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15th International Symposium on System Synthesis

作者： Middha, Bhuvan Raj, Varun Gangwar, Anup Kumar, Anshul Balakrishnan, M. Ienne, Paolo Department of Computer Science Indian Institute of Technology Delhi India Processor Architecture Laboratory Swiss Fed. Inst. Technol. Laussane Switzerland

It is widely accepted that use of an Application Specific Instruction Set Processor (ASIP) in an embedded system can provide a solution which is much more flexible than ASICs and much more efficient than standard processors in terms of performance and power consumption. However a lack of an acceptable design methodology and supporting tools for ASIPs limits their use even today. We present in this paper a methodology for design space exploration of high performance VLIW ASIPs by modeling Application Specific Functional Units in Trimaran Compiler Infrastructure. To demonstrate the effectiveness of our strategy we consider two important applications FFT and Kalman Filter and perform compute intensive operations in these applications via special Functional Units. The results we obtain are very promising with up to 2× speed improvement.

关键词： Program processors

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SSA, SVD, QR-cp, and RBF model reduction

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International Conferences on Artificial Neural Networks, ICANN, 2002

作者： Salmerón, Moisés Ortega, Julio Puntonet, Carlos García Prieto, Alberto Rojas, Ignacio Department of Computer Architecture and Computer Technology University of Granada E.T.S. Ingeniería Informática Campus Aynadamar s/n GranadaE-18071 Spain

ISBN: (纸本)3540440747

We propose an application of SVD model reduction to the class of RBF neural models for improving performance in contexts such as on-line prediction of time series. The SVD is coupled with QR-cp factorization. It has been found that such a coupling leads to more precise extraction of the relevant information, even when using it in an heuristic way. Singular Spectrum Analysis (SSA) and its relation to our method is also mentioned. We analize performance of the proposed on-line algorithm using a ‘benchmark’ chaotic time series and a difficult-to-predict, dynamically changing series. © Springer-Verlag Berlin Heidelberg 2002. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Benchmarking

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Optimisation of multilayer perceptrons using a distributed evolutionary algorithm with SOAP 7th

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7th International Conference on Parallel Problem Solving from Nature, PPSN 2002

作者： Castillo, P.A. Arenas, M.G. Castellano, J.G. Merelo, J.J. Rivas, V.M. Romero, G. Department of Architecture and Computer Technology University of Granada Campus de Fuentenueva GranadaE. 18071 Spain Department of Computer Science University of Jaén Avda. Madrid 35 JaénE. 23071 Spain

ISBN: (纸本)3540441395

SOAP (simple object access protocol) is a protocol that allows the access to remote objects independently of the computer architecture and the language. A client using SOAP can send or receive objects, or access remote object methods. Unlike other remote procedure call methods, like XML-RPC or RMI, SOAP can use many different transport types (for instance, it could be called as a CGI or as sockets). In this paper an approach to evolutionary distributed optimisation of multilayer perceptrons (MLP) using SOAP and language Perl has been done. Obtained results show that the parallel version of the developed programs obtains similar or better results using much less time than the sequential version, obtaining a good speedup. Also it can be shown that obtained results are better than those obtained by other authors using different methods. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Network architecture

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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Multidimensional multistage k-NN classifiers for handwritten digit recognition

Multidimensional multistage k-NN classifiers for handwritten...

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International Workshop on Frontiers in Handwriting Recognition

作者： I. Soraluze C. Rodriguez F. Boto A. Perez Computer Architecture and Technology Department Computer Science Faculty UPV/EHU San Sebastian Spain

ISBN: (纸本)0769516920

This paper analyses the application of multistage classifiers based on the k-NN rule to the automatic classification of handwritten digits. The discriminating capacity of a k-NN classifier increases as the size and dimensionality of the reference pattern set (RPS) increases. This supposes a problem for k-NN classifiers in real applications: the high computational cost required. In order to accelerate the process of calculating the distance to each pattern of the RPS, some authors propose the use of condensing techniques. These methods try to reduce the size of the RPS without losing classification power. Our alternative proposal is based on hierarchical classifiers with rejection techniques and incremental learning that reduce the computational cost of the classifier. We have used 270,000 digits (160,000 digits for training and 110, 000 for the test) of the NIST Special Data Bases 19 and 3 (SD19 and SD3) as experimental data sets. The best non -hierarchical classifier achieves a hit rate of 99.50%. The hierarchical classifier achieves the same hit ratio, but with 24.5 times lower computational cost than best non-hierarchical classifier found in our experimentation and 6 times lower than Hart's Algorithm.

关键词： Multidimensional systems Handwriting recognition Computational efficiency Acceleration Testing NIST Image databases Spatial databases computer architecture computer science

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Structure identification of fuzzy controllers in real time

Structure identification of fuzzy controllers in real time

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： H. Pomares I. Rojas J. Gonzalez Department of Computer Architecture and Computer Technology Faculted de Ciencias Campus Universitario Fuentenueva University of Granada Spain

This paper presents an innovative approach to self-adaptation of the structure of a fuzzy controller in real time. Without any off-line pretraining, the algorithm achieves very high control performance through the iteration of a three-stage algorithm. In the first stage, coarse tuning of the fuzzy rules (both rule consequents and membership functions of the premises) is accomplished using the sign of the dependency of the plant output with respect to the control signal and an overall analysis of the main operating regions. In stage two, fine tuning of the fuzzy rules is achieved based on the controller output error using a gradient-based method. Finally, the third stage is responsible of modifying the structure of the fuzzy controller, proposing that input variable which should get a new membership function in order to improve the control policy in an optimum way.

关键词： Fuzzy control Automatic control Error correction Control systems Fuzzy systems Differential equations Programmable control Adaptive control Adaptive systems computer architecture

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PID-parameter auto-tuner based on embedded MCU

PID-parameter auto-tuner based on embedded MCU

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World Congress on Intelligent Control and Automation (WCICA)

作者： Chen Jie Sun Demin Xue Meisheng Department of Computer & Information Engineering Anhui of Architecture and Industry Hefei China Department of Automation University of Science and Technology Hefei China

This paper describes an algorithm of PID-parameter tuning with correlation-coefficient identification, which is applied in the auto-tuner of PID-parameters based on an embedded MCU. We have optimized the algorithm acc... 详细信息

关键词： Automation Sun Electronic mail Embedded computing computer architecture computer industry Microcontrollers

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An open visualization toolkit for reverse architecting

An open visualization toolkit for reverse architecting

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IEEE Workshop on Program Comprehension

作者： A. Telea A. Maccari C. Riva Department of Mathematics and Computer Science Eindhovan University of Technology Netherlands Software Architecture Group Nokia Research Center Finland

Maintenance and evolution of complex software systems (such as large telecom embedded devices) involve activities such as reverse engineering (RE) and software visualization. Although several RE tools exist, we found their architecture hard to adapt to the domain specific requirements posed by our current practice in Nokia. We present an open architecture which allows easy prototyping of RE data exploration and visualization scenarios for a large range of domain models. We pay special attention to the visual and interactive requirements of the reverse engineering process. The article describes the basic architecture of our toolkit, compares it to the existing RE environments and present several visualizations taken from real cases.

关键词： Reverse engineering computer architecture Data visualization Software systems Software tools Application software Software maintenance Rendering (computer graphics) Mathematics computer science

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Analyzing Boltzmann machine parameters for fast convergence

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6th International Work-Conference on Artificial and Natural Neural Networks, IWANN 2001

作者： Salcedo, Fco Javier Ortega, Julio Prieto, Alberto Department of Computer Architecture and Technology University of Granada Spain

ISBN: (纸本)9783540422372

The behavior of a Boltzmann Machine (BM) according to changes in the parameters that determine its convergence is experimentally analyzed to find a way to accelerate the convergence towards a solution for the given optimization problem. The graph colouring problem has been chosen as a benchmark for which convergence with quadratic time complexity has been obtained. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Artificial intelligence

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Reliably locking system v shared memory for user level communication in linux

Reliably locking system v shared memory for user level commu...

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2001 IEEE International Conference on Cluster Computing, CLUSTER 2001

作者： Seifert, Friedrich Rehm, Wolfgang Chemnitz University of Technology Department of Computer Science Chair of Computer Architecture Strabe der Nationen 62 Chemnitz09111 Germany

ISBN: (纸本)0769511163

A major trend in recent cluster communication systems is to circumvent the operating system during the actual data transfers. That, on the one hand, reduces latency since there is no user-kernel transition needed and, on the other hand, increases bandwidth by avoiding additional intermediate copies. The data transfer is handled completely by the networking hardware and its DMA engine. For example, the Virtual Interface processes can access networking hardware directly in a protected manner. One of its characteristics is that it requires that all memory used for communication be locked down into physical memory. The same requirement holds true for the Infiniband ensures reliable locking of regular, i.e. private, virtual memory without altering the kernel. In this paper we present an extended solution that can handle System V shared memory as well. © 2001 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.

关键词： Linux

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