assisted multi-user Multiple Input Single Output (MISO) communication system and present a method based on the parallel FACtor (PARAFAC) decomposition to unfold the resulting cascaded channel model. the proposed method includes an alternating least squares algorithm to iteratively estimate the channel between the base station and RIS, as well as the channels between RIS and users. Our selective simulation results show that the proposed iterative channel estimation method outperforms a benchmark scheme using genie-aided information. We also provide insights on the impact of different RIS settings on the proposed algorithm.

关键词： Reconfigurable intelligent surfaces parallel factor decomposition iterative channel estimation metasurfaces

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ON thE PERFORMANCE OF STATIC AND DYNAMIC LOCATION MANAGEMENT STRATEGIES IN MOBILE COMPUTING

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INTERNATIONAL JOURNAL OF FOUNDATIONS OF COMPUTER SCIENCE 2011年第3期22卷 519-546页

作者： Taheri, Javid Zomaya, Albert Y. Univ Sydney Sch Informat Technol Ctr Distributed & High Performance Comp Sydney NSW 2006 Australia

this work reviews a number of algorithms to solve the location management problem in mobile networks for both static and dynamic scenarios. In the static mode, results of five algorithms are used to highlight the pros and cons for each algorithm. these results provide new insight into the mobility management problem that can influence the design of future wireless networks. In the dynamic mode in which mobile users' past movement patterns are used in making future paging decisions by the network, the performance of an online location management algorithm is examined under different deployment setups. Performance results of this algorithm show its advantages over the currently implemented and/or proposed static location management systems (including GSM).

关键词： Location management problem fuzzy logic intelligent algorithms

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Proceedings of the 11th ECMWF workshop on the Use of High Performance Computing in Meteorology

Proceedings of the 11th ECMWF Workshop on the Use of High Pe...

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2004 11th ECMWF workshop on the Use of High Performance Computing in Meteorology

ISBN: (纸本)9812563547

the proceedings contain 20 papers. the topics discussed include: creating science driven system architectures for large scale science;programming models and languages for high-productivity computing systems;operation status of the earth simulator;non-hydrostatic atmospheric GCM development and its computational performance;PDAF - the parallel data assimilation framework: experiences with kalman filtering;optimal approximation of kalman filtering with temporally local 4D-Var in operational weather forecasting;Intel architecture based high-performance computing technologies;distributed data management at DKRZ;supercomputing upgrade at the Australian Bureau Of Meteorology;the weather research and forecast model: software architecture and performance;and task geometry for commodity Linux clusters and grids: a solution for topology-aware load balancing of synchronously coupled, asymmetric atmospheric models.

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distributed Model Predictive Control with Switching Topology Network 11

Distributed Model Predictive Control with Switching Topology...

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11th Asian Control Conference (ASCC)

作者： Qiu, Quanwei Yang, Fuwen Zhu, Yong Griffith Univ Griffith Sch Engn Gold Coast Qld 4222 Australia

ISBN: (纸本)9781509015733

this paper is concerned with distributed model predictive control for a discrete-time target linear system over a controller communication network with switching topology. the global system is decomposed into N subsystems and N optimization problems are solved in parallel to minimize an upper bound on a robust performance objective by using a state-feedback controller for each subsystem. the considered topology evolution of the control network is assumed to be subject to a Markov chain. An extended cone complementarity linearization method (CCLM) is used to solve the constrained linear matrix inequality (CLMI) and a Bisection method based iterative algorithm is adopted to find the optimal solution. simulation results illustrate the effectiveness of the proposed method.

关键词： Linear matrix inequalities

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World-Wide distributed Multiple Replications in parallel for Quantitative Sequential simulation

World-Wide Distributed Multiple Replications in Parallel for...

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11th International Conference on Algorithms and Architectures for parallel Processing (ICA3PP)

作者： Haque, Mofassir Pawlikowski, Krzysztof McNickle, Don Ewing, Gregory Univ Canterbury Dept Comp Sci Christchurch 8140 New Zealand Univ Canterbury Dept Management Christchurch 8140 New Zealand

ISBN: (纸本)9783642246685

With the recent deployment of global experimental networking facilities, dozens of computer networks with large numbers of computers have become available for scientific studies. Multiple Replications in parallel (MRIP) is a distributed scenario of sequential quantitative stochastic simulation which offers significant speedup of simulation if it is executed on multiple computers of a local area network. We report results of running MRIP simulations on PlanetLab, a global overlay network which can currently access more than a thousand computers in forty different countries round the globe. Our simulations were run using Akaroa2, a universal controller of quantitative discrete event simulation designed for automatic launching of MRIP-based experiments. Our experimental results provide strong evidence that global experimental networks, such as PlanetLab, can efficiently be used for quantitative simulation, without compromising speed and efficiency.

关键词： Multiple Replications in parallel Experimental networking facilities Akaroa2 PlanetLab Sequential quantitative stochastic simulation Open queuing network

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Towards a distributed reality: A multi-video approach to xR 11

Towards a distributed reality: A multi-video approach to xR

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11th ACM SIGMM workshop on Immersive Mixed and Virtual Environment Systems, MMVE 2019

作者： Villegas, Alvaro Pérez, Pablo González-Sosa, Ester Nokia Bell Labs Madrid Spain

ISBN: (纸本)9781450362993

In this article we define the concept of distributed Reality, a new form of immersive media based on the combination of captured realities (e.g a remote and a local one), hence with a strong focus on video. While Virtual Reality fully substitutes the real surrounding with a simulation and all existing variations of Mixed Reality just provide additional synthetic elements into our visual field, our proposal is to capture and segment different scenes (one of them being the local one) in real time and merge the resulting elements dynamically, to create a completely new reality in front of the user senses. We compare this concept with prior art in the field and describe a taxonomy in which it fits. © 2019 Association for Computing Machinery.

关键词： Mixed reality

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Steps towards GPU accelerated aggregation AMG

Steps towards GPU accelerated aggregation AMG

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2012 11th International Symposium on parallel and distributed Computing, ISPDC 2012

作者： Emans, Maximilian Liebmann, Manfred Basara, Branislav Johann Radon Institute for Computational and Applied Mathematics IMCC GmbH 4040 Linz Austria Institute for Mathematics and Scientific Computing University of Graz 8010 Graz Austria AVL GmbH Advanced Simulation Technology 8020 Graz Austria

ISBN: (纸本)9780769548050

We present an implementation of AMG with simple aggregation techniques on multiple GPUs. It supports the parallel matrix representations typically used for finite volume discretisation. We employ the ICRS sparse matrix format and the asynchronous exchange mechanism of MPI on CPUs that has been modified to make it suitable for the GPU coprocessors. We show that the solution phase of the standard v-cycle AMG with simple aggregation is accelerated by a factor of up to 12. the solution phase of the more advanced Krylov-accelerated AMG runs faster by a factor of up to 7 on Nvidia TESLA C2070 compared to calculation on Intel X5650 CPUs. © 2012 IEEE.

关键词： Program processors

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Model-based Analysis of Serverless Applications 11

Model-based Analysis of Serverless Applications

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11th IEEE/ACM International workshop on Modelling in Software Engineering (MiSE)

作者： Winzinger, Stefan Wirtz, Guido Univ Bamberg Distributed Syst Grp Bamberg Germany

ISBN: (纸本)9781728122311

Serverless computing is a relatively new execution model where the cloud platform provider manages the allocation of resources for containerized functions dynamically. this evolving paradigm is called Function as a Service (FaaS). the statelessness of these functions enables the application to be scaled up elastically in the case of peak loads. they can be tested easily in isolation, but the behavior arising by integrating them to an application is both hard to predict and test. the parallel execution of the functions and the shift of its state to data storages can cause several workflows accessing the same data. these workflows are hard to detect, particularly for complex applications. therefore, we suggest an approach for modelling an existing serverless application based on a specialized graph holding all relevant features. Our serverless-specific model can be applied during the whole life cycle of a complex application and offers a good basis for this specific class of applications. It helps to optimize an existing system by identifying hot spots, supports the generation of test cases and can be used to monitor an existing system. Furthermore, we show how the generation of the model can be automated by realizing a tool supporting Amazon's AWS Lambda.

关键词： serverless computing FaaS dependency graph model-driven testing integration testing cloud functions

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