Simmons R, Davis R: The role of Knowledge and Representation in Problem Solving. In: Krivine JP, Simmons R: Second Generation Expert Systems. New York: Springer, 1993: 27-45.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....means which are offered to the medical expert. The use of only one knowledge representational format (e. g frames) is far too restrictive when aiming at a comprehensive representation of a complex medical domain such as neurology (compare the general arguments for multiple representations in [18]. conceptual layer . structural layer domain layer Set Concept Net Parameter Entity of Disease Symptom Syndrome Stroke Parkinson Syndrome typed by . Concept Parameter Attribute . EntityOfDisease Pathogenesis Frequency . Org. Defect . Isc.Cerebral Insult ....

Simmons R, Davis R: The role of Knowledge and Representation in Problem Solving. In: Krivine JP, Simmons R: Second Generation Expert Systems. New York: Springer, 1993: 27-45.

....delete, or revise. 5.2 Lowering Brittleness and Increasing Novelty Construction and maintenance aside, a common concern is how to enhance operational properties of KBSs. One important property is robustness the ability to perform well outside a narrow range of expertise. Simmons and Davis [26] show that a typical way to increase robustness is to improve domain coverage by providing a KBS with multiple knowledge sources, or K s, reflecting different viewpoints (e.g. M. Benaroch Goal Directed Reasoning with ACE SSM 22 22 structural and functional models) levels of granularity ....

....The other usual difficulty is how to integrate results and reasoning across K s implemented using diverse representations. This difficulty is often addressed by using a dedicated logic based intermediary representational language to propagate information and translate between representations (see [26] for details) Our approach avoids this added complexity and effort. First, propagation of information across integrated K s is done through the combined SSMs constructed by the microtheories associated with these K s (see Figure 9) Second, translation across representations is not necessary ....

Simmons, R., and Davis, R., "The Roles of Knowledge and Representation in Problem Solving," in Second Generation Expert Systems, David J.M., Krivine J.P., and Simmons R. (Eds.), Springer-Verlag, London, pp. 27-45, 1993.

.... deeper (Chandrasekaran and Johnson 1993, Finin and Klein 1989 and Swartout 1993) and more (Buchanan and Shortliffe 1984, Hemman 1992 and Lee and Compton 1995) knowledge and the use of different levels of abstraction and different knowledge representations (KR) Chandrasekaran and Johnson 1993 and Simmons and Davis 1993). This study has chosen to use a knowledge acquisition and representation technique which captures knowledge in context without the need for complex modeling, known as ripple down rules (RDR) 2. Ripple Down Rules and Reuse Ripple down rules have addressed two of the major limitations of first ....

Simmons, R. and Davis, R. (1993) The Roles of Knowledge and Representation in Problem Solving In David, J.M., Krivine, J.-P. and Simmons, R., editors Second Generation Expert Systems pp: 273-298. Springer, Berlin.

....we have and how to adapt it to fit the new situation. Current reuse research has concluded that reuse is facilitated by the capturing of contextual [16] 28] deeper [2] 38] and more [1] 17] 23] knowledge and the use of different levels of abstraction and different knowledge representations [2] [36]. The way that RDR addresses these reuse issues and the ability to easily use or adapt existing RDR implementations to handle a wide range of different modes of usage using the same knowledge base has been explored [32] In that study the two main RDR implementations on the personal computer were ....

Simmons, R. and Davis, R. (1993) The Roles of Knowledge and Representation in Problem Solving In David, J.M., Krivine, J.-P. and Simmons, R., editors Second Generation Expert Systems pp: 273-298. Springer, Berlin.

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