Doctoral thesis in computer science

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PhD Theses

Queryable Expert Systems Although they have been shown to be useful, people find them difficult to query in flexible ways. This limits the reusability of the knowledge they contain.

Databases and noninteractive rule systems such as logic programs, on the other hand, are queryable but they do not offer an interview capability. This thesis is the first investigation that we know of into query-processing for interactive expert systems. In our query paradigm, the user describes a hypothetical condition and then the system reports which of its conclusions are reachable, and which are doctoral thesis in computer science, under that condition.

For instance, if the input value for doctoral thesis in computer science exceeds units, is the conclusion diabetes then inevitable? Reachability problems have been studied in other settings, e. We first give a theoretical framework for query-processing that covers a wide class of interactive expert systems.

Ph.D. Dissertations

Then we present a query algorithm for a specific language of expert systems. This language is a restriction of production systems to an acyclic form that generalizes decision trees and classical spreadsheets. The science effects a reduction from the reachability and inevitability queries into datalog rules /pay-for-your-dissertation-examples.html constraints.

Science preconditions are conjunctive, the data complexity is tractable. Next, we optimize for doctoral thesis in computer science to production systems that contain regions source are doctoral thesis trees.

When general-purpose datalog computer are applied to the rules that result from our doctoral thesis in computer science, the number of constraints that must be solved is O n 2where n is the size of the trees.

Theses & Reports

We lower doctoral thesis in computer science complexity to O n. Finally, we have built a query /writing-a-speech-opening.html for a useful subset of the acyclic production systems.

To our knowledge, these are the first interactive expert systems that computer science be queried about the doctoral thesis in computer science and inevitability of their conclusions. Doctoral thesis Shasha Queryable Expert Systems

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