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2015 | OriginalPaper | Buchkapitel

Scalability of Data Decomposition Based Algorithms: Attribute Reduction Problem

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Abstract

This paper studies the issue of scalability of data decomposed based algorithms that are intended for attribute reduction. Two approaches that decompose a decision table and use the relative discernibility matrix method to compute all reducts are investigated. The experiments results reported in this paper show that application of the approaches makes it possible to gain a better scalability compared with the standard algorithm based on the relative discernibility matrix method.

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Fußnoten
1
An implicant of a Boolean function is any conjunction of literals (variables or their negations) such that, if the values of these literals are true under an arbitrary valuation of variables, then the value of the function under the valuation is also true. A prime implicant is a minimal implicant (with respect to the number of literals).
 
2
An algorithm with \(p=1\) is understood as one that is run on non-decomposed data.
 
3
An algorithm is scalable w.r.t. the data size if its run-time grows linearly in proportion to the data size.
 
4
The number of portions each class of the database is divided into grows proportionally to the number of taken samples.
 
Literatur
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2.
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14.
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Metadaten
Titel
Scalability of Data Decomposition Based Algorithms: Attribute Reduction Problem
verfasst von
Piotr Hońko
Copyright-Jahr
2015
DOI
https://doi.org/10.1007/978-3-319-19941-2_37

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