By Topic

IEEE WESCANEX 97 Communications, Power and Computing. Conference Proceedings

22-23 May 1997

Filter Results

Displaying Results 1 - 25 of 64
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • List of authors

    Publication Year: 1997, Page(s):350 - 351
    Request permission for commercial reuse | PDF file iconPDF (62 KB)
    Freely Available from IEEE
  • Localized electrochemical plating of interconnectors for microelectronics

    Publication Year: 1997, Page(s):327 - 332
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (948 KB)

    This work demonstrates the electrodeposition of micrometer scale copper structures including columns and interconnectors. Copper interconnectors of 25 μm width were grown within an integrated circuit package using a simple instrument based on the scanning electrochemical microscope. In the present instrument electrodeposition is localized by applying a voltage between a closely spaced glass ins... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A technology management methodology implemented using expert systems

    Publication Year: 1997, Page(s):70 - 75
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Management of technology concerns the processes of managing technology development through research and development, and managing the introduction and use of technology. Expert systems are computer programs that encode knowledge about a problem into a knowledge base, and then use this knowledge to reason and draw conclusions about a particular problem or situation. Currently, expert systems are be... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A review of proposed MAC protocols for high-speed wireless networks

    Publication Year: 1997, Page(s):302 - 305
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    Following an introduction and brief overview of media access control protocols, this paper presents a review of the current literature on MAC protocols and bandwidth allocation strategies for high speed wireless systems. The four protocols reviewed in this paper range from simple Aloha-type algorithms to relatively complex polling schemes. An attempt is also made to compare the protocols based on ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experiments with wavelet and other edge detection techniques

    Publication Year: 1997, Page(s):322 - 326
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    This paper discusses experimental work with a wavelet edge detection technique for still images. A brief overview of wavelets and other methods for edge detection is given along with images comparing the results. Several different image classes are examined and processed. Two test images are discussed in order to determine the properties of the system. An experimental image is used to obtain insig... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulation of CT's operating in parallel into a differential current protection scheme

    Publication Year: 1997, Page(s):126 - 131
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    When the secondaries of current transformers (CTs) are connected in parallel to a spill circuit with nonzero impedance, then the CT simulations are coupled by the common voltage across this spill circuit. This paper considers the case of two CTs feeding a high impedance spill circuit and gives a comparison of simulation and test results View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Real time power system security and control

    Publication Year: 1997, Page(s):64 - 69
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    In this paper, a “real time power system security and control system” which combines energy margin evaluations with simulations on the University of British Columbia's real-time power system simulator, as well as with fuzzy logic techniques for the decision making process is presented. The energy-based algorithm is called the “Expanded Two-Machine equivalent System”. The en... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fuzzy clocks in monitoring settling times of control systems

    Publication Year: 1997, Page(s):296 - 301
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The main finding of the study is the utility of adaptive fuzzy clocks in monitoring the settling times of control systems. We study the measurement of how long it takes control system responses to reach and stay within a specified tolerance band of its final value. The proposed approach to monitoring control system settling time is not limited to fuzzy controllers, but extends to other classes of ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A benchmark for artificial intelligence applications on parallel computers-BEAP

    Publication Year: 1997, Page(s):82 - 87
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Production or rule based systems hold an important place within the field of artificial intelligence (AI). In present times production systems are facing a bottleneck regarding speeding up of their processing. The use of parallel computers has been advocated as one of the most appropriate technologies for this speedup. In this direction, attempts have been made and more will follow. These attempts... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Internet telephony compression algorithms

    Publication Year: 1997, Page(s):13 - 18
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    Internet telephony is the technology that allows for the transmission of digitized voice signals over the lnternet. The Internet telephony market has exploded since March of 1995 and continues to grow with the distribution of Internet telephone applications via the two leading Web browsers; Netscape Navigator and Internet Explorer. The technology needs to be studied in order to determine the effec... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of phase and amplitude comparators for transmission line protection

    Publication Year: 1997, Page(s):179 - 184
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper describes the design of poly-phase power system relays by using the amplitude and phase comparison techniques. Both techniques are used for designing phase-to-phase, three-phase and phase-to-ground relays. A new poly-phase amplitude method, which uses inputs from the phase comparator, is proposed for protecting power transmission lines during phase-to-phase and three-phase faults. A uni... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Image compression through fractal surface interpolation and wavelet compression

    Publication Year: 1997, Page(s):94 - 99
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    The paper presents a perceptual image representation technique based on fractal surface interpolation (FSI), This technique is motivated from the observation that images taken from the real world contain many textures that are self similar, or fractal, in nature. The fractal surface interpolation representation is then compressed using a zero tree wavelet compression subsystem with lossless entrop... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Variance fractal dimension analysis of seismic refraction signals

    Publication Year: 1997, Page(s):163 - 167
    Cited by:  Papers (2)  |  Patents (16)
    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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.