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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
  • 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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  • 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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  • 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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  • Priority service disciplines and voice cell discarding schemes in ATM networks

    Publication Year: 1992, Page(s):375 - 384 vol.1
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB)

    Priority service disciplines and congestion control schemes for voice and data multiplexing with bursty inputs in asynchronous transfer mode ATM/SONET broadband networks are presented. The authors consider dynamic mapping of ATM cells in the SONET payload. They propose separate buffers for voice and data to efficiently control the throughput of each traffic type. Transmission bandwidth is dynamica... View full abstract»

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  • Parameter estimation for a model of blood volume change during hemodialysis

    Publication Year: 1992, Page(s):103 - 105 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    Parameter estimation was performed for a model of blood volume change during hemodialysis. A sensitivity analysis of the effects of model parameter variation on the predicted blood volume change showed that three of eleven model parameters should be estimated. A Bayesian parameter estimator was used with data collected from fourteen maintenance hemodialysis patients. Initial results indicated that... View full abstract»

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  • 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 (244 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 ρ, μ, and Km, respectively. These margins provide the analyst with varyin... View full abstract»

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  • Linear contractivity speech coding

    Publication Year: 1992, Page(s):303 - 305 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The authors describe an elegant coding scheme that resulted in more than a 120:1 compression ratio of the speech signal. This technique is derived from the linear contractivity method of image coding and generation. The difference between the fast Fourier transforms (FFTs) of two consecutive speech frames is considered to be a two-dimensional image, then through various transformations a set of ru... View full abstract»

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  • Cross-correlation properties of a DS-CDMA communication network using MFSK modulation

    Publication Year: 1992, Page(s):371 - 374 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The author examines the correlation parameters of interest in a direct-sequence code-division multiple-access (DS-CDMA) communication network using M-ary frequency shift keying (MFSK) modulation. It is shown that the key multi-user interference parameters can be written in terms of cross-correlation functions with respect to a sinusoidal weighting function. The presence of these weighting... View full abstract»

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  • Modeling of saturation effects in the magnetizing branch of an induction motor using PSpice

    Publication Year: 1992, Page(s):513 - 516 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    The authors examine the modeling of induction motors including saturation of the magnetic core. The motor's magnetizing inductances are modeled by nonlinear functions of their exciting currents. The well-known D-Q axis model is used, and a stationary reference frame is chosen. Simulation was done by using PSpice. Results are presented for both saturated and unsaturated operation 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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  • Reliability test of interconnections using electrical noise measurement

    Publication Year: 1992, Page(s):576 - 579 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The excess electrical noise in aluminum and aluminum alloy thin films were measured. The magnitude and frequency exponent for noise spectra of 1/fα were measured as a function of the sample temperature and current density. Two different regions in plots of normalized 1/fα noise magnitude, with α between 1.2 and 2.2. versus inverse temperatu... View full abstract»

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  • A graphical programming environment for simulation of control and signal processing systems

    Publication Year: 1992, Page(s):447 - 450 vol.1
    Cited by:  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    The authors have developed a graphical programming library for control and signal processing applications. The library covers a wide range starting from basic primitives such as simple arithmetic and Boolean functions to complicated units like generalized neural networks. The user gets access to these units in the form of icons. By making connections to and from these icons, a user generates diffe... View full abstract»

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  • Neural network-based classification of electromyographic (EMG) signal during dynamic muscle contraction

    Publication Year: 1992, Page(s):99 - 102 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A neural-network-based decision making tool was developed for online classification of various neuromuscular diseases. The problem was to design an automatic classification system based on signal processing techniques such as autoregressive modeling, the short-time Fourier transform, the Wigner-Ville distribution, and chaos analysis, by defining the region of normal, and various abnormalities such... View full abstract»

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  • An examination of the accuracy of finite impulse response modeling

    Publication Year: 1992, Page(s):63 - 66 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The author examines the suitability of modeling discrete-time linear systems with a finite number of impulse response (FIR) coefficients. The FIR terms can be used to construct a model of plant transfer function. A theoretical basis for this concept is developed in the form of theorems that characterize sets of transfer functions by their FIR coefficients. To illustrate the modeling technique a fe... 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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  • 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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  • Use of VHDL synthesis in an advanced digital design course

    Publication Year: 1992, Page(s):509 - 512 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    A very-high-speed integrated-circuit hardware description language (VHDL) synthesis tool from Viewlogic is being used in an advanced digital design course. The tool has the capability of synthesizing sequential elements (flip-flops) as well as combinational logic. The tool gives students the capability of practicing a true top-down design methodology. Synthesis implementation targets used were the... View full abstract»

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  • BiCMOS gate delay analysis including temperature effect and high current transients

    Publication Year: 1992, Page(s):180 - 183 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    The model accounts for high electric field effect in the nMOS transistor and high current effects in the bipolar transistor for a wide temperature range. The analytical equations provide evaluation of the sensitivity of process and device parameters on circuit performance at different temperatures. Computer simulation results of a BiCMOS driver using the present analysis are compared with PISCES s... View full abstract»

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  • Optimal power flow by linear programming based optimization

    Publication Year: 1992, Page(s):527 - 529 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    Electric utilities in the United States utilize various linear programming techniques to achieve optimal power flow. The authors extend one such technique of linear programming based optimization for optimal power flow. Constraints for the slack bus are introduced and all branch and link flows are taken into account. This automatically puts each bus in the same flow state, thereby optimizing the e... View full abstract»

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  • Automated design of a minimum cost hybrid bus/star local area network

    Publication Year: 1992, Page(s):272 - 275 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    The authors developed a synthesis algorithm which is appropriate for use as a CAD tool in the design of a hybrid bus/star LAN. The algorithm is heuristic based, and systematically determines the layout of the physical components of the LAN. The user inputs the location of the desired stations and the CAD system determines the optimum LAN design. The locations of the network physical devices and th... View full abstract»

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  • The development of a real-time digital computer control laboratory for electrical engineering education

    Publication Year: 1992, Page(s):457 - 460 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    A project intended to substantially improve the capability of undergraduate instruction in real-time system analysis and control is discussed. The design, development, and implementation of this control educational project is reported. The laboratory consists of four experimental stations which demonstrate the typical industrial applications of process control theory. The great flexibility of micr... View full abstract»

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  • High dimension adaptive vector quantization

    Publication Year: 1992, Page(s):468 - 470 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    Adaptive vector quantization (AVQ) is presented as a waveform coding system with applications to digital voice transmission. The AVQ coding algorithms were modeled and simulated on a computer. Simulation results of higher dimensions are presented. A 20 min digitized speech was used as the source. Both quantitative and subjective tests were performed to compare the reconstructed speech with the ori... 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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  • A computer aided method for design of noninvasive indirect measurement of arterial blood pressure

    Publication Year: 1992, Page(s):772 - 775 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    A computer aided method for design of noninvasive indirect measurement of systolic, diastolic pressure and mean arterial blood pressure on the human finger is described. It was based on the vascular unloading technique and used a hydraulic adaptive control system. The error between measured blood pressure and actual human blood pressure could be controlled by using self-tuning adaptive control. Th... View full abstract»

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