IEEE WESCANEX 97 Communications, Power and Computing. Conference Proceedings

22-23 May 1997

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  • IEEE WESCANEX 97 Communications, Power and Computing. Conference Proceedings

    Publication Year: 1997
    Request permission for commercial reuse | PDF file iconPDF (684 KB)
    Freely Available from IEEE
  • Web applets for interactive tutorials on artificial neural learning

    Publication Year: 1997, Page(s):19 - 23
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    The paper describes the development of Java/sup TM/ Web applets for tutorials on artificial neural learning. First, the artificial neuron applet simulates the structure and behaviour of an artificial neuron. Second, the perceptron learning applet demonstrates a simple form of supervised learning known as the perceptron learning algorithm. These applets exploit the benefits of Java to provide a dyn... View full abstract»

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  • Composite generation and transmission system adequacy assessment with time varying loads using a contingency enumeration approach

    Publication Year: 1997, Page(s):41 - 46
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (607 KB)

    Adequacy evaluation of composite generation and transmission system can be performed in a variety of ways. In general, these techniques can be categorized as being either a Monte Carlo simulation approach or based on a contingency selection/evaluation procedure. This paper illustrates the development of an annual chronological load curve for each load bus in a composite generation and transmission... View full abstract»

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  • List of authors

    Publication Year: 1997, Page(s):350 - 351
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    Freely Available from IEEE
  • Hardware implementation of neural network controlled optimal PWM inverter using TMS320C30 board

    Publication Year: 1997, Page(s):168 - 173
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    An optimal PWM scheme is used to control a voltage source inverter. The switching angles are controlled by a feedforward artificial neural network in a way that all nontriplen harmonics up to the 29th are completely removed from the output and the amplitude of the fundamental is set at the desired level. The neural network is emulated by a TMS320C30 DSP board along with the other parts ... View full abstract»

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  • A hybrid deterministic/probabilistic technique for HVDC system reliability evaluation

    Publication Year: 1997, Page(s):35 - 40
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    This paper extends the conventional probabilistic approaches for reliability evaluation of high voltage direct current (HVDC) transmission systems by including acceptable deterministic criteria in the stochastic evaluation of the reliability indices. The operation of the HVDC transmission system is categorized into three operating states designated as healthy, marginal and at risk. The well-being ... View full abstract»

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  • Modeling and simulation of a hybrid-engine

    Publication Year: 1997, Page(s):286 - 291
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A fundamental mathematical model is required to describe the dynamic motion of the hybrid-engine. Based on the mathematical model, simulation programs have been developed These programs are used to predict the operation of the motor/generator and to develop a control strategy. The simulation results are included. Two structures for the hybrid-engine have been considered. One uses a single cylinder... View full abstract»

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  • Variance fractal dimension analysis of seismic refraction signals

    Publication Year: 1997, Page(s):163 - 167
    Cited by:  Papers (2)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The transition features on the variance fractal dimension trajectory are investigated using a noise separation technique for distinguishing various seismic refraction signals from noise. The seismic refraction signals are characterized by short-period vibration waves and include primary body (P) waves, both refracted and reflected from subsurface interfaces, as well as random noise and coherent no... View full abstract»

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  • Annotated reference list agents

    Publication Year: 1997, Page(s):7 - 12
    Cited by:  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The agents described in the article were used to create a system which does most of the creation, addition, and maintenance of an annotated reference list page. This system has been used to maintain a telecommunications Web page for the last two years. The strength of this system is that it automatically locates a large number of potential links which may be included in the Web page, and uses a fa... View full abstract»

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  • H.263 based facial image compression for low bitrate communications

    Publication Year: 1997, Page(s):30 - 34
    Cited by:  Papers (3)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The International Telecommunication Union (ITU-T) has put forward a recommendation H.263 “Video Coding for Low Bitrate Communication”. This recommendation specifies a coded representation that can be used for compressing the moving picture component of audiovisual services at low bitrates. The basic configuration of the video source coding algorithm is based on ITU-T recommendation H.2... View full abstract»

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  • Phase measurements using direct conversion AM radio navigation

    Publication Year: 1997, Page(s):280 - 285
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    This paper presents a number of approaches for precision navigation using AM broadcasts and analog phase measurement techniques. By mixing signals down to a low intermediate frequency (IF) and locking on with a phase lock loop (PLL), phase differences can be measured with ±0.5° accuracy. This provides ±0.32 meters range accuracy with a 1300 kHz AM radio signal View full abstract»

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  • Array near field focusing

    Publication Year: 1997, Page(s):242 - 245
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Antenna arrays are normally characterized in terms of their far field radiation patterns, beam width and directive gain. However, for some applications the array is focused in the near field. The focus size is determined in terms of the near field properties of the array. The focusing is done through adjusting the phase of the elements of the array. The simulations are done using the method of mom... View full abstract»

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  • Moment invariants for image analysis with applications to image reconstruction

    Publication Year: 1997, Page(s):157 - 162
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    We address a detailed analysis of the accuracy of Zernike moment computing in terms of its discretization error. This is explained by relating the accuracy issue to the analytic number theory problem, the lattice points of a circle. The image reconstruction power of Zernike moments is also discussed View full abstract»

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  • Neural network-based ATM QoS estimation

    Publication Year: 1997, Page(s):1 - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    A key technology for the B-ISDN is asynchronous transfer mode (ATM). ATM traffic management or congestion control is needed to guarantee the quality of service (QoS) parameters. A neural network-based QoS estimation is presented to enhance the performance in ATM management so that the service-providers can offer better services to their users. Several methods such as learning vector quantization (... View full abstract»

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  • Very low bit rate video coding for visual communications

    Publication Year: 1997, Page(s):24 - 29
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    This paper reviews the developments in very low bit rate coding of video for visual communication, with emphasis on the transmission of facial images. In this context, model-based coding (MBC) has received considerable attention, and has shown to be a promising approach for coding of video below 64 kb/s. A survey of emerging approaches with respect to different object models, ranging from regional... View full abstract»

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  • A progressive numerical method for depressing the internal resonances of scattering problems

    Publication Year: 1997, Page(s):258 - 262
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    The method of moments (MoM) produces spurious results while calculating electromagnetic scattering at the internal resonance frequencies on infinite conducting cylinders. A progressive numerical method provides an efficient way to deal with this situation. It solves the integral equations progressively for many selected sub-regions of the surface instead of the whole object. A concept of overlappi... View full abstract»

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  • ATM data classification with an artificial neural network

    Publication Year: 1997, Page(s):276 - 279
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    The ability to classify different data types in real time has many potential applications. Implemented in a switching element, data recognized to be time sensitive, such as voice, could be given higher priority or other special handling. Using competitive learning, it is possible to train a network to distinguish between audio, video and FTP data without an external supervisor. Unprocessed audio, ... View full abstract»

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  • Multifractal characterization of Laplacian fractals

    Publication Year: 1997, Page(s):114 - 120
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    This paper presents a multifractal approach to characterizing, or fingerprinting, the structural complexity of similar-looking, yet different, discharge trees caused by dielectric breakdown. Multifractal characterization of Laplacian fractals involves the computation of a spectrum of fractal dimensions, providing much more information than is possible from just a single fractal dimension. This all... View full abstract»

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  • Multifractal wavelet compression of fingerprints

    Publication Year: 1997, Page(s):313 - 321
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1400 KB)

    This paper presents compression of grey-scale fingerprint images, using a wavelet transform guided by a multifractal measure to obtain the best reconstructed image in terms of a higher peak signal to noise ratio, PSNR, at the lowest bit rate. The fingerprint images and the corresponding wavelet coefficients are considered to be approximation of strange attractors and can be analyzed by their multi... View full abstract»

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  • A Ka band phased array using circularly polarized cavity elements

    Publication Year: 1997, Page(s):238 - 241
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    A hexagonal array was produced for space applications. It consists of seven cavities driven by cross shaped dielectric resonators. These elements are circularly polarized and have a high gain (≈12 dB) View full abstract»

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  • Practical considerations in applying economical dispatch models to combined cycle cogeneration plants

    Publication Year: 1997, Page(s):59 - 63
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    An economical dispatch model has been expanded to include combined cycle cogeneration plants, which comprise steam turbine generators. The extended model was simplified into a spread sheet exercise. Both models are examined against practical considerations in running combined cycle cogeneration plants View full abstract»

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  • A classical approach in modelling the air-core transformer

    Publication Year: 1997, Page(s):344 - 349
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    In this paper, a specially designed air-core power transformer, to be employed in a small power tapping scheme from HVDC transmission systems, is studied. First, the transformer is analyzed by classical electromagnetic theory. Next, a small prototype transformer is built and studied in the laboratory. Experimental results, confirm the validity and accuracy of the proposed method for calculating th... View full abstract»

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  • Hardware-software co-simulation of a parallel computer system

    Publication Year: 1997, Page(s):214 - 217
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    In this paper the hardware/software co-simulation results (Gajski et al., 1992) of a four node single-bus based multicomputer architecture are presented. The application used to illustrate the co-simulation is a parallel matrix multiplication algorithm. The objective is to illustrate the trade-offs and improvements in design that can be made within a co-simulation environment View full abstract»

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  • Fonetix-speech articulation and hearing perception software

    Publication Year: 1997, Page(s):153 - 156
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    For human speech perception, audio-visual interaction is prominent. Fonetix is a multimedia software kit for the Web being developed for improving speech and hearing perception. The initial phase involved the development or modification of existing systems to accommodate interactive repositories of audio and video. This included the display of animated midsagittal views of the vocal tract in real-... View full abstract»

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  • Modifying the software development life cycle to include software performance assurance

    Publication Year: 1997, Page(s):100 - 104
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    When performance assurance is not included in the software development process, the poor performance of resulting applications will create strong interest in the subject and motivation to change the process to address the problem. In spite of this strong interest however, such a change in the process can be more difficult than expected. Based on our experience in adding performance assurance to a ... View full abstract»

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