By Topic

IEEE Expert

Issue 2 • Date April 1993

Filter Results

Displaying Results 1 - 9 of 9
  • Knowledge-based and statistical approaches to text retrieval

    Publication Year: 1993, Page(s):8 - 12
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (610 KB)

    Major research issues in information retrieval are reviewed, and developments in knowledge-based approaches are described. It is argued that although a fair amount of work has been done, the effectiveness of this approach has yet to be demonstrated. It is suggested that statistical techniques and knowledge-based approaches should be viewed as complementary, rather than competitive.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Using statistical methods to improve knowledge-based news categorization

    Publication Year: 1993, Page(s):13 - 23
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1147 KB)

    NLDB, a knowledge-based system that automatically categorizes news stories for dissemination, retrieval, and browsing, is discussed. The major knowledge-based component of NLDB is a lexicosemantic pattern matcher that identifies combinations of words and phrases, as well as more complex patterns. These include word roots, grammatical categories, and semantic structures, such as verbs describing cl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Generating, integrating, and activating thesauri for concept-based document retrieval

    Publication Year: 1993, Page(s):25 - 34
    Cited by:  Papers (14)  |  Patents (2)
    Request permission for commercial reuse | PDF file iconPDF (1325 KB)
    Freely Available from IEEE
  • Self-modeling databases

    Publication Year: 1993, Page(s):35 - 43
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (950 KB)

    The Carper system, which uses inductive learning to check database consistency, even in poorly understood domains, is described. The application of Carper to the Xcon expert system database is discussed. It is shown that Carper can detect five general error types in Xcon: using value naming conventions inconsistently, assigning legal but incorrect values to attributes, omitting obscure but necessa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Diagnosing dynamic faults using modular neural nets

    Publication Year: 1993, Page(s):44 - 53
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1347 KB)

    The use of radial basis function networks (RBFNs) for diagnosis and classification is discussed. Even though RBFNs can be trained quickly compared to backpropagation networks, the training effort is still significant for large-scale diagnosis problems. Rho-Net, an architecture that decomposes the dynamic classification problem in two ways, making such training tractable, is presented. The first de... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Qualitative interpretation of sensor patterns

    Publication Year: 1993, Page(s):54 - 63
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1640 KB)

    A framework that provides the ability to generate qualitative interpretations (QIs) from multisensor trend patterns for monitoring, control, and optimization of chemical plants is presented. QIs are transformations of sensor and quality product data into useful symbolic abstractions. The framework is founded on the principles of similarity-based pattern recognition. Although demonstrated for norma... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Functional representation and reasoning about the F/A-18 aircraft fuel system

    Publication Year: 1993, Page(s):65 - 71
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1254 KB)

    Functional reasoning, a subfield of model-based reasoning, is discussed. This approach uses abstractions of a device's purpose to index behaviors that achieve that purpose. Functional modeling, a variation on this method, also uses simulation as a core reasoning strategy. The complex causal knowledge of a device along functional lines is decomposed, then a causal story of how the device will opera... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The reliability of embedded AI systems

    Publication Year: 1993, Page(s):72 - 78
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (953 KB)

    An artificial intelligence (AI) software reliability model, which accounts for the trade-off between correctness and response time, fuzzy rather than binary output, faults in fundamental techniques used in AI programs, and the evolving database that AI programs rely on, is discussed. The model can be reduced to a simpler form for most applications, such as stand-alone expert systems and game-playi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Net-based computational models of knowledge-processing systems

    Publication Year: 1993, Page(s):79 - 86
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1576 KB)

    Net representation, which provides a uniform semantics to a wide class of computational problems, such as numeric functions, logical systems, and models of dynamic and distributed systems, is reviewed. Using a uniform formalism of colored propositional nets, the methodology of net models is extended to represent Horn clauses, non-Horn clauses, and expert systems. It is shown that, using this forma... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

This Periodical ceased production in 1997. The current retitled publication is IEEE Intelligent Systems.

Full Aims & Scope