EXPERT SYSTEMS CAP 6685
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This 4 page Class Notes was uploaded by Sierra Gorczany on Friday September 18, 2015. The Class Notes belongs to CAP 6685 at University of Florida taught by Staff in Fall. Since its upload, it has received 15 views. For similar materials see /class/206727/cap-6685-university-of-florida in System Engineering at University of Florida.
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Date Created: 09/18/15
Blackboard Systems Standard Reasoning Models Backward Reasoning Mycin Tl Personal Consultant Forward Reasoning OPS5 CLIPS Opportunistic Reasoning Blackboard Systems BB1 Blackboard Model Highly structured special case of opportunistic problem solving Prescribes organization of domain knowledge all input all intermediate and partial solutions Organization Solution Space Knowledge Sources One or m0reappicati0n Knowledge sources are dependent hlerarChleS partitions of total domain Information represented at knowledge a level represents partial They can transform solutions to overall information on one level to problem information on another Each level has a unique Might use information on vocabulary several levels to guide transformation Problem Organization Solution Space Knowledge Sources DWDDDD Solution Space Blackboard Data Structure Purpose to hold computational and solution state data Consists of objects from the solution state Hierarchically organized into levels of analysis Objects and their properties define the vocabulary of the solution space Relationships between objects are denoted by named links blackboard can have multiple panels Knowledge Sources Objective to contribute information that will lead to a solution to the problem Each is kept separate and independent Can contain procedures sets of rules or logic assertions Can only modify the blackboard or control structures Are the only thing that can modify the blackboard Each must find the conditions under which it can contribute to a solution each has preconditions to satisfy before activation occurs Control Knowledge Sources respond opportunistically to changes in the blackboard Control modules monitor changes on the blackboard and decide what action to take next The solution is built one step at a time Criteria are provided to determine when to terminate
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