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25-28 March 1999

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Displaying Results 1 - 25 of 75
  • Proceedings IEEE Southeastcon'99. Technology on the Brink of 2000 (Cat. No.99CH36300)

    Publication Year: 1999
    Request permission for commercial reuse | PDF file iconPDF (427 KB)
    Freely Available from IEEE
  • Authors list

    Publication Year: 1999, Page(s):340 - 341
    Request permission for commercial reuse | PDF file iconPDF (107 KB)
    Freely Available from IEEE
  • A novel MIMO fuzzy model

    Publication Year: 1999, Page(s):21 - 24
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A novel method for the construction of multi-input-multi-output (MIMO) fuzzy logic systems is proposed. A training algorithm for this MIMO fuzzy model, based on the backpropagation (BP) technique, is also given. Comparing to the conventional modeling method, the MIMO fuzzy model described is less complex due to a smaller number of adjustable parameters. Besides, its training time is decreased as m... View full abstract»

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  • Approximating state sets using circumscribing polyhedron with fewer facets

    Publication Year: 1999, Page(s):14 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    A polyhedron can be described using a set of linear constraints that bound the polyhedron. This paper considers the problem of approximating a polyhedron with a circumscribing polyhedron with fewer constraints. We discuss three methods to find such a circumscribing polyhedra, and compare the resulting approximation errors using sets of randomly generated polyhedra. The work is motivated by the pro... View full abstract»

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  • Linear controller for robust tracking of uncertain time-delay systems

    Publication Year: 1999, Page(s):1 - 9
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    We consider a class of linear time-delay dynamic systems containing uncertain elements. The plant and input matrices of the system are uncertain and the plant states have retarded arguments. The only information available about the uncertain parameters is the bounding sets in which they lie. A linear controller is developed to force the output of the uncertain time-delay system to track the output... View full abstract»

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  • An interior-point method for finding a DC solution of nonlinear circuits

    Publication Year: 1999, Page(s):288 - 291
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    Some problems in DC nonlinear circuits and steady state simulations demonstrate slow convergence using the global Newton-Ralphson (NR) method. This paper presents a new technique for dealing with the convergence problems that Newton-Ralphson based methods encounter. This method is based on an interior-point concept and an affine scaling used in the linear programming. Issues related to the impleme... View full abstract»

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  • Delivery of an introduction Power Systems course

    Publication Year: 1999, Page(s):142 - 144
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    An introductory course in Power Systems was conceived at the University of North Florida (UNF) because power companies have power-generating plants in Jacksonville, the location of UNF. The course, Introduction to Power Systems is offered for the third year as an elective for students in the Systems Design track. In order to satisfy the design component requirement of the Accreditation Board for E... View full abstract»

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  • Computation of effective permittivity of a 2-D periodic structure by T-matrix algorithm

    Publication Year: 1999, Page(s):329 - 332
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    We consider the scattering of a plane wave from a finite collection of two-dimensional dielectric scatterers that are arranged periodically in free space. The T-matrix algorithm is applied to solve for the scattered field. The effective permittivity of the collection is then computed using a minimization technique. Comparisons with the Polder-Van Santen (1946) mixing formula are made View full abstract»

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  • Certified exchange of electronic mail (CEEM)

    Publication Year: 1999, Page(s):40 - 43
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Email has become one of the most important Internet applications in our daily lives. It has many advantages over the postal mail (paper-based mail). In contrast, Email has faster delivery with no regards to the distance or the place of the originator and the recipient. Therefore, email tends to replace some of the paper-based postal mail services with more efficient and advanced services. In order... View full abstract»

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  • Dynamic system control using slack descriptor models

    Publication Year: 1999, Page(s):67 - 69
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    Various techniques have been developed for controlling dynamic systems subject to model or input uncertainties. The slack descriptor systems model proposed by Holloway (1993) addresses such uncertainties as well as systems that have observation cost (uncertainty due to lack of samples). Here we consider some preliminary approaches to the control of systems modeled by slack descriptors, and show si... View full abstract»

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  • Agent-host mutual authentication

    Publication Year: 1999, Page(s):180 - 184
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    As an alternative to the present client/server applications on the Internet, researchers in universities and industry are trying to define a secure agent infrastructure which can protect both the agent and the agent place (server, ducking place). The main advantage of the agent is that it can move (roam) on the Internet searching for answers for the users. Such feature saves a lot of bandwidth as ... View full abstract»

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  • Breakdown voltage behavior of PET thermoplastics at DC and AC voltages

    Publication Year: 1999, Page(s):284 - 287
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The demand on thermoplastic encapsulation of coils and electronic devices has been increased recently as an alternative to thermosets for electrical insulation, heat dissipation and physical protection of the encapsulated devices from harsh environmental operating conditions. Compared with thermosets, thermoplastics offer excellent electrical properties, superior surface hardness, excellent dimens... View full abstract»

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  • An implementation of a real-time experimental/analysis system for the energy conversion laboratory

    Publication Year: 1999, Page(s):138 - 141
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This paper presents a system for visually analyzing the electromagnetic fields of electrical machines used in the energy conversion laboratory. The system utilizes the finite element method as well as various modules to achieve a real-time effect in the analysis of electrical machines while hands-on experimentation is in progress. The proposed system is aimed at developing a tool that would help i... View full abstract»

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  • Reduced order modeling of thin wire scatterers

    Publication Year: 1999, Page(s):323 - 328
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    We present an efficient method of calculating the scattered electric field from thin wires for broadband solutions. The method is based on the method of moments and adapts techniques from asymptotic waveform evaluation. It is found that for applications which require a large number of frequencies be evaluated, the method produces very accurate results with considerable savings in computation time View full abstract»

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  • Fast search algorithms for continuous speech recognition

    Publication Year: 1999, Page(s):36 - 39
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The most important component of a state-of-the-art speech recognition system is the decoder, or search engine. Given this importance, it is no surprise that many algorithms have been devised which attempt to increase the efficiency of the search process while maintaining the quality of the recognition hypotheses. In this paper, we present a Viterbi decoder which uses a two-pass fast-match search t... View full abstract»

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  • Feedback on a ball balancer

    Publication Year: 1999, Page(s):64 - 66
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    The open loop transfer function of a ball balancer shows it to be unstable. Application of a feedback loop is required to stabilize it. This paper provides a practical touch to the undergraduate linear control systems course, where compensation is commonly and theoretically applied in various control systems to achieve stability and in which no practical insight is provided as to what constitutes ... View full abstract»

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  • Electromagnetic pulley with a ferromagnetic shunt in zone of unloading

    Publication Year: 1999, Page(s):203 - 209
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    In this paper on the basis of the consideration of forces acting on a ferromagnetic body in the unloading zone of a pulley separator, the existence and the length of the return zone are determined, the body hitting into it comes back to the pulley, without unloading; it is shown, that the efficiency of the offered application (between return run and pulley) of a ferromagnetic shunt-plate of trapez... View full abstract»

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  • Blur identification and correction for a given imaging system

    Publication Year: 1999, Page(s):268 - 273
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Estimating the blur function is the first step in all the image restoration techniques. A priori knowledge of the blur phenomenon helps improve the quality and certainty of image restoration. In this paper, a method of estimating the blur function for imaging setups that are not subject to change, for example surveillance cameras, is developed using the Wiener filter. A random noise image is used ... View full abstract»

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  • QPSK communications using short 4-ary codes

    Publication Year: 1999, Page(s):176 - 179
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Error control coding matched to the number of symbols of quaternary phase shift keying (QPSK) is considered in this paper. Short nonbinary codes with a set of 4 symbols are used in conjunction with QPSK for improved error performance. These 4-ary symbols match the number of phases used in communicating QPSK. The improved performance relative to uncoded QPSK is demonstrated in terms of equivalent b... View full abstract»

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  • Interactive Web-based tutorials for engineering education

    Publication Year: 1999, Page(s):126 - 127
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    The RAISE (Remote Asynchronous Instruction in Science and Engineering) program at the University of Louisville provides online support for classes. One feature of RAISE is the interactive tutorial. Each tutorial is a series of HTML documents that includes JavaScript to allow for response to student input. A typical tutorial poses a problem to the student, then helps the student solve the problem b... View full abstract»

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  • Benchmark circuits for analog and mixed-signal testing

    Publication Year: 1999, Page(s):217 - 220
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    This paper proposes a standard set of fault models and establishes acceptable component variations for a new set of benchmark circuits used to evaluate analog and mixed-signal testing techniques View full abstract»

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  • A study of power factor and harmonics in switched-mode power supplies

    Publication Year: 1999, Page(s):278 - 283
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Power factor and harmonic characteristics of high frequency switched-mode power supply systems operating in discontinuous inductor current mode are studied in this paper. The study is based on the fact that virtually all power factor correction (PFC) converters use a few basic converter topologies as their input stages. It is found that these converters present distinctive harmonic behaviors. Harm... View full abstract»

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  • Integrated software support for a course on computer organization and assembly language

    Publication Year: 1999, Page(s):134 - 137
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    Curricula in computer engineering and computer science usually offer a mandatory course in machine and assembly language. This paper describes an integrated teaching tool for such a course, and classroom experience with using it. The tool consists of trainers for number systems and conversions, a simulator for a simple processor, an assembler for this processor, and a linker. Teaching experience h... View full abstract»

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  • Extending ESPRIT algorithm by using virtual array and Moore-Penrose general inverse techniques

    Publication Year: 1999, Page(s):315 - 318
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    High-resolution signal parameter estimation is frequently studied in many signal processing applications. In this paper, we present a new high-resolution direction and frequency simultaneous estimation algorithm, which extends the ESPRIT algorithm by using the Moore-Penrose general inverse and virtual array techniques. By using this new algorithm, the parameter pair (θi,fi View full abstract»

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  • The quasistatic analysis of a new modified coplanar coupling waveguide

    Publication Year: 1999, Page(s):246 - 248
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    A new modified coplanar coupling waveguide is analyzed by using exact and approximate conformal mapping techniques. The closed-form expressions of the effective dielectric constant and characteristic impedance of the structure are derived. Numerical results that show the properties of the structure are presented View full abstract»

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