Download Abductive Inference Models for Diagnostic Problem-Solving by Yun Peng PDF

By Yun Peng

Making a prognosis whilst anything is going unsuitable with a common or m- made method will be tough. in lots of fields, equivalent to drugs or electr- ics, a protracted education interval and apprenticeship are required to turn into a talented diagnostician. in this time a beginner diagnostician is requested to assimilate a large number of wisdom concerning the classification of structures to be clinically determined. by contrast, the beginner will not be taught the best way to cause with this information in arriving at a end or a prognosis, other than possibly implicitly via ease examples. this could appear to point out that some of the crucial elements of diagnostic reasoning are a kind of intuiti- dependent, logic reasoning. extra accurately, diagnostic reasoning should be categorized as a kind of inf- ence referred to as abductive reasoning or abduction. Abduction is outlined to be a technique of producing a believable reason behind a given set of obs- vations or evidence. even though pointed out in Aristotle's paintings, the examine of f- mal facets of abduction didn't relatively commence till a few century ago.

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Spectrometry" (1) Metal (2) Carbon (3) Sulfur = ? (multiple answers permitted) 1&2 Possibilities now being categorically rejected: Sulfuric Acid (Sulfuric Acid is rejected and removed from the set of existing hypotheses because a spill of Sulfuric Acid will always causes Sulfur to be detected by the spectrometer but it is not detected in this case. The presence of metal evokes four disorders: Hydroxyaluminum, Cesmium, Rubidium, and Radium. None of them is in the current generator. Thus, to cover the old manifestation (acidic pH) and this new manifestation, new hypotheses including at least two disorders must be formed.

HT with programs for parsimonious covering and interfacing to users; the resultant software is thus a complete expert system for diagnostic problem-solving. HT is no longer in active use today, systems modeled after it have Association-Based Abductive Models 25 been used in a variety of industrial, governmental and academic applications. For the Chemical Spill System, there are a total of 14 different types of chemical spills capable of contaminating the water: Sulfuric acid (H2SO4), Hydrochloric acid (HC1), Carbonic acid, Benzene, Petroleum, Thioacetamide, Cesmium, etc.

Which features in the knowledge base are manifestations and which are setting factors are indicated in the database scheme specified by the knowledge base author (see [Reggia81,82b]). In the descriptions of the Chemical Spill Association-Based Abductive Models 27 knowledge base, the only setting factor is the months of use of a chemical, while all of the other assertions specify manifestations. Based on the above conventions, the reader should be able to appreciate that the descriptions above are a fairly accurate representation of the information given in natural-language form.

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