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5th International Conference on Document Analysis and Recognition, ICDAR 1999

作者： Li, Xingyuan Doermann, David Oh, Weon-Geun Gao, Wen Dept. of Computer Science and Engineering Harbin Institute of Technology Harbin150001 China Center for Automation Research University of Maryland College ParkMD20742 United States Computer Vision Lab. Systems Engineering Research Institute Yusong Taejon305-600 Korea Republic of Datacap Inc. TarrytownNY10591 United States

ISBN: (纸本)0769503187

This paper proposes a strategy for analyzing unknown, filled forms. First, horizontal and vertical line segments are detected, extracted and filtered. A recursive splitting and merging algorithm eliminates overlapping segments, filters false segments, and groups the segments into lines. Based on the extracted lines, an algorithm for rectangle extraction is proposed. We define the constraints between rectangles and edges. In a process of scanning the horizontal and vertical lines, candidate edges are validated and rectangles are generated if its surrounding edges and their combination are all valid. The process is recursively applied. It can tolerate large breaks in form lines, ignore irrelevant segments and deal with embedded rectangles. Experiments on a collection of forms show that our approach works well on poor quality images. © 1999 IEEE.

关键词： Geometry

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A formal model of the Ada Ravenscar tasking profile;delay until 99

A formal model of the Ada Ravenscar tasking profile;delay un...

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Proceedings of the 1999 annual ACM SIGAda international conference on Ada

作者： Kristina Lundqvist Lars Asplund Uppsala University Information Technology Dept. of Computer Systems P.O. Box 325 S-751 05 Uppsala Sweden

ISBN: (纸本)9781581131277

The definition of the Ravenscar Tasking Profile for Ada 95 provides a definition of a tasking runtime system with deterministic behaviour and low enough complexity to permit a formal description and verification of the model. A complete run-time system is being modeled using the real-time model checker UPPAAL, and this work describes the handling of delay until. Since scheduling is not yet modelled a simple non-preemptive scheduler has been used when verifying the delay queue.

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Industrial evaluation of DRAM tests

Industrial evaluation of DRAM tests

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Design, Automation and Test in Europe Conference and Exhibition

作者： A.J. van de Goer J. de Neef Dept. of Electr. Eng. Delft Univ. of Technol. Netherlands Faculty of Information Technology and Systems Department of Electrical Engineering Section Computer Architecture and Digital Technique Delft University of Technnology Delft Netherlands

This paper presents the results of 44 well known memory tests applied to 1896 1M*4 DRAM chips, using up to 96 different stress combinations with each test. The results show the importance of selecting the right stress combination, and that the theoretically better tests (i.e. those covering different functional faults) also have a higher fault coverage. However the currently used fault models still leave much to be explained; e.g., the used data backgrounds and address orders show an unexplainable large variation in fault coverage.

关键词： Random access memory Testing Stress Leakage current Indium phosphide Information technology computer architecture Postal services Hip Electronic switching systems

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A model for predicting the reflection coefficient for hollow pyramidal absorbers

A model for predicting the reflection coefficient for hollow...

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1999 IEEE International Symposium on Electromagnetic Compatibility, EMC 1999

作者： Holloway, Christopher L. Kuester, Edward F. Johansson, Martin Johnk, Robert T. Novotny, David R. Institute for Telecommunication Sciences/NTIA 325 Broadway BoulderCO80303 United States Dept. of Electrical and Computer Engineering University of Colorado BoulderCO80302 United States Core Unit Antenna Technologies Ericsson Microwave Systems MolndalSE43184 Sweden RF Fields Division National Institute of Standards and Technology BoulderCO80303 United States

ISBN: (纸本)078035057X

We present an expression for the effective material properties of electromagnetic hollow pyramidal absorbers. This expression can be used to efficiently calculate the reflection coefficient of this absorbing structure. The reflection coefficients based on this model have been compared to and closely agree with calculated finite element results. We show how the reflection coefficient varies as a function of the absorber wall thickness. Measurement data for a hollow absorber obtained using time-domain measurement techniques are also presented. © 1999 IEEE.

关键词： Reflection

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A powerful algorithm for distribution systems analysis

A powerful algorithm for distribution systems analysis

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IEEE International Conference on Electronics, Circuits and systems (ICECS)

作者： A.N. Kartas D.K. Tsanakas Dept. of Electr. Eng. & Comput. Technol. Patras Univ. Greece Electrical Engineering & Computer Technology Department Power Systems Laboratory University of Patras Rion Greece

This paper presents a powerful method for distribution systems analysis. The algorithm developed is based on a robust power flow method using a multi-port Thevenin equivalent circuit technique and basic formulation of Kirchhoff's laws. This algorithm is implemented with an efficient method to store the network topology using trees and linked lists data structures. The program for this power flow technique was developed on an IBM compatible PC using Turbo-Pascal and successfully applied to several real distribution networks.

关键词： Algorithm design and analysis Load flow Substations Load flow analysis Robustness Tree data structures Power system analysis computing Circuits Data structures Voltage

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Novel fuzzy-neural network with general parameter learning applied to sliding mode control systems

Novel fuzzy-neural network with general parameter learning a...

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IEEE International Conference on systems, Man and Cybernetics

作者： Y. Tamal D. Akhmetov Y. Dote Dept. of Comput. Sci. & Syst. Eng. Muroran Inst. of Technol. Hokkaido Japan Department of Computer Science and Systems Engineering Muroran Institute of Technology Mizumoto Japan

This paper proposes a novel fuzzy-neural network for chattering free sliding mode control. Firstly, soft computing which is the fusion or combination of fuzzy systems, neural networks and genetic algorithms is studied. Then, by taking advantages of fuzzy systems and neural networks a novel fuzzy-neural network with a general parameter learning algorithm and system structure determination is developed. The network is based on a local basis function network. The general parameter method (GP) is based on GMDH (group methods of data handling). The GP is used for a learning algorithm and the structure determination of the developed fuzzy neural network. As the resulting network needs only fuzzy inference computation with GP calculations, which is, generally speaking, the combination of soft and hard computing, called computational intelligence, is suitable to solve nonlinear problems, it especially needs a little computation time. Therefore, it is easy to implement with a HITACHI RISC+DSP microprocessor fast enough for real time operations. The developed signal processor is self-organizing, self-tuning and automated designed. In order to confirm the feasibility of fault diagnosis performance by the developed network, it is applied to chattering free sliding mode control. It is found that the developed method is suitable to other nonlinear control methods.

关键词： computer networks Sliding mode control Genetic programming Fuzzy systems Neural networks Signal processing algorithms Fuzzy neural networks Genetic algorithms Data handling Inference algorithms

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RNS implementation of FIR filters based on distributed arithmetic using field-programmable logic

RNS implementation of FIR filters based on distributed arith...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： A. Garcia U. Meyer-Base A. Lloris F.J. Taylor Dept. of Electron. & Comput. Technol. Granada Univ. Spain Department of Electronics and Computer Technology University of Granada Granada Spain High-Speed Digital Architecture Laboratory University of Florida Gainesville FL USA

Field-programmable logic (FPL) densities and performance have steadily improved, allowing DSP solutions to be integrated on a single FPL chip. The primary limitation of FPLs, in DSP-centric applications, is their intrinsically weak arithmetic performance compared to DSP microprocessors and ASICs. In some cases, distributed arithmetic (DA) has been used to mask FPL arithmetic inadequacies. The Residue Number System (RNS) has demonstrated an ability to support high-bandwidth arithmetic with limited resources. This paper presents a methodology for merging distributed arithmetic with the residue number systems to achieve high-performance FPL solutions.

关键词： Finite impulse response filter Logic Table lookup Digital signal processing Digital signal processing chips Dynamic range Field programmable gate arrays Digital arithmetic Application software Microprocessors

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Real-time Path Planning for Intelligent Robots System Based on Vision Information

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IFAC Proceedings Volumes 1999年第2期32卷 861-866页

作者： Qingchun Meng Changjiu Zhou K. Jagannathan K.S. Leong Hongbo Ji Department of Electronics & Communication Engineering of Singapore Polytechnic 139651 Tel: 65 7721440 Fax: 65 7721974. Singapore Computer Science Dept. of Yantai University 264005 Yantai China State Key Lab. of Intelligent Technology & Systems of Tsinghua University 100084 Beijing China

Real-time path planning is a key subject in the research of a Multi-robot system, such as in soccer robot system, as in such system there are several robots to coordinate to complete one task and its workspace is time-varying. There exist unpredictable changes in such workspace. These changes will make the robots path planning tremendously hard. This paper introduce the study on the real-time planning of a multi-robot system, such as soccer robots system. In such systems, as there exist multiple mobile robots, robots path planning is highly required of real-time and of high path planning quality. In this paper, the definitions of Active Obstacle and Dominating Robot are put forward. Genetic-planning and Fuzzy-correction are developed as our path planning techniques. The concept of Sector Vital Value is proposed for Genetic-planning and Fuzzy-correction. Block-Inserting strategy is employed to further improve the system's real-time performance in the workspace modelization. It takes only 2% of workspace modeling time required by Grid-modeling technique. After taking the proposed measures, the system's real-time performance is improved a lot. The initial simulation shows that our planning strategy can meet real-time demand.

关键词： Multi-agent System Path Planning Fuzzy Logic Genetic Algorithms

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Finite element based Kerr electro-optic reconstructions of space charge

Finite element based Kerr electro-optic reconstructions of s...

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Conference on Electrical Insulation and Dielectric Phenomena, (CEIDP)

作者： A. Ustundag M. Zahn Dept. of Electr. Eng. & Comput. Sci. MIT Cambridge MA USA Department of Electrical Engineering and Computer Science Laboratory for Electromagnetic and Electronic Systems Massachusetts Institute of Technology Cambridge MA USA

Recent advances in Kerr electro-optic measurement theory resulted in various promising algorithms that can reconstruct the electric field and/or space charge density from optical data. In particular the finite element based Kerr electro-optic reconstruction algorithm (FEBKER) calculates the space charge density directly to avoid the numerical problems associated with taking the gradient of the electric field, uses single parameter intensity measurements to enable transient analysis which otherwise is difficult since multiple parameter intensity measurements is slow due to the rotation of polarizers, and is capable of reconstruction even when the number of measurements are limited by the window size of the experimental set-up. In this paper we apply FEBKER to synthetic Kerr electro-optic data obtained for a point/plane electrode geometry in transformer oil with a specified space charge density distribution. The performance of the algorithm is tested. The impact of experimental error is analyzed by incorporating random error to the synthetic data. Regularization techniques that decrease the impact of experimental noise are applied.

关键词： Finite element methods Density measurement Current measurement Charge measurement Electric variables measurement Space charge Rotation measurement Particle measurements Size measurement Reconstruction algorithms

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Science and Engineering for Software Development: A Recognition of Harlan ***' Legacy 99

Science and Engineering for Software Development: A Recognit...

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1999 International Conference on Softeare Engineering

作者： Victor Basili Tom DeMarco Ali Mili Dept. of Computer Science University of Maryland College park MD The Atlantic Systems Guild 353 West 12th Street New York NY Inst. for Software Research 1000 Technology Drive Fairmont WV

This colloquium is organized in honor of Dr Harlan *** (1919-1996), and is intended to celebrate his legacy in the theory and practice of software engineering.

ISBN: (纸本)9781581130744

This colloquium is organized in honor of Dr Harlan *** (1919-1996), and is intended to celebrate his legacy in the theory and practice of software engineering.

关键词： Software design computer software Software engineering Legacy Engineering Pride Science colloquia

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