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The Operations of Strong Direct Product and Addition of Formal Contexts

Author: LiMeiZheng
Tutor: MiJuSheng
School: Hebei Normal
Course: Applied Mathematics
Keywords: Formal Concept Analysis Formal context Strong direct product And operators
CLC: TP18
Type: Master's thesis
Year: 2011
Downloads: 6
Quote: 0
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Abstract


Formal context is one of the core concepts of the theory of formal concept analysis of the close ties between the new form of background generated by various operations in the form of background , the original form of background paper defines the form of the background of strong direct product operation , from concept grid , contains attributes , irreducible element and attribute characteristics , rough set four aspects of discussion between the plot and the original background of the n background . proved that the projection of the plot background of the concept in the original background is the original background concept, when certain conditions are met , the Cartesian product of the original background concepts also plot the concepts in the background when the attributes in the respective original background contains known , the product of the background attribute contains can be generated in accordance with the component of the way , and vice versa . irreducible attributes in the original form of background plot background irreducible element of determination method , and then get the properties of the plot background characteristics . plot background set of upper (lower) under certain conditions , the approximation can be written in the collection in the background of each of the original projection of the upper (lower) approximation Cartesian product . based on these studies , the main features of the plot background , and pointed out that with this feature in the form of background can be decomposed . addition is another form of background An operation is divided into upper and operators under and computing , and its essence is a form of background longitudinal synthesis and lateral synthetic extract obtained through the addition of a synthetic form of background in property characteristics , rules , irreducible element , etc. with the original form of the background of the close ties . detailed discussion of the decision-making and decision shaped both cases , the link between the synthetic form of the background and the original background .

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