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2012 International Conference on High Performance Computing & Simulation (HPCS)最新文献

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On some mathematical aspects of data protection in cloud computing 论云计算中数据保护的一些数学方面
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266894
V. Ustimenko
The talk is dedicated to ideas of Holomorphic Encryption and Multivariate Key Dependent Cryptography. We observe recent theoretical results on the mentioned above topics together with their Applications to Cloud Security. Post Quantum Cryptography could not use many security tools based on Number Theory, because of the factorization algorithm developed by Peter Shor. This fact and fast development of Computer algebra make multivariate cryptography an important direction of research. The idea of key dependent cryptography looks promising for applications in Clouds, because the size of the key allows to control the speed of execution and security level. We will discuss recent results on key dependent multivariate cryptography. Finally, special classes of finite rings turned out to be very useful in holomorphic encryption and for the development of multivariate key dependent algorithms.
本讲座主要讨论全纯加密和多变量依赖密钥加密的思想。我们观察了上述主题的最新理论成果及其在云安全中的应用。由于Peter Shor提出的因式分解算法,后量子密码不能使用许多基于数论的安全工具。这一事实和计算机代数的快速发展使多元密码学成为一个重要的研究方向。依赖于密钥的加密技术看起来很适合云中的应用程序,因为密钥的大小允许控制执行速度和安全级别。我们将讨论依赖密钥的多变量密码学的最新成果。最后,有限环的特殊类在全纯加密和多元密钥依赖算法的发展中被证明是非常有用的。
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引用次数: 4
Complex dynamics in life-like rules described with de Bruijn diagrams: Complex and chaotic cellular automata 用德布鲁因图描述的类生命规则中的复杂动力学:复杂和混沌元胞自动机
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266919
Paulina A. León, G. J. Martínez, S. V. C. Vergara
De Bruijn diagrams have been used as a useful tool for the systematic analysis of one-dimensional cellular automata (CA). They can be used to calculate particular kind of configurations, ancestors, complex patterns, cycles, Garden of Eden configurations and formal languages. However, there is few progress in two dimensions because its complexity increases exponentially. In this paper, we will offer a way to explore systematically such patterns by de Bruijn diagrams from initial configurations. Such analysis is concentrated mainly in two evolution rules: the famous Game of Life (complex CA) and the Diffusion Rule (chaotic CA). We will display some preliminary results and benefits to use de Bruijn diagrams in these CA.
德布鲁因图已被用作一维元胞自动机(CA)系统分析的有用工具。它们可以用来计算特定类型的构型、祖先、复杂模式、循环、伊甸园构型和形式语言。然而,由于其复杂性呈指数级增长,在二维领域的进展很少。在本文中,我们将提供一种方法,通过从初始配置的德布鲁因图系统地探索这种模式。这种分析主要集中在两个进化规则上:著名的生命博弈(复杂CA)和扩散规则(混沌CA)。我们将展示在这些CA中使用德布鲁因图的一些初步结果和好处。
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引用次数: 0
Cellular automata and other discrete dynamical systems with memory 元胞自动机及其他有记忆的离散动力系统
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266914
R. Alonso-Sanz
In conventional discrete dynamical systems, the new configuration depends solely on the configuration at the preceding time step. This contribution considers an extension to the standard framework of dynamical systems by taking into consideration past history in a simple way: the mapping defining the transition rule of the system remains unaltered, but it is applied to a certain summary of past states. This kind of embedded memory implementation, of straightforward computer codification, allows for an easy systematic study of the effect of memory in discrete dynamical systems, and may inspire some useful ideas in using discrete systems with memory (DSM) as a tool for modeling non-markovian phenomena. Besides their potential applications, DSM have an aesthetic and mathematical interest on their own, as will be briefly over viewed. The contribution focuses on the study of systems discrete par excellence, i.e., with space, time and state variable being discrete. These discrete universes are known as cellular automata (CA) in their more structured forms, and Boolean networks (BN) in a more general way. Thus, the mappings which define the rules of CA (or BN) are not formally altered when implementing embedded memory, but they are applied to cells (or nodes) that exhibit trait states computed as a function of their own previous states. So to say, cells (or nodes) - canalize - memory to the mapping. Automata on networks and on proximity graphs, together with structurally dynamic cellular automata, will be also studied with memory. If time permits, systems that remain discrete in space and time, but not in the state variable (e.g., maps and spatial games), will be also scrutinized with memory. A list of references on DSM may be found in http://uncomp.uwe.ac.uk/alonso-sanz.
在传统的离散动力系统中,新的组态完全依赖于前一个时间步长的组态。这一贡献通过以一种简单的方式考虑过去的历史,考虑了对动力系统标准框架的扩展:定义系统转换规则的映射保持不变,但它被应用于过去状态的某种总结。这种嵌入式存储器实现,直接的计算机编码,允许对离散动力系统中存储器的影响进行简单的系统研究,并可能在使用具有存储器的离散系统(DSM)作为建模非马尔可夫现象的工具方面激发一些有用的想法。除了潜在的应用之外,DSM本身也具有美学和数学方面的意义,下面将简要介绍一下。贡献集中在离散系统的研究,即空间,时间和状态变量是离散的。这些离散的宇宙以其更结构化的形式被称为细胞自动机(CA),以更一般的方式被称为布尔网络(BN)。因此,定义CA(或BN)规则的映射在实现嵌入式内存时不会被正式更改,但它们被应用于显示特征状态的单元(或节点),这些特征状态计算为它们自己先前状态的函数。也就是说,单元(或节点)将内存解析到映射。网络上的自动机和邻近图上的自动机,以及结构动态元胞自动机,也将与记忆一起研究。如果时间允许,在空间和时间上保持离散的系统,但不在状态变量中(如地图和空间游戏),也将被记忆仔细检查。有关DSM的参考资料列表可在http://uncomp.uwe.ac.uk/alonso-sanz找到。
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引用次数: 7
Active labeling: Application to wireless endoscopy analysis 主动标签:应用于无线内窥镜分析
Pub Date : 2012-07-02 DOI: 10.1109/HPCSIM.2012.6266908
P. Radeva, M. Drozdzal, S. Seguí, L. Igual, C. Malagelada, F. Azpiroz, Jordi Vitrià
Today, robust learners trained in a real supervised machine learning application should count with a rich collection of positive and negative examples. Although in many applications, it is not difficult to obtain huge amount of data, labeling those data can be a very expensive process, especially when dealing with data of high variability and complexity. A good example of such cases are data from medical imaging applications where annotating anomalies like tumors, polyps, atherosclerotic plaque or informative frames in wireless endoscopy need highly trained experts. Building a representative set of training data from medical videos (e.g. Wireless Capsule Endoscopy) means that thousands of frames to be labeled by an expert. It is quite normal that data in new videos come different and thus are not represented by the training set. In this paper, we review the main approaches on active learning and illustrate how active learning can help to reduce expert effort in constructing the training sets. We show that applying active learning criteria, the number of human interventions can be significantly reduced. The proposed system allows the annotation of informative/non-informative frames of Wireless Capsule Endoscopy video containing more than 30000 frames each one with less than 100 expert ”clicks”.
今天,在真正的监督机器学习应用程序中训练的健壮的学习者应该具有丰富的正面和负面示例集合。尽管在许多应用程序中,获取大量数据并不困难,但标记这些数据可能是一个非常昂贵的过程,特别是在处理高度可变性和复杂性的数据时。这种情况的一个很好的例子是来自医学成像应用的数据,其中在无线内窥镜中注释肿瘤、息肉、动脉粥样硬化斑块或信息框架等异常需要训练有素的专家。从医学视频(如无线胶囊内窥镜)中构建具有代表性的训练数据集意味着专家需要对数千帧进行标记。新视频中的数据不同,因此不能用训练集表示,这是很正常的。在本文中,我们回顾了主动学习的主要方法,并说明了主动学习如何帮助减少专家构建训练集的工作量。我们表明,应用主动学习标准,人工干预的数量可以显着减少。所提出的系统允许在少于100次专家“点击”的情况下,对每帧超过30000帧的无线胶囊内窥镜视频进行信息/非信息帧的注释。
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引用次数: 3
High level languages for efficient parallel programming 用于高效并行编程的高级语言
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266970
Sébastien Limet
Efficient parallel programming has always been very tricky and only expert programmers are able to take the most of the computing power of modern computers. Such a situation is an obstacle to the development of the high performance computing in other sciences as well as in the industry. The fast changes in the computer architecture (multicores, manycores, GPU, clusters, ...) make even more difficult, even for an experienced programmer, to remain at the forefront of these evolutions. On the other hand, a huge amount of work has been done to develop programming languages or libraries that tend to help the programmers to write parallel programs which are more or less efficient. The key point in this kind of research is to find a good balance between the simplicity of the programming and the efficiency of the resulting programs. Many approaches have been proposed but none really prevail over the others. This paper is a small overview of some directions that seem promising to both simplify parallel programming and produce very efficient programs.
高效的并行编程一直是非常棘手的,只有专业程序员才能利用现代计算机的大部分计算能力。这种情况不仅阻碍了高性能计算在其他科学领域的发展,也阻碍了高性能计算在工业界的发展。计算机体系结构(多核、多核、GPU、集群等)的快速变化使得即使是经验丰富的程序员也很难保持在这些发展的前沿。另一方面,大量的工作已经被用于开发编程语言或库,这些语言或库倾向于帮助程序员编写或多或少有效的并行程序。这类研究的关键是在编程的简单性和生成的程序的效率之间找到一个很好的平衡。提出了许多方法,但没有一种真正胜过其他方法。本文简要概述了一些似乎有希望既简化并行编程又产生非常高效程序的方向。
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引用次数: 0
The Intel® Many Integrated Core Architecture Intel®多集成核心架构
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266938
A. Duran, Michael Klemm
In recent years, an observable trend in High Performance Computing (HPC) architectures has been the inclusion of accelerators, such as GPUs and field programmable arrays (FPGAs), to improve the performance of scientific applications. To rise to this challenge Intel announced the Intel® Many Integrated Core Architecture (Intel® MIC Architecture). In contrast with other accelerated platforms, the Intel MIC Architecture is a general purpose, manycore coprocessor that improves the programmability of such devices by supporting the well-known shared-memory execution model that is the base of most nodes in HPC machines. In this presentation, we will introduce key properties of the Intel MIC Architecture and we will also cover programming models for parallelization and vectorization of applications targeting this architecture.
近年来,高性能计算(HPC)架构的一个明显趋势是包含加速器,如gpu和现场可编程阵列(fpga),以提高科学应用的性能。为了应对这一挑战,英特尔宣布了英特尔®多集成核心架构(英特尔®MIC架构)。与其他加速平台相比,英特尔MIC架构是一种通用的多核协处理器,它通过支持众所周知的共享内存执行模型(HPC机器中大多数节点的基础)来提高这些设备的可编程性。在本演讲中,我们将介绍英特尔MIC架构的关键特性,并将介绍针对该架构的应用程序的并行化和向量化编程模型。
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引用次数: 120
Parallel multigrid for electrokinetic simulation in particle-fluid flows 平行多重网格在颗粒流体流动中的电动力学模拟
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266940
D. Bartuschat, D. Ritter, U. Rüde
We present an algorithm for multi-physics simulation of charged particles in electrokinetic flows. It includes a coupled simulation of charged rigid particles in fluid flows in an electric field. The parallel simulation algorithm is implemented in the WALBERLA software framework. For solving the partial differential equation that models the electric potential, a cell-centered multigrid algorithm has been incorporated into the framework. After an introduction to the central concepts of WALBERLA, we describe the simulation setup and the simulation algorithm. Finally, we show the parallel scaling behavior of the algorithm on a high performance computer, with emphasis on the multigrid implementation.
我们提出了一种多物理场模拟带电粒子在电动流动中的算法。它包括带电刚性粒子在电场中流体流动的耦合模拟。并行仿真算法在WALBERLA软件框架下实现。为了求解模拟电势的偏微分方程,在框架中加入了以细胞为中心的多网格算法。在介绍WALBERLA的核心概念之后,我们描述了仿真设置和仿真算法。最后,我们展示了该算法在高性能计算机上的并行缩放行为,重点介绍了多网格的实现。
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引用次数: 10
Towards green P2P: Analysis of energy consumption in P2P and approaches to control 迈向绿色P2P: P2P的能源消耗分析及控制方法
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266934
Peiqing Zhang, B. Helvik
Nowadays, information and communication technology (ICT) has become more and more energy conscious. In this paper, we focus on peer-to-peer systems which contribute a major fraction of the Internet traffic. This paper proposes analytical models of energy consumption in P2P system. The model considers content pollution, the most common attack in P2P system, which has received little attention in previous work on green P2P. The analysis of the models shows that the popular sleep method in green computing potentially affects peer-to-peer performance. When the online time of clean copy holders is over cut, the system collapses. To find the balance between energy saving and system maintenance, the concept energy effectiveness is introduced. An approach for controlling energy consumption while keeping the system stable is suggested. We show that the whole system can be benefited if some warm-hearted and smart peers are willing to spend a little extra cost on energy, when most peers over cut their power on time. This approach can perfectly complement the popular sleep methods in green computing.
如今,信息和通信技术(ICT)越来越具有能源意识。在本文中,我们关注的是点对点系统,它贡献了互联网流量的主要部分。本文提出了P2P系统能耗分析模型。该模型考虑了P2P系统中最常见的攻击——内容污染,这在以往的绿色P2P研究中很少受到关注。模型分析表明,绿色计算中流行的睡眠方法可能会影响点对点性能。干净副本持有者在线时间过长,系统崩溃。为了在节能和系统维护之间找到平衡,引入了能效的概念。提出了在保持系统稳定的同时控制能耗的方法。我们的研究表明,当大多数节点按时过度断电时,如果一些热心和聪明的节点愿意花一点额外的能源成本,整个系统就会受益。这种方法可以完美地补充绿色计算中流行的睡眠方法。
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引用次数: 7
Hardware accelerator for self adaptive augmented reality systems 自适应增强现实系统的硬件加速器
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266927
T. Frikha, N. B. Amor, K. Loukil, Agnès Ghorbel, M. Abid, J. Diguet
The emergency of multimedia applications particularly in mobile embedded systems puts new challenges for the design of such systems. The major difficulty is the embedded system's reduced energy and computational resources that must be carefully used to execute complex application often in unpredictable environments. So the system architecture must be energy efficient and flexible enough to adapt resources to application requirements to manage the environment architectures and mobile's constraints. The augmented reality is a very promising 3D embedded multimedia application. It's based on the addition of specific 3D's animations on a video flow. In this paper, we describe our concept of flexible architecture and we give implementation results based on Pixel Shader Accelerator. This is the first step of the project and we compare various hardware and software implementation.
多媒体应用特别是移动嵌入式系统的兴起,对多媒体系统的设计提出了新的挑战。主要的困难是嵌入式系统的能量和计算资源的减少,这些资源必须谨慎地用于在不可预测的环境中执行复杂的应用程序。因此,系统架构必须节能且足够灵活,以便根据应用程序需求调整资源,以管理环境架构和移动设备的限制。增强现实是一种非常有前途的3D嵌入式多媒体应用。它基于在视频流上添加特定的3D动画。在本文中,我们描述了灵活架构的概念,并给出了基于Pixel Shader Accelerator的实现结果。这是项目的第一步,我们比较了各种硬件和软件的实现。
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引用次数: 0
A resource prediction model for virtualization servers 虚拟化服务器的资源预测模型
Pub Date : 2012-07-02 DOI: 10.1109/HPCSim.2012.6266990
Sayanta Mallick, Gaétan Hains, C. Deme
Monitoring and predicting resource consumption is a fundamental need when running a virtualized system. Predicting resources is necessary because cloud infrastructures use virtual resources on demand. Current monitoring tools are insufficient to predict resource usage of virtualized systems so, without proper monitoring, virtualized systems can suffer down time, which can directly affect cloud infrastructure. We propose a new modelling approach to the problem of resource prediction. Models are based on historical data to forecast short-term resource usages. We present here in detail three of our prediction models to forecast and monitor resources. We also show experimental results by using real-life data and an overall evaluation of this approach.
监控和预测资源消耗是运行虚拟化系统时的基本需求。预测资源是必要的,因为云基础设施按需使用虚拟资源。当前的监控工具不足以预测虚拟化系统的资源使用情况,因此,如果没有适当的监控,虚拟化系统可能会出现停机,从而直接影响云基础设施。针对资源预测问题,提出了一种新的建模方法。模型基于历史数据来预测短期的资源使用情况。我们在这里详细介绍我们的三个预测模型来预测和监测资源。我们还通过使用实际数据和对该方法的总体评估来展示实验结果。
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引用次数: 19
期刊
2012 International Conference on High Performance Computing & Simulation (HPCS)
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