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Lecture Notes in computer science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 1995年 967卷 V-VI页

作者： Bowen, Jonathan Hincbey, Mike Oxford University Computing Laboratory Wolfson Building Parks Road Oxford United Kingdom Real-Time Computing Laboratory New Jersey Institute of Technology University Heights NewarkNJ United States Department of Computer Science and Information Systems University of Limerick Plassey Technological Park Castletroy Limerick Ireland

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PARALLEL AND DISTRIBUTED TLM COMPUTATION WITH SIGNAL-PROCESSING FOR ELECTROMAGNETIC-FIELD MODELING

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWARAPPA, C HOEFER, WJR NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (DECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ARMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

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Steady‐state security evaluation of electrical power systems by means of artificial neural network

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European Transactions on Electrical Power 1995年第2期5卷 91-97页

作者： Chiodo, E. Menniti, D. Testa, A. Picardi, C. Elio Chiodo (1959) received the degree in Electronics Engineering in 1985 and the Ph.D. degree in Computational Statistics both from the University of Naplefltaly. He is a Researcher at the Department of Electrical Engineering of the University of Naples and a member of the Italian Statistical Society. His areas of interest include probabilistic methods applied to electric power systems analysis. (University of Naples Fedrrico 11. Electrical Engineering Dept.via Claudio 21 1-80125 Naplefltaly T +3981/7683226 Fax+3981/2396897) Daniele Menniti (1958) received the degree in Electrical Engineering from the University of Calabria. Cosenzataly and the Ph.D. degree in Electrical Engineering from the University of NapleslItaly in 1984 and 1989 respectively. He is a researcher at the Electronic. Computer and Systems Science Department of the University of Calabria. Italy. Hiscurrent research interests concern electric power system analysis real-time control and automation. (University of Calabria Electronic Computer and Systems Science Dep. Arcavacataji Rende (CS). 1-87036 CosenzdItaly T +39984/494707. Fax +39984/4947 13) Alfredo Testa (1950) received the degree in Electrical Engineering from the University of Naples/Italy in 1975. He is an Associate Professor in Electrical Power Systems at the Department of Electrical Engineering of the University of Naples. He is engaged in researches on electrical power systems reliability and harmonic analysis. (University of Naples Federico 11. Electrical Engineering Dep. via Claudio '2 1 1-80 I25 NapleslItaly T + 39 8 I/7 68 3'2 11. Fax+3981/2396897) Ciro Picardi (1949) received the degree in Electronics Engineering from the University of Naples/Italy in 1975. He is currently Associate Professor in Process Control at the Department of Electronic Computer and System Science of the University of Calabria. Italy. His current research interests are in the area of electrical drives robotics neural networks and fuzzy control. (University of Calabria Electronic. Compu

An artificial‐neural‐network (ANN) application for steady‐state security evaluation of electrical power systems is presented. Such application is based upon a combined use of a multilayer back‐propagation neural network and of an opportune electrical system model, previously proposed by some of the authors. In the paper, the definition of steady‐state security and the problems arising from its on‐line evaluation are briefly recalled. Then, the ANN utilized is described with particular reference to the solutions adopted by the authors. Afterwards, some remarks on the system model utilized are reported. Finally, numerical applications on the AEP‐14 bus system are presented and the results obtained with different ANN configurations are analyzed. Copyright © 1995 John Wiley & Sons, Ltd.

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THE CONTROL ARCHITECTURE OF THE PRIAMOS MOBILE SYSTEM

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CONTROL ENGINEERING PRACTICE 1994年第2期2卷 341-346页

作者： DILLMANN, R KREUZIGER, J WALLNER, F Department of Computer Science University of Karlsruhe Institute for Real-Time Computer Control Systems and Robotics P.O. Box 6980 76128 Karlsruhe Germany

In this paper the control architecture of the PRIAMOS mobile robot system is presented. It consists of four layers which integrate reactive and reflexive components in such a way that the robot can combine fast reaction to unexpected obstacles with predictive behaviour to known components in the environment. A solution for the problem of how to combine control layers which process information on different levels of abstraction and of increasing complexity is discussed. The reflexive part of the control architecture and the modification concerning the motion controller of the mobile robot which was necessary to apply the idea of reflexive navigation is described in more detail. The architecture presented allows motion tasks to be executed in partially unknown or changing environment in an efficient manner. Especially, the time-critical reflexive level is computationally less expensive than in previous approaches.

关键词： INTELLIGENT MACHINES NAVIGATION HIERARCHICALLY INTELLIGENT CONTROL ARCHITECTURE OBSTACLE AVOIDANCE ROBOTS SENSORS

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AUTOMATED OPPOSING FORCES FOR TRAINING SIMULATIONS

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NAVAL ENGINEERS JOURNAL 1995年第3期107卷 245-252页

作者： ANTON, PS MCADOW, KL SMITH, DB LEHNER, PE SHARP, MA Dr. Philip S. Anton:is currently the Terhnology Area Manager of Modeling and Reasoning in the MITRE Advanced Information Technologies Center. His research at MITRE has included behavioral models of military doctrine and command environmental modeling and reasoning for command forces and intelligent simulations of military entities. His other interests include neural networks artificial intelligence and intelligent agents. Dr. Anton received a U.S. degree in Computer Engineering from UCLA and an M.S. degree and a Ph.D in Computational Neuroscience from the University of California. Irvine After finishing nuclear power training Mr. McAdow served as an Engineering Department Division Officer on USS Mariano G. Vallejo (SSBN 658). He then worked as a civilian far the Naval Coastal Systems Center and then far Martin Marietta Aero and Naval Systems in the development of various submarine systems and unmanned undersea vehicles. David Smith:has been a member of the technical staff at MITRE s Advanced Information Technologies center since 1993. He has a B.S. degree in Computer Science and Mathematics from Albright College and an M.S. degree in Information and Computer Science from the Georgia Institute of Technology. Dr. Paul Lehner:is a part-time Principal Scientist in the MITRE Advanced Information Technologies Center. In addition. Dr. Lehner is an Associate Professor of Systems Engineering at George Mason University. His research at MITRE has included automated planning and scheduling adversarial planning and reasoning against uncertainty. Dr. Lehner received a B.S. degree in Psychology from Bethany College. He also holds M.S. degrees in Psychology and Mathematics and a Ph.D. in Mathematical Psychology from the University of Michigan. Prior to his current employment at MITRE and at George Mason University Dr. Lehner served as the Technical Director of the Decision Sciences Section at PAR Government Systems Corporation. After finishing nuclear power training Cdr. Sharp served as an Engineering Department Divisi

Providing realistic opposing forces is critical to the successful use of military training simulations. Unfortunately, a number of issues can make the manual control of realistic opposing forces difficult or unattainable, This paper explores these issues while discussing how Automatic Interactive Targets (AITs) can assist Training Exercise Controllers (TECs) in providing validated and realistic opposing forces in highly interactive situations. The features of the prototype Remote AIT Processing System (RAPS) are used to demonstrate how an AIT system can be designed to meet TEC requirements for automated entities, RAPS can provide remote control of AITs for existing or new systems while providing sufficient features to allow a TEC to appropriately select and control AITs for individual training exercises and crew proficiencies.

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PLACING REGISTRATION MARKS

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 1994年第1期41卷 51-59页

作者： RAO, AS GOLDBERG, KY Department of Computer Science University of Utrecht Utrecht Netherlands Departments of Computer Science and Electrical Engineering-Systems Institute of Robotics and Intelligent Systems University of Southern California Los Angeles CA USA

In industrial assembly, a registration mark can be placed on parts to aid a computer vision system in determining the position and orientation (pose) of parts. However, when sensor noise and limits on resolution introduce errors in the measured location of the registration mark, these errors can propagate into the measurement of part pose. In this paper, we define the registration mark problem: given an n-sided rigid planar polygonal part-and a set of k poses for the part, locate a point on the surface of the part that maximizes the minimum distance between transformed points. A registration mark at this point will be maximally robust to sensor imperfections. We give an 0(n log n + k4 log k log* k) time algorithm to solve this planar problem using a result from Schwartz and Sharir [21], and demonstrate the algorithm using a commercial vision system. Our results extend to classes of curved planar parts and polyhedral parts.

关键词： computer vision computer errors Noise measurement Manufacturing automation robotics and automation computer science Intelligent robots computer industry Assembly systems Robustness

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SUPRA-RPC - SUBPROGRAM PARAMETERS IN REMOTE PROCEDURE CALLS

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SOFTWARE-PRACTICE & EXPERIENCE 1994年第1期24卷 27-49页

作者： STOYENKO, AD Real-Time Computing Laboratory Department of Computer and Information Science New Jersey Institute of Technology University Heights Newark New Jersey 07102 U.S.A.

Remote-procedure calls (RPCs) allow distributed, high-level language programs to communicate and synchronize in the usual manner via subprogram calls. One of the great challenges in RPC research is to preserve the traditional call semantics despite the distribution and heterogeneity of the new environment. The main contribution of SUPRA-RPC is in addressing the passing of subprograms as RPC parameters. In doing so, SUPRA overcomes a number of technical difficulties, stemming from scoping, side-effects and other sources. Since supporting subprogram RPC parameters is harder than supporting nonsubprogram RPC parameters, the three (of six) components of the SUPRA architecture extend in novel ways the traditional functionality found in their counterparts in other RPC systems. The SUPRA stub generator extracts information not only from remote entry interfaces, but from any scope potentially referenced by a subprogram passed as an RPC parameter. In addition to the usual call- and accept-stubs and the marshaling and unmarshaling routines, the generator constructs out-of-scope access stubs, callback' and callback-handling-stubs, and modified parameter subprograms and others. The SUPRA run-time support manages a run-time symbol table to keep track of referencing environments and out-of-scope objects. When an out-of-scope object is unavailable for access or execution on the server, the object is reached by a synchronous, 'under-the-covers' callback. The SUPRA process management supports servers with independent threads of control, manages (possibly nested) callbacks and pools of callback handler threads, and maintains correct identification of thread-initiated calls or callbacks. A SUPRA prototype has been implemented on Sun Unix workstations. The prototype supports C, C++ and CommonLisp programs. A prototype graphical demonstration has been implemented as well, that represents RPC concepts in terms of common life objects and situations.

关键词： REMOTE PROCEDURE CALLS PASSING SUBPROGRAMS AS PARAMETERS PRESERVING HIGH-LEVEL LANGUAGE SEMANTICS DISTRIBUTED PROGRAMS STUB GENERATION CALLBACKS

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Design of a fuzzy controller for optimal execution of subgoal-guided robot motions

Design of a fuzzy controller for optimal execution of subgoa...

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IEEE International Conference on robotics and Automation (ICRA)

作者： Jianwei Zhang A. Herp Inst. for Real-Time Computer Systems and Robotics Karlsruhe Univ. Germany Institute for Real-Time Computer Systems and Robotics Department of Computer Science University of Karlsruhe Karlsruhe Germany

In this paper, an approach is presented for designing a robot controller to integrate path planning and motion execution. Instead of following an exactly planned geometric path, which cannot be easily modified to deal with uncertainties, a robot realizes its motion under the guidance of a sequence of grossly selected crucial points called subgoals. A fuzzy model is used for on-line controlling the robot to pass through the subgoals smoothly. With the help of heuristics for optimal motion control, the rule base can be developed. Such a concept provides a control method in real time as well as a possibility of integrating sensor data for the subgoal-guided motion.< >

关键词： Fuzzy control Optimal control Motion control Path planning Orbital robotics Robot sensing systems Motion planning Collision avoidance Solid modeling Control systems

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Least-space-time-first scheduling algorithm: A policy for complex real-time tasks in multiple processor systems

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Annual Review in Automatic Programming 1994年第C期18卷 33-38页

作者： Bo-Chao, Cheng Stoyenko, Alexander D Marlowe, Thomas J Real-Time Computing Laboratory Department of Computer Information Science New Jersey Institute of Technology Newark NJ 07102 United States Department of Mathematics Computer Science Seton Hall University South Orange NJ 07079 United States

Significant prior work exists on scheduling for the 'simple-tasks-single-processor', 'simple-tasks-multiple-processor', and 'complex-tasks-single-processor', but few researchers have yet considered the 'complex-tasks-multiple-processor' model. We propose a new algorithm, Least Space-time First (LSTF), to deal with the general 'complex-task-multiple-processor' model. We demonstrate that LSTF outperforms the Highest-Level-First, Earliest-Deadline-First and Least-Laxity-First scheduling disciplines in the sense of minimizing maximum tardiness of a set of tasks. LSTF can gracefully incorporate some realistic overhead assumptions, including context switch and communication. The Unit Precedence Graph and Soft-Precedence Edges significantly facilitate implementation of LSTF. © 1994.

关键词： LSTF MIMD Overhead Precedence Graph Scheduling Tardiness

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Requirements for a real-time image processing language

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Annual Review in Automatic Programming 1994年第C期18卷 175-180页

作者： Laplante, P Marlowe, T Stoyenko, A Department of Mathematics and Computer Science Fairleigh Dickinson University Madison NJ 07940 United States also research faculty of the Real-Time Computing Laboratory (CIS NJIT) United States Department of Mathematics and Computer Science Seton Hall University South Orange NJ 07079 United States also research faculty of the Real-Time Computing Laboratory (CIS NJIT) United States Real-Time Computing Laboratory Department of Computer and Information Science New Jersey Institute of Technology Newark NJ 07102 United States

In this paper we discuss issues in real-time image processing, including applications, approaches and hardware. In particular, we discuss the failure of existing programming languages to support these considerations a... 详细信息

关键词： image processing multimedia programming languages real-time virtual reality

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