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IEEE International Conference on Innovative Systems in Silicon

作者： G. Tumbush D. Bhatia Design Automation Laboratory Department of Electrical and Computer Engineering and Computer Science University of Cincinnati Cincinnati OH USA

Circuit partitioning is a very extensively studied problem. Our proposed methodology easily extends to multiple constraints that are very dominant in the design of large scale VLSI systems. In this paper we formulate the problem as a nonlinear program (NLP). The NLP is solved for the objective of minimum cutset size under the constraints of pins, area, and timing. We have tested the unified framework for area, timing, and pin constraints. The NLP is solved using the commercial LP/NLP solver MINOS. We have done extensive testing using large scale RT level benchmarks and have shown that our methods can be used for exploring the design space for obtaining constraint satisfying system designs. We also provide extensions for solving system design problems where a choice between multiple technologies, packaging components, performance, cost, yield, and more can be the constraints for design related decisions.

关键词： Timing Large-scale systems Space exploration Space technology Circuits Very large scale integration Pins System testing Benchmark testing Packaging

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Introducing the theory of fuzzy cognitive maps in distributed systems

Introducing the theory of fuzzy cognitive maps in distribute...

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IEEE International Symposium on Intelligent Control (ISIC)

作者： C.D. Stylios V.C. Georgopoulos P.P. Groumpos Laboratory for Automation and Robotics Department of Electrical and Computer Engineering University of Patras Rio Greece School of Electrical Engineering and Computer Science Ohio University Athens OH USA

This paper investigates a novel hybrid fuzzy neural system, fuzzy cognitive map (FCM), and its implementation in distributed systems and control problems. The description and the methodology of this system will be examined and then it will be shown the application of FCM in a process control problem, which will reveal the characteristics and qualities of FCM. There is an oncoming need for more autonomous and intelligent systems, which could be satisfied with the application of FCM in the field of systems and control.

关键词： Fuzzy cognitive maps Fuzzy systems Fuzzy logic Intelligent systems Robotics and automation Fuzzy control Control systems Control system synthesis Neural networks Humans

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Building interactive animations using VRML and Java

Building interactive animations using VRML and Java

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Brazilian Symposium on computer Graphics and Image Processing (SIBGRAPI)

作者： F.S. Tamiosso A.B. Raposo L.P. Magalhaes I.L.M. Ricarte Department of Computer Engineering and Industrial Automation State University of Campinas Sao Paulo Brazil Department-Computer Graphics Laboratory Computer Science University of Waterloo Waterloo ONT Canada

The paper exploits the combination of VRML (Virtual Reality Modeling Language) and Java for the construction of highly interactive animations, whose behaviour is defined in real time by a user's actions. The animations are modeled in VRML, which allows the definition of a Java program to process and generate events that determine the behaviour of scene elements. An application for the generation of Java graphical interfaces was developed, aiming to establish the communication between the user and the VRML environment, sending parameters to the program that controls the animation.

关键词： Animation Java Object oriented modeling Layout computer industry automation computer science computer graphics Virtual reality Power generation

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Working with remote VRML scenes through low-bandwidth connections

Working with remote VRML scenes through low-bandwidth connec...

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Brazilian Symposium on computer Graphics and Image Processing (SIBGRAPI)

作者： A.B. Raposo L.P. Magalhaes I.L.M. Ricarte School of Electrical and Computer Engineering FEEC Department of Computer Engineering and Industrial Automation State University of Campinas Sao Paulo Brazil Computer Science Department Computer Graphics Laboratory University of Waterloo Waterloo ONT Canada

We have developed a Web based application to accelerate the visualization of VRML scenes located in a remote server. This application enables the user to extract only the parts of a scene that are of actual interest. The extracted parts represent one or more sub trees of the hierarchical structure of the VRML scene, and only these parts will be rendered and visualized in the local computer. By reducing the complexity (size) of the remote scene, less data are transmitted from the remote server and the rendering process becomes faster in the local computer. The application is written in Java and is executed as an applet embedded in an HTML page.

关键词： Layout Java World Wide Web Application software Tactile sensors Acceleration Data visualization HTML Graphics Animation

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A Polynomial Function Discovery System — FFS

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International Journal on Artificial Intelligence Tools 1997年第1期6卷 1-13页

作者： Spyros Tzafestas Zhifang Ma Intelligent Robotics and Automation Laboratory Department of Electrical and Computer Engineering National Technical University of Athens Zografou 15773 Athens Greece On leave from the Department of Computer Science Jilin University Changchun P.R.China

This paper presents a function discovery system FFS that has two core parts: FFS-0-CORE and FFS-1-CORE. Both cores are with polynomial time complexity in discovering functions of either a•f(x)+b form or a 1 f 1 (x)+…+a n f n (x)+b form. FFS-0-CORE allows users to define their own models. FFS-1-CORE uses novel principles to increase information which helps the function discovery procedures. Three computational examples are included.

关键词： Formula discovery machine discovery machine learning artificial intelligence

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A probability-based approach to model-based path planning

A probability-based approach to model-based path planning

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IEEE International Workshop on Intelligent Robots and Systems (IROS)

作者： I. Mantegh M.R.M. Jenkin A.A. Goldenberg LRobotics and Automation Laboratory Department of Mechanical and Industrial Engineering University of Toronto Toronto ONT Canada Department of Computer Science York University North York ONT Canada

By capitalizing on the known properties of harmonic potential functions this work develops a new approach to probability-based path planning that is intuitive, free from local traps (local minima) and computationally less complex than many existing methods. Although the approach presented here is based on the hill-climbing method, it is still able to guarantee goal attainment. Furthermore the algorithm presented here is able to handle arbitrary-shaped geometries and does not require any geometrical or topological approximation at the environment representation level.

关键词： Path planning Orbital robotics Intelligent robots Collision avoidance automation Laboratories Industrial engineering computer science Mechanical factors Computational geometry

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Solving the find-path problem: a complete and less complex approach using the BIE methodology

Solving the find-path problem: a complete and less complex a...

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IEEE International Symposium on Computational Intelligence in Robotics and automation (CIRA)

作者： I. Mantegh M.R.M. Jenkin A.A. Goldenberg Robotics and Automation Laboratory Department of Mechanical and Industrial Engineering University of Toronto Toronto ONT Canada Department of Computer Science York University North York ONT Canada

Although significant progress has been made in the area of robot motion planning, many issues still need to be addressed. These include the computational complexity of navigation algorithms, their adaptability to different environments, and their sensitivity to changes in the environment. By capitalizing on the known properties of harmonic potential functions, this work develops a new approach towards model-based path planning which is intuitive, complete (goal attainability is guaranteed), free from local traps (local minima) and computationally less complex than many existing methods. Extending the advantages of hill-climbing method, which have low space and time complexity, to a global (model-based) path planning algorithm marks one of the major contributions of this work. Furthermore, the algorithm presented here is able to handle arbitrary geometries and does not require a geometrical or topological approximation at the environment representation level.

关键词： Path planning Orbital robotics Navigation Motion planning Robot sensing systems Intelligent robots Collision avoidance Geometry Robotics and automation Laboratories

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A register pressure sensitive instruction scheduler for dynamic issue processors

A register pressure sensitive instruction scheduler for dyna...

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International Conference on Parallel Architecture and Compilation Techniques (PACT)

作者： R. Silvera Jian Wang G.R. Gao R. Govindarajan IBM Toronto Laboratory North York ONT Canada Nortel Montreal Laboratory Nuns Island QUE Canada Department of Electrical and Computer Engineering University of Delaware Newark DE USA Supercomputer Edn. & Research Center Department of Computer Science & Automation Indian Institute of Science Bangalore India

Several modern superscalar processors contain an out-of-order (OOO) instruction issue mechanism, which resolves dependencies between instructions to expose greater instruction-level parallelism (ILP). How to extend a traditional instruction scheduler to take advantage of these hardware resources has presented both a challenge and an opportunity for compiler design. In this paper, we present a new approach for instruction scheduling, which reorders the instructions in a traditional instruction schedule to reduce its register pressure while maintaining the amount of ILP exploitable by the target OOO processor. This may prevent the introduction of spill code, thus producing a performance improvement. We have implemented our instruction scheduler under the MOST scheduling testbed. Our experiments show that the proposed approach reduces the register pressure by 12.81% in SPEC92 benchmark loops which do not require any spill code. For loops with a high register pressure, our approach reduced the amount of spill code required by an average of 32.08% and produced an average performance improvement of 8.79%.

关键词： Processor scheduling Registers Marine vehicles Testing Scheduling algorithm Degradation Assembly Dynamic scheduling Hazards

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Fault detection filter for linear time varying systems: An algebraic-geometric approach 4

Fault detection filter for linear time varying systems: An a...

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4th European Control Conference, ECC 1997

作者： Szigeti, F. Bokor, J. Edelmayer, A. Tarantino, R. Department of Control Engineering Faculty Universidad de los Andes Mérida5101 Venezuela Systems and Control Laboratory Computer and Automation Institute Hungarian Academy of Science XI Kende u. 13-17 BudapestH1111 Hungary Maraven Oil Refinery Punta Cardon Venezuela Universidad de Los Andes Mérida5101 Venezuela

ISBN: (纸本)9783952426906

In this paper we consider the fault isolation problem for the linear time varying systems. Our approach is based on characterization of the observability of LTV systems by Kalman's rank condition, which permits us to design fault detection filters, feeding also the derivatives of the inputs and the outputs. We prove, using a computable method, that the isolation problem can be solved by generalized Luenberger's observer if and only if the detectability and the weak separability of fault signatures holds.

关键词： Observability

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Developing a prototype concurrent design tool for composite topside structures

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 279-290页

作者： Dirlik, S Hambric, S Azarm, S Marquardt, M Hellman, A Bartlett, S Castelli, V Steve Dirlik:began his career at the Naval Surface Warfare Center Carderock Division in 1981 as an aerospace engineer co-op student. He completed his bachelor of science degree in aeropace and ocean engineering from Virginia Polytechnic Institute and State University in 1985 and his master of science degree in aerospace engineering from the University of Maryland in 1990. Mr. Dirlik recently completed a master of science program in applied physics at The Johns Hopins University and currently works in the Radar Cross Section and Target Physics Branch of the Signatures Directorate at the Naval Surface Warfare Center Corderoke Division. He has worked on Navy low observable programs since 1990. Stephen Hambric:is a research associate at the Applied Research Laboratory at The Pennsylvania State University. He received his B. S. and M.S. degree in mechanical engineering from Virginia Polytechnic Institute and State University and his D. Sc. in mechnical engineering from the George Washington University. He has worked on several computer aided multidiscikplinary design and optimization projects over the years including an automated propeller design system and a structural acoustic optimization capability. Dr. Shpour Azarm:is currently working as an associate professor with the Design and Manufacturing Group of the Department of Mechanical Engineering at the University of maryland at College Park. Dr Azarm's expertise is in the areas of optimization-based designed and concurrent design and optimization of multidisciplinary systems. He was a consultant at Black & Decker Corporation (summer 1996) and worked as a Navy senior summer faculty fellow (summer 1995) and a NASA summer faculty fellow (summer 1994). He was a visiting scientist at NASA Langley Research Center for Multidisciplinary Analysis and Applied Structural Optimzatiom at the University of Siegen in Germany (spring 1992) and the Design Institute of the Technical University of Denmark (summer 1990). Dr Azarm was an associate technical editor of the ASME Jour

A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent engineering of Layered Structures, provides designers with an immediate assessment of the impacts of their decisions on several disciplines which are important to the performance of a modern naval topside structure, including electromagnetic interference effects (EMI), radar cross section (RCS), structural integrity, cost, and weight. Preliminary analysis modules in each of these disciplines are integrated to operate from a common set of design variables and a common materials database. Performance in each discipline and an overall fitness function for the concept are then evaluated. A graphical user interface (GUI) is used to define requirements and to display the results from the technical analysis modules. Optimization techniques, including feasible sequential quadratic programming (FSQP) and exhaustive search are used to modify the design variables to satisfy all requirements simultaneously. The development of this tool, the technical modules, and their integration are discussed noting the decisions and compromises required to develop and integrate the modules into a prototype conceptual design tool.

关键词： Warships

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