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COMPUTERIZED RISK AND BIOACCUMULATION SYSTEM (VERSION 1.0)
Citation:
II, H., M. Winsor, J. Pelletier, R. Randall, J. Bertling, AND B. Coleman. COMPUTERIZED RISK AND BIOACCUMULATION SYSTEM (VERSION 1.0). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-91/069 (NTIS PB92114164).
Description:
CRABS is a combination of a rule-based expert system and more traditional procedural programming techniques. ule-based expert systems attempt to emulate the decision making process of human experts within a clearly defined subject area. xpert systems consist of an "inference engine" (set of rules and heuristics) and a "knowledge base" which is the specific data relating to the problem addressed. he expert system reaches an answer by processing the user entered data and the information in the knowledge base through the set of rules. hat differentiates an expert system from procedure-based computer models is the use of heuristics or "rules of thumb". xperts consciously or unconsciously use heuristics in addressing problems with incomplete and/or 60ntradictory data (if complete data were available a mathematical algorithm would suffice). deally, using an expert system would be directly analogous to a consultation with the human expert whose knowledge is embodied in the program.