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    Associative memories, stochastic activity networks and their application to sensor validation systems of nuclear power plants

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    azu_td_1356788_sip1_m.pdf
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    Author
    Shen, Bin
    Issue Date
    1993
    Keywords
    Engineering, Nuclear.
    Advisor
    Williams, John G.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    In this paper, the problem of designing an advanced sensor validation system (SVS) which is robust and fault-tolerant under faulty conditions is considered. Associative memories, which provide robust pattern recognition are investigated as an information processing technology that can be applied to sensor validation. Studies of Binary Associative Memories (BAM) and Continuous Associative Memories (CAM) yield many results including (1) the stability condition of exemplars and spurious memories in BAMs, (2) the formula of choosing diagonal weights and bias that eliminates spurious memories most effectively in BAMs, (3) the convergence theory of CAMs that have asymmetric weight matrix with non-zero diagonal elements and non-monotonically increasing activation functions, (4) the energy function that explores the convergence behavior of CAMs, and (5) the hybrid learning algorithm that reduces spurious memories effectively in CAMs. The concept of performability is introduced to the evaluation of SVS. A set of important performability variables is introduced. Stochastic Activity Networks are used as a modeling tool to evaluate the performability of SVS. An illustration example, the evaluation of the pressurizer SVS of a PWR, is provided.
    Type
    text
    Thesis-Reproduction (electronic)
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Nuclear and Energy Engineering
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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