Results 141 to 150 of about 3,498,542 (196)
Some of the next articles are maybe not open access.
Ensemble selector for attribute reduction
Applied Soft Computing, 2018Abstract Through abstracting commonness from the existing heuristic algorithms, control strategies bring us higher level understandings of building reducts in rough set theory. To further improve the performances and strengthen the applicabilities of the addition control strategy, an ensemble selector is introduced into such framework.
Xibei Yang, Yiyu Yao
openaire +2 more sources
Information system attribute reduction
Third International Workshop on Advanced Computational Intelligence, 2010This paper describes the information systems as a family of equivalence relations or functions. It brings forward the notion of separation polynomial, which is an expression found by the separators (complement of the equivalence relations) via finite union operations and intersection operations.
Shaobai Chen, Mengfei Cao, Xiaodan Chen
openaire +1 more source
Minimal Attribute Space Bias for Attribute Reduction
2007Attribute reduction is an important inductive learning issue addressed by the Rough Sets society.Most existing works on this issue use the minimal attribute bias, i.e., searching for reducts with the minimal number of attributes. But this bias does not work well for datasets where different attributes have different sizes of domains.
Fan Min 0001 +3 more
openaire +2 more sources
Universal Attribute Reduction Problem
2007In the paper, some generalizations of the notions of reduct and test (superreduct) are considered. The accuracy of greedy algorithm for construction of partial test is investigated. A lower bound on the minimal cardinality of partial reducts based on an information on greedy algorithm work is studied.
Mikhail Ju. Moshkov +2 more
openaire +2 more sources
Consistency Based Attribute Reduction
2007Rough sets are widely used in feature subset selection and attribute reduction. In most of the existing algorithms, the dependency function is employed to evaluate the quality of a feature subset. The disadvantages of using dependency are discussed in this paper. And the problem of forward greedy search algorithm based on dependency is presented.
Qinghua Hu +3 more
openaire +2 more sources
A General Definition of an Attribute Reduct
2007A reduct is a subset of attributes that are jointly sufficient and individually necessary for preserving a particular property of a given information table. A general definition of an attribute reduct is presented. Specifically, we discuss the following issues: First, there are a variety of properties that can be observed in an information table ...
Yan Zhao 0001 +3 more
openaire +2 more sources
An accelerator for attribute reduction based on perspective of objects and attributes
Knowledge-Based Systems, 2013Feature selection is an active area of research in pattern recognition, machine learning and artificial intelligence, which greatly improves the performance of forecasting or classification. In rough set theory, attribute reduction, as a special form of feature selection, aims to retain the discernability of the original attribute set.
Jiye Liang +3 more
openaire +2 more sources
On Covering Attribute Sets by Reducts
2007For any fixed natural k, there exists a polynomial in time algorithm which for a given decision table Tand given kconditional attributes recognizes if there exist a decision reduct of Tcontaining these kattributes.
Mikhail Ju. Moshkov +2 more
openaire +2 more sources
Attribute Reduction: An Ensemble Strategy
2017In rough set theory, the heuristic strategy for computing reducts does not take the stability of the selected attributes into account. An unstable reduct may imply the lower adaption to data variations. To fill such a gap, an ensemble strategy is embedded in heuristic algorithm for achieving stable reducts of variable precision fuzzy rough sets.
Suping Xu +4 more
openaire +2 more sources
Improved general attribute reduction algorithms
Information Sciences, 2020zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Baizhen Li +7 more
openaire +2 more sources