Download e-book for kindle: Automated Modeling of Physical Systems by P. Pandurang Nayak

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By P. Pandurang Nayak

ISBN-10: 3540606416

ISBN-13: 9783540606413

This publication relies at the author's PhD thesis which used to be chosen in the course of the 1993 ACM Doctoral Dissertation pageant as one of many 3 most sensible submissions.
This monograph investigates the matter of choosing sufficient versions for reasoning approximately actual platforms and purposes to engineering challenge fixing. a chic therapy of either the theoretical and functional facets are offered: the matter is strictly formalized, its computational complexity is analyzed intimately, and a good set of rules for locating sufficient versions is derived; at the sensible facet, a strategy for construction platforms that instantly build sufficient types is supplied, and implementational elements and exams are described.

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This means that the predictions made by the more accurate model fragment are "closer to reality" than the predictions made by the more approximate model fragment. We represent such knowledge using the approximation relation between model fragments. In particular, approximation(m1, m~) says that the model fragment m2 is a more approximate description of some phenomena than the model fragment ml. 6. I approximation(Resistor(wire-l), Ideal-conductor(wire-l)) approximation(Resistor(wire-l), Ideal-insulator(wire-I)) ] Fig.

For example, the required-assumption-classes clause of the Resistor model fragment class specifies resistance-class. , by including either Constant-resistance(wire-l) or Temperature-dependent-resistance ( w i r e - I ) . To relate it to terminology introduced earlier, we have: requires(Resistor(wire-i), resistance-class (wire-l)) P o s s i b l e m o d e l s . Recall that the space of device models was defined by the set of model fragments that can be used to describe the device. This set of model fragments was the union of the model fragments that can be used to describe the components of the device.

Both model fragment classes and component classes are partial descriptions. For example, while the R e s i s t o r model fragment class is a partial description of electrical conduction, the Wire model fragment class is a partial description of what it means for an object to be a wire. The only difference between component classes and model fragment classes is their position in the possible models hierarchy. , component classes are not models of any other class. Therefore, component classes can be viewed as primitive descriptions.

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Automated Modeling of Physical Systems by P. Pandurang Nayak

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