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12-15 April 1992

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Displaying Results 1 - 25 of 188
  • Proceedings. IEEE SOUTHEASTCON '92 (Cat. No.92CH3094-0)

    Publication Year: 1992
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    Freely Available from IEEE
  • A tutorial comparison of three multivariable stability margins

    Publication Year: 1992, Page(s):67 - 70 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (239 KB)

    The authors compare the utilization of three multivariable stability margins for stability analysis of multivariable linear and nonlinear dynamical systems. The three margins considered are those developed by R.W. Bass (1956, 1983), J.C. Doyle (1982) and M.G. Safonov and are commonly represented by rho , mu , and K/sub m/, respectively. These margins provide the analyst with varying degrees of bot... View full abstract»

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  • Multi criteria optimization in multi connected systems of automatic control

    Publication Year: 1992, Page(s):795 - 798 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    Linear systems of automatic control with interconnected subsystems are considered. The behavior of each subsystem is characterized by a quadratic integral criterion. The problem of multicriteria optimization in such systems is formulated and solved. The solution is obtained on the basis of the principle of proportional damages, which ensures the following properties: the control of law is synthesi... View full abstract»

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  • On polynomial time algorithms for tree-decomposable graphs

    Publication Year: 1992, Page(s):150 - 154 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    Recent work in the design of efficient algorithms for optimization problems on tree-decomposable graphs concentrates on developing general approaches which lead to families of related algorithms, rather than on developing isolated ad hoc algorithms. The author extends previous results to obtain novel classes of related polynomial time algorithms for problems not previously handled by any general a... View full abstract»

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  • Optimal greedy algorithms for indifference graphs

    Publication Year: 1992, Page(s):144 - 149 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    Investigates the class of indifference graphs that models the notion of indifference relation arising in social sciences and management. The authors examine algorithmic properties of indifference graphs. Recently it has been shown that indifference graphs are characterized by a very special ordering on their sets of vertices. It is shown that this linear order can be exploited in a natural way to ... View full abstract»

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  • Exponential transient component analysis for speech modulation decomposition

    Publication Year: 1992, Page(s):299 - 302 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    A novel approach, the modulation decomposition method, to help solve the segmentation and identity problems in the development of a speech model, is described. The authors attempt to show the existence of exponential functions in the energy envelope of speech segments. These functions are expected to be basic units of acoustic modulations which can be used to model the kinematics of gestures in ut... View full abstract»

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  • Artificial bootstrap

    Publication Year: 1992, Page(s):255 - 261 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    The author investigates the migration of a process from the symbol level to the knowledge level based on one such study done on an atomic reactor. In engineering there are self-emerging processes grouped under the common term bootstrap. The nature of such bootstraps is examined in providing explanations for exotic new states in the reactor. Knowledge engineers formulate the performance of the reac... View full abstract»

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  • Single row routing with indifference graphs on the DAP

    Publication Year: 1992, Page(s):137 - 143 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The distributed array of processors (DAP) is a commercially available massively parallel machine which is often applied to numerically intensive problems which exploit its matrix manipulation abilities. It is shown that the DAP can be efficiently used to solve non-numerical problems as well. Specifically, a heuristic solution to the well-known single row routing problem in a VLSI is proposed. Inst... View full abstract»

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  • Robust impedance control of a robot manipulator with exponential tracking error convergence

    Publication Year: 1992, Page(s):425 - 429 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The authors develop a robust position/force controller based on the impedance approach without requiring exact knowledge of the robot dynamics. The controller is designed so that a desired positional trajectory can be followed along the surface of the environment while the forces exerted on the environmental surface are regulated according to a target impedance. A global exponential stability resu... View full abstract»

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  • Promoting the use of an object-oriented software development methodology by merging structured and object-oriented analysis methods

    Publication Year: 1992, Page(s):593 - 599 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    The author discusses factors that are partially responsible for the gap between the state of the art and the state of the practice for object-oriented software development methods. The focus is on identifying factors that inhibit the speed of adoption of object-oriented software development techniques and on discussing methods of addressing these inhibiting factors. A methodology is presented that... View full abstract»

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  • Coded M-ary orthogonal signal sets in DS-CDMA systems with multi-user interference

    Publication Year: 1992, Page(s):295 - 298 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The performance of M-ary orthogonal signalling in multi-user, direct-sequence spread spectrum systems is investigated. The analysis is oriented toward mobile cellular telephony, and models the performance of three coded systems. A description of system parameters is given, and their role in the analysis is described. Tradeoffs are examined between coding gain and processing gain in the re... View full abstract»

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  • Theoretical calculation of the nonlinearity of microwave diode detectors

    Publication Year: 1992, Page(s):550 - 553 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    A theoretical method for calculating the nonlinearity of diode detectors is suggested. The calculated results are presented to show the variation of the nonlinearity of a diode detector with the parameters of the diode, video impedance, and operating frequency. A comparison between the calculated results and the experimental ones presented by C.A. Hore et al. (1976) shows the validity of the metho... View full abstract»

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  • Performance analysis and traffic characterization of an Ethernet campus network to identify and develop possible SMDS applications and scenarios

    Publication Year: 1992, Page(s):389 - 391 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    Research is being conducted to investigate the roles and issues in using switched multi-megabit data services (SMDS) for metropolitan area networks (MANs). The authors introduce some of the work already done on network measurement and load modeling. They present a performance analysis of the University of Florida Campus Network, and identify some possible candidates for SMDS. Some of the questions... View full abstract»

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  • A comparison of two learning philosophies

    Publication Year: 1992, Page(s):247 - 254 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    The authors first present a learning model using class 2 dynamical systems and a learning model using class 3 dynamical systems. Then they compare these two approaches, and emphasize a unification of the two theories. The similarities of these approaches are that both schemes use the idea of storing information in stable configurations of dynamical systems. Both schemes follow the procedures of le... View full abstract»

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  • Dielectric measurements using the HP 85070A probe

    Publication Year: 1992, Page(s):83 - 86 vol.1
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The authors describe the techniques for permittivity measurements using the Hewlett Packard HP 85070A Dielectric Probe Kit. The HP 85070A probe provides a flexible means of dielectric measurements with only minimum sample preparation. Results from measurements of the dielectric constant of liquids and solids are presented for dielectric constants ranging from 2.5 to 80 and for lossless and lossy m... View full abstract»

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  • A fuzzy relaxation algorithm for matching imperfectly segmented images to models

    Publication Year: 1992, Page(s):128 - 136 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    A graph theoretic approach for matching imperfectly segmented images with stored scene models is presented. The specific segmentation errors addressed are missing objects, extra objects, missing relations, and mismeasured attributes. By combining enhanced fuzzy relaxation and association graph techniques, the method integrates global inter-object relations and local object attributes to obtain mor... View full abstract»

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  • A stable algorithm with perturbed and unmodeled systems

    Publication Year: 1992, Page(s):50 - 54 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The authors present the analysis and synthesis of a perturbed and unmodeled system based on model reference adaptive control. A novel robust adaptive control algorithm is described. By adjusting the parameter μ properly, it is concluded that the algorithm will be globally bounded within a specified region if only initial conditions are bounded. All signal vectors will tend to be exponentially s... View full abstract»

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  • A stability theorem for a class of second order nonlinear systems with an application to robotics

    Publication Year: 1992, Page(s):422 - 424 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    Optimal control theory is used to generate a feedback control which stabilizes a class of second-order nonlinear systems. Specifically, the Hamilton-Jacobi-Bellman (HJB) equation of dynamic programming is used to show that the control is the solution to a quadratic optimal control problem in which the second-order system serves as a dynamic constraint. The stability result follows from the fact th... View full abstract»

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  • Artificial neural networks and their application to power system industry

    Publication Year: 1992, Page(s):354 - 357 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A method to apply neural-network technology to the study of transient stability of electric power systems is presented. During the training phase the network is presented with a set of input and output data obtained from an offline study. After the network has obtained the ability to compute the desired output, the network is presented with the data representing different operating conditions for ... View full abstract»

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  • Using Karnaugh maps to solve Boolean equations by successive elimination

    Publication Year: 1992, Page(s):589 - 592 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    A novel Karnaugh map method for solving two-valued Boolean equations by successive elimination is presented. This method requires the construction of significantly fewer maps and is more direct than existing procedures. A feature of the method is that it distinguishes between `don't care' and `can't happen' conditions. The key concept that makes this method possible is the recognition of the impor... View full abstract»

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  • A novel method for non-invasive multispectral imaging of tissue

    Publication Year: 1992, Page(s):291 - 294 vol.1
    Cited by:  Papers (4)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    The authors have developed a novel imaging concept which is expected to meet current thermographic system specifications and provide additional information such as true spectral energy present for diagnostics. The frequency modulated reticle imaging thermal energy (FRITE) concept reduces the need for expensive two-dimensional infrared (IR) detector arrays, sometimes referred to as staring arrays. ... View full abstract»

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  • WGVMAP-a software for mapping of vector fields in waveguides

    Publication Year: 1992, Page(s):546 - 549 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    An educational software package has been developed which makes use of the personal computer for generating graphical displays of the various modes in hollow waveguides. WGVMAP is an interactive software for computing and plotting the electric and the magnetic field lines of various modes in rectangular and circular waveguides, including sectoral and circular with a conducting baffle. The user can ... View full abstract»

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  • Fiber optic pressure sensors

    Publication Year: 1992, Page(s):368 - 370 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    The authors focus on measuring static pressure with both a fiber-optic Mach-Zehnder interferometer and a single-mode fiber. They investigate the effect of such a pressure on a single-mode optical fiber. It is shown that, as predicted, anisotropic stress causes a birefringence in the fiber which in turn causes a change in the state of polarization (SOP) of the transmitted light. Since this phenomen... View full abstract»

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  • The consumer electronic bus symbol encoding sublayer: a twisted pair implementation

    Publication Year: 1992, Page(s):385 - 388 vol.1
    Cited by:  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The consumer electronic bus (CEbus) is the communication standard for home automation systems. The implementation of the consumer electronic bus physical layer symbol encoding sublayer (PLSE) is presented. The PLSE performs several functions in the CEbus node. It is responsible for decoding and encoding CEbus symbols into the proper signal duration on the physical medium. It is also responsible fo... View full abstract»

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  • Canonical representation of multivalued logic functions

    Publication Year: 1992, Page(s):242 - 246 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The authors discuss multivalued logic functions. They introduce a multivalued algebraic structure, define its properties, consider the multivalued logic function and its base, and the different canonical representations and decompositions of a multivalued logic function. The decompositions of multivalued logic functions will facilitate the derivations of test vectors for multivalued logic combinat... View full abstract»

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