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IEEE Transactions on Systems, Man, and Cybernetics

Issue 5 • Sept.-Oct. 1985

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Displaying Results 1 - 15 of 15
  • Risk assessment to support management of a hazardous spill cleanup

    Publication Year: 1985, Page(s):601 - 607
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1451 KB)

    A modeling effort was conducted to support management of the cleanup of a hazardous material spill resulting from a rail accident. The model considered transport of the hazardous material through the groundwater system and the human health effects of ingesting contaminated groundwater. The model was implemented as a computer program. Subjective probabilities were assessed to account for uncertaint... View full abstract»

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  • Information theoretic covariance complexity and its relation to pattern recognition

    Publication Year: 1985, Page(s):608 - 619
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1847 KB)

    The discrimination information of a set of stochastic vectors is utilized to define a measure of the information theoretic complexity of the associated covariance matrix. Bounds are developed that relate the covariance complexity to the maximum distance, or speed, between the characteristic roots of the covariance. A computationally efficient algorithm is devised for finding the elements of a diag... View full abstract»

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  • Optimal allocation of system development resources to reduce and/or tolerate human error

    Publication Year: 1985, Page(s):620 - 630
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2091 KB)

    A need exists to reduce the frequencies of consequential errors and/or develop systems that are error-tolerant in the sense that the undesirable consequences of errors do not propagate. Reduction and/or tolerance can be accomplished with a variety of mechanisms, including selection, training, equipment design, job design, and aiding. Since no single mechanism is sufficient, a mix of mechanisms is ... View full abstract»

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  • Point pattern matching using convex hull edges

    Publication Year: 1985, Page(s):631 - 637
    Cited by:  Papers (35)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4321 KB)

    Algorithms for matching two sets of points in a plane are given. These algorithms search in the parameter space and find the transformation parameters that can match the most points in two sets. Since an exhaustive search for the best parameters is not affordable as the number of points in the sets become large, a subset selection method is given in order to reduce the search domain. Subsets are c... View full abstract»

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  • An application of the c-varieties clustering algorithms to polygonal curve fitting

    Publication Year: 1985, Page(s):637 - 641
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2051 KB)

    An algorithm is described that fits boundary data of planar shapes in either rectangular coordinate or chain-code format with a set of straight line segments. The algorithm combines a new vertex detection method, which locates initial vertices and segments in the data, with the c-elliptotype clustering algorithm, which iteratively adjusts the location of these initial segments, thereby obta... View full abstract»

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  • Entropy and correlation

    Publication Year: 1985, Page(s):641 - 642
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (439 KB)

    A simple an intuitively interpretable correlation coefficient between two discrete random variables is defined. Its metric property is then proved. View full abstract»

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  • Extraction of shape features for syntactic recognition of mechanical parts

    Publication Year: 1985, Page(s):642 - 651
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1803 KB)

    A language for describing the shape of those mechanical parts modeled by the rotational or translational sweeping (based on boundary representation) is presented. Each boundary is represented by a contour composed of primitives from the specified set. A work (in the mentioned language) is the description of a given contour and constitutes an input to the detector (transducer). Its output is a comp... View full abstract»

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  • On threshold selection using clustering criteria

    Publication Year: 1985, Page(s):652 - 655
    Cited by:  Papers (56)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5402 KB)

    The threshold selection method of N. Otsu (ibid., vol.SMC-9, p.62-6, 1979) is shown to break down for a certain range of object-to-background pixel population ratios. Modifications to Otsu's method are proposed to overcome some of its limitations. The findings are also relevant to the closely related methods of T. Ridler (1978) and H.J. Trussell (1979). View full abstract»

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  • Visual undersampling in raster sampled images

    Publication Year: 1985, Page(s):655 - 659
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3359 KB)

    When a periodic signal is sampled at a rate below the Nyquist limit, it is considered undersampled because it is impossible to recover the original signal from the samples without some additional signal information. The authors have studied the visual effects of raster sampling upon the discriminability of simple monochrome test targets (edges and sinusoidal gratings) and found out that observers ... View full abstract»

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  • An electronic circuit model of nerve axon for signal transmission

    Publication Year: 1985, Page(s):660 - 662
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1362 KB)

    An electronic circuit model of signal propagation in the nerve axon that is based on the neuristor proposed by H.D. Crane (1960) is described. This circuit is a cascade of identical active network segments suitable for integration. The active line has characteristics such as threshold, a refractory period, saltatory propagation, and bidirectional propagation. These properties are similar to those ... View full abstract»

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  • An evolutionary theoretical model of firms in an industry: The replicon model

    Publication Year: 1985, Page(s):662 - 665
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (826 KB)

    The replicon model, which was introduced to describe the evolution of gene distribution in biological populations, is adapted to represent the stochastic evolution of the size of a firm in a model industry. The replicon model is shown to clarify the underlying mechanism of technological evolution in industry using computer simulation. View full abstract»

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  • Modularization guidelines in the development of large-scale system models for simulation

    Publication Year: 1985, Page(s):665 - 669
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1243 KB)

    The advantages of using a modular approach for the model development of large-scale dynamic systems are discussed. Four modularization criteria are presented. When these criteria are combined in the definition of the borders of the system's modules, the result will be a set of well-designed, easily maintainable modules with a low level of coupling between them. Even though these ideas originated d... View full abstract»

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  • On model reference adaptive control and identification-modified algorithms to ease implementation

    Publication Year: 1985, Page(s):669 - 675
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1151 KB)

    An adaptive control method is presented for linear deterministic time-invariant systems which adjusts estimated plant parameters, instantaneously providing control and identification. The primary contribution is that a priori data regarding plant poles (zeros) or plant parameters can be easily utilized to minimize the hardware design. Also, alternative modified parameter update algorithms are pres... View full abstract»

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  • The optimum green split of a cycle time

    Publication Year: 1985, Page(s):675 - 681
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1092 KB)

    The optimum split of a cycle time for a controlled traffic intersection within an urban network is determined for four objective functions. These are total delay, total number of stops, fuel consumption, and carbon monoxide minimization. It is shown that for each objective function, an optimum value of green split that minimizes the function exists. An expression for the optimum green is derived i... View full abstract»

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  • Contributors

    Publication Year: 1985, Page(s): 682
    Request permission for commercial reuse | PDF file iconPDF (506 KB)
    Freely Available from IEEE