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IEEE Transactions on Systems, Man, and Cybernetics

Issue 3 • May 1987

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Displaying Results 1 - 25 of 27
  • [Table of contents]

    Publication Year: 1987, Page(s): c1
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    Freely Available from IEEE
  • IEEE Systems, Man, and Cybernetics Society

    Publication Year: 1987, Page(s): c2
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  • Strategies for Diagnosis

    Publication Year: 1987, Page(s):333 - 339
    Cited by:  Papers (106)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2503 KB)

    Diagnosis is among the dominant applications of expert systems technology today. In the past, most diagnostic systems were built using some form of rule-based production system. Recently, however, many new strategies have emerged to support much more complex reasoning for diagnosis. A survey of the architectures for the complex strategies now available for diagnosis is presented. View full abstract»

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  • Expert Systems and Diagnostic Expertise in the Mechanical and Electrical Domains

    Publication Year: 1987, Page(s):340 - 349
    Cited by:  Papers (81)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3223 KB)

    Current expert system technology tends to rely on the use of shallow empirically based experiential knowledge. With only this type of knowledge available, expert systems have been capable of reaching a high level of agreement with human experts in a limited area of expertise. However, due to the nature of their knowledge, such systems fall short of human expertise in many ways. The human diagnosti... View full abstract»

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  • Interpreting Observations of Physical Systems

    Publication Year: 1987, Page(s):350 - 359
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2949 KB)

    An unsolved problem in creating diagnostic expert systems is generating a qualitative understanding of how the system is behaving from raw data, especially numerical data taken across time. Yet automating this critical step is necessary for building the next generation of expert systems. The theory described provides a means of interpreting observations made of a physical system across time in ter... View full abstract»

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  • Diagnosis and Sensor Validation through Knowledge of Structure and Function

    Publication Year: 1987, Page(s):360 - 368
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3441 KB)

    A broadly applicable algorithm can guide diagnostic reasoning using knowledge of structure and function. It is shown that, for a useful class of domains, a faulty sensor is no harder to diagnose than other system objects (and may even be easier), thereby offering a solution for at least a subset of "the sensor validation problem." A prototype called LES has been constructed which may be the first ... View full abstract»

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  • Diagnosis Using the Formal Theory of a Signal-Processing System

    Publication Year: 1987, Page(s):369 - 379
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3422 KB)

    Many signal-processing systems can be viewed as transforming their input signals into a representation of the real-world scenario from which the signals originated. Such systems usually have parameters whose settings are selected on the basis of the class of expected input scenarios. Finding the appropriate parameter settings for a class of input scenarios usually involves testing the system again... View full abstract»

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  • Failure-Driven Learning of Fault Diagnosis Heuristics

    Publication Year: 1987, Page(s):380 - 394
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4066 KB)

    An application of failure-driven learning to the construction of the knowledge base of a diagnostic expert system is discussed. Diagnosis heuristics (i.e., efficient rules which encode empirical associations between atypical device behavior and device failures) are learned from information implicit in device models. This approach is desirable since less effort is required to obtain information abo... View full abstract»

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  • A Probabilistic Causal Model for Diagnostic Problem Solving Part II: Diagnostic Strategy

    Publication Year: 1987, Page(s):395 - 406
    Cited by:  Papers (76)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2787 KB)

    An important issue in diagnostic problem solving is how to generate and rank plausible hypotheses for a given set of manifestations. Since the space of possible hypotheses can be astronomically large if multiple disorders can be present simultaneously, some means is required to focus an expert system's attention on those hypotheses most likely to be valid. A domain-independent algorithm is present... View full abstract»

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  • Modeling and Diagnosing Problem-Solving System Behavior

    Publication Year: 1987, Page(s):407 - 419
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3847 KB)

    A new component of a problem-solving system, called the diagnosis module (DM), that enables the system to reason about its own behavior is described. The aim of the diagnosis is to identify inappropriate control parameter settings or faulty hardware components as the causes of observed misbehavior. The problem-solving system being diagnosed is a distributed interpretation system, the distributed v... View full abstract»

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  • Using Experience in Clinical Problem Solving: Introduction and Framework

    Publication Year: 1987, Page(s):420 - 431
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3959 KB)

    While much recent interest exists in the cognitive processes involved in clinical reasoning, a much-neglected area is the role of experience in diagnosis and treatment. A model of experience's role in commonsense problem solving is developed and a model of clinical reasoning that incorporates experience is proposed. Understanding the role of experience in clinical reasoning has two important impli... View full abstract»

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  • Qualitative Simulation as Causal Explanation

    Publication Year: 1987, Page(s):432 - 444
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3415 KB)

    To give a causal explanation of an event is to show how that event could be deduced from a set of universal laws and a set of initial conditions. How can this philosophical definition be related to the diagnostic causal explanations of a practicing expert? An expert physician gives a causal explanation of a disease state by referring to knowledge of the structure of the physiological mechanisms in... View full abstract»

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  • A Mechanism for Forming Composite Explanatory Hypotheses

    Publication Year: 1987, Page(s):445 - 454
    Cited by:  Papers (84)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3498 KB)

    A general problem-solving mechanism is described that is especially suited for performing a particular form of abductive inference, or best explanation finding. A problem solver embodying this mechanism synthesizes composite hypotheses by combining simple hypotheses to satisfy explanatory goals. These simple hypotheses are formed by instantiating prestored explanatory "concepts." In this way the p... View full abstract»

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  • Self-Paced Path Control as an Optimization Task

    Publication Year: 1987, Page(s):455 - 464
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3693 KB)

    An optimization model of human motor control in a laterally constrained self-paced path control task (e. g., driving) is proposed. The model structures the task as intermittent control with Begg's relationship used to describe the growth of lateral error with distance traveled during the sampling interval. Rewards and penalties are explicitly present in the objective function to be optimized. The ... View full abstract»

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  • A Decision Support System to Evaluate Maintenance Requirements of Recoverable Item Populations

    Publication Year: 1987, Page(s):465 - 473
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2956 KB)

    A microcomputer-based decision support system that determines and evaluates maintenance requirements of repairable item populations is developed. The model combines a multi-indenture maintenance tree concept with a nested Markov chain multistream concept to generate maintenance requirements for the total life cycle under steady-state as well as nonsteady-state conditions. The model meets the maint... View full abstract»

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  • Necessity Measures and the Resolution Principle

    Publication Year: 1987, Page(s):474 - 478
    Cited by:  Papers (60)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1380 KB)

    A careful distinction is made between fuzzy propositions (i.e., propositions involving vague predicates) that may have intermediary degrees of truth, and uncertain propositions (with nonvague predicates) the truth or falsity of which cannot definitely be established due to the incompleteness of the available information. Then the resolution principle is extended in the case of uncertain propositio... View full abstract»

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  • A Direct Manipulation Interface for Water-Based Rankine Cycle Heat Engines

    Publication Year: 1987, Page(s):478 - 487
    Cited by:  Papers (26)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2205 KB)

    A concept for a direct manipulation interface to monitor and control water-based Rankine cycle heat engines is discussed and illustrated. The computer-driven interface utilizes measured plant data to form a model of the process. The model is presented in the form of an icon based upon the Rankine cycle. The icon is formed in terms of the temperature and entropy properties of water from various poi... View full abstract»

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  • A Pattern Recognition Approach to Model Characterization of Distributed Systems

    Publication Year: 1987, Page(s):488 - 495
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1432 KB)

    A pattern recognition system is designed to solve the model characterization problem of distributed systems. The characterization problem in the pattern recognition domain is the mapping of the observation and input data of the distributed system into one of the designated classes. Mathematical structures which are likely to represent the system are designated as classes from the a priori informat... View full abstract»

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  • The Optimal Linear Feature for the Three-Class Equal-Covariance Gaussian Case

    Publication Year: 1987, Page(s):495 - 502
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1427 KB)

    The problem of finding the optimal single feature for the three-class case, where the covariance matrices associated with the three classes are equal, is considered. It is shown, after performing certain preliminary transformations, that the optimal linear feature can be obtained by searching for the zero of a certain monotone function of one variable in a certain specified narrow interval. View full abstract»

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  • Optimized Design of Low-Voltage Distribution Networks a Comprehensive Algorithm

    Publication Year: 1987, Page(s):502 - 507
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1242 KB)

    The optimized design of low-voltage distribution networks is formulated as a linear mixed-integer programming problem. The formulation, in contrast with earlier work, addresses the problem en bloc, catering both to the constraints representing the requirement that the current carried by a cable must be less than or equal to its current carrying capacity, that is, the thermal rating constraints, an... View full abstract»

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  • Integrated Directional Derivative Gradient Operator

    Publication Year: 1987, Page(s):508 - 517
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4384 KB)

    Accurate edge direction information is required in many image processing applications. A variety of operators for computing local edge direction have been proposed, many of them estimating a kind of gradient. These operators face two major problems. One problem is the inherent bias in their estimate of edge direction. The bias itself is a function of edge direction. Another problem is their sensit... View full abstract»

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  • Entropy and Correlation: Some Comments

    Publication Year: 1987, Page(s):517 - 519
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    For measuring the degree of association or correlation between two nominal variables, a measure based on informational entropy is presented as being preferable to that proposed recently by Horibe [1]. Asymptotic developments are also presented that may be used for making approximate statistical inferences about the population measure when the sample size is reasonably large. The use of this method... View full abstract»

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  • Some Characteristic Curves for Dictionary Organization with Digital Search

    Publication Year: 1987, Page(s):520 - 527
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1429 KB)

    Some parameters that characterize the natural language text behavior for typical structuring of a dictionary have been defined. The typical structure of the dictionary considered here is based on trie structure employing digital search. Digital search is well-suited for applications like optical character recognition. The dictionary uses three partitions in its structure. The first partition carri... View full abstract»

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  • Correction to "Decision Aiding Dangers: The Law of the Hammer and Other Maxims"

    Publication Year: 1987, Page(s): 527
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  • Adaptive Methods for Control System Design

    Publication Year: 1987, Page(s): 528
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    Freely Available from IEEE