Southeastcon '94. Creative Technology Transfer - A Global Affair., Proceedings of the 1994 IEEE

10-13 April 1994

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  • Proceedings of SOUTHEASTCON '94

    Publication Year: 1994
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  • A study of satellite channel utilization in the presence of rain attenuation in Florida

    Publication Year: 1994, Page(s):196 - 200
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Rain attenuation is the most dominant cause of signal degradation in satellite links operating at Ka-band. This is a particularly serious issue for ground terminal stations located in a sub-tropical region such as state of Florida. Presently, most rain compensation algorithms are based on the use of a fixed, large fade margin to combat occasional deep fades. However, the use of a fixed margin, esp... View full abstract»

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  • Quasi-static characteristic of a shielded cylindrical coupled microstrip transmission line by finite-element method

    Publication Year: 1994, Page(s):170 - 174
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This paper presents a finite-element method of numerical analysis for a system of a shielded cylindrical coupled microstrip transmission lines. The complete polynomial field of the high order element up to fourth is used in this study. The microstrip line consists of two coupled dielectric circular cylinders characterized by permittivity ε1 and ε2 and partially embe... View full abstract»

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  • Forecasting peak loads with neural networks

    Publication Year: 1994, Page(s):351 - 356
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    This paper presents a new approach to power load forecasting using artificial neural networks (ANN). Based on weather conditions and past history of load consumption, a load forecast is made by the utility companies to deliver the appropriate load to its customers. Power systems operation and planning functions such as unit commitment, security analysis, state estimation, etc. are benefited with a... View full abstract»

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  • Rapid prototyping and performance evaluation of recoded multipliers using FPGAs

    Publication Year: 1994, Page(s):236 - 240
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    High speed recoded parallel multipliers constitute an affordable improvement compared to the serial-parallel add-shift designs. We present in this paper, a detailed discussion of the development of these recoded multiplier algorithms and their FPGA implementations. The various issues involved in the design process are highlighted. The cost-performance comparison of the various recoded multipliers ... View full abstract»

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  • Cart-pendulum balancing problem using fuzzy logic control

    Publication Year: 1994, Page(s):393 - 397
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    The paper presents the development of a fuzzy rule-based controller to solve the cart-pendulum balancing problem in real time. This approach is based on approximate reasoning and knowledge-based control. It is of substantial interest since the non-linear behavior of the system makes the design of an analytical conventional controller very complex. The controller design and the simulation results a... View full abstract»

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  • Performance of selection diversity systems in a Nakagami fading environment

    Publication Year: 1994, Page(s):190 - 195
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Closed form results for the symbol error probabilities are derived for M-ary, L branch selection diversity system in a Nakagami fading environment using noncoherent frequency-shift keying modulation. The maximum SNR selection and the maximum output selection schemes are considered. The analysis is not limited to integer values of the Nakagami fading parameter m. Results for the Rayleigh fading cha... View full abstract»

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  • Motor start program

    Publication Year: 1994, Page(s):35 - 39
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The motor start program calculates the starting current and voltage drop of an induction motor on three phase delta or wye and two phase open delta systems. Currents and voltage drops are calculated for across-the-line starting and autotransformer starting. The program can determine the suitable current to be set in a solid state starter if the percentage of the voltage drop exceeds a certain valu... View full abstract»

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  • Stationary and cyclostationary random process models

    Publication Year: 1994, Page(s):450 - 454
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    Cyclostationary random process modeling is an area of signal processing that has been the subject of numerous journal papers. W.A. Gardner (1988) devoted half of a book to cyclic spectral analysis. Cyclostationarity, however, has not received very much attention at regional conferences in the recent past, which implies that it is not being utilized by many practising engineers. Therefore, this pap... View full abstract»

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  • Electromagnetic field scattering by an inhomogeneous composite circular cylinder

    Publication Year: 1994, Page(s):165 - 169
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The scattering of electromagnetic field by an inhomogeneous composite cylinder is presented. The inhomogeneous composite circular cylinder is illuminated by a line source or plane wave in free space. The analysis of the problem involves applying the field equivalence principle to derive for each excitation (TE or TM) a system of coupled integral equations for the equivalent magnetic currents on th... View full abstract»

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  • A new class of fuzzy neural networks with application in system modeling

    Publication Year: 1994, Page(s):348 - 350
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    This paper presents a new class of fuzzy neural networks and its application to system modeling. The optimal set of fuzzy associative memory rules and weights can be identified for a given set of sample data. Test results of modeling a nonlinear system show that the proposed fuzzy neural network can accurately model a complicated nonlinear system and the model is quite robust in the sense that its... View full abstract»

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  • Nonparametric approach to reliability analysis

    Publication Year: 1994, Page(s):231 - 235
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    The object of this paper is to propose a developed nonparametric statistical procedure as an alternative to the classical approach for reliability analysis. We will propose an effective distribution-free procedure to characterize the probabilistic behavior of the failure data, which cannot be identified as those from a classical probability distribution. In addition to offering the computational a... View full abstract»

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  • I/O performance analysis for network file servers

    Publication Year: 1994, Page(s):386 - 392
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    The paper presents a performance simulation analysis of different disk storage techniques in typical network file server environments, based on personal computers (PCs). One of the key issues investigated is whether a disk array can outperform a group of independent, non-striped disks of the same type and data capacity View full abstract»

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  • Temporal gain and energy density profiles for a carbon dioxide laser beam amplifier

    Publication Year: 1994, Page(s):67 - 69
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    The four-temperature kinetic model of Harrach and Einwohner is used to study the performance of a carbon dioxide electron-beam initiated laser amplifier. The model takes into account the effect of adding nitrogen and helium gases, radiation terms and the temperature dependence of vibrational energy transfer rates. Based on this model, a program was written in automatic continuous simulation langua... View full abstract»

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  • Finite wordlength effects in fixed-point 2-D digital filters

    Publication Year: 1994, Page(s):16 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The stability of 2D digital filters implemented with two's complement quantization is investigated. The difference equation model is considered for the following cases: quantization after each product, and quantization after a complete sum of products. For both cases, sufficient conditions are established for asymptotic stability. The 2-D state-space Roesser's model is also considered under two's ... View full abstract»

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  • Voltage maps simplify electric circuit analysis

    Publication Year: 1994, Page(s):185 - 189
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    The pioneering work over 50 years ago by M.I.T. faculty who wrote textbooks for the study of electrical sciences set the pattern for the study of electric circuits in the United States. Authors who developed textbooks after those early works largely followed the techniques advanced there. This paper extends the analytical procedures adopted for identifying current direction and voltage polarities ... View full abstract»

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  • A reliability function in the three dimensional parametric space and the study of digital systems

    Publication Year: 1994, Page(s):251 - 253
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    The reliability of various digital systems are discussed, and an equation for the reliability function is obtained using Markov model with three parameters View full abstract»

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  • Closed loop control of a slip energy recovery system-practical results

    Publication Year: 1994, Page(s):30 - 34
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    In this paper, the output response of speed and current controllers are presented for a slip energy recovery drive system that is perturbed by the negative step inputs in mechanical power. The operating region of the controllers in terms of the DC link current as a function of the rotor speed is obtained View full abstract»

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  • Evolution of multi-valley electron distributions in GaAs

    Publication Year: 1994, Page(s):447 - 449
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    An approach based on the physical evolution of the distribution function in the energy relaxation scale is used to study multi-valley distribution functions of electrons in GaAs subjected to a rapid change in electric field. This approach, which assumes the distribution can be determined by mean energy, is able to describe transport phenomena, including inter-valley transitions, in the scale as sm... View full abstract»

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  • Design robustness assessment-a technical overview

    Publication Year: 1994, Page(s):435 - 439
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Design robustness assessment (DRA) is a technique for quantifying the design robustness of electronics-based products through empirical testing. The DRA technique was developed and refined within IBM, and has been applied during the development phase of most IBM Personal System/2 products, including systems, options and peripherals. DRA has proven to be an effective technique for finding latent de... View full abstract»

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  • Application of three dimensional image analysis to the mammalian cell nucleus

    Publication Year: 1994, Page(s):98 - 100
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    A three dimensional image segmentation and analysis system is proposed to study the confocal microscopy images of DNA replication sites in cell nuclei. The algorithm presented here includes detection of replication sites in 2D slices in the image and reconstructing 3D objects from 2D data. We also present a user interface to allow easy interaction with both the segmentation algorithm and the 3D se... View full abstract»

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  • Artificial neural network for the inverse electromagnetic problem of system identification

    Publication Year: 1994, Page(s):162 - 164
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    An approach which is based on the use of artificial neural networks and finite element analysis is used to solve the inverse problem of system identification. The approach is used on a test problem to identify location, material and values of unknown sources within an inaccessible region. A comparison of actual and predicted values of the unknown parameters demonstrates the validity of this approa... View full abstract»

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  • Biologically motivated servomechanism controller design

    Publication Year: 1994, Page(s):329 - 333
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    A simple classical control system is designed for a human like (HL) robot joint. First, detailed development of the joint's dynamic model is presented, Then a classical design procedure is implemented for the design of a proportional controller. A numerical example is provided and simulation results are presented for illustration. The limitations of the designed controller are discussed and recomm... View full abstract»

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  • A genetic algorithm-based approach to economic dispatch of power systems

    Publication Year: 1994, Page(s):212 - 216
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    In view of the Clean Air Act (CAA) of 1990, the economic dispatch problem considering the compensating generation plan provided in the Act is nonlinear, ill-structured and multimodal. This paper presents a genetic algorithm (GA) based approach to solve this problem. Test results show that the genetic algorithm-based approach produces significantly better solutions compared against those obtained u... View full abstract»

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  • DSP controller for a permanent magnet synchronous motor drive

    Publication Year: 1994, Page(s):413 - 417
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    The drives industry is steadily moving towards digital implementation of controllers for variable speed drives. This paper discusses the implementation of a DSP controller for controlling a permanent magnet synchronous motor (PMSM). It discusses the theory of operation of a PMSM drive and shows how a DSP controller has been designed to perform the vector and current control functions. The design c... View full abstract»

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