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IEEE International Conference on Information Reuse and Integration (IRI)

作者： M.-L. Shyu I.P. Kuruppu-Appuhamilage S.-C. Chen L. Chang Department of Electrical and Computer Engineering University of Miami Coral Gables FL USA Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL USA Naval Research Laboratory Center for High Assurance Computer Systems Washington D.C. DC USA

In this paper, a framework for replacing missing values in a database is proposed since a real-world database is seldom complete. Good data quality in a database can directly improve the performance of any data mining algorithm in various applications. Our proposed framework adopts the basic concepts from conditional probability theories and further develops an algorithm to facilitate the capability of handling both nominal and numerical values, which addresses the problem of the inability of handling both nominal and numerical values with a high degree of accuracy in the existing algorithms. Several experiments are conducted and the experimental results demonstrate that our framework provides a high accuracy when compared with most of the commonly used algorithms such as using the average value, using the maximum value, and using the minimum value to replace missing values.

关键词： Cleaning Data mining Multimedia databases Laboratories distributed databases Data preprocessing Multimedia systems Information systems computer science distributed computing

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Testing and Certification of Trustworthy systems Introduction to Minitrack

Testing and Certification of Trustworthy Systems Introductio...

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Annual Hawaii International Conference on System Sciences (HICSS)

作者： A.R. Hevner R.C. Linger G.H. Walton Information Systems & Decision Sciences Department University of South Florida Tampa FL USA Software Engineering Institute CERT Research Center Carnegie Mellon University Pittsburgh PA USA Department of Mathematics & Computer Science Florida Southern College Lakeland FL USA

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Prototype of fault adaptive embedded software for large-scale real-time systems

Prototype of fault adaptive embedded software for large-scal...

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International Conference and Workshop on engineering of computer-Based systems

作者： D. Messie M. Jung J.C. Oh Shweta Shetty S. Nordstrom M. Haney Department of Electrical Engineering and Computer Science Syracuse University Syracuse NY USA Institute for Software Integrated Systems Vanderbilt University Nashville TN USA High Energy Physics University of Illinois Urbana-Champaign Urbana-Champaign IL USA

This paper describes a comprehensive prototype of large-scale fault adaptive embedded software developed for the proposed Fermilab BTeV high energy physics experiment. Lightweight self-optimizing agents embedded within Level 1 of the prototype are responsible for proactive and reactive monitoring and mitigation based on specified layers of competence. The agents are self-protecting, detecting cascading failures using a distributed approach. Adaptive, reconfigurable, and mobile objects for reliablility are designed to be self-configuring to adapt automatically to dynamically changing environments. These objects provide a self-healing layer with the ability to discover, diagnose, and react to discontinuities in real-time processing. A generic modeling environment was developed to facilitate design and implementation of hardware resource specifications, application data flow, and failure mitigation strategies. Level 1 of the planned BTeV trigger system alone will consist of 2500 DSPs, so the number of components and intractable fault scenarios involved make it impossible to design an 'expert system' that applies traditional centralized mitigative strategies based on rules capturing every possible system state. Instead, a distributed reactive approach is implemented using the tools and methodologies developed by the Real-Time Embedded systems group.

关键词： software prototyping Embedded software Large-scale systems Real time systems Prototypes Condition monitoring Power system faults Power system protection Hardware Digital signal processing

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The RTES project - BTeV, and beyond

The RTES project - BTeV, and beyond

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2005 14TH IEEE-NPSS Real Time Conference

作者： Haney, Michael J. Ahuja, Shikha Bapty, Ted Cheung, Harry Kalbarczyk, Zbigniew Khanna, Akhilesh Kowalkowski, Jim Messie, Derek Mossé, Daniel Neema, Sandeep Nordstrom, Steve Oh, Jae Sheldon, Paul Shetty, Shweta Volper, Dmitri Wang, Long Yao, Di IEEE High Energy Physics University of Illinois 1110 W. Green Street Urbana IL 61801 United States Institute for Software Integrated Systems Vanderbilt University Nashville TN 37235 United States Fermi National Accelerator Laboratory Batavia IL 60510 United States Electrical and Computer Science University of Illinois Urbana IL 61801 United States Electrical Engineering and Computer Science Syracuse University Syracuse NY 13244 United States Computer Science University of Pittsburgh Pittsburgh PA 15250 United States Physics and Astronomy Department Vanderbilt University Nashville TN 37235 United States

ISBN: (纸本)0780391837

The Real Time Embedded systems (RTES) project was created to study the design and implementation of high-performance, heterogeneous, and fault-adaptive real time embedded systems. The driving application for this research was the proposed BTeV high energy physics experiment, which called for large farms of embedded computational elements (DSPs), as well as a large farm of conventional high-performance processors to implement its Level 1 and Level 2/3 triggers. At the time of BTeV's termination early in 2005, the RTES project was within days of completing a prototype implementation for providing a reliable and fault-adaptive infrastructure to the L2/3 farm;a prototype for the L1 farm had been completed in 2003. This paper documents the conclusion of the RTES focus on BTeV, and provides an evaluation of the applicability of the RTES concepts to other systems. ©2005 IEEE.

关键词： Embedded systems

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Service-oriented software reengineering: Bertie3 as Web services

Service-oriented software reengineering: Bertie3 as Web serv...

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IEEE International Conference on Web Services (ICWS)

作者： S. Chung P.S. Young J. Nelson Computing & Software Systems Institute of Technology University of Washington Tacoma Tacoma WA USA Department of Computer Science College of Engineering University of Illinois Urbana-Champaign Urbana IL USA Interdisciplinary Arts & Sciences University of Washington Tacoma Tacoma WA USA

This research proposes to modernize a legacy software system by using Web services as the main building blocks of the software reengineering. For this purpose, a legacy theorem proof checking and derivation tool called Bertie3 is reengineered in terms of service-oriented architecture, service-oriented componentization, and external data representation and serialization. With the Web services of derivation checking engines and first-order markup languages, a minimal amount of development time can be spent working on well-known and well-developed components. More time can be spent updating the features that make the tool unique. This case study shows that modernizing a software system with Web services will allow the business components of the system to be easily expanded and integrated with other application components for future demands.

关键词： Web services Logic Markup languages Engines software systems Lifting equipment Business distributed computing User interfaces Graphical user interfaces

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Wireless-control strategy for parallel operation of distributed generation inverters

Wireless-control strategy for parallel operation of distribu...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： J.M. Guerrero J. Matas L.G. de Vicuna N. Berbel J. Sosa Department of Automatic Control and Computer Engineering Universitat Poliltècnica de Catalunya Spain Sustainable Distributed Generation Systems and Renewable Energy Group Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona Barcelona Spain Department of Electronic Engineering Universitat Poliltècnica de Catalunya Spain Laboratorio de Instrumentación Científica Universidad de Los Andes Merida Venezuela

In this paper, a method for the parallel operation of inverters in an ac-distributed system is proposed. The paper explores the control of active and reactive power flow through the analysis of the output impedance of the inverters and its impact on the power sharing. As a result, adaptive virtual output impedance is proposed in order to achieve a proper reactive power sharing regardless of the line impedance unbalances. A soft-start operation is also included, avoiding the initial current peak, which results in a seamless hot-swap operation. Active power sharing is achieved by adjusting the frequency in load transient situations only, thanks to which the proposed method obtains constant steady-state frequency and amplitude. As opposed to the conventional droop method, the transient response can be modified by acting on the main control parameters. Linear and nonlinear loads can be properly shared due to the addition of a current harmonic loop in the control strategy. Experimental results are presented from a two 6-kVA parallel-connected inverters system, showing the feasibility of the proposed approach.

关键词： distributed control Inverters Voltage control Power harmonic filters Impedance Frequency Power engineering and energy Reactive power control Reactive power Communication system control

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Journal of Information Science and engineering: Editorial notice

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Journal of Information Science and engineering 2005年第5期21卷 i-ii页

作者： Lee, Der-Tsai Amato, Nancy M. Chang, Shih-Fu Chen, Homer H. Chen, Tsuhan Hsu, Tsan-Sheng Hwang, Jenq-Neng Kuo, Sy-Yen Kuo, Tei-Wei Li, Chung-Sheng Tokuyama, Takeshi Wing, Jeannette Wu, Tzong-Chen Yen, John Computer Science at Texas A and M University United States Parasol Laboratory United States IEEE Transactions on Parallel and Distributed Systems Computing Research Association's Committee on the Status of Women in Computing Research CRA-W's Distributed Mentor Program United States Department of Electrical Engineering Columbia University United States Lab. United States College of Electrical Engineering and Computer Science National Taiwan University Taiwan IEEE Transactions on Circuits and Systems for Video Technology IEEE Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA United States ACM ACM SIGACT IEEE Computer Society IICM Austria Research and Development of the Department Multimedia Signal Processing Technical Committee IEEE Signal Processing Society United States IEEE Transactions on Circuits and systems for Video Technology College of Electrical Engineering and Computer Science National Taiwan Ocean University Keelung Taiwan Department of Electrical Engineering National Taiwan University Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan IEEE Technical Committee on Real-Time Systems Computer Science Division IBM T.J. Watson Research Center United States IBM Research Division Graduate School of Information Sciences Tohoku University Japan ACM IPSJ Mathematical Society of Japan Japan Department of Computer Science Computer Science Department Carnegie Mellon University United States National Academies of Science's Computer Science and Telecommunications Board United States Microsoft's Trustworthy Academic Advisory Board Intel Research Pittsburgh's Advisory Board United States Dartmouth's Institute for Security Technology Studies Advisory Committee Canada Sloan Research Fellowships Program Committee United States ACM Taiwan China Information Sciences and Technology Pennsylvania State University United States Laboratory for Intelligent Agents Penn State's School of Info

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The RTES project - BTeV, and beyond

The RTES project - BTeV, and beyond

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IEEE NPSS Conference on Real Time

作者： M.J. Haney S. Ahuja G. Bapty H. Cheung Z. Kalbarczyk A. Khanna J. Kowalkowski D. Messie D. Mosse S. Neema S. Nordstrom Jae Oh P. Sheldon S. Shetty D. Volper Long Wang Di Yao High Energy Physics University of Illinois Urbana IL USA Institute for Software Integrated Systems Vanderbilt University Nashville TN USA Fenni National Accelerator Laboratory Batavia IL USA Electrical and Computer Science University of Illinois Urbana IL USA Electrical Engineering and Computer Science Syracuse University Syracuse NY USA Computer Science University of Pittsburgh Pittsburgh PA USA Physics and Astronomy Department Vanderbilt University Nashville TN USA

The real time embedded systems (RTES) project was created to study the design and implementation of high-performance, heterogeneous, and fault-adaptive real time embedded systems. The driving application for this research was the proposed BTeV high energy physics experiment, which called for large farms of embedded computational elements (DSPs), as well as a large farm of conventional high-performance processors to implement its Level 1 and Level 2/3 triggers. At the time of BTeV's termination early in 2005, the RTES project was within days of completing a prototype implementation for providing a reliable and fault-adaptive infrastructure to the L2/3 farm; a prototype for the L1 farm had been completed in 2003. This paper documents the conclusion of the RTES focus on BTeV, and provides an evaluation of the applicability of the RTES concepts to other systems

关键词： USA Councils Real time systems Physics computing Runtime computer science Embedded system Domain specific languages Embedded computing Prototypes Fault detection

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A market-based scheduler for JXTA-based peer-to-peer computing system

A market-based scheduler for JXTA-based peer-to-peer computi...

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International Conference on Computational Science and its Applications, ICCSA 2004

作者： Ping, Tan Tien Sodhy, Gian Chand Yong, Chan Huah Haron, Fazilah Buyya, Rajkumar School of Computer Science Universiti Sains Malaysia Penang11800 Malaysia Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

ISBN: (纸本)3540220607

Peer-to-Peer (P2P) computing is said to be the next wave of computing after client-server and web-based computing. It provides an opportunity to harness a lot of idle peer-resources such as desktop computers across the Internet, for solving large-scale computing applications. Each peer is autonomous and it needs incentive for sustained contribution of its resources to P2P applications. In addition, a flexible and efficient job scheduling is needed to harvest the idle computing power as cheaply and economically as possible. This paper introduces an economic based job scheduler for mapping jobs to resources in P2P computing environment. The scheduler has been implemented with the Compute Power Market (CPM) system developed using Sun JXTA P2P technology. Our scheduler can be configured depending on users’ quality of service requirements such as the deadline and budget constraints. Our scheduler follows a hierarchy scheme. The design allows multiple consumers and multiple providers to schedule and run jobs. To allow wider support for a wide variety of applications, the system is designed to allow easy ‘plug in’ of user applications. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Personal computers

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Enabling collaborative adaptation across legacy components

Enabling collaborative adaptation across legacy components

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3rd Workshop on Adaptive and Reflective Middleware, ARM '04

作者： Yang, Z. Zhou, Z. Cheng, B.H.C. McKinley, P.K. Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI 48824 United States

ISBN: (纸本)1581139497

software frequently needs to adapt its behavior at run time to respond to changes in its execution environment. Different software components may use different approaches to adaptation. Composing a single adaptive system from existing adaptive components requires an "adaptation infrastructure" to integrate and arbitrate adaptive behaviors. This paper proposes a model for such an infrastructure and describes the design and operation of M2, a prototype implementation. M2 uses a technique called transparent shaping to modify existing components so that they can report events of interest to the M2 core and implement appropriate responses. The architecture and communication infrastructure of M2 are described, followed by a case study in which M2 is used to construct an adaptive multimedia conferencing application from otherwise incompatible components. Copyright 2004 ACM.

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