By P. Pandurang Nayak
This booklet is predicated at the author's PhD thesis which used to be chosen in the course of the 1993 ACM Doctoral Dissertation festival as one of many 3 most sensible submissions.
This monograph investigates the matter of choosing sufficient versions for reasoning approximately actual platforms and functions to engineering challenge fixing. a sublime remedy of either the theoretical and useful facets are provided: the matter is exactly formalized, its computational complexity is analyzed intimately, and an effective set of rules for locating sufficient versions is derived; at the useful facet, a strategy for development structures that immediately build sufficient versions is supplied, and implementational elements and exams are described.
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Extra info for Automated Modeling of Physical Systems
It can be described by different sets of equations. Different device models differ because they give different answers to the following two fundamental questions: What must be modeled? Different models can differ because they choose to model different physical phenomena. 2 include the heat generated due to current flow in the wire, but not the electromagnetic field generated by the same current flow. , they choose a different set of objects to model. 2 chose a granularity that includes the bimetallic strip as a single object.
E q u a t i o n s . T h e equations that a modet fragment class inherits to its instances are defined using the e q u a t i o n s clause. These equations are defined 28 2. object)))))] Fig. 11. The Two-terminal-electrical-component model fragment class. using equation schemas. Equation schemas are exactly like equations, except that parameters are replaced by terms like ( r e s i s t a n c e ? o b j e c t ) . To instantiate such equation schemas for specific instances of the model fragment class, the variable " ?
11. The Two-terminal-electrical-component model fragment class. using equation schemas. Equation schemas are exactly like equations, except that parameters are replaced by terms like ( r e s i s t a n c e ? o b j e c t ) . To instantiate such equation schemas for specific instances of the model fragment class, the variable " ? o b j e c t " is bound to the instance, and the terms are replaced by the parameter resulting from evaluating the term. For example, if r e s i s t a n c e ( w i r e - l ) = r e s i s t a n c e - p a r a m e t e r - I , then evaluating the term ( r e s i s t a n c e ?