IEEE Transactions on Systems, Man, and Cybernetics

Issue 6 • Nov.-Dec. 1992

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Displaying Results 1 - 20 of 20
  • Derivation and application of hard deadlines for real-time control systems

    Publication Year: 1992, Page(s):1403 - 1413
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (959 KB)

    A method for calculating the hard deadlines in linear time-invariant control systems by considering system stability and the allowed state-space is presented. To derive necessary conditions for asymptotic system stability, the state difference equation is modified based on an assumed maximum delay and the probability distribution of delays whose magnitudes are less than, or equal to, the assumed m... View full abstract»

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  • Associations of fuzzy sets

    Publication Year: 1992, Page(s):1483 - 1488
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The concept of hierarchical models of associations of fuzzy sets (linguistic labels) is discussed. Three basic levels of hierarchy (relational, set-theoretic, and scalar) facilitate the handling of a variety of relationships between fuzzy sets. Learning mechanisms capable of discovering parameters of the models introduced are studied. The inverse problem in models of associations is formulated alo... View full abstract»

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  • Corporate information systems and information technologies

    Publication Year: 1992, Page(s):1323 - 1330
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    A corporate activities business-cycle model composed of PLAN, DO, and SEE activities is described. This model is constructed on two layers: an organizational layer and an individual layer. Regularity of both data structures and algorithms is defined from program production aspects as follows: if the data structures and algorithms of a program can be defined prior to all computations, they are regu... View full abstract»

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  • Discretized estimator learning automata

    Publication Year: 1992, Page(s):1473 - 1483
    Cited by:  Papers (42)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    The improvements gained by rendering the various estimator learning algorithms discrete are investigated. This is done by restricting the probability of selecting an action to a finite discrete subset of [0, 1]. This modification is proven to be ε-optimal in all stationary environments. Various discretized estimator algorithms (DEAs) are constructed. Subsequently, members of the family of DEA... View full abstract»

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  • Agent-based pilot-vehicle interfaces: concept and prototype

    Publication Year: 1992, Page(s):1309 - 1322
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1332 KB)

    The task support system (TSS), an integrative pilot-vehicle interface that consists of a collection of active software units called agents, is discussed. System agents represent aircraft and environmental systems and subsystems, providing databases and control interfaces to support the activities of task agents. Task agents represent tasks the pilot must accomplish in the mission. They assist the ... View full abstract»

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  • An optimization approach for fuzzy controller design

    Publication Year: 1992, Page(s):1469 - 1473
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    A procedure for designing a fuzzy controller using a high-dimensional numerical optimization algorithm is presented. The effectiveness of an optimization program for designing a fuzzy controller is determined, and the relationship between membership functions and controller performance is discussed. The proposed method is applied to the blood pressure regulation problem as a case study View full abstract»

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  • Manipulation and propagation of uncertainty and verification of applicability of actions in assembly tasks

    Publication Year: 1992, Page(s):1376 - 1389
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1164 KB)

    A systematic methodology of manipulating and propagating spatial uncertainties in the form of homogeneous transforms and in a probabilistic sense is presented. Uncertainties are represented by covariance matrices and the manipulation of uncertainties focuses on the spatial uncertainty propagation and the uncertainty fusion. To integrate the uncertainty information into a task plan that consists of... View full abstract»

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  • The role of mental models in team performance in complex systems

    Publication Year: 1992, Page(s):1296 - 1308
    Cited by:  Papers (148)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1380 KB)

    The authors focus on team performance in complex systems. Representative empirical literature is reviewed and models of team performance are discussed. The role of mental models in team performance is considered and several propositions developed that focus on mental models as mechanisms for forming expectations and explanations of team behaviors. The implications of these propositions for team pe... View full abstract»

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  • Verifying a class of nondeterministic discrete event systems in a generalized temporal logic

    Publication Year: 1992, Page(s):1461 - 1469
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    A formal verification method is proposed for a class of nondeterministic discrete event systems in which point probability distributions are known. Such systems are modeled by bounded stochastic models that specify their structures. A linear-time temporal logic is generalized to an uncertain environment in order to establish a framework for system verification. Soundness and completeness of the pr... View full abstract»

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  • An epistemological framework for medical knowledge-based systems

    Publication Year: 1992, Page(s):1361 - 1375
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1604 KB)

    An abstraction paradigm for unifying different perspectives concerning the analysis and design of knowledge-based systems (KBSs) is presented. The model accounts for all of the conceptual features of knowledge-based systems, thus making clear which features are intrinsic to the problem and which are artifacts of the implementation. The proposal is based on a two-level analysis of knowledge-based s... View full abstract»

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  • Symbolic discrete event system specification

    Publication Year: 1992, Page(s):1428 - 1443
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1248 KB)

    An extension of the discrete event system specification modeling formalism (DEVS) that facilitates symbolic expression of event times by extending the time base from the real numbers to the field of linear polynomials over the reals is presented. A simulation algorithm is developed to generate the branching trajectories resulting from the underlying nondeterminism. To efficiently manage symbolic c... View full abstract»

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  • The Chimera II real-time operating system for advanced sensor-based control applications

    Publication Year: 1992, Page(s):1282 - 1295
    Cited by:  Papers (59)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1388 KB)

    The Chimera II has been designed as a local operating system, to be used in conjunction with a global operating system. It executes on one or more single board computers in a VMEbus-based system. Advanced sensor-based control systems are both statistically and dynamically reconfigurable. As a result, they require many special features, which are currently not found in commercial real-time operatin... View full abstract»

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  • Analytical determination of the null space of anthropomorphic manipulators

    Publication Year: 1992, Page(s):1488 - 1492
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The explicit formulation for the Jacobian matrix and its null space for an anthropomorphic manipulator arm with seven degrees of freedom are presented. The manipulability index of this redundant system, which is defined as the determinant of JJT, is the Euclidian norm, of the generated null space vector View full abstract»

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  • Integrating diverse CIM databases: the role of natural language interface

    Publication Year: 1992, Page(s):1331 - 1347
    Cited by:  Papers (3)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1704 KB)

    The problems of heterogeneous, distinct computer integrated manufacturing (CIM) databases and alternative methods to approach these problems are discussed. The literature in three related areas-natural language (NL) interface for database access, database integration, and CIM data requirements-is reviewed. The architecture of the total system is presented. The detailed design of the NL user interf... View full abstract»

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  • SAM: a perceptive spoken language-understanding robot

    Publication Year: 1992, Page(s):1390 - 1402
    Cited by:  Papers (12)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1352 KB)

    Speech activated manipulator (SAM), a reasoning robotic system with sensory capabilities that interacts with a human partner using natural language, is described. The robot understands, in real time, about 1041 semantically meaningful naturally spoken English language sentences using a vocabulary of about 200 words. SAM includes developments in mechanical control, real-time operating systems, mult... View full abstract»

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  • Automating knowledge acquisition as extending, updating, and improving a knowledge base

    Publication Year: 1992, Page(s):1444 - 1460
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1664 KB)

    A method for the automation of knowledge acquisition that is viewed as a process of incremental extension, updating, and improvement of an incomplete and possibly partially incorrect knowledge base of an expert system is presented. The knowledge base is an approximate representation of objects and inference processes in the expertise domain. Its gradual development is guided by the general goal of... View full abstract»

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  • Analysis of associative reinforcement learning in neural networks using iterated function systems

    Publication Year: 1992, Page(s):1348 - 1360
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1084 KB)

    A mathematical theory of associative reinforcement learning in neural networks is developed in terms of random iterated function systems (IFSs), which are finite sets of random maps on metric spaces. In particular, the stochastic search for an associative mapping that maximizes the expected pay-off arising from reinforcement is formulated as a random IFS on weight-space. The dynamical evolution of... View full abstract»

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  • IEEE Transactions on Systems, Man, and Cybernetics: bibliographic analysis and policy considerations

    Publication Year: 1992, Page(s):1245 - 1259
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1308 KB)

    A study was conducted to gain insight into and understanding of the IEEE Systems, Man, and Cybernetics (SMC) Society through its journal, the IEEE Transactions on Systems Man, And Cybernetics (TSMC). The study focuses on publication-related data abstracted from the TSMC, as well as citation-related data on the TSMC and other comparable journals. Based on a detailed analysis of the bibliographic da... View full abstract»

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  • Generating fuzzy rules by learning from examples

    Publication Year: 1992, Page(s):1414 - 1427
    Cited by:  Papers (1395)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1148 KB)

    A general method is developed to generate fuzzy rules from numerical data. The method consists of five steps: divide the input and output spaces of the given numerical data into fuzzy regions; generate fuzzy rules from the given data; assign a degree of each of the generated rules for the purpose of resolving conflicts among the generated rules; create a combined fuzzy rule base based on both the ... View full abstract»

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  • A subject-indexed bibliography of distributed artificial intelligence

    Publication Year: 1992, Page(s):1260 - 1281
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2860 KB)

    An updated version of a large bibliography of articles and books related to distributed artificial intelligence (DAI) is presented. It is intended to be a complete and comprehensive list of research on DAI. It does not contain references to research on distributed computing, parallel processing for AI, connectionism, general AI, or research in social science disciplines that are important to DAI s... View full abstract»

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