检索结果-内蒙古大学图书馆

An Innovative Teaching Strategy to Understand High-Performance systems through Performance Evaluation

Procedia computer Science 2012年 9卷 1733-1742页

作者： Gonzalo Zarza Diego Lugones Daniel Franco Emilio Luque Computer Architecture and Operating Systems Department Universitat Autónoma de Barcelona Spain

Nowadays, the study of high-performance computing (HPC) is one of the essential aspects of postgraduate pro-grammes in Computational Science. However, university education in HPC often suffers from a significant gap between theoretical concepts and the practical experience of students. To face this challenge, we have implemented an innovative teaching strategy to provide students appropriate resources to ease the assimilation of theoretical con-cepts, while improving their practical experience through the use of teaching tools and resources specifically designed to promote active learning. We have used the proposed strategy to organize the module of Parallel computers and architectures of the Master's in High-Performance Computing, at the Universitat Aut‘onoma de Barcelona, obtaining very promising results. In particular, we have observed improvements of both the academic marks of students and the perception about their own expertise and skills in HPC, regarding the previous teaching approach.

关键词： University Education High-Performance Computing Simulation Management OPNET Modeler

来源：评论

学校读者我要写书评

暂无评论

Large Forest Fire Spread Prediction: Data and Computational Science

引用

Procedia computer Science 2016年 80卷 909-918页

作者： Tomàs Artés Ana Cortés Tomàs Margalef Computer Architecture and Operating Systems Department Universitat Autònoma de Barcelona Spain

The accurate prediction of forest fire propagation is a crucial issue to minimize its effects. So, several models have been developed to determine the forest fire propagation beforehand. Such models require several input parameters that, in some cases, cannot be known precisely in a real emergency. So, a Two-Stage methodology was developed to calibrate the input parameters to improve the quality of the prediction. This methodology was based on Genetic Algorithms which require the execution of many simulations. Moreover, when the fire is large some input parameters cannot be considered uniform among the whole fire and extra models must be introduced. One of these non-uniform parameters is wind. So, in this work a wind field model is introduced. This model implies more computation time and response time is the main constraint. The prediction must be provided as fast as possible to be useful, thus it is necessary to exploit all available computing resources. So a Hybrid MPI-OpenMP application has been developed to reach a response in the shortest possible time. This work focuses on reducing the execution time of a worker in a MPI Master/Worker structure analyzing the simulation software parts which compose the Fire Simulator System.

关键词： error function forest fire simulation

来源：评论

学校读者我要写书评

暂无评论

High performance individual-oriented simulation using complex models

引用

Procedia computer Science 2010年第1期1卷 447-456页

作者： Roberto Solar Remo Suppi Emilio Luque Computer Architecture and Operating Systems Department (CAOS) University Autonoma of Barcelona Barcelona Spain

Computational simulation has been used as a powerful tool to represent the dynamical behavior of systems based on complex analytic models. These types of models have two main drawbacks: (a) limitations due to the degree of abstraction needed to simulate them, (b) high computing power to simulate a heavily simplified models. The computing power available today can overcome these limitations to perform quicker simulations of complex models that are closer to reality. In this paper, the experiments and performance analysis of a distributed simulation for a complex individual oriented model (fish schools) are presented. The development of the fish school simulator includes the possibility of working with large models that include large numbers of fish (>10 6 of individuals), predators and obstacles in the simulated world.

关键词： High performance simulation Individual-oriented models Fish school Complex models

来源：评论

学校读者我要写书评

暂无评论

Error Function Impact in Dynamic Data-driven Framework Applied to Forest Fire Spread Prediction

引用

Procedia computer Science 2016年 80卷 418-427页

作者： Carlos Carrillo Tomàs Artés Ana Cortés Tomàs Margalef Computer Architecture and Operating Systems Department Universitat Autònoma de Barcelona Spain

In order to use environmental models effectively for management and decision-making, it is vital to establish an appropriate measure of confidence in their performance. There are different ways and different methodologies to establish and measure the confidence of the models. In this paper, we focus on the forest fire spread prediction. Simulators implementing forest fire spread models require diverse input parameters to deliver predictions about fire propagation. However, the data describing the actual scenario where the fire is taking place are usually subject to high levels of uncertainty. In order to minimize the impact of the input-data uncertainty a Two-Stage methodology was developed to calibrate the input parameters in (1) an adjustment stage so that the calibrated parameters are used, and (2) the prediction stage to improve the quality of the predictions. Is in the adjustment stage where the error formula plays a crucial role, because different formulas implies different adjustments and, in consequence, different wild fire spread predictions. In this paper, different error functions are compared to show the impact in terms of prediction quality in DDDAS for forest fire spread prediction. These formulas have been tested using a real forest fire that took place in Arkadia (Greece) in 2011.

关键词： error function forest fire simulation FARSITE

来源：评论

学校读者我要写书评

暂无评论

Application of self-organizing systems in power systems control

Application of self-organizing systems in power systems cont...

引用

13th International Conference on Product-Focused Software Process Improvement, PROFES 2012

作者： Müller, Sven C. Häger, Ulf Rehtanz, Christian Wedde, Horst F. Institute of Energy Systems Energy Efficiency and Energy Economics TU Dortmund University of Technology Dortmund Germany Department of Operating Systems and Computer Architecture TU Dortmund University of Technology Dortmund Germany

ISBN: (纸本)9783642310621

The European electrical transmission network is operated increasingly close to its operational limits due to market integration and increased feed-in by renewable energies. For this reason, innovative solutions for a reliable, secure and efficient network operation are requested. The application of self-organizing systems promises significant potential in real-time control. This paper outlines the challenges of power system operation, gives a brief overview of relevant system characteristics and discusses the applicability of self-organizing systems for different fields of power system control. As a result of current research, the application of an agent-based decentralized power flow control system is presented and discussed in comparison to current practice based on central decision making. © 2012 Springer-Verlag.

关键词： Flexible AC transmission systems

来源：评论

学校读者我要写书评

暂无评论

Agent-based model for tumor-analysis using Python+Mesa 30

Agent-based model for tumor-analysis using Python+Mesa

引用

30th European Modeling and Simulation Symposium, EMSS 2018

作者： Tashakor, Ghazal Suppi, Remo Universitat Autònoma de Barcelona Department Computer Architecture and Operating Systems School of Engineering Campus Bellaterra Cerdanyola del Vallès Barcelona08193 Spain

ISBN: (纸本)9788885741065

The potential power provided and possibilities presented by computation graphs has steered most of the available modeling techniques to re-implementing, utilization and including the complex nature of System Biology (SB). To model the dynamics of cellular population, we need to study a plethora of scenarios ranging from cell differentiation to tumor growth and etcetera. Test and verification of a model in research means running the model multiple times with different or in some cases identical parameters, to see how the model interacts and if some of the outputs would change regarding different parameters. In this paper, we will describe the development and implementation of a new agent-based model using Python. The model can be executed using a development environment (based on Mesa, and extremely simplified for convenience) with different parameters. The result is collecting large sets of data, which will allow an in-depth analysis in the microenvironment of the tumor by the means of network analysis. © Institute of Information Science. All rights reserved.

关键词： Python

来源：评论

学校读者我要写书评

暂无评论

Simulation and analysis of a multi-scale tumor model using agent clustered network 18

Simulation and analysis of a multi-scale tumor model using a...

引用

18th International Conference on Modeling and Applied Simulation, MAS 2019

作者： Tashakor, Ghazal Suppi, Remo Universitat Autónoma de Barcelona Department Computer Architecture and Operating Systems School of Engineering Campus Bellaterra Cerdanyola del Vallès Barcelona08193 Spain

ISBN: (纸本)9788885741300

The increasing application of network models to translate and analysis of biological systems discusses the necessity of novel methodological and informatics insights for dealing with biological complexity. Today, using tools from graph theory to simulate the dynamical system and to understand the behavior of a biological network system such as tumor growth is unavoidable. Perhaps the most significant level of network analysis comes from mining the network measures and configuration data which allow us to explore deeper in multi-scale and multi-level biological models. This paper presents a graph agent-based tumor model which allows us to mine network measures and visualizing the evolving behavior of tumor in molecular and cellular levels. Besides, in this paper, we have applied three applicable techniques to discover and classify subgraphs in a growing network of agents for the use of a cluster computing system. © Modeling and Applied Simulation, MAS *** Rights Reserved.

关键词： Computational methods

来源：评论

学校读者我要写书评

暂无评论

Towards policies for data insertion in dynamic data driven application systems: a case study sudden changes in wildland fire

引用

Procedia computer Science 2010年第1期1卷 1267-1276页

作者： Roque Rodríguez Ana Cortés Tomás Margalef Computer Architecture and Operating Systems Department Universitat Autónoma de Barcelona Bellaterra Spain

We have applied the Dynamic Data Driven Application System (DDDAS) methodology to predict wildfire propagation. Our goal is to build a system that dynamically adapts to sudden changes in environmental conditions. For this purpose, we are building a parallel wildfire prediction method, which is able to assimilate real-time data to be injected in the prediction process at execution time. This data-injection needs to be intelligent in order noy to disturb the simulation process outputs. In this paper, we propose a policy for data insertion using a statistical approach and we design a set of experiments based on California wildfire where Santa Ana winds generate the ideal conditions for sudden changes in fire behavior.

关键词： Dynamic data driven application system Parallel computing Forest fire prediction HPC Evolutionary computing Data insertion policy

来源：评论

学校读者我要写书评

暂无评论

A Hybrid MPI+OpenMP Solution of the Distributed Cluster-based Fish Schooling Simulator

引用

Procedia computer Science 2014年 29卷 2111-2120页

作者： Francisco Borges Albert Gutierrez-Milla Remo Suppi Emilio Luque Department of Computer Architecture & Operating Systems Universitat Autonoma de Barcelona Bellaterra08193 Barcelona Spain

Exploring the multi-core architecture is an important issue to obtaining high performance in parallel and distributed discrete-event simulations. However, the simulation features must fit on parallel programming model in order to increase the performance. In this paper we show our experience developing a hybrid MPI+OpenMP version of our parallel and distributed discrete- event individual-oriented fish schooling simulator. In the hybrid approach developed, we fit our simulation features in the following manner: the communication between the Logical Processes happens via message passing whereas the computing of the individuals by OpenMP threads. In addition, we propose a new data structure for partitioning the fish clusters which avoid the critical section in OpenMP code. As a result, the hybrid version significantly improves the total execution time for huge quantity of individuals, because it decreases both the communication and management of processes overhead, whereas it increases the utilization of cores with sharing of resources.

关键词： Parallel and distributed simulation Parallel discrete-event simulation High performance distributed simulation Individual-oriented Model Hybrid MPI+OpenMP parallel programming

来源：评论

学校读者我要写书评

暂无评论

Recent Advances in Parallel Virtual Machine and Message Passing Interface 1

引用

丛书名： Lecture Notes in computer Science

1000年

作者： Jack Dongarra Emilio Luque Tomàs Margalef

ISBN: (数字)9783540481584

ISBN: (纸本)9783540665496

Parallel Virtual Machine (PVM) and Message Passing Interface (MPI) are the most frequently used tools for programming according to the message passing paradigm, which is considered one of the best ways to develop parallel applications. This volume comprises 67 revised contributions presented at the Sixth European PVM/MPI Users' Group Meeting, which was held in Barcelona, Spain, 26-29 September 1999. The conference was organized by the computer Science department of the Universitat Autònoma de Barcelona. This conference has been previously held in Liverpool, UK (1998) and Cracow, Poland (1997). The first three conferences were devoted to PVM and were held at the TU Munich, Germany (1996), ENS Lyon, France (1995), and University of Rome (1994). This conference has become a forum for users and developers of PVM, MPI, and other message passing environments. Interaction between those groups has proved to be very useful for developing new ideas in parallel computing and for applying some of those already existent to new practical fields.

关键词： computer System Implementation Processor architectures

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：