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International Conference on Industrial Electronics, Control and inst.umentation

作者： B. Sirinaovakul P. Tajchayapong Dept. of Comput. Eng. King Mongkut's Inst. of Technol. Thonburi Bangkok Thailand Computer Engineering Department King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand

The development and construction of artificial intelligence to solve a plant layout design problem are considered. The heuristic for pattern allocation, the heuristic search and heuristic function for problem solving, and the plant design knowledge base are used to construct the intelligent system. The pattern allocation procedure is the heuristic for generating the alternative layouts. In the problem solving procedure, the search heuristic searches for the best layout from the candidate layouts and the heuristic function directs the search process in the most profitable direction. The system performance has been evaluated and tested many times.< >

关键词： Artificial intelligence Costs Problem-solving Manufacturing Materials handling Expert systems Design engineering Knowledge engineering Paper technology Intelligent systems

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Signature analysers based on additive cellular automata

Signature analysers based on additive cellular automata

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International Symposium on Fault-Tolerant Computing (FTCS)

作者： A.K. Das D. Saha A.R. Chowdhury S. Misra P.P. Chaudhuri Department of Computer Sciences & Engineering Indian Institute of Technology Kharagpur India Dept. of Comput. Sci. & Eng. Indian Inst. of Technol. Kharagpur India

A novel scheme for signature analysis based on cellular automata (CA) is proposed. The state transition behavior of such signature analyzers has been modeled by Markov chain. It has been shown that a special class of such CAs achieves a steady-state aliasing probability lower than 1/2/sup n/ (for an n-cell CA) for specific ranges of input probabilities of the incoming error pattern. The dynamic behavior of linear feedback shift registers (LFSRs) has also been compared with CAs with the same characteristic polynomials. This work establishes the fact that CA-based signature analyzers outperform those based on LFSRs as regards both steady-state and dynamic behavior.< >

关键词： Content addressable storage Logic Polynomials Steady-state Data compression Circuit faults Electrical fault detection Fault detection Hardware

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An implementation of a barotropic numerical weather prediction model in the functional language SISAL 90

An implementation of a barotropic numerical weather predicti...

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2nd ACM SIGPLAN Symposium on Principles and Practice of Parallel Programming, PPOPP 1990

作者： Chang, Pau S. Egan, Gregory K. Jt. Roy. Melbourne Inst. of Technol. and Cmw. Scientific and Industrial Research Organisation Parallel Systems Architecture Project Australia Royal Melbourne Institute of Technology Dept of Communication and Electrical Engineering 124 La Trobe St. Melbourne3000 Australia Department of Computer Systems Engineering Swinburne Institute of Technology School of Electrical Engineering John Street Hawthorn3122 Australia

ISBN: (纸本)0897913507

Numerical Weather Prediction (NWP) is acknowledged as being of vital importance to economy. The demand that NWP places on computing system performance has increased dramatically since the introduction of computer systems and is siili growing. This paper describes the implementation of a one-level barotropic spectral NWP model using the high level functional language SISAL. Our initial approach was a direct transliteration from FORTRAN to SISAL, the result of which was a large amount of array copying and loss of parallelism. The algorithm of the model was then rearranged to enable effective exploitation of parallelism by an optimising SISAL compiler. The parallel implementation technique and its potential for modeling with larger model sizes are discussed, and the improved results for an Encore Multimax multiprocessor are presented. © 1990 ACM.

关键词： High level languages

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SALSA: a new approach to scheduling with timing constraints

SALSA: a new approach to scheduling with timing constraints

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IEEE International Conference on computer-Aided Design

作者： J.A. Nestor G. Krishnamoorthy Department of Electrical & Computer Engineering Illinois Institute of Technology Chicago IL USA Dept. of Electr. & Comput. Eng. Illinois Inst. of Technol. Chicago IL USA

First, an initial schedule that satisfies all timing constraints is generated using algorithms adapted from layout compaction. This schedule is then improved with respect to resource usage using simulated annealing. SALSA provides for efficient exploration of alternative schedules while supporting timing constraints, conditionals, loops, and subroutines. The SALSA scheduling procedure is described in detail. An implementation of the approach shows promising results.< >

关键词： Timing Processor scheduling Simulated annealing Compaction Algorithms Costs Law Legal factors Computational modeling computer simulation

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Dynamic static VAr compensation and stability of HVAC-An outlook and trend

Dynamic static VAr compensation and stability of HVAC-An out...

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Annual North-American Power Symposium

作者： B. Hussain A.K. Behera Dept. of Electr. & Comput. Eng. Illinois Inst. of Technol. Chicago IL USA Department of Electrical & Computer Engineering Illinois Institute of Technology Chicago IL USA

Static VAr compensators are reviewed for their application in transmission line compensation and load compensation. Emphasis is given to the application of thyristor controlled reactors and thyristor switched capacitors. After a quick review of the application of static VAr compensators, a detailed theoretical analysis of the reactive power requirement is made. A mathematical model of the compensator is established for the possible controllable parameters. In the theoretical analysis, both symmetrical line and radial line systems are considered. Stability of a transmission line is analyzed for reactive power compensation. Present trends are discussed for finer continuous reactive power control. Solid state reactive power compensation without the need for large capacitors and reactors is seen to be the most probable candidate. Solid state devices for high power capability and transient response along with other reactive power requirements are also discussed.< >

关键词： Reactive power Stability Static VAr compensators Power transmission lines Transmission line theory Thyristors Inductors Capacitors Solid state circuits Load management

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Adaptive model-based neural network control

Adaptive model-based neural network control

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IEEE International Conference on Robotics and Automation (ICRA)

作者： M.A. Johnson M.B. Leahy Dept. of Electr. & Comput. Eng. Air Force Inst. of Technol. OH USA Department of Electrical and Computer Engineering Air Force Institute of Technology OH USA

A form of adaptive model-based control is proposed and experimentally evaluated. An adaptive model-based neural network controller (AMBNNC) uses multilayer perceptron artificial neural networks to estimate the payload during high-speed manipulator motion. The payload estimate adapts the feedforward compensator to unmodeled system dynamics and payload variation. The neural nets are trained through repetitive training on trajectory tracking error data. The AMBNNC was experimentally evaluated on the third link of a PUMA-560 manipulator. Tracking performance was evaluated for a wide range of payload and trajectory conditions and compared to a nonadaptive model-based controller. The superior tracking accuracy of the AMBNNC demonstrates the potential of the technique.< >

关键词： Adaptive systems Programmable control Adaptive control Neural networks Artificial neural networks Payloads Manipulator dynamics Trajectory Multi-layer neural network Motion control

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Analysis and generalization of a median adaptive filter

Analysis and generalization of a median adaptive filter

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： T.I. Haweel P.M. Clarkson Dept. of Electr. & Comput. Eng. Illinois Inst. of Technol. Chicago IL USA Department of Electrical and Computer Engineering Illinois Institute of Technology Chicago IL USA

A class of gradient based adaptive algorithms is presented which employs order-statistical transformations of the gradient estimates over a short window. These algorithms, called order-statistical least mean squares (OSLMS), are designed to facilitate adaptive filter performance close to the least-squares optimum in impulsive and other non-Gaussian input environments. Three specific OSLMS filters are defined: the median LMS, the averaged LMS, and the trimmed-mean LMS. For the median LMS some simple convergence results are given. Simulations of all three algorithms, conducted using a generalized exponential density, are presented.< >

关键词： Adaptive filters Least squares approximation Adaptive algorithm Algorithm design and analysis Convergence

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Towards a System Architecture Supporting Contextuahzed Learning 8

Towards a System Architecture Supporting Contextuahzed Learn...

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8th National Conference on Artificial Intelligence, AAAI 1990

作者： Fischer, Gerhard Lemke, Andreas C. McCall, Raymond Dept. of Computer Science Engineering Center ECOT 7-7 University of Colorado BoulderCO80309-0430 United States College of Environmental Design Engineering Center ECOT 7-7 University of Colorado BoulderCO80309-0430 United States Inst. of Cognitive Science Engineering Center ECOT 7-7 University of Colorado BoulderCO80309-0430 United States

ISBN: (纸本)026251057X

We have developed a conceptual framework and a demonstration system that contextualize (or situate) learning in the context of real-world work situations. The conceptual framework is based on the following requirements: the choice of tasks and goals must be under the control of the user, not the system. The environment must be able to situate learning, allow situations to "talk back,"support reflection-in-action, identify the inst.uctional information relevant for tasks at hand, and turn breakdowns from disasters into opportunities for learning. Learning must not disrupt or interfere with solving a problem, and new information to be learned must help to accomplish the task at hand. Our demonstration system janus (developed for the domain of architectural design) is built on an integrated architecture: a knowledge-based construction component, a hypermedia-based argumentation component, a set of critics, and a catalog of precedent solutions. Contextuahzed learning is supported by the critics that link construction and argumentation, and precedent solutions from the catalog that situate argumentation. Evaluation of janus and the underlying conceptual framework have shown that this approach combines some of the best features of open-ended learning environments and tutoring systems.1 Copyright © 1990, AAAI (***). All rights reserved.

关键词： Knowledge based systems

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Direction finding of narrowband autoregressive sources by antenna arrays

Direction finding of narrowband autoregressive sources by an...

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Antennas and Propagation Society International Symposium

作者： I. Ziskind Y. Bar-Ness Dept. of Electr. & Comput. Eng. New Jersey Inst. of Technol. Newark NJ USA Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NY USA

Unique localization of multiple sources by antenna arrays requires that the number of sensors be greater than the number of sources. When additional information is given this is no longer true. The authors assumed a signal structure of the autoregressive (AR) type. A localization procedure is presented which consists of two stages; in the first stage the coefficients of the AR signals are estimated, while in the second stage the directions of arrival are estimated. Simulation results demonstrate the performance of the algorithm under different scenarios.< >

关键词： Narrowband Directive antennas Antenna arrays Sensor arrays Antennas and propagation Direction of arrival estimation Propagation delay Frequency Receiving antennas Bandwidth

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SIGNIFICANCE OF INITIAL INTERPOLATION IN BAND-LIMITED SIGNAL INTERPOLATION

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IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING 1989年第1期37卷 151-152页

作者： YEGNANARAYANA, B FATHIMA, ST NEHRU, BTKR VENKATARAMANAN, B Department of Computer Science and Engineering Indian Institute of Technology Chennai India Dept. of Comput. Sci. & Eng. Indian Inst. of Technol. Madras India

An improved version of the Papoulis algorithm for bandlimited signal interpolation is presented. This algorithm uses the concept of initial interpolation. The justification for initial interpolation is developed only through experimental studies. It is shown that the performance of the interpolation scheme depends on the number and distribution of the known data samples.< >

关键词： Interpolation computer science Uncertainty Polynomials Iterative methods Signal generators Random sequences Speech processing Acoustic signal processing

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