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2011 International Conference on Advanced Materials and computer Science(ICAMCS 2011)

作者： WANG Yan-en CHEN Yao XING Xue School of Mechatronics Northwestern Polytechnical University Xi'an China Dept.Design Manufacture & Engineering ManagementUniversity of Strathclyde School of Management Xi'AN University of Architecture and Technology Xi'an China Department of Computer Science Shangluo University

The author has designed a framework for building web sites using Microsoft'sNET technologyThe framework employs a design approach based upon the Model View Controller(MVC) design patternA framework in an object or... 详细信息

关键词： framework NET MVC

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Trainbow: a new trusted virtual machine based platform

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中国高等学校学术文摘·计算机科学 2010年第1期4卷 47-64页

作者： Yuzhong SUN Yongbing HUANG Yunwei GAO Haifeng FANG Ying SONG Lei DU Kai ZHANG Hongyong ZANG Yaqiong LI Yajun YANG Ran AO Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China Graduate University of Chinese Academy of Sciences Beijing 100190China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China Graduate University of Chinese Academy of Sciences Beijing 100190China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China Department of Computer Science and Technology Xi'an Jiaotong University Xi'an 710049China Key Laboratory of Computer System and Architecture Institute of Computing TechnologyChinese Academy of Sciences Beijing 100190China Graduate University of Chinese Academy of Sciences Beijing 100190China

Currently, with the evolution of virtualization technology, cloud computing mode has become more and more popular. However, people still concern the issues of the runtime integrity and data security of cloud computing platform, as well as the service efficiency on such computing platform. At the same time, according to our knowledge, the design theory of the trusted virtual computing environment and its core system software for such network-based computing platform is at the exploratory stage. In this paper, we believe that efficiency and isolation are the two key proprieties of the trusted virtual computing environment. To guarantee these two proprieties, based on the design principle of splitting, customizing, reconstructing, and isolation-based enhancing to the platform, we introduce TRainbow, a novel trusted virtual computing platform developing by our research *** the two creative mechanisms, that is, capacity flowing amongst VMs and VM-based kernel reconstructing, TRainbow provides great improvements (up to 42%) in service performance and isolated reliable computing environment for Internet-oriented, large-scale, concurrent services.

关键词： Computing platform virtual machine capacity service computing trust chain isolation

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Scheduling multiple sinks in wireless sensor networks: A column generation based approach

Scheduling multiple sinks in wireless sensor networks: A col...

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IEEE Conference on Wireless Communications and Networking

作者： Yu Gu Baohua Zhao Yusheng Ji Jie Li Information Systems Architecture Science Research Division National Institute of Information Tokyo Japan State Key Laboratory of Networking and Switching Technology Beijing China Department of Computer Science Tsukuba Science City University of Tsukuba Ibaraki Japan

We address the optimal sink scheduling problem in wireless sensor networks (WSNs). The problem is inherently difficult since sink scheduling and data routing are tightly coupled. Previous approaches either have questionable performance due to no joint considerations, or are based on relaxed constraints. Our aim is to fill in this blank in the research. First, by discretizing continuous time, we develop a novel bound technique to connect time-varying routes with the placement of sinks. This bounding technique transforms time-related constraints into pattern-based ones and allows us to mathematically formulate this optimization in a pattern-based way. The complexity of directly solving this optimization is intractable; therefore, on the basis of column generation (CG), a computationally efficient algorithm is developed to reduce the complexity by decomposing the problem into sub-problems and iteratively solving them to approach optimality. Simulations demonstrate the efficiency of the algorithm and substantiate the importance of sink mobility in energy-constrained sensor networks.

关键词： Wireless sensor networks Optimization Relays Routing Processor scheduling Complexity theory USA Councils

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Hardware Reuse in Modern Application-Specific Processors and Accelerators

Hardware Reuse in Modern Application-Specific Processors and...

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Euromicro Symposium on Digital System Design

作者： Alexandre S. Nery Lech Jozwiak Menno Lindwer Mauro Cocco Nadia Nedjah Felipe M.G. Franca LAM-Computer Architecture and Microelectronics Laboratory Systems Engineering and Computer Science Program COPPE Universidade Federal do Rio de Janeiro Brazil Department of Electrical Engineering-Electronic Systems Eindhoven University of Technology Netherlands Silicon Hive-Intel UMG Netherlands Department of Electronics Engineering and Telecommunications-Faculty of Engineering Universidade do Estado do Rio de Janeiro Brazil

Effective exploitation of the application-specific parallel patterns and computation operations through their direct implementation in hardware is the base for construction of high-quality application-specific (re-)configurable application specific instruction set processors (ASIPs) and hardware accelerators for modern highly-demanding applications. Although it receives a lot of attention from the researchers and practitioners, a very important problem of hardware reuse in ASIP and accelerator synthesis is clearly underestimated and does not get enough attention in the published research. This paper is an effect of an industry and academic collaborative research. It analyses the problem of hardware sharing, shows its high practical relevance, as well as a big influence of hardware sharing on the major circuit and system parameters, and its importance for the multi-objective optimization and tradeoff exploitation. It also demonstrates that the state-of-the-art synthesis tools do not sufficiently address this problem and gives several guidelines related to enhancement of the hardware reuse.

关键词： Hardware Resource management computer architecture Optimization Program processors Adders Delay

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Ambient living activity recognition based on feature-set ranking using intelligent systems

Ambient living activity recognition based on feature-set ran...

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2010 6th IEEE World Congress on Computational Intelligence, WCCI 2010 - 2010 International Joint Conference on Neural Networks, IJCNN 2010

作者： Baños, Oresti Pomares, Héctor Rojas, Ignacio Department of Computer Architecture and Computer Technology University of Granada Granada 18071 Spain

ISBN: (纸本)9781424469178

E-health and e-monitoring have become an increasingly important area during recent years, being the recognition of motion, postures and physical exercises one of the main topics. In this kind of problem is common to work with a huge training data set in a multidimensional space, so feature selection is absolutely necessary. Most works are based on knowledge extraction using features which permit to make decisions about the activity realized, being feature selection the most critical stage. Conventional feature selection procedures based on wrapper methods or 'branch and bound' are highly computationally expensive. In this work, we propose an alternative filter method using a feature-set ranking via a couple of two statistical criteria, which achieves remarkable accuracy rates in the classification process. We demonstrate the usefulness of our method on both laboratory and seminaturalistic activity ambient living datasets for real problems. © 2010 IEEE.

关键词： Feature Selection

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Sensor placement for activity recognition: Comparing video data with motion sensor data

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International Journal of Circuits, Systems and Signal Processing 2011年第3期5卷 279-286页

作者： Yanik, Paul M. Merino, Jessica Manganelli, Joe Smolentzov, Linnea Walker, Ian D. Brooks, Johnell O. Green, Keith E. Electrical and Computer Engineering Technology Western Carolina University Cullowhee NC United States Intelligent Systems Clemson University Clemson SC United States Auburn University United States Human Factors Program Clemson University Clemson SC United States Department of Psychology Clemson University Clemson SC United States Architecture and Electrical and Computer Engineering Institute for Intelligent Materials Systems and Environments Clemson University United States

The development of ubiquitous sensing strategies in home environments underpins the promise of adaptive architectural design, assistive robotics, and services which would support a person's ability to live independently as they age. In particular, the ability to infer the actions and behavioral patterns of an individual from sensor data is key to effective design of such components for aging in place. Frequently, activity recognition is accomplished using vision based sensors. The method employed in this paper makes use of self similarities in a video motion sequence to construct a descriptor of the activity in the form of a Histogram of Oriented Gradients (HOG). Descriptors are used as exemplars for classification and are shown to accurately identify motion video recorded from other views. Three candidate motions were performed using a PUMA robot (for repeatability). Video of each motion was recorded from an array of vantage points on the surface of a virtual sphere surrounding the workspace of the robot. This method is then extended to non-video motion sensor data collected from the same set of points. Results show that mean HOGs generated from Self Similarity Matrices may serve as effective exemplars to classify motions in both video and non-video formats. Video data provides superior classification results. However, motion sensor data offers a less intrusive option with promising accuracy especially when multiple sensors outputs are fused to form aggregate readings.

关键词： Video recording

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一种静态漏电与NBTI效应协同优化模型

一种静态漏电与NBTI效应协同优化模型

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第七届中国测试学术会议

作者： Jin Song 靳松 Hart Yinhe 韩银和 Liu Li 刘立 Department of Electronic and Communication Engineering School of Electrical and Electronic Engineer 华北电力大学电气与电子工程学院电子与通信工程系保定071003 State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of 中国科学院计算技术研究所计算机体系结构国家重点实验室北京100190

随着制造工艺的不断进步，老化效应导致的动态参数偏差和漏电给集成电路的可靠性带来了严峻挑战。目前关于电路老化和漏电的协同优化方法或者以侵入式方法实现，或者采用输入向量控制方法(IVC)。然而，侵入式方法会增加设计复杂度，并... 详细信息

随着制造工艺的不断进步，老化效应导致的动态参数偏差和漏电给集成电路的可靠性带来了严峻挑战。目前关于电路老化和漏电的协同优化方法或者以侵入式方法实现，或者采用输入向量控制方法(IVC)。然而，侵入式方法会增加设计复杂度，并引入较大的时延和面积开销;而IVC方法则会随着电路规模的增大逐渐失去其优化效果。本文提出了一个新的协同优化模型以最小化电路处于待机模式时由于NBTI效应导致的时延偏差和静态漏电。提出的协同优化模型将NBTI效应导致的时延偏差和电路的平均静态漏电统一模型化为占空比的函数。将此模型应用于非线性规划中可以识别出电路处于待机模式时内部节点上的最优占空比集合。提出的协同优化模型通过一个多输入向量控制方法进行验证。实验结果表明，提出的模型可以有效地应用于NBTI效应和电路静态漏电的协同优化中。

关键词：集成电路负偏置温度不稳定性静态漏电协同优化模型

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Statistical analysis of parameter setting in real-coded evolutionary algorithms

Statistical analysis of parameter setting in real-coded evol...

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11th International Conference on Parallel Problem Solving from Nature, PPSN 2010

作者： Arenas, Maria I. García Valdivieso, Pedro Ángel Castillo García, Antonio M. Mora Guervós, Juan J. Merelo Laredo, Juan L. Jiménez García-Sánchez, Pablo Department of Architecture and Computer Technology University of Granada Spain

ISBN: (纸本)3642158706

When evolutionary algorithm (EA) applications are being developed it is very important to know which parameters have the greatest influence on the behavior and performance of the algorithm. This paper proposes using the ANOVA (ANalysis Of the VAriance) method to carry out an exhaustive analysis of an EA method and the different parameters it requires, such as those related to the number of generations, population size, operators application and selection type. When undertaking a detailed statistical analysis of the influence of each parameter, the designer should pay attention mostly to the parameter presenting values that are statistically most significant. Following this idea, the significance and relative importance of the parameters with respect to the obtained results, as well as suitable values for each of these, were obtained using ANOVA on four well known function optimization problems. © 2010 Springer-Verlag.

关键词： Evolutionary algorithms

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Fault tolerant PVFS2 based on data replication

Fault tolerant PVFS2 based on data replication

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2010 1st International Conference on Parallel, Distributed and Grid Computing, PDGC - 2010

作者： Nieto, Erik Camacho, Hugo E. Anguita, Mancia Díaz, Antonio F. Ortega, Julio Department of Computer Architecture and Technology University of Granada Spain

ISBN: (纸本)9781424476725

Aggregating the capacity and bandwidth of the commodity disks in the nodes of a cluster provides cost effective and high performance storage systems. Nevertheless, this strategy could be a feasible approach only if the mean time to failure of disks and nodes is faced. The number of failures increases with the nodes and it is especially important in parallel file systems, like PVFS, because having a file striped over server disks increases the probability of failures. This work proposes a strategy to include data replication in the second version of PVFS in order to provide fault tolerance. We also analyze the performance of the implementation of this approach. © 2010 IEEE.

关键词： HPSS

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Client cache for PVFS2

Client cache for PVFS2

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2010 1st International Conference on Parallel, Distributed and Grid Computing, PDGC - 2010

作者： Camacho, Hugo E. Nieto, Erik Anguita, Mancia Díaz, Antonio F. Ortega, Julio Department of Computer Architecture and Technology University of Granada Spain

ISBN: (纸本)9781424476725

Engineering and scientific applications usually require to manage large quantities of data with different programs. The I/O demands of these applications get higher as they get larger because processor and memory speed increase. In order to improve performance and make programming much easier these applications can use parallel file systems. The relation between performance and easiness of programming can be additionally improved by using caches in clients. PVFS is a free parallel file system developed by a multi-institution team of parallel I/O, networking and storage experts. This work proposes a cache in the second version of PVFS in order to improve performance of data-intensive applications with several programs and to improve performance in a parallel program without modifying it to take advantage of the several cores in a processor. We analyze the performance of the cache implementation. © 2010 IEEE.

关键词： File organization

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