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IEEE Transactions on Systems, Man, and Cybernetics

Issue 1 • Date Jan/Feb 1988

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Displaying Results 1 - 19 of 19
  • Moment-preserving curve detection

    Publication Year: 1988, Page(s):148 - 158
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    A novel method for curve detection based on the moment-preserving principle is proposed. The method can be used to estimate curve locations and widths to subpixel accuracy. For each 4.5-unit circle in an input image that includes a curve segment, the approach derives a parabolic equation as well as a width value to describe the curve segment. Experimental results are included to show the effective... View full abstract»

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  • Aiding the operator during novel fault diagnosis

    Publication Year: 1988, Page(s):142 - 148
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    The design and philosophy are presented for an intelligent aid for a human operator who must diagnose a novel fault in a physical system. A novel failure is defined as one that the operator has not experienced in either real system operation or training. Because the fault is novel, the human must reason using causal knowledge. The aid contains unique features that support such reasoning. One of th... View full abstract»

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  • Organizing customized robot dynamics algorithms for efficient numerical evaluation

    Publication Year: 1988, Page(s):115 - 125
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    In 1983, the computer program called algebraic robot modeler (ARM) was implemented to generate symbolically complete closed-form and recursive dynamic robot models. To enhance computational efficiency for dynamic simulation and real-time control, the systematic organization of these symbolic models was introduced in 1985 to remove repetitive calculations within and across equations and thereby gen... View full abstract»

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  • Modeling of task-dependent characteristics of human operator dynamics pursuit manual tracking

    Publication Year: 1988, Page(s):163 - 172
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    To model human operator (HO) dynamics in manual tracking tasks, an ensemble of models, each for a certain class of inputs, seems to be needed. By placing in a linear framework the modeling studies so far conducted, it is evident that different hypotheses have been proposed to explain the observed input dependence of the estimated HO (linear) models. Here, the authors examine these hypotheses and p... View full abstract»

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  • Sources of and effects of interexpert correlation: an empirical study

    Publication Year: 1988, Page(s):135 - 142
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Expert estimates are relied on as sources of data whenever experimental data are lacking, such as in risk analysis. Correlation between experts poses problems in the aggregation of multiple estimates. The sources and structure of interexpert correlation are identified, and some of the ramifications are discussed. Expert estimates were found to correlate to the experts' problem-solving techniques a... View full abstract»

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  • A new method of dynamics for robot manipulators

    Publication Year: 1988, Page(s):105 - 114
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    A novel method of determining the dynamics for robot manipulators has been developed from Lagrangian mechanics. This method can solve the problem in which the number of computations is numerous when the Lagrange-Euler method is used for deriving a set of closed and explicit-form differential or state equations for robot manipulators. The method can be applied to the design of control systems, the ... View full abstract»

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  • On the stability, storage capacity, and design of nonlinear continuous neural networks

    Publication Year: 1988, Page(s):80 - 87
    Cited by:  Papers (46)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    The stability, capacity, and design of a nonlinear continuous neural network are analyzed. Sufficient conditions for existence and asymptotic stability of the network's equilibria are reduced to a set of piecewise-linear inequality relations that can be solved by a feedforward binary network, or by methods such as Fourier elimination. The stability and capacity of the network is characterized by t... View full abstract»

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  • An adaptive computational model for texture segmentation

    Publication Year: 1988, Page(s):9 - 17
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    Extensions to current models for texture segmentation are presented, in which the underlying detector (filter) mechanisms are allowed to adapt to the incoming signal in terms of their dynamical response range and associativities. This system converges on new texton (B. Julesz, 1981) profiles of minimal dimensionality that are used to classify texture regions by a minimum distance classifier in the... View full abstract»

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  • On ordered weighted averaging aggregation operators in multicriteria decisionmaking

    Publication Year: 1988, Page(s):183 - 190
    Cited by:  Papers (2385)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    The author is primarily concerned with the problem of aggregating multicriteria to form an overall decision function. He introduces a type of operator for aggregation called an ordered weighted aggregation (OWA) operator and investigates the properties of this operator. The OWA's performance is found to be between those obtained using the AND operator, which requires all criteria to be satisfied, ... View full abstract»

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  • Bidirectional associative memories

    Publication Year: 1988, Page(s):49 - 60
    Cited by:  Papers (1036)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1068 KB)

    Stability and encoding properties of two-layer nonlinear feedback neural networks are examined. Bidirectionality is introduced in neural nets to produce two-way associative search for stored associations. The bidirectional associative memory (BAM) is the minimal two-layer nonlinear feedback network. The author proves that every n-by- p matrix M is a bidirectionally stabl... View full abstract»

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  • Convolution operators as a basis for objective correlates of texture perception

    Publication Year: 1988, Page(s):158 - 163
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    A method is described for deriving, from digitized images, objective measures that correlate strongly with simple perceptual judgements on the same images. Each measure is the normalized variance of an image obtained by convolving the original image with a specific local operator. This operator is designed to optimize the correlation between the particular percept and the objective measure, subjec... View full abstract»

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  • Realization of robot motion based on a learning method

    Publication Year: 1988, Page(s):126 - 134
    Cited by:  Papers (169)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    To make a robot track a given desired motion trajectory, a learning control scheme is proposed which is based on the repeatability of robot motion. In this scheme the robot obtains a desired motion by repeating trials (test motion). A merit of this control scheme is that the input torque pattern that generates the desired motion can be formed without estimating the physical parameters of robot dyn... View full abstract»

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  • The synthesis of smooth trajectories for pick-and-place operations

    Publication Year: 1988, Page(s):173 - 178
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    A spline-based method of programming smooth trajectories for pick-and-place operations is introduced. Unlike continuous-path operations, which impose a unique Cartesian trajectory, an infinite number of smooth trajectories can be described between any given pick and its corresponding place configuration. The method begins with the mapping of the pick and the place configuration in Cartesian space ... View full abstract»

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  • Combined observer-controller synthesis for uncertain dynamical systems with applications

    Publication Year: 1988, Page(s):88 - 104
    Cited by:  Papers (79)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    Control of a class of nonlinear/uncertain systems is discussed using a variable-structure systems approach. Observations of the states of such systems is also considered. The natural extension to an observer-controller design is illustrated using a computer simulation example of a θ-r manipulator. Next, the problem of path planning is addressed using a combined observer-controller s... View full abstract»

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  • The role of process abstraction in simulation

    Publication Year: 1988, Page(s):18 - 39
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2004 KB)

    The concept of process abstraction, which allows simulationists to construct models composed of a set of interconnected levels, is discussed. Each level in the network represents the process at some given level of abstraction and is encoded using a model type (e.g. Petri net, automaton, data flow graph) appropriate to that level. An example process composed of articulated figures around a circular... View full abstract»

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  • Automatic graph drawing and readability of diagrams

    Publication Year: 1988, Page(s):61 - 79
    Cited by:  Papers (124)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1484 KB)

    The state of the art in automatic graph drawing is reviewed, with special attention to the readability of information system diagrams. Existing results in the literature are compared, and a comprehensive algorithmic approach to the problem is proposed. The algorithm presented draws graphs on a grid and is suitable for both undirected graphs and mixed graphs that contain as subgraphs hierarchic str... View full abstract»

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  • A proposed method for representing hierarchies

    Publication Year: 1988, Page(s):2 - 8
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    A novel diagram (referred to as a ring diagram) helpful in displaying several types of hierarchies is defined. The merits of the diagram are examined and examples of mapping hierarchies taken from the existing literature are provided View full abstract»

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  • Fuzzy Petri nets for rule-based decisionmaking

    Publication Year: 1988, Page(s):178 - 183
    Cited by:  Papers (205)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    The technique of fuzzy reasoning by transformations of fuzzy truth state vectors by fuzzy matrices is extended to Petri nets. The result is a novel type of neural network in which the transition bars serve as the neutrons, and the nodes are conditions. Conditions may be conjuncted and disjuncted in a natural way to allow the firing of the neurons. The neuron fires to feed the implication truths in... View full abstract»

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  • Pseudolinks and the self-tuning control of a nonrigid link mechanism

    Publication Year: 1988, Page(s):40 - 48
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1028 KB)

    The pseudolink concept for representing the tip position of a nonrigid link is developed. The pseudolink is defined as the line segment connecting the proximal and distal ends of the links. Pseudolink length and angle are determined online using joint encoder information together with strain measurements taken along the link. External sensors are not required and trajectory planning can be carried... View full abstract»

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