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Indexing Source Descriptions based on Defined Classes 10

Indexing Source Descriptions based on Defined Classes

引用

14th international Database engineering and Applications symposium (IDEAS)

作者： Lange, Ralph Duerr, Frank Rothermel, Kurt Inst Parallel & Distributed Syst Univ Str 38 D-70569 Stuttgart Germany

ISBN: (纸本)9781605589008

Scaling heterogeneous information systems (HIS) to thousands of sources poses particular challenges to source discovery. It requires a powerful formalism for describing the contents of the sources in a concise manner and for formulating compatible queries as well as a suitable structure for indexing and retrieving the source descriptions efficiently. We propose an extended logic-based description formalism for large-scale HIS with structured sources and a shared ontology. The formalism refines existing approaches that describe the sources by constraints on the attribute value ranges in several ways: It allows for complex, nested descriptions based on defined classes. It supports alternative descriptions to express that a source may be discovered by different combinations of constraints. Finally, it allows to adjust between positive matching, similar to keyword-based discovery, and negative matching, as used in existing logic-based approaches. We further propose the SDC-Tree for indexing such source descriptions. To allow for efficient discovery, the SDC-Tree features multidimensional indexing capabilities for the different attributes and the IS-A hierarchy of the shared ontology, but also incorporates the existence or absence of constraints. For this purpose, it supports three different types of node split operations which exploit the expressiveness of the description formalism. Therefore, we also propose a generic split algorithm which can be used with arbitrary ontologies.

关键词： Heterogeneous information systems source descriptions indexing of source descriptions defined classes tree-based index structure

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Research of optimal control of 3-phase integrating magnetic VRM based on state variable feedback linearization control method

Research of optimal control of 3-phase integrating magnetic ...

引用

2nd international symposium on Power Electronics for distributed Generation systems, PEDG 2010

作者： Yang, Yu-Gang Fu, Cai Hongzhu, Li College of Electrical and Control Engineering Liaoning Technical University Huludao 12510 China

ISBN: (纸本)9781424456703

The application of planar integrated magnetic in the traditional multi-phase interleaving parallel voltage regulator module (VRM) make it towards the direction of low voltage and large current and "short, small, light, thin",however, the magnetic coupling between each phase of the magnetic circuit complicates the work of the planar integrating VRM,and complicates the control methods considerably. This paper obtains the nonlinear decoupled control law of 3-phase integrating magnetic non-isolated VRM by differential geometry and passivity control treory. Firstly, the work state of 3-phase integrating magnetic VRM is analyzed to set up the three input and three output nonlinear model, and then the state variable feedback linearization control model of 3-phase integrating magnetic VRM is given based on the differential geometry and passivity control treory and considering the impact of system dynamic response on the weight coefficient. At last, the simulation results show the performance on dynamic and steady state of integrating magnetic VRM is good based on the state variable feedback linearization and passivity control. © 2010 IEEE.

关键词： Magnetic couplings

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A fault-tolerant strategy for improving the reliability of service composition

A fault-tolerant strategy for improving the reliability of s...

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10th international Conference on Quality software, QSIC 2010

作者： Yu, Huiqun Fan, Guisheng Chen, Liqiong Liu, Dongmei Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 201112 China Department of Computer Science and Information Engineering Shanghai Institute of Technology Shanghai 200235 China

ISBN: (纸本)9780769541310

Service composition is an important means for integrating the individual Web services for creating new value added systems that satisfy complex demands. Since, Web services exist in the heterogeneous environments on the Internet, study on how to guarantee the reliability of service composition in a distributed, dynamic and complex environment becomes more and more important. This paper proposes a service composition net(SCN) and fault-tolerant strategy to improve the reliability of service composition. The strategy consists of static strategy, dynamic strategy and exception handling mechanism, which can be used to dynamically adjust component service for achieving good reliability as well as good overall performance. SCN is adopted to model different components of service composition. The fault detection and fault recovery mechanisms are also considered. Based on the constructed model, theories of Petri nets help prove the consistency of processing states and the effectiveness of the strategy. A case study of Export Service illustrates the feasibility of proposed method. © 2010 IEEE.

关键词： Web services

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Applying agent-based negotiation approach for parallel machine scheduling with preference of machines

Applying agent-based negotiation approach for parallel machi...

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40th international Conference on Computers and Industrial engineering, CIE40 2010

作者： Liao, Li-Man Huang, Ching-Jen Industrial Engineering and Management National Chin-Yi University of Technology Taichung County 41101 Taiwan

ISBN: (纸本)9781424472956

The electro-etching process is the critical process in the production of aluminum foil. The manufacturing process has many parallel machines with three distinct voltage equipments. Therefore, the production scheduling is parallel-machine and its choices of eligibility. In this paper, an agent-based negotiation approach is proposed to develop a distributed parallel-machine scheduling application in this manufacturing environment. The agent-based system comprises three types of agents, job agents, machine agents and management agent, to represent jobs, machines and supervisor respectively. To establish job allocations, job agents and machine agents have to bid interactively. A negotiation protocol is developed for negotiations between job agents and machine agents. And management agent is added, and plays as a centralized controller and a system coordinator. The main function of management agent is to manage negotiations between job agents and machine agents to ensure that the global objectives of system primary are being observed. It is possible to consider one or several different global objectives such as minimizing total jobs' tardiness and flow time, balancing machines' loading, and maximizing total revenue. This paper will provide an integrated agent-based parallel eligible machines scheduling solution with a better global performance.

关键词： software agents

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Study for performance benchmark of bank intermediary business on high-performance fault-tolerant computers

Study for performance benchmark of bank intermediary busines...

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IEEE international symposium on parallel and distributed Processing With Applications

作者： Li, Bo Zhou, Haiying Zuo, Decheng Zhang, Zhan School of Computer Science and Technology Harbin Institute of Technology Harbin China

ISBN: (纸本)9780769541907

The dominant position of High-Performance Fault-Tolerant (HPFT) computers in security and economics has advanced the studies on the performance benchmarks on the HPFT computers in the specific field, such as bank finance and telecommunication etc. Although TPC (Transaction Processing Council) has proposed some benchmarks models for different OLTP (On-Line Transaction Processing) complex business, such as TPC-C and TPC-E, there is still a lack of the performance benchmark model dedicated to the bank intermediary business on HPFT computers. This paper proposes a Bank Intermediary Business performance benchmark (BIBbench), and gives a solution to test and evaluate this benchmark on HPFT computers for bank intermediary business. In this paper, we present the architecture of BIBbench, defining the structures and attributes of the business model, the database model and the transaction/frame model, and illuminating the workload generation mechanism of the intermediary business system as well. The BIBbench testing environment architecture is also discussed in the paper, as well as the testing solutions and tools. Currently, this BIBbench has been partly implemented on the Oracle 10g database system, and some performance testing experiences based on the BIBbench for HPFT computers have been made. © 2010 IEEE.

关键词： systems engineering

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Optimization and Implementation of LBM benchmark on Multithreaded GPU

Optimization and Implementation of LBM benchmark on Multithr...

引用

international Conference on Data Storage and Data engineering (DSDE)

作者： Ren, Xiaoguang Tang, Yuhua Wang, Guibin Tang, Tao Fang, Xudong Natl Univ Def Technol Sch Comp Natl Lab Parallel & Distributed Proc Changsha Hunan Peoples R China

ISBN: (纸本)9780769539584

With fast development of transistor technology, Graphic Processing Unit(GPU) is increasingly used in the non-graphics applications, and major GPU hardware vendors have introduced software stacks for their own GPUs, such as Brook+ for AMD GPU. Compared with the traditional parallel systems, heterogeneous systems integerating stream-based multi-threaded GPUs provide higher parallel computing capabilities with lower cost. However, porting traditional applications to the heterogeneous systems makes new demand of application optimization on GPU. Based on the AMD's Brook+ platform, we explored application optimization features on AMD GPU by optimizing and implementing the benchmark LBM from SPEC2006. To improve the program locality, we optimized the original data layout of LBM. Using the short vector data types mechanism provided by Brook+, we also optimized the GPU's bandwidth utilization and its thread processors' efficiency. Through the branch elimination technique, we reduced the performance lose caused by branch divergences in the kernel, which is due to the GPU's SIMD executing mode. The experiment results show that data layout, memory bandwidth, branch paths and other factors have a close effect on the performance of program execution on the GPU. Through all the optimizations, we finally got a speedup of 22x (single-precision) and 19x (double-precision) over the original serial benchmark code on a Quad-core CPU, and a speedup of 4x (single-precision) and 8.7x (double-precision) over the original OMP benchmark code on a 8-core CPU.

关键词： GPU LBM Brook optimization

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Control and data complexity metrics for Web service compositions

Control and data complexity metrics for Web service composit...

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10th international Conference on Quality software, QSIC 2010

作者： Mao, Chengying School of Software and Communication Engineering Jiangxi University of Finance and Economics 330013 Nanchang China

ISBN: (纸本)9780769541310

Service-oriented architecture has been widely applied to construct new software system or integrate some legacy applications. Web service technology is the most representative approach to build such system. However, this new software development manner inevitably brings plague to the latter maintenance activities such as comprehension and measurement, despite its convenience for constructing software systems. In the paper, the control flow in Web service composition is modeled by service control flow graph (i.e. SCFG). Then, the execution path complexity metric is proposed through introducing the knowledge about cognitive informatics. Based on such concept, the metric of control flow complexity for whole Web service-based system is also addressed. On the other hand, two data interaction complexities are also presented to reflect the information volume of message communications between services through analyzing the SOAP message. In addition, a well-known Web service composition is used as a case to demonstrate the above metrics. The analysis results show that our measurement methods are reasonable and effective. © 2010 IEEE.

关键词： Web services

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Based on RSA and Self-Modifying Mechanism of software Protection

Based on RSA and Self-Modifying Mechanism of Software Protec...

引用

international symposium on parallel and distributed Processing with Applications, ISPA

作者： He Lin Xuan-sheng Mo Ying Gao School of Information Science and Engineering Lanzhou University LZU Lanzhou China Lanzhou University LZU Shanghai China College of Communication Engineering Chongqing University Chongqing China

software protection is a major problem about which companies and programmers are concerned. This paper first analysis' the methods of current software protection, then proposes a method of serial distribution based on RSA algorithm and a protection technology based on self-modifying mechanism. It makes the program difficult to read and reduces the chance of being cracked.

关键词： software software algorithms Encryption Algorithm design and analysis Registers software protection

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Acceleration of spiking neural networks in emerging multi-core and GPU architectures

Acceleration of spiking neural networks in emerging multi-co...

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2010 IEEE international symposium on parallel and distributed Processing, Workshops and Phd Forum, IPDPSW 2010

作者： Bhuiyan, Mohammad A. Pallipuram, Vivek K. Smith, Melissa C. Department of Electrical and Computer Engineering Clemson University Clemson SC 29634 United States

ISBN: (纸本)9781424465347

Recently, there has been strong interest in large-scale simulations of biological spiking neural networks (SNN) to model the human brain mechanisms and capture its inference capabilities. Among various spiking neuron models, the Hodgkin-Huxley model is the oldest and most compute intensive, whereas the more recent Izhikevich model is very compute efficient. Some of the recent multi-core processors and accelerators including Graphical Processing Units, IBM's Cell Broadband Engine, AMD Opteron, and Intel Xeon can take advantage of task and thread level parallelism, making them good candidates for large-scale SNN simulations. In this paper we implement and analyze two character recognition networks based on these spiking neuron models. We investigate the performance improvement and optimization techniques for SNNs on these accelerators over an equivalent software implementation on a 2.66 GHz Intel Core 2 Quad. We report significant speedups of the two SNNs on these architectures. It has been observed that given proper application of optimization techniques, the commodity X86 processors are viable options for those applications that require a nominal amount of flops/byte. But for applications with a significant number of flops/byte, specialized architectures such as GPUs and cell processors can provide better performance. Our results show that a proper match of architecture with algorithm complexity provides the best performance.© 2010 IEEE.

关键词： Graphics processing unit

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Mapping UML activity diagrams to analyzable Petri net models

Mapping UML activity diagrams to analyzable Petri net models

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10th international Conference on Quality software, QSIC 2010

作者： Yang, Nianhua Yu, Huiqun Sun, Hua Qian, Zhilin Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 201112 China

ISBN: (纸本)9780769541310

To enhance formal analysis, activity diagrams annotated with MARTE stereotypes are mapped into timed colored Petri nets with inhibitor arcs (TCPNIA). The mapping rules for the elements of activity diagrams and MARTE stereotypes are proposed respectively. The rules to map pin nodes and object flows to Petri nets are presented. These nodes can improve activity diagrams modeling abilities for complicated systems. The reaching of any final nodes will stop all the flows in an activity. A method to map final nodes into Petri nets preserving this semantics is also presented with the help of inhibitor arcs. The data related issues are processed through colored properties in the TCPNIA model, guard functions and operational functions. © 2010 IEEE.

关键词： Petri nets

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