Donald O. Walter, Kirstie L. Bellman, "Some Issues in Model Integration", pp. 249-254 in Proceedings of the SCS Eastern MultiConference, 23-26 April 1990.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....is not resolvable without violating the design autonomy of the interoperating information systems. They further argue that this necessary violation of autonomy calls into question the utility of research on general architectures. This argument is supported by other authors (Stamper, 1985; Walter and Bellman, 1990) and suggests that in designing a system to access genuinely autonomous data sources the requirement that these data sources be interoperable is likely to prove an intractable barrier. Nevertheless, the urgent need still exists to find a pragmatic solution to this problem that, while it cannot ....

Walter, D.O. and Bellman, K. (1990). Some Issues in Model Integration. In W. Webster and R. Uttamsingh (Eds.), AI and Simulation, Society for Computer Simulation, Simulation Series Vol. 22/3.

....rise, and then spillover into disconnected reservoirs removes some of the constraining water. 4 Data Analysis Strategies In this section, we describe our general strategies for data analysis. Our first main point is that we need a repertoire of methods: no one method can suffice for complex data [10]. We use a style of analysis that we call Model Based Data Analysis. We are actually more interested in the model analysis, not so much data analysis, but we take the two to be essentially the same, because in our view, there is no data without models and situations. Every algorithm and every ....

Donald O. Walter, Kirstie L. Bellman, "Some Issues in Model Integration", pp. 249-254 in Proceedings of the SCS Eastern MultiConference, 23-26 April 1990, Nashville, Tennessee, Simulation Series, Volume 22, No. 3, SCS (1990)

....formalization or level of abstraction suffices to represent a system and reason about its behavior. In practice we find ourselves in constant need of moving back and forth between different formalizations capturing different aspects of a system. For example, as pointed out by Walter and Bellman [55], in the simulation area this need is felt very strongly because of the different types of mathematical models and corresponding constraints that a simulation must satisfy. Similarly, in a large software system we typically have very different requirements, such as functional correctness, proper ....

D. Walter and K. Bellman. Some issues in model integration. In 1990 Eastern Simulation Conference, 1990.

....we learn as we explore the behavior of programs in various execution environments. In addition, and more fundamentally in our opinion, is that there will never be just one generic version of anything but very simple algorithms. This opinion comes from a long study of complexity in models [3] [47] We believe that there is no ONE model that can adequately capture all of the essential features of a complex system, and that therefore, multiple models must always be used and integrated. We therefore expect there to be a hierarchy of problem solving methods, organized by specificity or some ....

Donald O. Walter, Kirstie L. Bellman, "Some Issues in Model Integration", pp. 249-254 in Proceedings of the SCS Eastern MultiConference, 23-26 April 1990.

....the declarative ideal of not having to specify a solution method can be terrifically liberating in conceptual clarity. 3 However, not being able to specify a solution method can be a terrible limitation when a good one is known. Since it is one of our underlying philosophical principles [16] 7] [82] that NO one method suffices for all problems, we would rather be able to use an alternative method when we know a good one, and we would rather not have to program it in a backtracking style, or indeed according to any style chosen a priori, since the difficulty of fitting the method to that ....

Donald O. Walter, Kirstie L. Bellman, "Some Issues in Model Integration", pp. 249-254 in Proceedings of the SCS Eastern MultiConference, 23-26 April 1990, Nashville, Tennessee, Simulation Series, Volume 22(3), SCS (1990)

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