Inclusion degree: a perspective on measures for rough set data analysis

2002 ◽  
Vol 141 (3-4) ◽  
pp. 227-236 ◽  
Author(s):  
Z.B Xu ◽  
J.Y Liang ◽  
C.Y Dang ◽  
K.S Chin
2021 ◽  
Vol 40 (5) ◽  
pp. 8639-8650
Author(s):  
Sheng Luo

An information system as a database that represents relationships between objects and attributes is an important mathematical model in the field of artificial intelligence. Hybrid data means boolean, categorical, real-valued, set-valued data and missing data in this paper. A hybrid information system is an information system where its attribute is hybrid data. This paper proposes a three-way decision method based on hybrid data. First, the distance between two objects based on the conditional attribute set in a given hybrid information system is developed and Gaussian kernel based on this distance is acquired. Then, the fuzzy Tcos-equivalence relation, induced by this information system, is obtained by using Gaussian kernel. Next, the decision-theoretic rough set model in this hybrid information system is presented. Moreover, a three-way decision method is given by means of this decision-theoretic rough set model and inclusion degree between two fuzzy sets. Finally, an example is employed to illustrate the feasibility of the proposed method, which may provide an effective method for hybrid data analysis in real applications.


2011 ◽  
Vol 58-60 ◽  
pp. 164-170 ◽  
Author(s):  
Ming Jun Wang ◽  
Shu Xian Deng

The present paper based on rough set theory is to analyze the reason of an e-commerce customers losing. The e-commerce is virtual, customers purchase behavior is random, and there is the 20/80 theory. The focus to the e-commerce customers losing predict is to bring enterprise 80percent profits or frequent buying clients, they will be the study samples. Therefore, we must first find out these clients from numerous customers, analyze their purchasing behavior, and it is one of the important links loss prediction. This process may be realized by customer behavior data clustering. We have analyzed the data in one e-commerce database, and according to a certain algorithm has classified these customers, one kind is superior customers, one kind is general customers, the rest is temporary customers. And a lot of questionnaire survey have been done to these kinds of customers, and then combining e-commerce expert opinions formed the customers data analysis and decision table, then the algorithm, which is the decision table blindly delete attribute reduction algorithm, is adopted to process the attributes reduction to the decision table. Then, we get the reduction table of the customers’ data analysis and decision. According to the reduction table, we summarize e-commerce customers’ loss decision rule. Through these decision-making rules, we can predict these losing customers, and take timely measures necessary to retain.


2010 ◽  
Vol 101 (5) ◽  
pp. 538-553 ◽  
Author(s):  
ALIYE AHU AKGÜN ◽  
PETER NIJKAMP ◽  
TÜZIN BAYCAN ◽  
MARTIJN BRONS
Keyword(s):  

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