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Electrical and Computer Engineering, Canadian Journal of

Issue 3-4 • Date N/A 1988

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Displaying Results 1 - 12 of 12
  • Canadian Journal of Electrical and Computer Engineering - Front cover

    Page(s): c1
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    Freely Available from IEEE
  • Inside front cover

    Page(s): c2
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    Freely Available from IEEE
  • Table of contents

    Page(s): 89
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    Freely Available from IEEE
  • Digital-filter structures based on the concept of the voltage-conversion generalized-immittance converter

    Page(s): 90 - 98
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    By using the concept of the voltage-conversion generalized-immittance converter, a general biquadratic digital-filter structure is obtained which can realize all the standard, second-order, digital-filter sections. Then, through the application of the principle of transposition, a multiple-output structure is obtained which can realize either individually or simultaneously, all the standard second-order digital-filter sections. The proposed structures, can be stabilized with respect to limit-cycle oscillations. Further, the structures obtained by transposition have the unique property of allowing a choice between the elimination of limit cycles and the reduction of roundoff noise. The authors conclude with a comparison of the proposed structures relative to the direct canonic and section-optimal structures with respect to output roundoff noise and sensitivity. View full abstract»

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  • Generation of elliptical beams of an arbitrary beam ellipticity and low cross-polarization using offset dual parabolic cylindrical reflectors

    Page(s): 99 - 105
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    It is shown that dual parabolic cylindrical reflectors can be designed to yield elliptical beam shapes with an arbitrary beam ellipticity, defined as the ratio of beam widths in the principal planes. The only limitation affecting the beam ellipticity is the practical geometry of the antenna in a particular use, where certain feed or sub-reflector dimensions may not be desirable. To confirm computations, an experimental unit was designed to yield a beam ellipticity of about 12, and was fed by a dielectric rod feed to reduce the aperture blockage. The measured patterns closely match the computations. An offset configuration which may be used to eliminate feed blockage is also investigated. Its performance is also verified by an offset experimental unit. View full abstract»

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  • An investigation of block-adaptive decision feedback equalization for frequency selective fading channels

    Page(s): 106 - 111
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    Block adaptation techniques are investigated by computer simulation for decision feedback equalization on a rapidly fading dispersive channel. Trade-offs between training sequence length and block length are found. Block adaptation supplemented by linear interpolation of coefficients is found to be an attractive alternative to more complex continuously-adapting recursive least squares adaption algorithms. View full abstract»

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  • Effects of hydro models on optimal operation of variable head hydro-thermal systems

    Page(s): 112 - 119
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    The problem of optimum short-range scheduling of an integrated-hydro-thermal electric power system with variable head hydro plants is considered. The scheduling problem involves the solution of the coordination for an arbitrary hydro plant performance model. Of the many models available, the Glimn-Kirchmayer model and the Hamilton-Lamont model are selected for use in deriving optimality conditions for the problem. The Newton-Raphson method is the basis of an algorithm developed solving the problem of optimal power scheduling iteratively. The authors report on the effect of the form of the hydro plant model on the resulting optimal scheduling. Several test systems are used to examine model effects in terms of optimal fuel cost, thermal and hydro generation and transmission losses. Effects of the models on the convergence properties of the algorithm and a comparison of execution times are also reported. View full abstract»

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  • Power system stabilizer application in a multi-machine generating plant

    Page(s): 120 - 126
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    The authors describe how eigenvalue and eigenvector methods can be used to determine the effects of placing power system stabilizers on different machines in a multi-machine generating plant. The plant in question has six generating units, the sizes and electrical characteristics of which differ significantly from each other. This mixture of units gives rise to a number of distinct oscillatory modes in the plant which can be effectively damped using delta-omega-based power system stabilizers acting on specifically selected units in the plant. The basic principles of the methods used and the results of simulation studies illustrating the various effects are presented. View full abstract»

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  • Long-range forecasting for utilities with dynamic load growth rates

    Page(s): 127 - 131
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    Electric utilities in developing countries face special challenges in projecting output to meet tremendous increases in peak demand and total energy consumption. due to the huge industrial and residential load growth resulting from economic expansion. This paper presents a comprehensive methodology for long-range forecasting of peak demand and energy consumption for such utilities. The methodology is implemented for the Eastern Region Utility in the Kingdom of Saudi Arabia which is characterized by a dynamic industrial-residential load growth pattern. View full abstract»

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  • The university of Western Ontario faculty of engineering science

    Page(s): 132
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    The University of Western Ontario, Department of Electrical Engineering, invites applications for tenure-track or limited term positions at the assistant/associate professor level. View full abstract»

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  • [Back inside cover]

    Page(s): c3
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    Freely Available from IEEE
  • Back cover

    Page(s): c4
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Aims & Scope

The role of the Canadian Journal of Electrical and Computer Engineering is to provide scientific and professional activity for its members in Canada, the CJECE complements international journals and will be of particular interest to anyone involved in research and development activities in the field of electrical and computer engineering.

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Meet Our Editors

Editor-in-Chief
Dr. Shahram Yousefi
Dept. of Electrical and Computer
     Engineering
Queen's University